10-Q

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, DC 20549

 ____________________________________________________________________________

FORM 10-Q

 ____________________________________________________________________________

(Mark One)

x	Quarterly report pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934
	For the quarterly period ended June 30, 2016

or

o	Transition report pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934
	For the transition period from ______  to  ______

Commission File Number 000-23441

 ____________________________________________________________________________

POWER INTEGRATIONS, INC.

(Exact name of registrant as specified in its charter)

 ____________________________________________________________________________

DELAWARE	94-3065014
(State or other jurisdiction of Incorporation or organization)	(I.R.S. Employer Identification No.)

5245 Hellyer Avenue, San Jose, California, 95138

(Address of principal executive offices) (Zip code)

(408) 414-9200

(Registrant’s telephone number, including area code)

 ____________________________________________________________________________

Indicate by check mark whether the registrant (1) has filed all reports required to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during the preceding 12 months (or for such shorter period that the registrant was required to file such reports), and (2) has been subject to such filing requirements for the past 90 days.    YES  x    NO o

Indicate by check mark whether the registrant submitted electronically and posted on its corporate Web site, if any, every Interactive Data File required to be submitted and posted pursuant to Rule 405 of Regulation S-T (§ 232.405 of this chapter) during the preceding 12 months (or for such shorter period that the registrant was required to submit and post such files).    YES  x   NO  o

Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer or a smaller reporting company. See the definitions of “large accelerated filer,” “accelerated filer” and “smaller reporting company” in Rule 12b-2 of the Exchange Act:

Large accelerated filer  x	Accelerated filer  o
Non-accelerated filer    o (Do not check if  a smaller reporting company)	Smaller reporting company  o

Indicate by check mark whether the registrant is a shell company (as defined in Rule 12b-2 of the Exchange Act).    YES  o    NO  x

Indicate the number of shares outstanding of each of the issuer’s classes of common stock, as of the latest practicable date.

Class	Shares Outstanding at July 15, 2016
Common Stock, $0.001 par value	28,888,357

POWER INTEGRATIONS, INC.

TABLE OF CONTENTS

		Page
PART I. FINANCIAL INFORMATION
Item 1.	Financial Statements
	Condensed Consolidated Balance Sheets as of June 30, 2016 and December 31, 2015	4
	Condensed Consolidated Statements of Income for the three and six months ended June 30, 2016 and 2015	5
	Condensed Consolidated Statements of Comprehensive Income for the three and six months ended June 30, 2016 and 2015	6
	Condensed Consolidated Statements of Cash Flows for the six months ended June 30, 2016 and 2015	7
	Notes to Unaudited Condensed Consolidated Financial Statements	8
Item 2.	Management’s Discussion and Analysis of Financial Condition and Results of Operations	24
Item 3.	Quantitative and Qualitative Disclosures About Market Risk	31
Item 4.	Controls and Procedures	32
PART II. OTHER INFORMATION
Item 1.	Legal Proceedings	32
Item 1A.	Risk Factors	33
Item 2.	Unregistered Sales of Equity Securities and Use of Proceeds	33
Item 5.	Other Information	33
Item 6.	Exhibits	33
SIGNATURES		34

2

Cautionary Note Regarding Forward-Looking Statements

This Quarterly Report on Form 10-Q includes a number of forward-looking statements that involve many risks and uncertainties. Forward-looking statements are identified by the use of the words “would”, “could”, “will”, “may”, “expect”, “believe”, “should”, “anticipate”, “if”, “future”, “intend”, “plan”, “estimate”, “potential”, “target”, “seek” or “continue” and similar words and phrases, including the negatives of these terms, or other variations of these terms, that denote future events. These statements reflect our current views with respect to future events and our potential financial performance and are subject to risks and uncertainties that could cause our actual results and financial position to differ materially and adversely from what is projected or implied in any forward-looking statements included in this Form 10-Q. These factors include, but are not limited to, the risks described under the caption “Risk Factors” in our Annual Report on Form 10-K for the year ended December 31, 2015, and in Item 2 of Part I — “Management’s Discussion and Analysis of Financial Condition and Results of Operations” and elsewhere in this Quarterly Report on Form 10-Q, including, but not limited to: our quarterly operating results are volatile and difficult to predict, and if we fail to meet the expectations of public market analysts or investors, the market price of our common stock may decrease significantly; if demand for our products declines in our major end markets, our net revenues will decrease; intense competition in the high-voltage power supply industry may lead to a decrease in our average selling price and reduced sales volume of our products; if we are unable to adequately protect or enforce our intellectual property rights, we could lose market share, incur costly litigation expenses, suffer incremental price erosion or lose valuable assets, any of which could harm our operations and negatively impact our profitability; if we do not prevail in our litigation, we will have expended significant financial resources, potentially without any benefit, and may also suffer the loss of rights to use some technologies; and our international sales activities account for a substantial portion of our net revenues, which subjects us to substantial risks. We make these forward-looking statements based upon information available on the date of this Form 10-Q, and we have no obligation (and expressly disclaim any obligation) to update or alter any forward-looking statements, whether as a result of new information or otherwise, except as otherwise required by securities regulations.

3

PART I. FINANCIAL INFORMATION

ITEM 1. FINANCIAL STATEMENTS

POWER INTEGRATIONS, INC.

CONDENSED CONSOLIDATED BALANCE SHEETS

(Unaudited)

(In thousands)	June 30, 2016			December 31, 2015
ASSETS
CURRENT ASSETS:
Cash and cash equivalents	$	105,343		$	90,092
Short-term marketable securities	96,891			83,769
Accounts receivable, net of allowances of $511 and $318 in 2016 and 2015, respectively	14,010			7,818
Inventories	46,749			51,934
Prepaid expenses and other current assets	6,478			6,790
Total current assets	269,471			240,403
PROPERTY AND EQUIPMENT, net	95,746			99,381
INTANGIBLE ASSETS, net	34,726			38,165
GOODWILL	91,849			91,849
DEFERRED TAX ASSETS	11,342			11,843
OTHER ASSETS	6,372			5,896
Total assets	$	509,506		$	487,537
LIABILITIES AND STOCKHOLDERS’ EQUITY
CURRENT LIABILITIES:
Accounts payable	$	24,367		$	21,660
Accrued payroll and related expenses	10,463			9,327
Taxes payable	247			3,620
Deferred income on sales to distributors	16,888			15,101
Other accrued liabilities	2,548			2,285
Total current liabilities	54,513			51,993
LONG-TERM INCOME TAXES PAYABLE	2,666			2,511
DEFERRED TAX LIABILITIES	1,004			1,291
OTHER LIABILITIES	3,315			3,123
Total liabilities	61,498			58,918
COMMITMENTS AND CONTINGENCIES (Notes 11, 12 and 13)
STOCKHOLDERS’ EQUITY:
Common stock	28			28
Additional paid-in capital	151,806			145,366
Accumulated other comprehensive loss	(1,527		)	(1,851		)
Retained earnings	297,701			285,076
Total stockholders’ equity	448,008			428,619
Total liabilities and stockholders’ equity	$	509,506		$	487,537

The accompanying notes are an integral part of these unaudited condensed consolidated financial statements.

4

POWER INTEGRATIONS, INC.

CONDENSED CONSOLIDATED STATEMENTS OF INCOME

(Unaudited)

	Three Months Ended				Six Months Ended
	June 30,				June 30,
(In thousands, except per share amounts)	2016		2015		2016		2015
NET REVENUES	$	97,169	$	85,265	$	182,495	$	167,822
COST OF REVENUES	49,532		41,247		91,911		81,512
GROSS PROFIT	47,637		44,018		90,584		86,310
OPERATING EXPENSES:
Research and development	15,859		14,864		30,638		29,805
Sales and marketing	12,018		12,459		23,424		24,572
General and administrative	8,133		7,491		15,983		15,772
Total operating expenses	36,010		34,814		70,045		70,149
INCOME FROM OPERATIONS	11,627		9,204		20,539		16,161
OTHER INCOME (EXPENSE)	236		14		497		(209		)
INCOME BEFORE INCOME TAXES	11,863		9,218		21,036		15,952
PROVISION FOR INCOME TAXES	598		628		928		1,019
NET INCOME	$	11,265	$	8,590	$	20,108	$	14,933
EARNINGS PER SHARE:
Basic	$	0.39	$	0.29	$	0.70	$	0.51
Diluted	$	0.38	$	0.29	$	0.68	$	0.50
SHARES USED IN PER SHARE CALCULATION:
Basic	28,850		29,368		28,765		29,339
Diluted	29,422		30,034		29,361		30,075

The accompanying notes are an integral part of these unaudited condensed consolidated financial statements.

5

POWER INTEGRATIONS, INC.

CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME

(Unaudited)

	Three Months Ended					Six Months Ended
	June 30,					June 30,
(In thousands)	2016		2015			2016			2015
NET INCOME	$	11,265	$	8,590		$	20,108		$	14,933
Other comprehensive income, net of tax:
Foreign currency translation adjustments, net of $0 tax in the three and six months ended June 30, 2016 and 2015	37		(57		)	(17		)	(22		)
Unrealized gain (loss) on marketable securities, net of $0 tax in the three and six months ended June 30, 2016 and 2015	48		(93		)	261			(37		)
Amortization of defined benefit pension items, net of tax of $11 and $22 in the three and six months ended June 30, 2016, respectively, and $4 and $8 in the three and six months ended June 30, 2015, respectively	40		14			80			28
Total other comprehensive income (loss)	125		(136		)	324			(31		)
TOTAL COMPREHENSIVE INCOME	$	11,390	$	8,454		$	20,432		$	14,902

The accompanying notes are an integral part of these unaudited condensed consolidated financial statements.

6

POWER INTEGRATIONS, INC.

CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS

(Unaudited)

	Six Months Ended
	June 30,
(In thousands)	2016			2015
CASH FLOWS FROM OPERATING ACTIVITIES:
Net income	$	20,108		$	14,933
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation	8,521			8,067
Amortization of intangibles	3,439			3,515
Loss on disposal of property and equipment	148			—
Stock-based compensation expense	9,428			8,141
Amortization of premium on marketable securities	429			551
Deferred income taxes	214			86
Increase (reduction) in accounts receivable allowances	193			(85		)
Tax shortfall associated with employee stock plans	—			(189		)
Change in operating assets and liabilities:
Accounts receivable	(6,385		)	(1,050		)
Inventories	5,185			1,203
Prepaid expenses and other assets	(639		)	1,850
Accounts payable	3,039			6,303
Taxes payable and accrued liabilities	(1,566		)	(1,827		)
Deferred income on sales to distributors	1,787			1,235
Net cash provided by operating activities	43,901			42,733
CASH FLOWS FROM INVESTING ACTIVITIES:
Purchases of property and equipment	(4,890		)	(5,144		)
Payment for acquisition, net of cash acquired	—			(15,549		)
Purchases of marketable securities	(66,211		)	(9,993		)
Proceeds from sales and maturities of marketable securities	52,921			29,035
Net cash used in investing activities	(18,180		)	(1,651		)
CASH FLOWS FROM FINANCING ACTIVITIES:
Issuance of common stock under employee stock plans	3,448			4,375
Repurchase of common stock	(6,435		)	(23,176		)
Payments of dividends to stockholders	(7,483		)	(7,048		)
Net cash used in financing activities	(10,470		)	(25,849		)
NET INCREASE IN CASH AND CASH EQUIVALENTS	15,251			15,233
CASH AND CASH EQUIVALENTS AT BEGINNING OF PERIOD	90,092			60,708
CASH AND CASH EQUIVALENTS AT END OF PERIOD	$	105,343		$	75,941
SUPPLEMENTAL DISCLOSURE OF NON-CASH INVESTING AND FINANCING ACTIVITIES:
Unpaid property and equipment	$	1,140		$	2,411
Loan applied to CamSemi purchase price	$	—		$	6,600
SUPPLEMENTAL DISCLOSURE OF CASH FLOW INFORMATION:
Cash paid for income taxes, net	$	4,564		$	2,065

The accompanying notes are an integral part of these unaudited condensed consolidated financial statements.

7

POWER INTEGRATIONS, INC.

NOTES TO UNAUDITED CONDENSED CONSOLIDATED FINANCIAL STATEMENTS

1. BASIS OF PRESENTATION:

The condensed consolidated financial statements include the accounts of Power Integrations, Inc., a Delaware corporation (the “Company”), and its wholly owned subsidiaries. Significant intercompany accounts and transactions have been eliminated in consolidation.

While the financial information furnished is unaudited, the condensed consolidated financial statements included in this report reflect all adjustments (consisting only of normal recurring adjustments) that the Company considers necessary for the fair presentation of the results of operations for the interim periods covered and the financial condition of the Company at the date of the interim balance sheet in accordance with accounting principles generally accepted in the United States of America (“U.S. GAAP”). The results for interim periods are not necessarily indicative of the results for the entire year. The condensed consolidated financial statements should be read in conjunction with the Power Integrations, Inc. consolidated financial statements and the notes thereto for the year ended December 31, 2015, included in its Form 10-K filed on February 11, 2016, with the Securities and Exchange Commission.

2. SIGNIFICANT ACCOUNTING POLICIES AND RECENT ACCOUNTING PRONOUNCEMENTS:

Significant Accounting Policies

No material changes have been made to the Company's significant accounting policies disclosed in Note 2, Summary of Significant Accounting Policies, in its Annual Report on Form 10-K, filed on February 11, 2016, for the year ended December 31, 2015. The accounting policy information below is to aid in the understanding of the financial information disclosed.

Recent Accounting Pronouncements

In May 2014, the Financial Accounting Standards Board ("FASB") amended the existing accounting standards for revenue recognition, Accounting Standards Update ("ASU") 2014-09, Revenue from Contracts with Customers. The amendments are based on the principle that revenue should be recognized to depict the transfer of promised goods or services to customers in an amount that reflects the consideration to which the entity expects to be entitled in exchange for those goods or services. The Company is required to adopt the amendments in the first quarter of 2018. Early adoption is permitted; however, the Company is not permitted to adopt the standard earlier than January 1, 2017. The amendments may be applied retrospectively to each prior period presented or retrospectively with the cumulative effect recognized as of the date of initial application. The Company is currently evaluating the impact of these amendments and the transition alternatives on its consolidated financial statements.

In July 2015, the FASB amended the existing accounting standards for the measurement of inventory, ASU 2015-11, Inventory. The amendments require inventory to be measured at the lower of cost and net realizable value. Net realizable value is the estimated selling prices in the ordinary course of business, less reasonably predictable costs of completion, disposal, and transportation. The Company is required to adopt the amendments in the first quarter of 2017. The amendments should be applied prospectively with early adoption permitted as of the beginning of an interim or annual reporting period. The Company does not expect that the adoption of these amendments will have a material impact on its consolidated financial statements.

In February 2016, the FASB amended the existing accounting standards for leases, ASU 2016-02, Leases. The amendments require lessees to recognize, on the balance sheet, assets and liabilities for the rights and obligations created by leases of greater than twelve months. The accounting by lessors will remain largely unchanged from that applied under previous U.S. GAAP. The Company is required to adopt the amendments in the first quarter of fiscal 2019, with early adoption permitted. The amendments require a modified retrospective transition approach to recognize and measure leases at the beginning of the earliest period presented. The Company is currently evaluating the impact of these amendments and the transition alternatives on its consolidated financial statements.

In March 2016, the FASB amended the existing accounting standards for stock-based compensation, ASU 2016-09, Compensation-Stock Compensation (Topic 718): Improvements to Employee Share-Based Payment Accounting. The amendments impact several aspects of accounting for share-based payment transactions, including the income tax consequences, forfeitures, classification of awards as either equity or liabilities, and classification on the statement of cash flows. The Company is required to adopt the amendments in the first quarter of 2017, with early adoption permitted. If early adoption is elected, all amendments must be adopted in the same period. The manner of application varies by the various provisions of the guidance, with certain provisions applied on a retrospective or modified retrospective approach, while others are applied prospectively. The Company is currently evaluating the impact of these amendments and the transition alternatives on its consolidated financial statements.

8

POWER INTEGRATIONS, INC.

NOTES TO UNAUDITED CONDENSED CONSOLIDATED FINANCIAL STATEMENTS (Continued)

3. COMPONENTS OF THE COMPANY’S CONDENSED CONSOLIDATED BALANCE SHEETS:

Accounts Receivable

(In thousands)	June 30, 2016			December 31, 2015
Accounts receivable trade	$	55,772		$	43,622
Accrued ship and debit and rebate claims	(41,251		)	(35,486		)
Allowance for doubtful accounts	(511		)	(318		)
Total	$	14,010		$	7,818

Inventories

(In thousands)	June 30, 2016		December 31, 2015
Raw materials	$	12,938	$	19,090
Work-in-process	14,227		12,770
Finished goods	19,584		20,074
Total	$	46,749	$	51,934

Prepaid Expenses and Other Current Assets

(In thousands)	June 30, 2016		December 31, 2015
Prepaid legal fees	$	200	$	2,023
Prepaid income tax	855		309
Prepaid maintenance agreements	1,463		736
Interest receivable	401		519
Advance to suppliers	313		324
Other	3,246		2,879
Total	$	6,478	$	6,790

Intangible Assets

	June 30, 2016							December 31, 2015
(In thousands)	Gross		Accumulated Amortization			Net		Gross		Accumulated Amortization			Net
Domain name	$	1,261	$	—		$	1,261	$	1,261	$	—		$	1,261
In-process research and development	4,690		—			4,690		4,690		—			4,690
Technology licenses	3,000		(3,000		)	—		3,000		(2,925		)	75
Developed technology	33,270		(13,577		)	19,693		33,270		(11,670		)	21,600
Customer relationships	20,030		(11,308		)	8,722		20,030		(10,031		)	9,999
In-place leases	660		(300		)	360		660		(120		)	540
Total intangible assets	$	62,911	$	(28,185	)	$	34,726	$	62,911	$	(24,746	)	$	38,165

9

POWER INTEGRATIONS, INC.

NOTES TO UNAUDITED CONDENSED CONSOLIDATED FINANCIAL STATEMENTS (Continued)

The estimated future amortization expense related to finite-lived intangible assets at June 30, 2016, is as follows:

Fiscal Year	Estimated Amortization (in thousands)
2016 (remaining 6 months)	$	3,223
2017	6,084
2018	5,152
2019	4,753
2020	3,528
Thereafter	6,035
Total (1)	$	28,775

_______________

(1) The total above excludes $4.7 million of in-process research and development that will be amortized, upon completion of development, over the estimated useful life of the technology.

Accumulated Other Comprehensive Income (Loss)

Changes in accumulated other comprehensive income (loss) for the three and six months ended June 30, 2016 and 2015, was as follows:

	Unrealized Gains and Losses on Marketable Securities					Defined Benefit Pension Items										Foreign Currency Items						Total
	Three Months Ended					Three Months Ended										Three Months Ended						Three Months Ended
	June 30,					June 30,										June 30,						June 30,
(In thousands)	2016		2015			2016					2015					2016			2015			2016			2015
Beginning balance	$	116	$	139		$	(1,544	)			$	(1,226	)			$	(224	)	$	56		$	(1,652	)	$	(1,031	)
Other comprehensive income (loss) before reclassifications	48		(93		)	—					—					37			(57		)	85			(150		)
Amounts reclassified from accumulated other comprehensive income (loss)	—		—			40			(1	)	14			(1	)	—			—			40			14
Net-current period other comprehensive income (loss)	48		(93		)	40					14					37			(57		)	125			(136		)
Ending balance	$	164	$	46		$	(1,504	)			$	(1,212	)			$	(187	)	$	(1	)	$	(1,527	)	$	(1,167	)

_______________

(1) This component of accumulated other comprehensive income (loss) is included in the computation of net periodic pension cost for the three months ended June 30, 2016 and 2015.

10

POWER INTEGRATIONS, INC.

NOTES TO UNAUDITED CONDENSED CONSOLIDATED FINANCIAL STATEMENTS (Continued)

	Unrealized Gains and Losses on Marketable Securities						Defined Benefit Pension Items										Foreign Currency Items						Total
	Six Months Ended						Six Months Ended										Six Months Ended						Six Months Ended
	June 30,						June 30,										June 30,						June 30,
(In thousands)	2016			2015			2016					2015					2016			2015			2016			2015
Beginning balance	$	(97	)	$	83		$	(1,584	)			$	(1,240	)			$	(170	)	$	21		$	(1,851	)	$	(1,136	)
Other comprehensive income (loss) before reclassifications	261			(37		)	—					—					(17		)	(22		)	244			(59		)
Amounts reclassified from accumulated other comprehensive income (loss)	—			—			80			(1	)	28			(1	)	—			—			80			28
Net-current period other comprehensive income (loss)	261			(37		)	80					28					(17		)	(22		)	324			(31		)
Ending balance	$	164		$	46		$	(1,504	)			$	(1,212	)			$	(187	)	$	(1	)	$	(1,527	)	$	(1,167	)

_______________

(1) This component of accumulated other comprehensive income (loss) is included in the computation of net periodic pension cost for the six months ended June 30, 2016 and 2015.

4. FAIR VALUE MEASUREMENTS:

The FASB established a three-tier value hierarchy, which prioritizes the inputs used in measuring fair value as follows: (Level 1) observable inputs such as quoted prices for identical assets in active markets; (Level 2) inputs other than the quoted prices in active markets that are observable either directly or indirectly; and (Level 3) unobservable inputs in which there is little or no market data, which requires the Company to develop its own assumptions. This hierarchy requires the Company to use observable market data, when available, and to minimize the use of unobservable inputs when determining fair value.

The Company's cash equivalents and short-term marketable securities are classified within Level 1 or Level 2 of the fair-value hierarchy because they are valued using quoted market prices, broker or dealer quotations, or alternative pricing sources with reasonable levels of price transparency.

    The fair-value hierarchy of the Company's cash equivalents and marketable securities at June 30, 2016, and December 31, 2015, was as follows:

	Fair Value Measurement at
	June 30, 2016
(In thousands)	Total Fair Value		Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)
Commercial paper	$	55,800	$	—	$	55,800
Money market funds	770		770		—
Corporate securities	80,393		—		80,393
Total	$	136,963	$	770	$	136,193

11

POWER INTEGRATIONS, INC.

NOTES TO UNAUDITED CONDENSED CONSOLIDATED FINANCIAL STATEMENTS (Continued)

	Fair Value Measurement at
	December 31, 2015
(In thousands)	Total Fair Value		Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)
Commercial paper	$	21,194	$	—	$	21,194
Money market funds	104		104		—
Corporate securities	83,769		—		83,769
Total	$	105,067	$	104	$	104,963

The Company did not transfer any investments between Level 1 and Level 2 of the fair-value hierarchy in the six months ended June 30, 2016, and the twelve months ended December 31, 2015.

5. MARKETABLE SECURITIES:

Amortized cost and estimated fair market value of marketable securities classified as available-for-sale (excluding cash equivalents) at June 30, 2016, were as follows:

	Amortized Cost		Gross Unrealized					Estimated Fair Market Value
(In thousands)			Gains		Losses
Investments due in less than 3 months:
Commercial paper	$	8,189	$	—	$	—		$	8,189
Corporate securities	14,027		—		(3		)	14,024
Total	22,216		—		(3		)	22,213
Investments due in 4-12 months:
Commercial paper	8,309		—		—			8,309
Corporate securities	33,591		50		—			33,641
Total	41,900		50		—			41,950
Investments due between 12 months and 5 years:
Corporate securities	32,611		117		—			32,728
Total	32,611		117		—			32,728
Total marketable securities	$	96,727	$	167	$	(3	)	$	96,891

12

POWER INTEGRATIONS, INC.

NOTES TO UNAUDITED CONDENSED CONSOLIDATED FINANCIAL STATEMENTS (Continued)

Amortized cost and estimated fair market value of marketable securities classified as available-for-sale (excluding cash equivalents) at December 31, 2015, were as follows:    

	Amortized Cost		Gross Unrealized					Estimated Fair Market Value
(In thousands)			Gains		Losses
Investments due in less than 3 months:
Corporate securities	$	38,586	$	7	$	(10	)	$	38,583
Total	38,586		7		(10		)	38,583
Investments due in 4-12 months:
Corporate securities	33,654		1		(36		)	33,619
Total	33,654		1		(36		)	33,619
Investments due between 12 months and 5 years:
Corporate securities	11,626		—		(59		)	11,567
Total	11,626		—		(59		)	11,567
Total marketable securities	$	83,866	$	8	$	(105	)	$	83,769

As of June 30, 2016, and December 31, 2015, the Company evaluated the nature of the investments with a loss position, which were primarily high-quality corporate securities, and determined the unrealized losses were not other-than-temporary.

6. STOCK-BASED COMPENSATION:

The following table summarizes the stock-based compensation expense recognized in accordance with ASC 718-10 for the three and six months ended June 30, 2016, and June 30, 2015:

	Three Months Ended				Six Months Ended
	June 30,				June 30,
(In thousands)	2016		2015		2016		2015
Cost of revenues	$	293	$	257	$	383	$	506
Research and development	1,940		1,306		3,409		2,697
Sales and marketing	899		878		1,926		1,890
General and administrative	1,880		1,309		3,710		3,048
Total stock-based compensation expense	$	5,012	$	3,750	$	9,428	$	8,141

Stock-based compensation expense in the three months ended June 30, 2016 was $5.0 million (comprising approximately $0.1 million related to stock options, $1.6 million related to performance-based (PSU) awards and long-term performance-based (PRSU) awards, $3.0 million related to restricted stock unit (RSU) awards and $0.3 million related to the Company’s employee stock purchase plan). In the six months ended June 30, 2016, stock compensation expense was $9.4 million (comprising approximately $0.2 million related to stock options, $2.3 million related to PSUs and PRSUs, $6.3 million related to RSUs and $0.6 million related to the Company’s employee stock purchase plan).

Stock-based compensation expense in the three months ended June 30, 2015 was $3.8 million (comprising approximately $0.2 million related to stock options, $0.2 million related to PSUs and PRSUs, $3.1 million related to RSUs and $0.3 million related to the Company’s employee stock purchase plan). In the six months ended June 30, 2015, stock-based compensation expense was $8.1 million (comprising approximately $0.4 million related to stock options, $0.8 million related to PSUs and PRSUs, $6.3 million related to RSUs and $0.6 million related to the Company’s employee stock purchase plan).

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Stock Options

A summary of stock options outstanding as of June 30, 2016, and activity during the six months then ended, is presented below:

	Shares (in thousands)		Weighted- Average Exercise Price		Weighted-Average Remaining Contractual Term (in years)	Aggregate Intrinsic Value (in thousands)
Outstanding at January 1, 2016	1,030		$	27.58
Granted	—		$	—
Exercised	(44	)	$	23.31
Forfeited or expired	—		$	—
Outstanding at June 30, 2016	986		$	27.77	2.76	$	21,911
Exercisable at June 30, 2016	986		$	27.77	2.76	$	21,911
Vested and expected to vest at June 30, 2016	986		$	27.77	2.76	$	21,911

PSU Awards

Under the performance-based awards program, the Company grants awards in the performance year in an amount equal to twice the target number of shares to be issued if the maximum performance metrics are met. The number of shares that are released at the end of the performance year can range from zero to 200% of the target number depending on the Company’s performance. The performance metrics of this program are annual targets consisting of a combination of net revenue, non-GAAP operating income and strategic goals.

As the net revenue, non-GAAP operating income and strategic goals are considered performance conditions, expense associated with these awards, net of estimated forfeitures, is recognized over the service period based on an assessment of the achievement of the performance targets. The fair value of these PSUs is determined using the fair value of the Company’s common stock on the date of the grant, reduced by the discounted present value of dividends expected to be declared before the awards vest. If the performance conditions are not achieved, no compensation cost is recognized and any previously recognized compensation is reversed.

In January 2016, it was determined that approximately 11,000 shares of the PSUs granted in 2015, vested in aggregate and were released to the Company’s employees and executives in the first quarter of 2016.

A summary of PSUs outstanding as of June 30, 2016, and activity during the six months then ended, is presented below:

	Shares (in thousands)		Weighted-Average Grant Date Fair Value Per Share		Weighted-Average Remaining Contractual Term (in years)	Aggregate Intrinsic Value (in thousands)
Outstanding at January 1, 2016	11		$	52.35
Granted	100		$	46.12
Vested	(11	)	$	52.35
Forfeited	—		$	—
Outstanding at June 30, 2016	100		$	46.12	0.50	$	4,983
Outstanding and expected to vest at June 30, 2016	97				0.50	$	4,834

PRSU Awards

      The Company's PRSU program provides for the issuance of PRSUs which will vest based on the Company's performance measured against the PRSU program's established revenue targets. PRSUs are granted in an amount equal to twice the target number of shares to be issued if the maximum performance metrics are met. The actual number of shares the recipient receives is determined at the end of a three-year performance period based on results achieved versus the Company's performance goals, and may range from zero to 200% of the target number. The performance goals for PRSUs granted in fiscal 2014, 2015 and 2016 were based on the Company’s annual revenue growth over the respective three-year performance period.

Expense associated with these awards, net of estimated forfeitures, is recorded throughout the year depending on the

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number of shares expected to vest based on progress toward the performance target. If the performance conditions are not achieved, no compensation cost is recognized and any previously recognized compensation is reversed.

A summary of PRSUs outstanding as of June 30, 2016, and activity during the six months then ended, is presented below:

	Shares (in thousands)	Weighted-Average Grant Date Fair Value Per Share		Weighted-Average Remaining Contractual Term (in years)	Aggregate Intrinsic Value (in thousands)
Outstanding at January 1, 2016	129	$	53.75
Granted	78	$	43.26
Vested	—	$	—
Forfeited	—	$	—
Outstanding at June 30, 2016	207	$	49.78	1.60	$	10,351
Outstanding and expected to vest at June 30, 2016	96			1.57	$	4,777

RSU Awards

A summary of RSUs outstanding as of June 30, 2016, and activity during the six months then ended, is presented below:

	Shares (in thousands)		Weighted- Average Grant Date Fair Value Per Share		Weighted-Average Remaining Contractual Term (in years)	Aggregate Intrinsic Value (in thousands)
Outstanding at January 1, 2016	681		$	46.98
Granted	297		$	45.82
Vested	(251	)	$	45.14
Forfeited	(11	)	$	46.75
Outstanding at June 30, 2016	716		$	47.15	1.70	$	35,789
Outstanding and expected to vest at June 30, 2016	657				1.65	$	32,829

7. SIGNIFICANT CUSTOMERS AND INTERNATIONAL SALES:

Segment Reporting

The Company is organized and operates as one reportable segment, the design, development, manufacture and marketing of integrated circuits and related components for use primarily in the high-voltage power-conversion market. The Company’s chief operating decision maker, the Chief Executive Officer, reviews financial information presented on a consolidated basis for purposes of making operating decisions and assessing financial performance.

Customer Concentration

The Company's top ten customers accounted for approximately 63% and 62% of net revenues for the three and six months ended June 30, 2016, respectively and approximately 62% and 60% of net revenues, respectively, in the corresponding periods of the previous year. A significant portion of these revenues are attributable to sales of the Company’s products to distributors of electronic components. These distributors sell the Company’s products to a broad, diverse range of end users, including original equipment manufacturers (OEMs) and merchant power supply manufacturers.

In the three and six months ended June 30, 2016, two customers, both distributors of the Company's products, accounted for more than 10% of the Company’s net revenues. In the three and six months ended June 30, 2015, one customer, also a distributor, accounted for more than 10% of net revenues.

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The following table discloses these customers’ percentage of revenues for the respective periods:

	Three Months Ended				Six Months Ended
	June 30,				June 30,
Customer	2016		2015		2016		2015
Avnet	19	%	22	%	20	%	22	%
Powertech Distribution Ltd.	13	%	*		13	%	*

_______________                        

* Total customer percentage of revenues was less than 10%.

No other customers accounted for 10% or more of the Company’s net revenues in the periods presented.

Concentration of Credit Risk

Financial instruments that potentially subject the Company to concentrations of credit risk consist principally of cash investments and trade receivables. The Company does not have any off-balance-sheet credit exposure related to its customers. As of June 30, 2016, and December 31, 2015, 70% and 66%, respectively, of accounts receivable were concentrated with the Company’s top 10 customers.

The following customers represented 10% or more of accounts receivable:

Customer	June 30, 2016		December 31, 2015
Avnet	25	%	20	%
ATM Electronic Corporation	13	%	10	%

International Sales

The Company markets its products globally through its sales personnel and a worldwide network of independent sales representatives and distributors. As a percentage of total net revenues, international sales, which consist of sales to distributors and direct customers outside of the United States of America, comprise the following:

	Three Months  Ended				Six Months Ended
	June 30,				June 30,
	2016		2015		2016		2015
Hong Kong/China	51	%	51	%	50	%	49	%
Taiwan	14	%	14	%	13	%	13	%
Korea	10	%	8	%	11	%	10	%
Western Europe (excluding Germany)	11	%	11	%	11	%	11	%
Japan	5	%	6	%	5	%	6	%
Germany	2	%	2	%	2	%	2	%
Other	3	%	3	%	4	%	4	%
Total foreign revenue	96	%	95	%	96	%	95	%

The remainder of the Company’s sales is to customers within the United States of America.

8. COMMON STOCK REPURCHASES AND CASH DIVIDENDS:

Common Stock Repurchases

In the six months ended June 30, 2016, the Company purchased approximately 146,000 shares of the Company’s common stock for $6.4 million. As of June 30, 2016, the Company had approximately $23.6 million remaining under the repurchase program, which has no expiration date. Authorization of future repurchase programs is at the discretion of the board of directors and will depend on the Company’s financial condition, results of operations, capital requirements, business conditions and other factors.

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Cash Dividends

In January 2016, the Company’s board of directors declared four quarterly cash dividends in the amount of $0.13 per share to be paid to stockholders of record at the end of each quarter in 2016.

	Three Months Ended				Six Months Ended
(In thousands, except per share amounts)	June 30, 2016		June 30, 2015		June 30, 2016		June 30, 2015
Dividends declared and paid	$	3,754	$	3,529	$	7,483	$	7,048
Dividends declared per common share	$	0.13	$	0.12	$	0.26	$	0.24

9. EARNINGS PER SHARE:

Basic earnings per share are calculated by dividing net income by the weighted-average shares of common stock outstanding during the period. Diluted earnings per share are calculated by dividing net income by the weighted-average shares of common stock and dilutive common equivalent shares outstanding during the period. Dilutive common equivalent shares included in this calculation consist of dilutive shares issuable upon the assumed exercise of outstanding common stock options, the assumed vesting of outstanding restricted stock units and both short- and long-term performance-based awards, and the assumed issuance of awards under the stock purchase plan, as computed using the treasury stock method.

A summary of the earnings per share calculation is as follows:    

	Three Months Ended				Six Months Ended
	June 30,				June 30,
(In thousands, except per share amounts)	2016		2015		2016		2015
Basic earnings per share:
Net income	$	11,265	$	8,590	$	20,108	$	14,933
Weighted-average common shares	28,850		29,368		28,765		29,339
Basic earnings per share	$	0.39	$	0.29	$	0.70	$	0.51
Diluted earnings per share: (1)
Net income	$	11,265	$	8,590	$	20,108	$	14,933
Weighted-average common shares	28,850		29,368		28,765		29,339
Effect of dilutive awards:
Employee stock plans	572		666		596		736
Diluted weighted-average common shares	29,422		30,034		29,361		30,075
Diluted earnings per share	$	0.38	$	0.29	$	0.68	$	0.50

_______________

(1) The Company includes the shares underlying performance-based awards in the calculation of diluted earnings per share if the performance conditions have been satisfied as of the end of the reporting period and excludes such shares when the necessary conditions have not been met. The Company has excluded the shares underlying the outstanding performance-based awards in the 2016 and 2015 calculations as the shares were not contingently issuable as of the end of the reporting periods. 

In the three and six months ended June 30, 2016 and 2015, no outstanding stock awards were determined to be anti-dilutive and therefore excluded from the computation of diluted earnings per share.

10. PROVISION FOR INCOME TAXES:

Income-tax expense includes a provision for federal, state and foreign taxes based on the annual estimated effective tax rate applicable to the Company and its subsidiaries, adjusted for certain discrete items which are fully recognized in the period they occur.

The Company's effective tax rates for the three and six months ended June 30, 2016, were 5.0% and 4.4%, respectively. The difference between the statutory rate of 35% and the Company’s effective tax rates for the three and six months ended June 30,

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2016, was due primarily to the beneficial impact of the geographic distribution of the Company’s world-wide earnings and the federal research and development tax credit which was permanently extended in December 2015. The Company's effective tax rates for the three and six months ended June 30, 2015, were 6.8% and 6.4%, respectively. The difference between the expected statutory rate of 35% and the Company's effective tax rates for the three and six months ended June 30, 2015, was due primarily to the beneficial impact of the geographic distribution of the Company's world-wide earnings.

As of June 30, 2016, the Company maintained a valuation allowance on its California deferred tax assets, New Jersey deferred tax assets, capital losses for federal purposes and a valuation allowance with respect to its deferred tax assets relating to tax credits in Canada.

To ensure an additional source of U.S. cash, the Company plans to repatriate a portion of its current year offshore earnings to the U.S. for domestic operations. The Company has accordingly provided for the estimated federal and state income taxes on such portion of its current year offshore earnings. If circumstances change and it becomes apparent that some or all of the undistributed earnings of the Company’s offshore subsidiary will be remitted in the foreseeable future but income taxes have not been recognized, the Company will accrue income taxes attributable to such undistributed earnings.

Determining the consolidated provision for income tax expense, income tax liabilities and deferred tax assets and liabilities involves judgment. The Company calculates and provides for income taxes in each of the tax jurisdictions in which it operates, which involves estimating current tax exposures as well as making judgments regarding the recoverability of deferred tax assets in each jurisdiction. The estimates used could differ from actual results, which may have a significant impact on operating results in future periods.

On July 27, 2015, in Altera Corp. v. Commissioner, the U.S. Tax Court issued an opinion related to the treatment of stock-based compensation expense in an intercompany cost-sharing arrangement. A final decision was issued by the Tax Court in December 2015. In February 2016, the Commissioner appealed the Tax Court decision. At this time, the U.S. Department of the Treasury has not withdrawn the requirement to include stock-based compensation expense from IRS cost-sharing regulations. The Company has reviewed this case and its impact and concluded that no adjustment to the consolidated financial statements is appropriate at this time. The Company will continue to monitor ongoing developments and potential impacts to the consolidated financial statements.

11. COMMITMENTS:

Supplier Agreements

Under the terms of the Company's wafer-supply agreements with Seiko Epson Corporation ("Epson"), and ROHM Lapis Semiconductor Co., Ltd. ("Lapis") the wafers purchased from these suppliers are priced in U.S. dollars; however, these agreements also allow for mutual sharing of the impact of the exchange rate fluctuation between Japanese yen and the U.S. dollar on future purchases. Each year, the Company's management and these two suppliers review and negotiate future pricing; the negotiated pricing is denominated in U.S. dollars but is subject to contractual exchange rate provisions. The fluctuation in the exchange rate is shared equally between the Company and each of these suppliers on future purchases.

12. LEGAL PROCEEDINGS AND CONTINGENCIES:

From time to time in the ordinary course of business, the Company becomes involved in lawsuits, or customers and distributors may make claims against the Company. In accordance with ASC 450-10, Contingencies, the Company makes a provision for a liability when it is both probable that a liability has been incurred and the amount of the loss can be reasonably estimated.

On October 20, 2004, the Company filed a complaint against Fairchild Semiconductor International, Inc. and Fairchild Semiconductor Corporation (referred to collectively as “Fairchild”) in the United States District Court for the District of Delaware. In its complaint, the Company alleged that Fairchild has and is infringing four of Power Integrations’ patents pertaining to pulse width modulation (PWM) integrated circuit devices. Fairchild denied infringement and asked for a declaration from the court that it does not infringe any Power Integrations patent and that the patents are invalid. The Court issued a claim construction order on March 31, 2006 which was favorable to the Company. The Court set a first trial on the issues of infringement, willfulness and damages for October 2, 2006. At the close of the first trial, on October 10, 2006, the jury returned a verdict in favor of the Company finding all asserted claims of all four patents-in-suit to be willfully infringed by Fairchild and awarding $34.0 million in damages.

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Fairchild raised defenses contending that the asserted patents are invalid or unenforceable, and the Court held a second trial on these issues beginning on September 17, 2007. On September 21, 2007, the jury returned a verdict in the Company’s favor, affirming the validity of the asserted claims of all four patents-in-suit. Fairchild submitted further materials on the issue of enforceability along with various other post-trial motions, and the Company filed post-trial motions seeking a permanent injunction and increased damages and attorneys’ fees, among other things. On September 24, 2008, the Court denied Fairchild’s motion regarding enforceability and ruled that all four patents are enforceable. On December 12, 2008, the Court ruled on the remaining post-trial motions, including granting a permanent injunction, reducing the damages award to $6.1 million, granting Fairchild a new trial on the issue of willful infringement in view of an intervening change in the law, and denying the Company’s motion for increased damages and attorneys’ fees with leave to renew the motion after the resolution of the issue of willful infringement. On December 22, 2008, at Fairchild’s request, the Court temporarily stayed the permanent injunction for 90 days. On January 12, 2009, Fairchild filed a notice of appeal challenging the Court’s refusal to enter a more permanent stay of the injunction, and Fairchild filed additional motions requesting that both the Federal Circuit and the District Court extend the stay of injunction. The District Court temporarily extended the stay pending the Federal Circuit ruling on Fairchild’s pending motion, but the Federal Circuit dismissed Fairchild’s appeal and denied its motion on May 5, 2009, and the District Court issued an order on May 13, 2009 confirming the reinstatement of the permanent injunction as originally entered in December 2008. On June 22, 2009, the Court held a brief bench re-trial on the issue of willful infringement. On July 22, 2010, the Court found that Fairchild willfully infringed all four of the asserted patents, and the Court also invited briefing on enhanced damages and attorneys’ fees. Fairchild also filed a motion requesting that the Court amend its findings regarding willfulness. On January 18, 2011, the Court denied Fairchild’s request to amend the findings regarding Fairchild’s willful infringement and doubled the damages award against Fairchild but declined to award attorneys’ fees. On February 3, 2011, the Court entered final judgment in favor of the Company for a total damages award of $12.9 million. Fairchild filed a notice of appeal challenging the final judgment and a number of the underlying rulings, and the Company filed a cross-appeal seeking to increase the damages award. The appeal was argued on January 11, 2012, and the Federal Circuit issued a mixed ruling on March 26, 2013, affirming Fairchild’s infringement of certain claims that support the basis for the permanent injunction while reversing, vacating, and remanding the findings with respect to other claims, including the Company’s claim for damages. The Company filed a petition seeking Supreme Court review of the Federal Circuit’s ruling on damages issues, and the Supreme Court called for a response from Fairchild but ultimately declined to review the case. On remand, the Company intends to pursue its claim for financial compensation based on Fairchild’s infringement.

On May 9, 2005, the Company filed a Complaint with the U.S. International Trade Commission (ITC) under section 337 of the Tariff Act of 1930, as amended, 19 U.S.C. Section 1337 against System General (SG). The Company filed a supplement to the complaint on May 24, 2005. The Company alleged infringement of its patents pertaining to PWM integrated circuit devices produced by SG, which are used in power conversion applications such as power supplies for computer monitors. The Commission instituted an investigation on June 8, 2005 in response to the Company’s complaint. SG filed a response to the ITC complaint asserting that the patents-in-suit were invalid and not infringed. The Company subsequently and voluntarily narrowed the number of patents and claims in suit, which proceeded to a hearing. The hearing on the investigation was held before the Administrative Law Judge (ALJ) from January 18 to January 24, 2006. Post-hearing briefs were submitted and briefing concluded February 24, 2006. The ALJ’s initial determination was issued on May 15, 2006. The ALJ found all remaining asserted claims valid and infringed, and recommended the exclusion of the infringing products as well as certain downstream products that contain the infringing products. After further briefing, on June 30, 2006, the Commission decided not to review the initial determination on liability, but did invite briefs on remedy, bonding and the public interest. On August 11, 2006, the Commission issued an order excluding from entry into the United States the infringing SG PWM chips, and any liquid-crystal-display (LCD) computer monitors, AC printer adapters and sample/demonstration circuit boards containing an infringing SG chip. The U.S. Customs Service is authorized to enforce the exclusion order. On October 11, 2006, the presidential review period expired without any action from the President, and the ITC exclusion order is now in full effect. SG appealed the ITC decision, and on November 19, 2007, the Federal Circuit affirmed the ITC’s findings in all respects. On October 27, 2008, SG filed a petition to modify the exclusion order in view of a recent Federal Circuit opinion in an unrelated case, and the Company responded to oppose any modification, but the Commission modified the exclusion order on February 27, 2009. Nevertheless, the exclusion order still prohibits SG and related entities from importing the infringing SG chips and any LCD computer monitors, AC printer adapters, and sample/demonstration circuit boards containing an infringing SG chip.

On May 23, 2008, the Company filed a complaint against Fairchild Semiconductor International, Inc., Fairchild Semiconductor Corporation, and Fairchild’s wholly owned subsidiary System General Corporation (referred to collectively as “Fairchild”), in the United States District Court for the District of Delaware. In its complaint, the Company alleged that Fairchild has infringed and is infringing three patents pertaining to power supply controller integrated circuit devices. Fairchild answered the Company’s complaint on November 7, 2008, denying infringement and asking for a declaration from the Court that it does

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not infringe any Power Integrations patent and that the patents are invalid and unenforceable. Fairchild’s answer also included counterclaims accusing the Company of infringing three patents pertaining to primary side power conversion integrated circuit devices. Fairchild had earlier brought these same claims in a separate suit against the Company, also in Delaware, which Fairchild dismissed in favor of adding its claims to the Company’s already pending suit against Fairchild. The Company has answered Fairchild’s counterclaims, denying infringement and asking for a declaration from the Court that it does not infringe any Fairchild patent and that the Fairchild patents are invalid. Fairchild also filed a motion to stay the case, but the Court denied that motion on December 19, 2008. On March 5, 2009, Fairchild filed a motion for summary judgment to preclude any recovery for post-verdict sales of parts found to infringe in the parties’ other ongoing litigation, described above, and the Company filed its opposition and a cross-motion to preclude Fairchild from re-litigating the issues of infringement and damages for those same products. On June 26, 2009, the Court held a hearing on the parties’ motions, and on July 9, 2009 the Court issued an order denying the parties’ motions but staying proceedings with respect to the products that were found to infringe and which are subject to the injunction in the other Delaware case between the parties pending the entry of final judgment in that case; those products are expected to be addressed in the context of the parties’ remand proceedings following the appeal in their earlier litigation in Delaware, and the remainder of the case is proceeding. On December 18, 2009, the Court issued an order construing certain terms in the asserted claims of the Company’s and Fairchild’s patents in suit. Following the Court’s ruling on claim construction, Fairchild withdrew its claim related to one of its patents and significantly reduced the number of claims asserted for the remaining two patents. The parties thereafter filed and argued a number of motions for summary judgment, and the Court denied the majority of the parties’ motions but granted the Company’s motion to preclude Fairchild from re-arguing validity positions that were rejected in the prior case between the parties. Because the assigned Judge retired at the end of July 2010, the case was re-assigned to a different Judge, and the Court vacated the trial schedule and had the parties provide their input on the appropriate course of action. The Court thereafter set a trial schedule with the jury trial on infringement and validity to begin in July 2011. On April 18, 2011, the Court rescheduled the trial to begin in January 2012, and on June 2, 2011, the Court moved the trial date to April 2012 to permit the parties to address another patent the Company accused Fairchild of infringing. Following a trial in April 2012, the jury returned a verdict finding that Fairchild infringes two of the Company’s patents, that Fairchild has induced others to infringe the Company’s patents, and also upheld the validity of the infringed patents. Of the two remaining counterclaim patents Fairchild asserted in the case, one was found not to be infringed, but the jury found the second patent to be infringed by a limited number of the Company’s products, although the jury further found the Company did not induce infringement by any customers, including customers outside the United States. On March 29, 2013, the District Court denied most of the parties’ post-trial motions on liability but granted the Company’s motion for judgment as a matter of law finding that Fairchild infringed another of the Company’s patents. On April 25, 2013, the Court denied both parties’ motions regarding the unenforceability of each other’s patents. The Company is challenging adverse findings on appeal; nevertheless, the Company estimates that even if the verdict on Fairchild’s patent were ultimately upheld, the sales potentially impacted would amount to less than 0.5% of the Company’s revenues. The Company requested an injunction preventing further infringement of its own patents by Fairchild, and Fairchild requested an injunction as well. Following a hearing on the issue in June 2014, the Court denied Fairchild’s request for an injunction against the Company and granted the Company’s request for an injunction against Fairchild. On January 13, 2015, the District Court entered final judgment on the liability and validity issues discussed above, and both parties filed appeals with the Federal Circuit. Briefing on the appeal has been completed, and oral argument on the appeal took place in early July 2016, with rulings expected in the coming months. The Company is also seeking financial damages, as well as enhanced damages for willful infringement; these issues are to be decided in separate proceedings at a later date.

On June 28, 2004, the Company filed a complaint for patent infringement in the U.S. District Court, Northern District of California, against SG Corporation, a Taiwanese company, and its U.S. subsidiary. The Company’s complaint alleged that certain integrated circuits produced by SG infringed and continue to infringe certain of its patents. On June 10, 2005, in response to the initiation of the International Trade Commission (ITC) investigation discussed above, the District Court stayed all proceedings. Subsequent to the completion of the ITC proceedings, the District Court temporarily lifted the stay and scheduled a case management conference. On December 6, 2006, SG filed a notice of appeal of the ITC decision as discussed above. In response, and by agreement of the parties, the District Court vacated the scheduled case management conference and renewed the stay of proceedings pending the outcome of the Federal Circuit appeal of the ITC determination. On November 19, 2007, the Federal Circuit affirmed the ITC’s findings in all respects, and SG did not file a petition for review. The parties subsequently filed a motion to dismiss the District Court case without prejudice. On November 4, 2009, the Company re-filed its complaint for patent infringement against SG and its parent corporations, Fairchild Semiconductor International, Inc. and Fairchild Semiconductor Corporation, to address their continued infringement of patents at issue in the original suit that recently emerged from SG requested reexamination proceedings before the U.S. Patent and Trademark Office (USPTO). The Company seeks, among other things, an order enjoining SG and Fairchild from infringing the Company’s patents and an award of damages resulting from the alleged infringement. Fairchild has

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NOTES TO UNAUDITED CONDENSED CONSOLIDATED FINANCIAL STATEMENTS (Continued)

denied infringement and asked for a declaration from the Court that it does not infringe any Power Integrations patent, that the patents are invalid, and that one of the two of the Company’s patents now at issue in the case is unenforceable. On May 5, 2010, SG and Fairchild filed an amended answer including counterclaims accusing the Company of infringing two patents, and since that time Fairchild has withdrawn its claim for infringement of one of the patents it originally asserted against the Company but added another patent to the case over the Company’s objections; the Company contests these claims vigorously. Both parties filed summary judgment motions and challenges to each other’s experts’ testimony, and the Court granted the Company’s motion for summary judgment of non-infringement with respect to one of Fairchild’s two patents. Following a trial on the remaining claims in February 2014, the jury returned a verdict in the Company’s favor, affirming the validity of the asserted claims of the Company’s patents-in-suit, finding that SG and Fairchild infringed the Company’s asserted patents and induced infringement by others, and awarding $105.0 million in damages. The Jury also rejected Fairchild’s remaining counterclaims for infringement against the Company. Fairchild challenged these rulings in post-trial motions, but the judge confirmed the jury’s determinations on infringement and damages, although the Court declined to find Fairchild’s infringement willful. Fairchild also pressed its unenforceability claim with respect to one of the two patents it was found to infringe in post-trial briefing, but the Court rejected Fairchild’s unenforceability claim. Fairchild also requested reconsideration of the damages determinations, and the Court granted a new trial with respect to damages but none of the other issues addressed in the previous trial, with the retrial scheduled for December 2015. Thereafter, the parties completed pretrial proceedings challenging each other’s experts, and the Court granted portions of each party’s motions limiting the scope of expert testimony for purposes of the damages retrial, but neither party was successful in their efforts to prevent the other side’s experts from testifying at trial. Following a retrial on the issue of damages in December 2015, the jury returned a verdict in the Company’s favor, finding that the Company’s patented technology created the basis for customer demand for the infringing Fairchild products and awarding $139.8 million in damages. Although the jury awarded damages, at this stage of the proceedings the Company cannot state the amount, if any, it might ultimately recover from Fairchild, and no benefits have been recorded in the Company’s consolidated financial statements as a result of the damages verdict. The Company has filed a motion requesting enhanced damages and attorney fees; Fairchild has also filed a post-trial motion to challenge the verdict. The Court held an initial hearing on the parties’ post-trial motions in June 2016; additional briefing and argument on post-trial motions are expected to continue over the coming months.

In February 2010, Fairchild and System General (SG) filed suits for patent infringement against the Company, Power Integrations Netherlands B.V., and representative offices of Power Integrations Netherlands in Shanghai and Shenzhen with the Suzhou Intermediate Court in the People’s Republic of China. The suits asserted four Chinese patents and sought an injunction and damages of approximately $19.0 million. Power Integrations Netherlands filed invalidation proceedings for all four asserted SG patents in the People’s Republic of China Patent Reexamination Board (PRB) of the State Intellectual Property Office (SIPO), and all four challenges were accepted by the PRB, with hearings conducted in September 2010. In early January 2012, the Company received rulings from the PRB invalidating the majority of the claims Fairchild asserted in litigation. The Suzhou Court conducted evidentiary hearings in 2012 and issued rulings in late December 2012, finding that the Company did not infringe any of the asserted patents. Fairchild filed appeals challenging the Suzhou Court’s non-infringement rulings, and the appeals court in Nanjing held further hearings in the infringement proceedings in late 2014, but Fairchild has since dismissed its appeals, bringing the infringement proceedings to a close in the first quarter of 2015.

On July 11, 2011, the Company filed a complaint in the U.S. District Court, District of Columbia, against David Kappos in his capacity as Director of the United States Patent and Trademark Office (PTO) as part of the ongoing reexamination proceedings related to one of the patents asserted against Fairchild and SG in the Delaware litigation described above. The Company filed a motion for summary judgment on a preliminary jurisdictional issue, and the PTO filed a cross-motion to dismiss on this same issue; briefing on those motions was completed in October, 2011. On November 18, 2013, the Court granted the PTO’s motion and transferred the case to the Federal Circuit, where additional briefing took place. Following a hearing in May 2015, the Federal Circuit ruled in the Company’s favor on August 12, 2015, overturning the PTO’s claim construction and remanding the case for further proceedings.

On May 1, 2012, Fairchild Semiconductor Corporation and Fairchild's wholly owned subsidiary, System General Corporation (referred to collectively as “Fairchild”), filed a complaint against the Company in the United States District Court for the District of Delaware. In its complaint, Fairchild alleged that the Company has infringed and is infringing four patents pertaining to power conversion integrated circuit devices. The Company answered Fairchild’s complaint, denying infringement and asking for a declaration from the Court that it does not infringe any Fairchild patent and that the Fairchild patents are invalid, and the Company also asserted counterclaims against Fairchild for infringement of five of the Company’s patents. Fairchild has withdrawn its claim for infringement of one of the patents it asserted against the Company after the Company’s preliminary challenge. The parties streamlined their contentions in view of the Court’s pretrial rulings, and following a trial in late May and early June 2015,

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POWER INTEGRATIONS, INC.

NOTES TO UNAUDITED CONDENSED CONSOLIDATED FINANCIAL STATEMENTS (Continued)

a jury returned a verdict finding that Fairchild infringed one of the Company’s patents, that Fairchild has induced and contributed to others’ infringement of the Company’s patent, and that the Company induced infringement of a Fairchild patent that was previously found infringed in the 2012 trial described above, with a damages award of $2.4 million in favor of Fairchild. Both parties filed post-trial motions and challenges to various portions of the jury verdicts, and the Court has addressed the first wave of post-trial motions, denying each side’s challenges to the verdict, with further post-trial briefing on Fairchild’s requests for an injunction and attorneys’ fees expected to continue over the coming months. However, in parallel proceedings the Patent Office has rejected all of the asserted claims of the one Fairchild patent found infringed, determinations that Fairchild is challenging on appeal, and the Court rejected Fairchild’s earlier request for an injunction based on those same claims. The Company believes it has valid defenses against the $2.4 million award in favor of Fairchild, and therefore has not recorded a loss in its financial statements at this time.

On October 21, 2015, the Company filed a complaint for patent infringement against Fairchild Semiconductor Corporation, Fairchild Semiconductor International, Inc., and wholly-owned subsidiary Fairchild (Taiwan) Corporation (referred to collectively as “Fairchild”) to address Fairchild’s continued infringement of two patents Fairchild was previously found to infringe in the three District Court cases the Company brought against Fairchild discussed above. In each of the three prior cases, Fairchild was found to infringe one of the patents at issue in the latest complaint, and Fairchild’s challenges to the validity of the patents were rejected during the course of the prior lawsuits as well. Fairchild has answered the Company’s complaint, denying infringement and asking for a declaration from the Court that it does not infringe any Power Integrations patent and that the patents are invalid. Fairchild’s answer also included counterclaims accusing the Company of infringing four patents pertaining to power conversion integrated circuit devices, including one patent the Company was found not to infringe in prior litigation. The Company has answered Fairchild’s counterclaims, denying infringement and asking for a declaration from the Court that it does not infringe any Fairchild patent and that the Fairchild patents are invalid. No trial date has been scheduled, but further proceedings are expected over the course of the coming months.

On March 10, 2016, Silver Star Capital, LLC filed a petition with the U.S. Patent & Trademark Office (PTO) requesting that the PTO conduct an inter partes review (IPR) of the validity of the Company’s U.S. Patent No. 6,212,079 (the ’079 patent), which the Company has asserted against Fairchild Semiconductor in the California litigation initiated in 2004, as discussed above. The Company’s ’079 patent is also asserted in the Company’s most recent lawsuit against Fairchild filed in October 2015, also discussed above. On March 29, 2016, ON Semiconductor Corporation filed another petition requesting inter partes review of the Company’s ’079 patent. The Company has filed its preliminary response to both Silver Star Capital and On Semiconductor’s IPR petitions directed to the ’079 patent. On May 2, 2016, ON Semiconductor Corporation filed another petition requesting inter partes review of the validity of the Company’s U.S. Patent No. 6,538,908 (the ’908 patent), which the Company has also asserted against Fairchild Semiconductor in the California litigation initiated in 2004, as discussed above. The PTO has not acted on any of these IPR petitions at this time but is expected to do so later this year. Although the validity of the ’079 and ’098 patents has previously been confirmed in two prior PTO reexamination proceedings and in the Company’s District Court litigation with Fairchild, and though the Company intends to vigorously defend the validity of the ’079 and ’098 patents, the outcome of the IPR proceedings is uncertain.

On April 1, 2016, Opticurrent, LLC filed a complaint against the Company in the United States District Court for the Eastern District of Texas. In its complaint, Opticurrent alleges that the Company has infringed and is infringing one patent pertaining to transistor switch devices. The Company has filed a motion to dismiss to Opticurrent’s complaint, but the Court has not ruled on the motion, and further proceedings and discovery are expected over the course of the coming months, with trial currently scheduled for October 2017. The Company intends to vigorously defend itself against Opticurrent’s claims.

The Company is unable to predict the outcome of legal proceedings with certainty, and there can be no assurance that Power Integrations will prevail in the above-mentioned unsettled litigations. These litigations, whether or not determined in Power Integrations’ favor or settled, will be costly and will divert the efforts and attention of the Company’s management and technical personnel from normal business operations, potentially causing a material adverse effect on the business, financial condition and operating results. Currently, the Company is not able to estimate a loss or a range of loss for the ongoing litigation disclosed above, however adverse determinations in litigation could result in monetary losses, the loss of proprietary rights, subject the Company to significant liabilities, require Power Integrations to seek licenses from third parties or prevent the Company from licensing the technology, any of which could have a material adverse effect on the Company’s business, financial condition and operating results.

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POWER INTEGRATIONS, INC.

NOTES TO UNAUDITED CONDENSED CONSOLIDATED FINANCIAL STATEMENTS (Continued)

13. INDEMNIFICATIONS:

The Company sells products to its distributors under contracts, collectively referred to as Distributor Sales Agreements (“DSA”). Each DSA contains the relevant terms of the contractual arrangement with the distributor, and generally includes certain provisions for indemnifying the distributor against losses, expenses, and liabilities from damages that may be awarded against the distributor in the event the Company's products are found to infringe upon a patent, copyright, trademark, or other proprietary right of a third party (“Customer Indemnification”). The DSA generally limits the scope of and remedies for the Customer Indemnification obligations in a variety of industry-standard respects, including, but not limited to, limitations based on time and geography, and a right to replace an infringing product. The Company also, from time to time, has granted a specific indemnification right to individual customers.

The Company believes its internal development processes and other policies and practices limit its exposure related to such indemnifications. In addition, the Company requires its employees to sign a proprietary information and inventions agreement, which assigns the rights to its employees' development work to the Company. To date, the Company has not had to reimburse any of its distributors or customers for any losses related to these indemnifications and no material claims were outstanding as of June 30, 2016. For several reasons, including the lack of prior indemnification claims and the lack of a monetary liability limit for certain infringement cases, the Company cannot determine the maximum amount of potential future payments, if any, related to such indemnifications.

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ITEM 2. MANAGEMENT’S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND RESULTS OF OPERATIONS

The following discussion and analysis of our financial condition and results of operations should be read in conjunction with the condensed consolidated financial statements and the notes to those statements included elsewhere in this Quarterly Report on Form 10-Q, and with the consolidated financial statements and management’s discussion and analysis of our financial condition and results of operations in our Annual Report on Form 10-K for the year ended December 31, 2015, filed with the SEC on February 11, 2016. This discussion contains forward-looking statements that involve risks and uncertainties. Our actual results could differ materially from those contained in these forward-looking statements due to a number of factors, including those discussed under the caption “Risk Factors” in our Annual Report on Form 10-K for the year ended December 31, 2015, and in Part II, Item 1A-“Risk Factors” and elsewhere in this report. See also “Cautionary Note Regarding Forward-Looking Statements” at the beginning of this report.

Overview

We design, develop and market analog and mixed-signal integrated circuits (ICs) and other electronic components and circuitry used in high-voltage power conversion. Our products are used in power converters that convert electricity from a high-voltage source (typically 48 volts or higher) to the type of power required for a specified downstream use. In most cases, this conversion entails, among other functions, converting alternating current (AC) to direct current (DC) or vice versa, reducing or increasing the voltage, and regulating the output voltage and/or current according to the customer’s specifications.

A large percentage of our products are ICs used in AC-DC power supplies, which convert the high-voltage AC from a wall outlet to the low-voltage DC required by most electronic devices. Power supplies incorporating our products are used with all manner of electronic products including mobile phones, computers, entertainment and networking equipment, appliances, electronic utility meters, industrial controls and lights that utilize light-emitting diodes (LEDs) rather than incandescent or fluorescent light sources.

    By virtue of our May 2012 acquisition of CT-Concept Technologie AG (Concept), we also offer insulated-gate bipolar transistor (IGBT) drivers – circuit boards containing ICs, electrical isolation components and other circuitry – used to operate arrays of high-voltage transistors. These arrays, known as IGBT modules, are used for power conversion in high-power applications (i.e., power levels ranging from a few kilowatts up to one gigawatt) such as industrial motors, solar- and wind-power systems, electric vehicles and high-voltage DC transmission systems.

Our products bring a number of important benefits to the power-conversion market compared with less advanced alternatives, including reduced component count and design complexity, smaller size, higher reliability and reduced time-to-market. Our products also improve the energy efficiency of power converters, helping our customers meet the increasingly stringent efficiency standards that have been adopted around the world for many electronic products, and improving the efficacy of renewable-energy systems, electric vehicles and other high-power applications.

While the size of our addressable market fluctuates with changes in macroeconomic conditions, the market has generally exhibited only a modest growth rate over time as growth in the unit volumes of power converters has largely been offset by reductions in the average selling price of components in this market. Therefore, the growth of our business depends primarily on our penetration of the addressable market, and our success in expanding the addressable market by introducing new products that address a wider range of applications. Our growth strategy includes the following elements:

• Increase the penetration of our ICs in the “low-power” market. The largest proportion of our revenues comes from power-supply applications requiring 500 watts of output or less. We continue to introduce more advanced products that make our IC-based solutions more attractive in this market. We have also increased the size of our sales and field-engineering staff considerably in recent years, and we continue to expand our offerings of technical documentation and design-support tools and services to help customers use our ICs. These tools and services include our PI Expert™ design software, which we offer free of charge, and our transformer-sample service.

• Increase the penetration of our products and the size of our market opportunity in “high-power” applications. By virtue of our acquisition of Concept in 2012, we are now able to bring the benefits of integration to higher-power applications (up to one gigawatt). In particular, we sell our IGBT-driver products into applications such as industrial motor drives, renewable energy systems, DC transmission systems and electric vehicles. We seek to further expand the size of our market opportunity in the future by introducing new IGBT-driver products that will enable us to serve a wider range of power levels in the high-power market.

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• Capitalize on the growing demand for more energy-efficient electronic products and lighting technologies, and for cleaner energy and transportation technologies. We believe that energy-efficiency is becoming an increasingly important design criterion for power supplies due largely to the emergence of standards and specifications that encourage, and in some cases mandate, the design of more energy-efficient electronic products. For example, in 2008 the U.S. Department of Energy implemented mandatory federal standards governing the efficiency of external power supplies; these standards have been tightened as of early 2016. Power supplies incorporating our ICs are generally able to comply with all known efficiency specifications currently in effect, including these tighter U.S. standards.

Additionally, technological advances combined with regulatory and legislative actions are resulting in the adoption of alternative lighting technologies such as LEDs. We believe this presents a significant opportunity for us because our ICs are used in driver (i.e., power-supply) circuitry for high-voltage LED lighting applications. Finally, the growing desire for less carbon-intensive sources of energy and modes of transportation represents an opportunity for us since our IGBT drivers are used in renewable-energy systems as well as electric trains and other electric vehicles.

Our quarterly operating results are difficult to predict and subject to significant fluctuations. We plan our production and inventory levels based on internal forecasts of projected customer demand, which are highly unpredictable and can fluctuate substantially. Customers typically may cancel or reschedule orders on short notice without significant penalty and, conversely, often place orders with very short lead times to delivery. Also, external factors such as global economic conditions and supply-chain dynamics can cause our operating results to be volatile. Furthermore, because our industry is intensely price-sensitive, our gross margin (gross profit divided by net revenues) is subject to change based on the relative pricing of solutions that compete with ours. Variations in product mix, end-market mix and customer mix can also cause our gross margin to fluctuate. Because we purchase a large percentage of our silicon wafers from foundries located in Japan, our gross margin is influenced by fluctuations in the exchange rate between the U.S. dollar and the Japanese yen. Changes in the prices of raw materials used in our products, such as copper and gold, can also affect our gross margin. Although our wafer-fabrication and assembly operations are outsourced, as are most of our test operations, a portion of our production costs are fixed in nature. As a result, our unit costs and gross margin are impacted by the volume of units we produce.

Recent Results

Our net revenues were $97.2 million and $85.3 million in the three months ended June 30, 2016 and 2015, respectively, and $182.5 million and $167.8 million in the six months ended June 30, 2016 and 2015, respectively. The increase in revenues was due primarily to higher unit sales into the communications end-market, largely as a result of the success of our InnoSwitch products in mobile-device chargers, and into the consumer market, particularly the consumer-appliance market. The increase was partially offset by lower unit sales into the computer end-market, reflecting reduced demand for power supplies for desktop computers.

Our top ten customers, including distributors that resell to original equipment manufacturers (OEMs) and merchant power supply manufacturers, accounted for 63% and 62% of our net revenues in the three months ended June 30, 2016 and 2015, respectively, and 62% and 60% in the six months ended June 30, 2016 and 2015, respectively. Our top customer, a distributor of our products, accounted for approximately 19% and 20% of our net revenues in the three and six months ended June 30, 2016, respectively, and 22% in each of the three and six months ended June 30, 2015. International sales accounted for 96% of our net revenues in each of the three and six months ended June 30, 2016, and 95% of our net revenues in each of the three and six months ended June 30, 2015.

Our gross margin was 49% and 52% in the three months ended June 30, 2016 and 2015, respectively, and 50% and 51% in the six months ended June 30, 2016 and 2015, respectively. The decrease in gross margin for the three and six months ended June 30, 2016, as compared with the same periods in the prior year was due primarily to an unfavorable change in end-market mix, with a greater percentage of revenue coming from lower-margin end markets.

Total operating expenses were $36.0 million and $34.8 million in the three months ended June 30, 2016 and 2015, respectively, and $70.0 million and $70.1 million in the six months ended June 30, 2016 and 2015, respectively. The increase for the three month period was due primarily to increased stock-based compensation expense related to annual performance-based awards (PSUs). Based on our financial performance in the first six months of 2016 and our expectations for the remainder of the year, we expect a greater number of 2016 PSUs to vest as compared to the 2015 PSUs. Total operating expenses for the six month period were essentially flat compared with the same period in the prior year as the increase in stock-based compensation expense was substantially offset by lower fees associated with patent litigation and decreased salary and related expenses reflecting rationalization of headcount following our 2015 acquisition of Cambridge Semiconductor Limited (CamSemi).

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Critical Accounting Policies and Estimates

The preparation of financial statements and related disclosures in conformity with accounting principles generally accepted in the United States of America (“U.S. GAAP”) requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosures of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenues and expenses during the reporting period. On an ongoing basis, we evaluate our estimates, including those listed below. We base our estimates on historical facts and various other assumptions that we believe to be reasonable at the time the estimates are made. Actual results could differ from those estimates.

Our critical accounting policies are as follows:

•revenue recognition;

•stock-based compensation;

•estimating write-downs for excess and obsolete inventory;

•income taxes;

•business combinations; and

•goodwill and intangible assets.

Our critical accounting policies are important to the portrayal of our financial condition and results of operations, and require us to make judgments and estimates about matters that are inherently uncertain. There have been no material changes to our critical accounting policies and estimates disclosed in “Item 7. Management’s Discussion and Analysis of Financial Condition and Results of Operations - Critical Accounting Policies and Estimates” and Note 2, Summary of Significant Accounting Policies, in each case in our Annual Report on Form 10-K for the year ended December 31, 2015, filed with the SEC on February 11, 2016.

Results of Operations

The following table sets forth certain operating data as a percentage of net revenues for the periods indicated.

	Three Months Ended June 30,				Six Months Ended June 30,
	2016		2015		2016		2015
Net revenues	100.0	%	100.0	%	100.0	%	100.0	%
Cost of revenues	51.0		48.4		50.4		48.6
Gross profit	49.0		51.6		49.6		51.4
Operating expenses:
Research and development	16.3		17.4		16.8		17.8
Sales and marketing	12.4		14.6		12.8		14.6
General and administrative	8.3		8.8		8.8		9.4
Total operating expenses	37.0		40.8		38.4		41.8
Income from operations	12.0		10.8		11.2		9.6
Other income (expense)	0.2		—		0.3		(0.1	)
Income before income taxes	12.2		10.8		11.5		9.5
Provision for income taxes	0.6		0.7		0.5		0.6
Net income	11.6	%	10.1	%	11.0	%	8.9	%

Comparison of the Three and Six Months Ended June 30, 2016 and 2015

Net revenues. Net revenues consist of revenues from product sales, which are calculated net of returns and allowances. Net revenues for the three and six months ended June 30, 2016, were $97.2 million and $182.5 million, respectively, and $85.3 million and $167.8 million, respectively, for the corresponding periods of 2015. The increase in revenues was due primarily to higher unit sales into the communications end-market, largely as a result of the success of our InnoSwitch products in mobile-

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device chargers, and into the consumer market, particularly the consumer-appliance market. The increase was partially offset by lower unit sales into the computer end-market, reflecting reduced demand for power supplies for desktop computers.

Our revenue mix by end market for the three and six month periods ended June 30, 2016, compared to the corresponding periods in 2015, was as follows:

	Three Months Ended June 30,				Six Months Ended June 30,
End Market	2016		2015		2016		2015
Communications	27	%	21	%	25	%	21	%
Computer	6	%	7	%	6	%	7	%
Consumer	35	%	36	%	37	%	37	%
Industrial	32	%	36	%	32	%	35	%

International sales, consisting of sales outside of the United States based on “ship to” customer locations, were $93.6 million and $175.4 million in the three and six months ended June 30, 2016, respectively, and $81.3 million and $160.2 million, respectively, in the corresponding periods of 2015. Although power converters using our products are distributed to end markets worldwide, most are manufactured in Asia. As a result, sales to this region represented 81% and 80%, respectively, of our net revenues in the three and six months ended June 30, 2016 and 79% and 80% of our net revenues in the corresponding periods of 2015, respectively. We expect international sales, and sales to the Asia region in particular, to continue to account for a large portion of our net revenues in the future.

Sales to distributors accounted for 75% of net revenues in the both the three and six months ended June 30, 2016, and 78% and 77% in the corresponding periods of 2015, respectively. Direct sales to OEMs and power-supply manufacturers accounted for the remainder.

In the three and six months ended June 30, 2016, two customers, both distributors of our products, accounted for more than 10% of our net revenues. In the three and six months ended June 30, 2015, one customer, also a distributor, accounted for more than 10% of net revenues.

The following table discloses these customers’ percentage of revenues for the respective periods:

	Three Months Ended June 30,				Six Months Ended June 30,
Customer	2016		2015		2016		2015
Avnet	19	%	22	%	20	%	22	%
Powertech Distribution Ltd.	13	%	*		13	%	*

_______________                        

* Total customer percentage of revenues was less than 10%.

    No other customers accounted for 10% or more of our net revenues in these periods.

Gross profit. Gross profit is net revenues less cost of revenues. Our cost of revenues consists primarily of costs associated with the purchase of wafers from our contracted foundries, the assembly, packaging and testing of our products by sub-contractors, product testing performed in our own facilities, amortization of acquired intangible assets, and overhead associated with the management of our supply chain. Gross margin is gross profit divided by net revenues. The table below compares gross profit and gross margin for the three and six months ended June 30, 2016 and 2015:

	Three Months Ended June 30,						Six Months Ended June 30,
(dollars in millions)	2016			2015			2016			2015
Net revenues	$	97.2		$	85.3		$	182.5		$	167.8
Gross profit	$	47.6		$	44.0		$	90.6		$	86.3
Gross margin	49.0		%	51.6		%	49.6		%	51.4		%

The decrease in gross margin for the three and six months ended June 30, 2016, compared with the same periods in the prior year, was due primarily to an unfavorable change in end-market mix, with a greater percentage of revenues coming from lower-margin end-markets.

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Research and development expenses. Research and development (“R&D”) expenses consist primarily of employee-related expenses, including stock-based compensation, and expensed material and facility costs associated with the development of new technologies and new products. We also record R&D expenses for prototype wafers related to new products until such products are released to production. The table below compares R&D expenses for the three and six months ended June 30, 2016 and 2015:

	Three Months Ended June 30,						Six Months Ended June 30,
(dollars in millions)	2016			2015			2016			2015
Net revenues	$	97.2		$	85.3		$	182.5		$	167.8
R&D expenses	$	15.9		$	14.9		$	30.6		$	29.8
R&D expenses as a % of net revenue	16.3		%	17.4		%	16.8		%	17.8		%

R&D expenses increased in the three and six months ended June 30, 2016, as compared to the same periods in 2015. The increase is primarily due to increased stock-based compensation expense related to performance-based stock awards expected to vest as a result of our 2016 performance and expectations for the remainder of the year. In addition, engineering equipment expenses increased in support of our product-development efforts.

Sales and marketing expenses. Sales and marketing (“S&M”) expenses consist primarily of employee-related expenses, including stock-based compensation, commissions to sales representatives, amortization of intangible assets and facilities expenses, including expenses associated with our regional sales and support offices. The table below compares S&M expenses for the three and six months ended June 30, 2016 and 2015:

	Three Months Ended June 30,						Six Months Ended June 30,
(dollars in millions)	2016			2015			2016			2015
Net revenues	$	97.2		$	85.3		$	182.5		$	167.8
S&M expenses	$	12.0		$	12.5		$	23.4		$	24.6
S&M expenses as a % of net revenue	12.4		%	14.6		%	12.8		%	14.6		%

S&M expenses decreased in the three and six months ended June 30, 2016, compared to the same periods in 2015, due primarily to lower salary and related expenses reflecting rationalization of headcount following our 2015 acquisition of CamSemi, partially offset by higher sales commissions.

General and administrative expenses. General and administrative (“G&A”) expenses consist primarily of employee-related expenses, including stock-based compensation expenses, for administration, finance, human resources and general management, as well as consulting, professional services, legal and audit expenses. The table below compares G&A expenses for the three and six months ended June 30, 2016 and 2015:

	Three Months Ended June 30,						Six Months Ended June 30,
(dollars in millions)	2016			2015			2016			2015
Net revenues	$	97.2		$	85.3		$	182.5		$	167.8
G&A expenses	$	8.1		$	7.5		$	16.0		$	15.8
G&A expenses as a % of net revenue	8.3		%	8.8		%	8.8		%	9.4		%

G&A expenses increased in the three and six months ended June 30, 2016, compared to the same periods in 2015. The increase was due primarily to increased stock-based compensation expense related to annual performance-based awards (PSUs). Based on our financial performance in the first six months of 2016 and our expectations for the remainder of the year, we expect a greater number of 2016 PSUs to vest as compared to the 2015 PSUs. The increase in stock-based compensation expense for the six month period was substantially offset by a decrease in legal expenses as a result of lower fees associated with our Fairchild patent litigation.

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Other income (expense). Other income (expense) consists primarily of interest income earned on cash and cash equivalents, marketable securities and other investments, and foreign exchange gains or losses. The table below compares other income (expense) for the three and six months ended June 30, 2016 and 2015:

	Three Months Ended June 30,						Six Months Ended June 30,
(dollars in millions)	2016			2015			2016			2015
Net revenues	$	97.2		$	85.3		$	182.5		$	167.8
Other income (expense)	$	0.2		$	—		$	0.5		$	(0.2	)
Other income (expense) as a % of net revenue	0.2		%	—		%	0.3		%	(0.1		)%

Other income (expense), net increased in the three and six months ended June 30, 2016, compared to the same periods in 2015 due primarily to the unfavorable impact of foreign currency movements relative to the U.S. dollar and the related loss recognized from the re-measurement of monetary foreign currency assets and liabilities of our Swiss subsidiary in 2015.

Provision for income taxes. Provision for income taxes represents federal, state and foreign taxes. The table below compares income-tax expense for the three and six months ended June 30, 2016 and 2015:

	Three Months Ended June 30,						Six Months Ended June 30,
(dollars in millions)	2016			2015			2016			2015
Income before income taxes	$	11.9		$	9.2		$	21.0		$	16.0
Provision for income taxes	$	0.6		$	0.6		$	0.9		$	1.0
Effective tax rate	5.0		%	6.8		%	4.4		%	6.4		%

Our effective tax rates for the three and six months ended June 30, 2016, were 5.0% and 4.4%, respectively. In the three and six months ended June 30, 2016, the effective tax rates were lower than the statutory federal income-tax rate of 35% primarily due to the beneficial impact of the geographic distribution of our world-wide earnings and the federal research and development tax credit which was permanently extended in December 2015. In the three and six months ended June 30, 2015, the effective tax rates were lower than the statutory federal income-tax rate of 35% primarily due to the beneficial impact of the geographic distribution of our world-wide earnings.

Liquidity and Capital Resources

As of June 30, 2016, we had $202.2 million in cash, cash equivalents and short-term marketable securities, an increase of approximately $28.3 million from $173.9 million as of December 31, 2015. As of June 30, 2016, we had working capital, defined as current assets less current liabilities, of $215.0 million, an increase of approximately $26.6 million from $188.4 million as of December 31, 2015.

On July 5, 2012, we entered into a credit agreement (the "Credit Agreement") with two banks. The Credit Agreement provides us with a $100.0 million revolving line of credit to use for general corporate purposes with a $20.0 million sub-limit for the issuance of standby and trade letters of credit. The Credit Agreement was amended on April 1, 2014, to extend the Credit Agreement termination date from July 5, 2015 to April 1, 2017, with all other terms of the Credit Agreement remaining the same. Our ability to borrow under the revolving line of credit is conditioned upon our compliance with specified covenants, primarily a minimum cash requirement and a debt-to-earnings ratio, with which we are currently in compliance. The Credit Agreement terminates on April 1, 2017, and all advances under the revolving line of credit will become due on such date, or earlier in the event of a default. As of June 30, 2016, we had no amounts outstanding under our agreement.

On July 27, 2016, we terminated the Credit Agreement and entered into a new Credit Agreement with a bank (the "New Credit Agreement"). The New Credit Agreement provides us with a $75.0 million revolving line of credit to use for general corporate purposes with a $20.0 million sub-limit for the issuance of standby and trade letters of credit. Our ability to borrow under the revolving line of credit is conditioned upon our compliance with specified covenants, including reporting and financial covenants, primarily a minimum liquidity measure and a debt to earnings ratio, with which we are currently in compliance. The New Credit Agreement terminates on July 26, 2019; all advances under the revolving line of credit will become due on such date, or earlier in the event of a default.

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Operating activities generated cash of $43.9 million in the six months ended June 30, 2016. Net income for this period was $20.1 million; we also incurred non-cash depreciation, amortization and stock-based compensation expenses of $8.5 million, $3.4 million and $9.4 million, respectively. Sources of cash also included a $5.2 million decrease in inventories due to greater then expected sales, a $3.0 million increase in accounts payable due primarily to the timing of payments and a $1.8 million increase in deferred income on sales to distributors due to increased inventory levels at our distributors in anticipation of end-customer demand. These sources of cash were partially offset by a $6.4 million increase in accounts receivable due to increased shipments and a $1.6 million decrease in taxes payable due to taxes paid during the period.

Operating activities generated cash of $42.7 million in the six months ended June 30, 2015. Net income for this period was $14.9 million; we also incurred non-cash depreciation, amortization and stock-based compensation expenses of $8.1 million, $3.5 million and $8.1 million, respectively. Significant changes in assets and liabilities included a $6.3 million increase in accounts payable due to the timing of payments, a $1.9 million decrease in prepaid expenses and other assets due primarily to a decrease in prepaid legal fees, a $1.2 million increase in deferred income on sales to distributors due to increased inventory levels at our distributors and a $1.2 million decrease in inventories due to ongoing inventory optimization. These increases in cash were partially offset by a $1.8 million decrease in accrued liabilities due to lower accrued professional fees and a $1.0 million increase in accounts receivable due primarily to the timing of shipments at June 30, 2016, compared to December 31, 2015.

Our investing activities in the six months ended June 30, 2016, resulted in an $18.2 million net use of cash, consisting of $13.3 million for purchases of marketable securities, net of maturities, and $4.9 million for purchases of property and equipment, primarily production-related machinery and equipment. Our investing activities in the six months ended June 30, 2015, resulted in a $1.7 million net use of cash, consisting of $15.5 million in net cash paid for the acquisition of CamSemi and $5.1 million for purchases of property and equipment, primarily machinery and equipment for production. These uses of cash were partially offset by $19.0 million of proceeds from the sale and maturity of marketable securities, net of purchases.

Our financing activities in the six months ended June 30, 2016, resulted in a $10.5 million net use of cash. Financing activities consisted of $7.5 million for the payment of dividends to stockholders and $6.4 million for the repurchase of our common stock, partially offset by proceeds of $3.4 million from the issuance of common stock, including the exercise of employee stock options and the issuance of shares through our employee stock purchase plan. Our financing activities in the six months ended June 30, 2015, resulted in a $25.8 million net use of cash. Financing activities consisted primarily of $23.2 million for the repurchase of our common stock and $7.0 million for the payment of dividends to stockholders, partially offset by proceeds of $4.4 million from the issuance of common stock, including the exercise of employee stock options and the issuance of shares through our employee stock purchase plan.

In January 2015, our board of directors declared four cash dividends in the amount of $0.12 per share to be paid to stockholders of record at the end of each quarter in 2015. We paid a total of $13.9 million in cash dividends in 2015. In January 2016, our board of directors declared four quarterly cash dividends in the amount of $0.13 per share to be paid to stockholders of record at the end of each quarter in 2016. Dividend payouts of approximately $3.7 million and $3.8 million occurred on March 31, 2016 and June 30, 2016, respectively. The declaration of any future cash dividend is at the discretion of the board of directors and will depend on our financial condition, results of operations, capital requirements, business conditions and other factors, as well as a determination that cash dividends are in the best interests of our stockholders.

In the year ended December 31, 2015, our board of directors authorized the use of $60.0 million for repurchase of our common stock, with repurchases to be executed according to pre-defined price/volume guidelines. In the six months ended June 30, 2016, we purchased approximately 146,000 shares for $6.4 million. As of June 30, 2016, we had approximately $23.6 million remaining in our repurchase program, which has no expiration date. Authorization of future repurchase programs is at the discretion of the board of directors and will depend on our financial condition, results of operations, capital requirements, business conditions and other factors.

As of June 30, 2016, we had a contractual obligation related to income tax, which consisted primarily of unrecognized tax benefits of approximately $15.1 million. A portion of the tax obligation is classified as long-term income taxes payable and a portion is recorded in deferred tax assets in our condensed consolidated balance sheet.

As of June 30, 2016, there were no material changes in our contractual commitments from those reported in our Annual Report on Form 10-K for the year ended December 31, 2015.

Our cash, cash equivalents and investment balances may change in future periods due to changes in our planned cash outlays, including changes in incremental costs such as direct and integration costs related to future acquisitions. We expect continued sales growth in our foreign business and plan to use the earnings generated by our foreign subsidiaries to continue to fund both the working capital and growth needs of our foreign entities, along with providing funding for any future foreign acquisitions. We do not provide for U.S. taxes on our undistributed earnings of foreign subsidiaries that we intend to invest

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indefinitely outside the U.S., unless such taxes are otherwise required under U.S. tax law. Beginning in 2013, we determined that a portion of our foreign subsidiaries current and future earnings may be remitted prospectively to the U.S. for domestic cash flow purposes and, accordingly, provided for the related U.S. taxes in our condensed consolidated financial statements. Currently the majority of our cash and marketable securities are held in the U.S. If we change our intent to invest our undistributed earnings outside the U.S. indefinitely or if a greater amount of undistributed earnings are needed for U.S. operations than previously anticipated and for which U.S. taxes have not been recorded, we would be required to accrue or pay U.S. taxes (subject to an adjustment for foreign tax credits, where applicable) and withholding taxes payable to various foreign countries on some or all of these undistributed earnings. As of December 31, 2015, we had undistributed earnings of foreign subsidiaries that are indefinitely invested outside of the U.S. of approximately $222.0 million.

If our operating results deteriorate during the remainder of 2016 as a result of a decrease in customer demand, pricing pressure, or other factors, our ability to generate positive cash flow from operations may be jeopardized. In that case, we may be forced to use our cash, cash equivalents and short-term investments, use our credit agreement or seek additional financing from third parties to fund our operations. We believe that cash generated from operations, together with existing sources of liquidity, will satisfy our projected working capital and other cash requirements for at least the next 12 months.

Off-Balance-Sheet Arrangements

As of June 30, 2016, we did not have any off-balance sheet arrangements or relationships with unconsolidated entities or financial partnerships, such as entities often referred to as structured finance or special purpose entities, which are typically established for the purpose of facilitating off-balance sheet arrangements or other contractually narrow or limited purposes.

Recent Accounting Pronouncements

Information with respect to this item may be found in Note 2, Significant Accounting Policies and Recent Accounting Pronouncements, in our Notes to Unaudited Condensed Consolidated Financial Statements included in Part I, Item 1, of this Quarterly Report on Form 10-Q, which information is incorporated herein by reference.

ITEM 3. QUANTITATIVE AND QUALITATIVE DISCLOSURES ABOUT MARKET RISK

There has not been a material change in our exposure to foreign currency exchange and interest rate risks from that described in our Annual Report on Form 10-K for the year ended December 31, 2015.

Interest Rate Risk. Our exposure to market risk for changes in interest rates relates primarily to our investment portfolio. We consider cash invested in highly liquid financial instruments with a remaining maturity of three months or less at the date of purchase to be cash equivalents. Investments in highly liquid financial instruments with maturities greater than three months at the date of purchase are classified as short-term investments. We generally hold securities until maturity; however, they may be sold under certain circumstances, including, but not limited to, when necessary for the funding of acquisitions and other strategic investments, and therefore we classify our investment portfolio as available-for-sale. We invest in high-credit quality issuers and, by policy, limit the amount of credit exposure to any one issuer. As stated in our policy, we seek to ensure the safety and preservation of our invested principal funds by limiting default risk, market risk and reinvestment risk. We mitigate default risk by investing in safe and high-credit quality securities and by constantly positioning our portfolio to respond appropriately to a significant reduction in a credit rating of any investment issuer, guarantor or depository. Our portfolio includes only marketable securities with active secondary or resale markets to facilitate portfolio liquidity. At June 30, 2016, and December 31, 2015, we held primarily cash equivalents and short-term investments with fixed interest rates.

Our investment securities are subject to market interest rate risk and will vary in value as market interest rates fluctuate. We monitor our investments per our above-mentioned investment policy; therefore, if market interest rates were to increase or decrease by 10% from interest rates as of June 30, 2016, or December 31, 2015, the increase or decrease in the fair market value of our portfolio on these dates would not have been material. We monitor our investments for impairment on a periodic basis. Refer to Note 5, Marketable Securities, in our Notes to Unaudited Condensed Consolidated Financial Statements, for a tabular presentation of our available-for-sale investments and the expected maturity dates.

Foreign Currency Exchange Risk. As of June 30, 2016, our primary transactional currency was U.S. dollars; in addition, we hold cash in Swiss francs and euro. We maintain cash denominated in Swiss francs and euro to fund the operations of our Swiss subsidiary. The foreign exchange rate fluctuation between the U.S. dollar versus the Swiss franc and euro is recorded in other income in our condensed consolidated statements of income.

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We have sales offices in various other foreign countries in which our expenses are denominated in the local currency, primary Asia and Western Europe. Cash balances held in foreign countries are subject to local banking laws and may bear higher or lower risk than cash deposited in the United States. From time to time we may enter into foreign currency hedging contracts to hedge certain foreign currency transactions. As of June 30, 2016, and December 31, 2015, we did not have an open foreign currency hedge program utilizing foreign currency forward exchange contracts.

Two of our major suppliers, Epson and Lapis, have wafer supply agreements based in U.S. dollars; however, our agreements with Epson and Lapis also allow for mutual sharing of the impact of the exchange rate fluctuation between Japanese yen and the U.S. dollar on future purchases. Each year, our management and these two suppliers review and negotiate future pricing; the negotiated pricing is denominated in U.S. dollars but is subject to contractual exchange rate provisions. The fluctuation in the exchange rate is shared equally between us and each of these suppliers on future purchases.

Nevertheless, as a result of our above-mentioned supplier agreements, our gross margin is influenced by fluctuations in the exchange rate between the U.S. dollar and the Japanese yen. All else being equal, a 10% change in the value of the U.S. dollar compared to the Japanese yen would result in a corresponding change in our gross margin of approximately 1.0%; this sensitivity may increase or decrease depending on the percentage of our wafer supply that we purchase from some of our Japanese suppliers and could subject our gross profit and operating results to the potential for material fluctuations.

ITEM 4. CONTROLS AND PROCEDURES

Limitation on Effectiveness of Controls

Any control system, no matter how well designed and operated, can provide only reasonable assurance as to the tested objectives. The design of any control system is based in part upon certain assumptions about the likelihood of future events, and there can be no assurance that any design will succeed in achieving its stated goals under all potential future conditions, regardless of how remote. The inherent limitations in any control system include the realities that judgments related to decision-making can be faulty, and that reduced effectiveness in controls can occur because of simple errors or mistakes. Due to the inherent limitations in a cost-effective control system, misstatements due to error may occur and may not be detected.

Evaluation of Disclosure Controls and Procedures

Management is required to evaluate our disclosure controls and procedures, as defined in Rule 13a-15(e) under the Securities Exchange Act of 1934 (the “Exchange Act”). Disclosure controls and procedures are controls and other procedures designed to provide reasonable assurance that information required to be disclosed in our reports filed under the Exchange Act, such as this Quarterly Report on Form 10-Q, is recorded, processed, summarized and reported within the time periods specified in the Securities and Exchange Commission’s rules and forms. Disclosure controls and procedures include controls and procedures designed to provide reasonable assurance that such information is accumulated and communicated to our management, including our Chief Executive Officer and Chief Financial Officer as appropriate to allow timely decisions regarding required disclosure. Based on our management’s evaluation (with the participation of our principal executive officer and principal financial officer), our principal executive officer and principal financial officer have concluded that our disclosure controls and procedures (as defined in Rules 13a-15(e) and 15d-15(e) under the Exchange Act) were effective as of the end of the period covered by this report.

Changes in Internal Control over Financial Reporting

There were no changes in our internal control over financial reporting during the quarter ended June 30, 2016, which were identified in connection with management’s evaluation required by paragraph (d) of Rules 13a-15 and 15d-15 under the Exchange Act, that have materially affected or are reasonably likely to materially affect our internal control over financial reporting.

PART II. OTHER INFORMATION

ITEM 1. LEGAL PROCEEDINGS

Information with respect to this item may be found in Note 12, Legal Proceedings and Contingencies, in our Notes to Unaudited Condensed Consolidated Financial Statements included in Part I, Item 1, of this Quarterly Report on Form 10-Q, which information is incorporated herein by reference.

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ITEM 1A. RISK FACTORS

As of the date of this filing, the risk factors have not changed substantively from those disclosed in Part 1 Item 1A in our Annual Report on Form 10-K for the year ended December 31, 2015, which risk factors are incorporated by reference in this report.

ITEM 2. UNREGISTERED SALES OF EQUITY SECURITIES AND USE OF PROCEEDS

In October 2015, our board of directors authorized the use of $30.0 million for the repurchase of our common stock, which was announced on October 28, 2015. As of December 31, 2015, we had $30.0 million available for future repurchases to be executed according to pre-defined price/volume guidelines. In the six months ended June 30, 2016, we purchased approximately 146,000 shares for $6.4 million. As of June 30, 2016, we had approximately $23.6 million remaining in our repurchase program, which has no expiration date.

ISSUER PURCHASES OF EQUITY SECURITIES

The following table summarizes repurchases of our common stock during the second quarter of fiscal 2016:

Period	Total Number of Shares Purchased	Average Price Paid Per Share		Total Number of Shares Purchased as Part of Publicly Announced Plans or Programs	Approximate Dollar Value of Shares that May Yet be Repurchased Under the Plans or Programs (in millions)
April 1, 2016, to April 30, 2016	5,000	$	45.02	5,000	$	23.7
May 1, 2016, to May 31, 2016	2,795	$	45.02	2,795	$	23.6
June 1, 2016, to June 30, 2016	—	$	—	—	$	23.6
Total	7,795			7,795

ITEM 5. OTHER INFORMATION

On July 27, 2016, Power Integrations, Inc., in connection with entering into a new Credit Agreement described below, terminated its Credit Agreement, dated as of July 5, 2012, as amended, by and between Power Integrations and Union Bank, N.A. and Wells Fargo Bank, National Association. The terminated Credit Agreement had provided Power Integrations with the ability to borrow up to $100 million.

On July 27, 2016, Power Integrations, Inc., and Wells Fargo Bank, National Association entered into a Credit Agreement, dated as of July 27, 2016, a copy of which is filed as Exhibit 10.1 to this Form 10-Q. The Credit Agreement provides Power Integrations with a $75.0 million revolving line of credit to use for general corporate purposes with a $20.0 million sublimit for the issuance of standby and trade letters of credit. Power Integrations' ability to borrow under the revolving line of credit is conditioned upon Power Integrations' compliance with specified covenants, including reporting and financial covenants. The Credit Agreement terminates on July 26, 2019; all advances under the revolving line of credit will become due on such date, or earlier in the event of a default. An event of default includes: the failure to pay any amounts owed under the Credit Agreement within seven days of the due date for such payment; failure to pay or perform any monetary obligation of Power Integrations in excess of $5.0 million; Power Integrations becomes insolvent or files for bankruptcy, or dissolves or liquidates; or a change of control of Power Integrations coupled with a removal or departure of Balu Balakrishnan as Chief Executive Officer.

ITEM 6. EXHIBITS

See the Exhibit Index immediately following the signature page to this Quarterly Report on Form 10-Q, which is incorporated by reference here.

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SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned thereunto duly authorized.

		POWER INTEGRATIONS, INC.
Dated:	July 29, 2016	By:	/s/ SANDEEP NAYYAR
			Sandeep Nayyar Chief Financial Officer (Duly Authorized Officer, Principal Financial Officer and Principal Accounting Officer)

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INDEX TO EXHIBITS

		Incorporation by Reference
EXHIBIT NUMBER	Exhibit Description	Form	File Number	Exhibit/Appendix Reference	Filing Date	Filed Herewith
3.1	Restated Certificate of Incorporation.	10-K	000-23441	3.1	2/29/2012
3.2	Amended and Restated Bylaws.	8-K	000-23441	3.1	4/26/2013
4.1	Reference is made to Exhibits 3.1 to 3.2.
10.1	Credit Agreement, dated July 27, 2016, by and between Power Integrations Inc. and Wells Fargo Bank, National Association					X
31.1	Certification of Chief Executive Officer pursuant to Section 302 of the Sarbanes-Oxley Act of 2002.					X
31.2	Certification of Chief Financial Officer pursuant to Section 302 of the Sarbanes-Oxley Act of 2002.					X
32.1**	Certification of Chief Executive Officer pursuant to Section 906 of the Sarbanes-Oxley Act of 2002.					X
32.2**	Certification of Chief Financial Officer pursuant to Section 906 of the Sarbanes-Oxley Act of 2002.					X
101.INS	XBRL Instance Document					X
101.SCH	XBRL Taxonomy Extension Schema Document					X
101.CAL	XBRL Taxonomy Extension Calculation Linkbase Document					X
101.DEF	XBRL Taxonomy Extension Definition Linkbase Document					X
101.LAB	XBRL Taxonomy Extension Label Linkbase Document					X
101.PRE	XBRL Taxonomy Extension Presentation Linkbase Document					X

All references in the table above to previously filed documents or descriptions are incorporating those documents and descriptions by reference thereto.

_____________

** The certifications attached as Exhibits 32.1 and 32.2 accompanying this Form 10-Q, are not deemed filed with the SEC, and are not to be incorporated by reference into any filing of Power Integrations, Inc. under the Securities Act of 1933, as amended, or the Securities Exchange Act of 1934, as amended, whether made before or after the date of this Form 10-Q, irrespective of any general incorporation language contained in such filing.

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EX-10.1

Exhibit 10.1

CREDIT AGREEMENT

THIS CREDIT AGREEMENT (this “Agreement”) is entered into as of July 27, 2016, by and between POWER INTEGRATIONS, INC., a Delaware corporation (“Borrower”), and WELLS FARGO BANK, NATIONAL ASSOCIATION (“Bank”).

RECITALS

Borrower has requested that Bank extend or continue credit to Borrower as described below, and Bank has agreed to provide such credit to Borrower on the terms and conditions contained herein.

NOW, THEREFORE, for valuable consideration, the receipt and sufficiency of which are hereby acknowledged, Bank and Borrower hereby agree as follows:

ARTICLE I

CREDIT TERMS

SECTION 1.1.LINE OF CREDIT.

(a)Line of Credit. Subject to the terms and conditions of this Agreement, Bank hereby agrees to make advances to Borrower from time to time up to and including July 26, 2019, in an aggregate principal amount not to exceed at any time outstanding Seventy-Five Million Dollars ($75,000,000) (“Line of Credit”), the proceeds of which shall be used to (i) refinance all indebtedness outstanding under that certain Credit Agreement, dated as of July 5, 2012 (as amended, restated, supplemented and/or modified from time to time, the “Existing Credit Agreement”), among Borrower, the lenders from time to time party thereto and Bank, as administrative agent on behalf of such lenders, and (ii) for Borrower’s general corporate purposes, including, but not limited to, stock buybacks and acquisitions. Borrower's obligation to repay advances under the Line of Credit shall be evidenced by a promissory note dated as of the date hereof, as modified from time to time (the “Line of Credit Note”), all terms of which are incorporated herein by this reference.

(b)Letter of Credit Subfeature. As a subfeature under the Line of Credit, Bank agrees from time to time during the term thereof to issue or cause an affiliate to issue standby and/or sight commercial letters of credit for the account of Borrower (each, a “Letter of Credit” and collectively, “Letters of Credit”); provided that the aggregate undrawn amount of all outstanding Letters of Credit shall not at any time exceed Twenty Million Dollars ($20,000,000). The form and substance of each Letter of Credit shall be subject to approval by Bank, in its sole discretion. No Letter of Credit shall have an expiration date subsequent to the maturity date of the Line of Credit. The undrawn amount of all Letters of Credit shall be reserved under the Line of Credit and shall not be available for borrowings thereunder. Each Letter of Credit shall be issued for a term not to exceed Three Hundred Sixty-Five (365) days, as designated by Borrower; provided that no Letter of Credit shall be issued with, nor shall Bank be required to renew or (if applicable) allow automatic renewal of any Letter of Credit so that it will have, an expiration date that is subsequent to the maturity date of the Line of Credit (with any such Letter of Credit with an expiration date subsequent to the maturity of the Line of Credit being referred to herein as an “Extended Date Letter of Credit”) unless Borrower, immediately upon demand by Bank at any time, and in any case not less than ninety (90) days prior to the maturity date of the Line of Credit, provides Bank with cash collateral (which may be in addition to or, if agreed by Bank, may be a replacement for, such other collateral that may have been granted by Borrower to Bank, pursuant to this Agreement or otherwise), consisting of a deposit account maintained by Borrower with Bank in an amount that is not less than one hundred five percent (105%) of the undrawn amount of such Extended Date Letter of Credit, as evidenced by and subject to such security agreements and other documents as Bank shall reasonably require, all in form and

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substance satisfactory to Bank; and provided further that in no event shall any Extended Date Letter of Credit have a then current expiration date more than three hundred sixty-five (365) days beyond the maturity date of the Line of Credit.

(c)Borrowing and Repayment. Borrower may from time to time during the term of the Line of Credit borrow, partially or wholly repay its outstanding borrowings, and reborrow, subject to all of the limitations, terms and conditions contained herein or in the Line of Credit Note; provided that the total outstanding borrowings under the Line of Credit shall not at any time exceed the maximum principal amount available thereunder, as set forth herein.

(d)Authorization by Borrower. Borrower hereby authorizes Bank: (i) to deduct automatically all principal, interest or fees when due hereunder or under any note from any account of Borrower maintained with Bank; and (ii) if and to the extent any payment of principal, interest or fees under this Agreement or any note is not made when due to deduct any such amount from any or all of the accounts of Borrower maintained with Bank. Bank agrees to provide written notice to Borrower of any automatic deduction made pursuant to this Section 1.1(d) showing in reasonable detail the amounts of such deduction.

SECTION 1.2.INTEREST/FEES.

(a)Interest. The outstanding principal balance of each credit subject hereto shall bear interest at the rate of interest set forth in each promissory note or other instrument or document executed in connection therewith.

(b)Computation and Payment. Interest shall be computed on the basis set forth in each promissory note or other instrument or document required hereby. Interest shall be payable at the times and place set forth in each promissory note or other instrument or document required hereby.

(c)Unused Fee. Borrower shall pay to Bank a fee equal to one-quarter of one percent (0.25%) per annum (computed on the basis of a 360-day year, actual days elapsed) on the amount by which Twenty-Eight Million Eight Hundred Thousand Dollars ($28,800,000) (the “Required Minimum Balance”) exceeds the sum of (i) Borrower’s average daily deposit balances at Bank plus (ii) the average daily outstanding amount under the Line of Credit, which fee shall be calculated on a quarterly basis by Bank and shall be due and payable by Borrower in arrears on the 10th day after each fiscal quarter end, commencing on October 10, 2016; provided that Borrower shall not owe any fee under this Section 1.2(c) for any fiscal quarter that Borrower maintains an average daily deposit balance with Bank equal to or in excess of the Required Minimum Balance for such fiscal quarter.

(d)Letter of Credit Fees. Borrower shall pay to Bank (i) fees upon the issuance of each Letter of Credit equal to one and one-quarter percent (1.25%) per annum (computed on the basis of a 360-day year, actual days elapsed) of the face amount thereof, and (ii) fees upon the payment or negotiation of each drawing under any Letter of Credit and fees upon the occurrence of any other activity with respect to any Letter of Credit (including without limitation, the transfer, amendment or cancellation of any Letter of Credit) determined in accordance with Bank's standard fees and charges then in effect for such activity.

SECTION 1.3.    COLLECTION OF PAYMENTS. Borrower authorizes Bank to collect all principal, interest and fees due under each credit subject hereto by debiting any deposit account of Borrower maintained with Bank for the full amount thereof. Should there be insufficient funds in any such deposit account to pay all such sums when due, the full amount of such deficiency shall be immediately due and payable by Borrower.

SECTION 1.4.GUARANTIES. The payment and performance of all indebtedness and other obligations of Borrower to Bank shall be guaranteed jointly and severally by any current or hereafter

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created or acquired domestic subsidiary of Borrower, as evidenced by and subject to the terms of guaranties in form and substance satisfactory to Bank.

SECTION 1.5.COMMITMENT TERMINATION. At any time (i) there is no outstanding principal balance or unpaid interest under the Line of Credit or the Letter of Credit subfeature described in Section 1.1(b) hereof, (ii) there are no issued and outstanding Letter(s) of Credit under the Letter of Credit subfeature or any outstanding obligations in respect of any Letter of Credit, and (iii) there are no other payment obligations of Borrower to Bank outstanding hereunder or under any other Loan Document, then Borrower, upon written notice to Bank, may request that the Line of Credit be terminated with no prepayment fees.

ARTICLE II

REPRESENTATIONS AND WARRANTIES

Borrower makes the following representations and warranties to Bank.

SECTION 2.1.LEGAL STATUS. Borrower is a corporation, duly organized and existing and in good standing under the laws of Delaware, and is qualified or licensed to do business (and is in good standing as a foreign corporation, if applicable) in all jurisdictions in which such qualification or licensing is required, except in those states in which the failure to so qualify or to be so licensed could not reasonably be expected to have a material adverse effect on Borrower.

SECTION 2.2.AUTHORIZATION AND VALIDITY. This Agreement and each promissory note, contract, instrument and other document required hereby or at any time hereafter delivered to Bank in connection herewith (collectively, the “Loan Documents”) have been duly authorized, and upon their execution and delivery in accordance with the provisions hereof will constitute legal, valid and binding agreements and obligations of Borrower or the party which executes the same, as applicable, enforceable in accordance with their respective terms.

SECTION 2.3.NO VIOLATION. The execution, delivery and performance by Borrower of each of the Loan Documents do not violate any provision of any law or regulation, or contravene any provision of the organizational and governing documents of Borrower, or result in any breach of or default under any contract, obligation, indenture or other instrument to which Borrower is a party or by which Borrower may be bound, except where such violation, contravention, breach or default would not reasonably be expected to have a material adverse effect on Borrower.

SECTION 2.4.LITIGATION. There are no pending, or to Borrower’s knowledge threatened in writing, actions, claims, investigations, suits or proceedings by or before any governmental authority, arbitrator, court or administrative agency involving more than One Million Dollars ($1,000,000) individually, or Ten Million Dollars ($10,000,000) in the aggregate, or which would reasonably be expected to have a material adverse effect on the financial condition or operation of Borrower other than those disclosed by Borrower to Bank in writing or in Borrower’s periodic and other reports, proxy statements and other materials filed with the SEC or distributed to its stockholders (the “SEC Filings”) prior to the date hereof. As used in this Agreement, “SEC” means the Securities and Exchange Commission, any entity succeeding to any or all of the functions of the Securities and Exchange Commission or any national securities exchange or analogous agency, authority, instrumentality, regulatory body, court or other entity.

SECTION 2.5.CORRECTNESS OF FINANCIAL STATEMENT. The annual financial statements of Borrower dated December 31, 2015, and all interim financial statements delivered to Bank since said date, true copies of which have been delivered by Borrower to Bank prior to the date hereof, (a) are complete and correct in all material respects and present fairly the financial condition of Borrower, (b) disclose all liabilities of Borrower that are required to be reflected or reserved against under generally accepted accounting principles, whether liquidated or unliquidated, fixed or contingent, and (c) have been

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prepared in accordance with generally accepted accounting principles consistently applied. Other than Permitted Liens, Borrower has not mortgaged, pledged, granted a security interest in or otherwise encumbered any of its assets or properties except in favor of Bank or as otherwise permitted by Bank in writing.

As used herein, the term “Permitted Liens” means (i) liens for taxes or other governmental or regulatory assessments which are not delinquent, or which are contested in good faith by the appropriate proceedings, and for which appropriate reserves are maintained in accordance with generally accepted accounting principles (“GAAP”); (ii) liens on any property held or acquired by Borrower securing indebtedness not to exceed the amounts set forth in Section 5.2(c) below incurred or assumed for the purpose of financing all or any part of the cost of acquiring such property or existing on such property when acquired; (iii) liens arising from judgments, decrees or attachments in circumstances not constituting an Event of Default (as hereinafter defined) (iv) liens and setoff rights in favor of other financial institutions arising in connection with Borrower’s deposit accounts held at such institutions, provided the existence of such accounts does not conflict with the provisions of Section 4.9(c) hereof, (v) liens incurred or deposits made in the ordinary course of business in connection with workers’ compensation, unemployment insurance and other types of social security, (vi) liens incurred or deposits made in the ordinary course of business with utility companies, (vii) liens incurred or deposits or pledges made to secure the performance of bids, tenders, contracts (other than contracts for the payment of money), public or statutory or regulatory obligations, surety, stay, appeal, indemnity, performance or other similar bonds, leases, government contracts, trade contracts, performance and return-of-money bonds and other similar obligations arising in the ordinary course of business (viii) materialmen’s, landlord’s, mechanics’, repairmen’s, workmen’s, employees’ or other like liens arising in the ordinary course of business, (ix) non-exclusive license of intellectual property granted to third parties in the ordinary course of business, and licenses of intellectual property that could not result in a legal transfer of title of the licensed property that may be exclusive in respects other than territory and that may be exclusive as to territory only as to discrete geographical areas outside of the United States, (x) liens on insurance proceeds in favor of insurance companies granted solely as security for financed premiums, (xi) easements, reservations, rights-of-way, minor defects or irregularities in title and other similar charges or encumbrances affecting real property, and (xii) any interest or title of a lessor or sub-lessor under any lease of real property in the ordinary course of business. Notwithstanding the foregoing, nothing contained herein shall prevent Borrower from selling, transferring, abandoning or otherwise disposing of intellectual property that is, in the reasonable judgment of the management of Borrower, no longer economically practicable to maintain or useful in the conduct of the business of Borrower.

SECTION 2.6.INCOME TAX RETURNS. Borrower has no knowledge of any pending assessments or adjustments of its income tax payable with respect to any year, except as disclosed in SEC reporting.

SECTION 2.7.NO SUBORDINATION. There is no agreement, indenture, contract or instrument to which Borrower is a party or by which Borrower may be bound that requires the subordination in right of payment of any of Borrower's obligations subject to this Agreement to any other obligation of Borrower.

SECTION 2.8.PERMITS, FRANCHISES. Borrower possesses, and will hereafter possess, all permits, consents, approvals, franchises and licenses required and rights to all trademarks, trade names, patents, and fictitious names, if any, necessary to enable it to conduct the business in which it is now engaged in compliance with applicable law.

SECTION 2.9.ERISA. Borrower is in compliance in all material respects with all applicable provisions of the Employee Retirement Income Security Act of 1974, as amended or recodified from time to time (“ERISA”); Borrower has not violated any provision of any defined employee pension benefit plan (as defined in ERISA) maintained or contributed to by Borrower (each, a “Plan”); no Reportable Event as defined in ERISA has occurred and is continuing with respect to any Plan initiated by Borrower; Borrower has met its minimum funding requirements under ERISA with respect to each Plan; and each Plan will be

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able to fulfill its benefit obligations as they come due in accordance with the Plan documents and under generally accepted accounting principles.

SECTION 2.10.OTHER OBLIGATIONS. Borrower is not in default on any obligation for borrowed money, any purchase money obligation or any other material lease, commitment, contract, instrument or obligation, in each case under any agreements involving monetary liability, which default or defaults result in a right by such third party or parties, whether or not exercised, to accelerate the maturity of any indebtedness in excess of Five Million Dollars ($5,000,000).

SECTION 2.11.ENVIRONMENTAL MATTERS. Except as disclosed by Borrower to Bank in writing prior to the date hereof, Borrower is in compliance in all material respects with all applicable federal or state environmental, hazardous waste, health and safety statutes, and any rules or regulations adopted pursuant thereto, which govern or affect any of Borrower's operations and/or properties, including without limitation, the Comprehensive Environmental Response, Compensation and Liability Act of 1980, the Superfund Amendments and Reauthorization Act of 1986, the Federal Resource Conservation and Recovery Act of 1976, and the Federal Toxic Substances Control Act, as any of the same may be amended, modified or supplemented from time to time. None of the operations of Borrower is the subject of any federal or state investigation evaluating whether any remedial action involving a material expenditure is needed to respond to a release of any toxic or hazardous waste or substance into the environment. Borrower has no material contingent liability in connection with any release of any toxic or hazardous waste or substance into the environment.

SECTION 2.12.MARGIN STOCK. Neither Borrower nor any subsidiary thereof is engaged principally or as one of its activities in the business of extending credit for the purpose of “purchasing” or “carrying” any “margin stock” (as each such term is defined or used, directly or indirectly, in Regulation U of the Board of Governors of the Federal Reserve System). No part of the proceeds of the Line of Credit or any Letter of Credit will be used for purchasing or carrying margin stock or for any purpose which violates, or which would be inconsistent with, the provisions of Regulation T, U or X of such Board of Governors. Following the application of the proceeds of the Line of Credit or Letter of Credit, not more than twenty-five percent (25%) of the value of the assets (either of Borrower only or of Borrowerand its subsidiaries on a consolidated basis) will constitute “margin stock.” If requested Bank, Borrower will furnish to Bank a statement to the foregoing effect in conformity with the requirements of FR Form G-3 or FR Form U 1 referred to in Regulation U.

ARTICLE III

CONDITIONS

SECTION 3.1.    CONDITIONS OF INITIAL EXTENSION OF CREDIT. The obligation of Bank to extend any credit contemplated by this Agreement is subject to the fulfillment to Bank's satisfaction of all of the following conditions:

(a)Approval of Bank Counsel. All legal matters incidental to the extension of credit by Bank shall be satisfactory to Bank's counsel.

(b)Documentation. Bank shall have received, in form and substance satisfactory to Bank, each of the following, duly executed:

(i) This Agreement and each promissory note or other instrument or document required hereby.

(ii) Corporate Resolutions and Certificate of Incumbency of Borrower.

(iii) Such other documents as Bank may require under any other Section of this Agreement.

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(c)Financial Condition. There shall have been no material adverse change, as determined by Bank, in the financial condition or business of Borrower or any Third Party Obligor hereunder, if any, nor any material decline, as determined by Bank, in the market value of any collateral required hereunder or a substantial or material portion of the assets of Borrower or any such Third Party Obligor, if any.

(d)Insurance. Borrower shall have delivered to Bank evidence of insurance coverage, in form, substance, amounts, covering risks and issued by companies satisfactory to Bank, and where required by Bank, with lender loss payable endorsements in favor of Bank.

SECTION 3.2.CONDITIONS OF EACH EXTENSION OF CREDIT. The obligation of Bank to make each extension of credit requested by Borrower hereunder shall be subject to the fulfillment to Bank's satisfaction of each of the following conditions:

(a)Compliance. The representations and warranties contained herein and in each of the other Loan Documents shall be true on and as of the date of the signing of this Agreement and, except as disclosed to Bank or in the SEC Filings, on the date of each extension of credit by Bank pursuant hereto, with the same effect as though such representations and warranties had been made on and as of each such date, and on each such date, no Event of Default as defined herein, and no condition, event or act which with the giving of notice or the passage of time or both would constitute such an Event of Default, shall have occurred and be continuing or shall exist.

(b)Documentation. Bank shall have received all additional documents which may be required in connection with such extension of credit.

(c)Letter of Credit Documentation. Prior to the issuance of any Letter of Credit, Bank shall have received a Letter of Credit Agreement and any other letter of credit documentation required by Bank, in each case completed and duly executed by Borrower.

(d)No Material Adverse Change. There shall not exist or have occurred any event or condition that impairs, or is substantially to impair, the prospect of payment or performance by Borrower of its obligations under any of the Loan Documents.

ARTICLE IV

AFFIRMATIVE COVENANTS

Borrower covenants that so long as Bank remains committed to extend credit to Borrower pursuant hereto, or any liabilities (whether direct or contingent, liquidated or unliquidated) of Borrower to Bank under any of the Loan Documents remain outstanding, and until payment in full of all obligations (other than inchoate indemnity obligations) of Borrower subject hereto, Borrower shall, unless Bank otherwise consents in writing:

SECTION 4.1.PUNCTUAL PAYMENTS. Within seven (7) days after such obligations are due and payable, pay all principal, interest, fees or other liabilities due under any of the Loan Documents at the times and place and in the manner specified therein, and immediately upon demand by Bank, the amount by which the outstanding principal balance of any credit subject hereto at any time exceeds any limitation on borrowings applicable thereto.

SECTION 4.2.ACCOUNTING RECORDS. Maintain adequate books and records in accordance with generally accepted accounting principles consistently applied, and permit any representative of Bank, at any reasonable time, to inspect, audit and examine such books and records, to make copies of the same, and to inspect the properties of Borrower.

SECTION 4.3.FINANCIAL STATEMENTS. Provide to Bank all of the following, in form and detail satisfactory to Bank:

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(a)not later than one hundred twenty (120) days after and as of the end of each fiscal year, an audited financial statement of Borrower, prepared by a certified public accountant acceptable to Bank, to include a balance sheet, income statement, and statement of cash flow;

(b)not later than forty-five (45) days after and as of the end of each fiscal quarter, a financial statement of Borrower, prepared by Borrower, to include balance sheet, income statement, and statement of cash flow;

(c)not later than ninety (90) days after the end of each fiscal year, an annual budget and projection report, prepared by Borrower;

(d)contemporaneously with each fiscal quarter financial statement of Borrower required hereby, a certificate of the president or chief financial officer of Borrower that such financial statement is accurate and that there exists no Event of Default nor any condition, act or event which with the giving of notice or the passage of time or both would constitute an Event of Default;

(e)concurrently with the submission of each request for a Line of Credit advance or issuance of a Letter of Credit, a certificate of the president or chief financial officer of Borrower that the financial statements referred to in Section 4.3(d) are accurate, there exists no Event of Default, and no condition, event or act which with the giving of notice or the passage of time or both would constitute such an Event of Default; and

(f)from time to time, such other information as Bank may reasonably request.

SECTION 4.4.COMPLIANCE. Preserve and maintain all licenses, permits, governmental approvals, rights, privileges and franchises necessary for the conduct of its business; and comply with the provisions of all documents pursuant to which Borrower is organized and/or which govern Borrower's continued existence and with the requirements of all laws, rules, regulations and orders of any governmental authority applicable to Borrower and/or its business, the noncompliance with or violation of which could reasonably be expected to have a material adverse effect on Borrower’s business.

SECTION 4.5.INSURANCE. Maintain and keep in force, for each business in which Borrower is engaged, insurance of the types and in amounts customarily carried in similar lines of business, including, but not limited to, fire, extended coverage, public liability, flood, and workers' compensation, with all such insurance carried in amounts satisfactory to Bank, and deliver to Bank from time to time at Bank's request schedules setting forth all insurance then in effect. Such insurance may be obtained from an insurer or through an insurance agent of Borrower’s choice, provided that any insurer chosen by Borrower is acceptable to Bank on such reasonable grounds as may be permitted under applicable law.

SECTION 4.6.FACILITIES. Keep all properties useful or necessary to Borrower's business in good repair and condition, and from time to time make necessary repairs, renewals and replacements thereto so that such properties shall be fully and efficiently preserved and maintained.

SECTION 4.7.TAXES AND OTHER LIABILITIES. Pay and discharge when due any and all indebtedness, obligations, assessments and taxes, both real or personal, including without limitation federal and state income taxes and state and local property taxes and assessments, except (a) such as Borrower may in good faith contest or as to which a bona fide dispute may arise, and (b) for which Borrower has made provision with adequate reserves under GAAP for eventual payment thereof in the event Borrower is obligated to make such payment.

SECTION 4.8.LITIGATION. Except as disclosed in the SEC Filings, promptly give notice in writing to Bank of any litigation pending or threatened in writing against Borrower involving more than $1,000,000 individually, or $10,000,000 in the aggregate.

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SECTION 4.9.FINANCIAL CONDITION. Maintain Borrower's financial condition as follows using generally accepted accounting principles consistently applied and used consistently with prior practices (except to the extent modified by the definitions herein):

(a)Minimum Liquidity not less than Fifty Million Dollars ($50,000,000.00) at all times, measured on a consolidated basis at each fiscal quarter end.

As used herein, “Minimum Liquidity” means, as of any date of determination, with respect to Borrower and its subsidiaries on a consolidated basis, determined in accordance with GAAP, the sum of unrestricted cash and unrestricted short‑term and long‑term marketable securities.

(b)Funded Debt to Adjusted EBITDA not greater than 2.00 to 1.00 as of each fiscal quarter end, determined on a rolling 4-quarter basis.

(c)Maintain Borrower’s primary collection and disbursement deposit account(s) with Bank or any banking affiliate of Bank.

As used herein, “Funded Debt” means, as of any date of determination, with respect to Borrower and its subsidiaries on a consolidated basis, determined in accordance with GAAP, the outstanding principal amount of all indebtedness owing by Borrower and its subsidiaries, whether current or long‑term, including, without limitation, the obligations under this Agreement and all obligations evidenced by notes, loan agreements or other similar instruments, bonds, debentures, reimbursement agreements, bankers’ acceptances, bank guaranties, capital leases, synthetic leases, surety bonds and similar instruments and the maximum drawing amount of all standby and commercial letters of credit outstanding (other than any standby or commercial letters of credit to the extent that they are cash collateralized). If, at any time, any change in GAAP would affect the definition of Funded Debt and either Borrower or Bank shall so request, Bank and Borrower shall negotiate in good faith to amend such ratio or requirements to preserve the original intent thereof in light of such change in GAAP; provided that, until so amended, (i) such ratio or requirement shall continue to be computed in accordance with GAAP prior to such change therein and (ii) Borrower shall provide to Bank financial statements and other documents required under this Agreement or as reasonably requested hereunder setting forth a reconciliation between calculations of such ratio or requirement made before and after giving effect to such change in GAAP.

As used herein, the term “Adjusted EBITDA” means, for any period, with respect to Borrower and its subsidiaries, Consolidated Net Income (as defined below), minus without duplication and to the extent included in determining such Consolidated Net Income, extraordinary or other non‑recurring non‑cash gains and interest income plus, without duplication and to the extent excluded in determining such Consolidated Net Income, (i) extraordinary or other non-recurring non-cash losses, including any non-cash charges for stock-based compensation expenses and impairment of intangibles, (ii) consolidated interest expense, (iii) income taxes, (iv) depreciation and amortization, (v) amortization of acquired inventory write‑up to fair market value in accordance with GAAP, and (vi) expenses incurred in connection with certain one‑time events as may in the future occur, subject to the mutual agreement of Borrower and Bank, in each case for such period, as determined in accordance with GAAP.

As used herein, the term “Consolidated Net Income” means, for any specified period, the net income or loss of Borrower and its subsidiaries determined for such period on a consolidated basis in accordance with GAAP.

SECTION 4.10.NOTICE TO BANK. Promptly (but in no event more than five (5) days after the occurrence of each such event or matter) give written notice to Bank in reasonable detail of: (a) the occurrence of any Event of Default, or any condition, event or act which with the giving of notice or the passage of time or both would constitute an Event of Default; (b) any change in the name or the organizational structure of Borrower; (c) the occurrence and nature of any Reportable Event or Prohibited

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Transaction, each as defined in ERISA, or any funding deficiency with respect to any Plan; or (d) any termination or cancellation of any insurance policy which Borrower is required to maintain, or any uninsured or partially uninsured loss through liability or property damage, or through fire, theft or any other cause affecting Borrower's property.

ARTICLE V

NEGATIVE COVENANTS

Borrower further covenants that so long as Bank remains committed to extend credit to Borrower pursuant hereto, or any liabilities (whether direct or contingent, liquidated or unliquidated, but excluding inchoate indemnity obligations) of Borrower to Bank under any of the Loan Documents remain outstanding, and until payment in full of all obligations (other than inchoate indemnity obligations) of Borrower subject hereto, Borrower shall not without Bank's prior written consent:

SECTION 5.1.USE OF FUNDS. Use any of the proceeds of any credit extended hereunder except for the purposes stated in Article I hereof.

SECTION 5.2.OTHER INDEBTEDNESS. Create, incur, assume or permit to exist any indebtedness or liabilities resulting from borrowings, loans or advances, whether secured or unsecured, matured or unmatured, liquidated or unliquidated, joint or several, except (a) the liabilities of Borrower to Bank under the Loan Documents, (b) any other liabilities of Borrower existing as of, and disclosed to Bank prior to, the date hereof, (c) new purchase money debt and other term debt in amounts not to exceed an aggregate of Twenty Million Dollars ($20,000,000) at any time (provided that, for the avoidance of doubt, this Section 5.2(c) shall not permit to exist any revolving or working capital debt other than the liabilities of Borrower Bank under the Loan Documents), (d) the issuance of unsecured, subordinated convertible debt, provided, however, that such debt is subordinated in writing on terms reasonably acceptable to Bank and that Borrower is in pro forma compliance with financial covenants both pre and post issuance of debt, (e) indebtedness to trade creditors incurred in the ordinary course of business, (f) indebtedness incurred as a result of endorsing negotiable instruments received in the ordinary course of business, (g) indebtedness secured by Permitted Liens, (h) indebtedness between Borrower and its subsidiaries in the ordinary course of business, and (h) extensions, refinancings, modifications and restatements of the foregoing provided that the principal amount thereof is not increased or the terms thereof are not modified to impose more burdensome terms.

SECTION 5.3.MERGER, CONSOLIDATION, TRANSFER OF ASSETS. Borrower may enter into mergers or acquisitions with, and make loans or advances to and equity investments in, and sell, lease or transfer assets to third party entities so long as Borrower is the surviving entity (as applicable) and Borrower is in pro forma compliance with financial covenants both before and after each such merger, consolidation, acquisition, loan, advance, equity investment, sale, lease or transfer of assets

SECTION 5.4.GUARANTIES. Guarantee or become liable in any way as surety, endorser (other than as endorser of negotiable instruments for deposit or collection in the ordinary course of business), accommodation endorser or otherwise for, nor pledge or hypothecate any assets of Borrower as security for, any liabilities or obligations of any other person or entity, except (a) any of the foregoing in favor of Bank and (b) in the ordinary course of Borrower’s business.

SECTION 5.5.LOANS, ADVANCES, INVESTMENTS. Make any loans or advances to or investments in any person or entity, except (a) any of the foregoing existing as of, and disclosed to Bank prior to, the date hereof, (b) any of the foregoing in accordance with the provisions of Section 5.2 above, (c) additional loans, advances or investments in or to Borrower’s subsidiaries in the ordinary course of business, or (d) investments made pursuant to a board-approved investment policy.

SECTION 5.6.PLEDGE OF ASSETS. Mortgage, pledge, grant or permit to exist a security interest in, or lien upon, all or any portion of Borrower's assets now owned or hereafter acquired, except

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any of the foregoing (a) in favor of Bank, (b) which is existing as of, and disclosed to Bank in writing prior to, the date hereof, or (c) which constitutes a Permitted Lien.

ARTICLE VI

EVENTS OF DEFAULT

SECTION 6.1.The occurrence of any of the following constitutes an “Event of Default” under this Agreement:

(a)Borrower shall fail to pay, within seven (7) days of when due, any principal, interest, fees or other amounts payable under any of the Loan Documents (provided that (i) such seven (7) day cure period shall not apply to payments due upon the maturity of the Line of Credit and (ii) during the pendency of such cure period, the failure to make or pay any amount specified under this subclause (a) is not an Event of Default, but Borrower shall not have the right to request and Bank shall not be obligated to make any credit extension hereunder during such cure period).

(b)Any financial statement or certificate furnished to Bank in connection with, or any representation or warranty made by Borrower or any other party under this Agreement or any other Loan Document shall prove to be incorrect, false or misleading in any material respect when furnished or made.

(c)Any default in the performance of or compliance with any obligation, agreement or other provision contained herein or in any other Loan Document (other than those specifically described as an “Event of Default” in this section 6.1), and with respect to any such default that by its nature can be cured, such default shall continue for a period of thirty (30) days from its occurrence.

(d)Any default in the payment or performance of any monetary obligation in excess of Five Million Dollars ($5,000,000), or any defined event of default, under the terms of any contract, instrument or document (other than any of the Loan Documents) pursuant to which Borrower, any guarantor hereunder or any general partner or joint venturer in Borrower if a partnership or joint venture (with each such guarantor, general partner and/or joint venturer referred to herein as a “Third Party Obligor”) has incurred any debt for borrowed money in an amount greater than Five Million Dollars($5,000,000).

(e)Borrower or any Third Party Obligor shall become insolvent, or shall suffer or consent to or apply for the appointment of a receiver, trustee, custodian or liquidator of itself or any of its property, or shall generally fail to pay its debts as they become due, or shall make a general assignment for the benefit of creditors; Borrower or any Third Party Obligor shall file a voluntary petition in bankruptcy, or seeking reorganization, in order to effect a plan or other arrangement with creditors or any other relief under the Bankruptcy Reform Act, Title 11 of the United States Code, as amended or recodified from time to time (“Bankruptcy Code”), or under any state or federal law granting relief to debtors, whether now or hereafter in effect; or Borrower or any Third Party Obligor shall file an answer admitting the jurisdiction of the court and the material allegations of any involuntary petition; or Borrower or any Third Party Obligor shall be adjudicated a bankrupt, or an order for relief shall be entered against Borrower or any Third Party Obligor by any court of competent jurisdiction under the Bankruptcy Code or any other applicable state or federal law relating to bankruptcy, reorganization or other relief for debtors.

(f)The filing of a notice of judgment lien against Borrower in an amount of at least $5,000,000 (not covered by independent third-party insurance as to which liability has been accepted by such insurance carrier) shall remain unsatisfied for thirty (30) days and is not discharged or stayed (whether through the posting of a bond or otherwise) within thirty (30) days; or the recording of any abstract of judgment against Borrower in an amount of at least $5,000,000 (not covered by independent third-party insurance as to which liability has been accepted by such insurance carrier) and the same is not, within thirty (30) days after the occurrence thereof, discharged or stayed (whether through the posting of a bond or otherwise) in any county in which Borrower has an interest in real property; or the

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service of a notice of levy and/or of a writ of attachment or execution, or other like process, against the assets of Borrower and the same is not, within thirty (30) days after the occurrence thereof, discharged or stayed (whether through the posting of a bond or otherwise); or the entry of one or more final judgments, orders, or decrees for the payment of money in an amount, individually or in the aggregate, of at least Five Million Dollars ($5,000,000) (not covered by independent third-party insurance as to which liability has been accepted by such insurance carrier) shall be rendered against Borrower and the same is/are not, within thirty (30) days after the entry thereof, discharged or execution thereof stayed or bonded pending appeal, or such judgments are not discharged prior to the expiration of any such stay; or any involuntary petition or proceeding pursuant to the Bankruptcy Code or any other applicable state or federal law relating to bankruptcy, reorganization or other relief for debtors is filed or commenced against Borrower or any Third Party Obligor.

(g)The dissolution or liquidation of Borrower or any Third Party Obligor if a corporation, partnership, joint venture or other type of entity; or Borrower or any such Third Party Obligor, or any of its directors, stockholders or members, shall take action seeking to effect the dissolution or liquidation of Borrower or such Third Party Obligor.

(h)The occurrence of any Change in Control of Borrower coupled with the removal or departure of Balu Balakrishnan as Chief Executive Officer of Borrower.

As used herein, the term “Change in Control” means the occurrence, in a single transaction or in a series of related transactions, of any one or more of the following events: (i) any Exchange Act Person (as hereinafter defined) becomes the Owner, directly or indirectly, of securities of the Borrower representing more than fifty percent (50%) of the combined voting power of Borrower’s then outstanding securities other than by virtue of a merger, consolidation or similar transaction. Notwithstanding the foregoing, a Change in Control shall not be deemed to occur (A) on account of the acquisition of securities of Borrower directly from Borrower, (B) on account of the acquisition of securities of Borrower by an investor, any affiliate thereof or any other Exchange Act Person that acquires Borrower’s securities in a transaction or series of related transactions the primary purpose of which is to obtain financing for Borrower through the issuance of equity securities, or (C) solely because the level of Ownership held by any Exchange Act Person (the “Subject Person”) exceeds the designated percentage threshold of the outstanding voting securities as a result of a repurchase or other acquisition of voting securities by Borrower reducing the number of shares outstanding, provided that if a Change in Control would occur (but for the operation of this sentence) as a result of the acquisition of voting securities by Borrower, and after such share acquisition, the Subject Person becomes the Owner of any additional voting securities that, assuming the repurchase or other acquisition had not occurred, increases the percentage of the then outstanding voting securities Owned by the Subject Person over the designated percentage threshold, then a Change in Control shall be deemed to occur; or (ii) there is consummated a merger, consolidation or similar transaction involving (directly or indirectly) Borrower and, immediately after the consummation of such merger, consolidation or similar transaction, the stockholders of Borrower immediately prior thereto do not Own, directly or indirectly, either (A) outstanding voting securities representing more than fifty percent (50%) of the combined outstanding voting power of the surviving corporation, partnership, limited liability company or other entity in such merger, consolidation or similar transaction or (B) more than fifty percent (50%) of the combined outstanding voting power of the parent of the surviving corporation, partnership, limited liability company or other entity in such merger, consolidation or similar transaction, in each case in substantially the same proportions as their Ownership of the outstanding voting securities of the Borrower immediately prior to such transaction.

As used herein, the term “Exchange Act Person” means any natural person, corporation, partnership, limited liability company or other entity, or “group” (within the meaning of Section 13(d) or 14(d) of the Securities Exchange Act of 1934 (the “Exchange Act”)), except that “Exchange Act Person” shall not include (i) Borrower or any subsidiary of Borrower, (ii) any employee benefit plan of Borrower or any subsidiary of Borrower or any trustee or other fiduciary holding securities under an employee benefit plan of Borrower or any subsidiary of Borrower, (iii) an underwriter temporarily holding securities pursuant to a

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registered public offering of such securities, (iv) a corporation, partnership, limited liability company or other entity Owned, directly or indirectly, by the stockholders of Borrower in substantially the same proportions as their Ownership of stock of Borrower; or (v) any natural person, corporation, partnership, limited liability company or other entity or “group” (within the meaning of Section 13(d) or 14(d) of the Exchange Act) that, as of the date hereof, is the Owner, directly or indirectly, of securities of Borrower representing more than fifty percent (50%) of the combined voting power of Borrower’s then outstanding securities.

A person or corporation, partnership, limited liability company or other entity shall be deemed to “Own,” to have “Owned,” to be the “Owner” of, or to have acquired “Ownership” of securities if such person or corporation, partnership, limited liability company, directly or indirectly, through any contract, arrangement, understanding, relationship or otherwise, has or shares voting power, which includes the power to vote or to direct the voting, with respect to such securities.

SECTION 6.2.REMEDIES. Upon the occurrence of any Event of Default: (a) all principal, unpaid interest outstanding and other indebtedness of Borrower under each of the Loan Documents, any term thereof to the contrary notwithstanding, shall at Bank's option and without notice (except as expressly provided in any mortgage or deed of trust pursuant to which Borrower has provided Bank a lien on any real property collateral) become immediately due and payable without presentment, demand, protest or any notices of any kind, including without limitation, notice of nonperformance, notice of protest, notice of dishonor, notice of intention to accelerate or notice of acceleration, all of which are hereby expressly waived by Borrower; (b) the obligation, if any, of Bank to extend any further credit under any of the Loan Documents shall immediately cease and terminate; and (c) Bank shall have all rights, powers and remedies available under each of the Loan Documents, or accorded by law, including without limitation the right to resort to any or all security for any credit subject hereto and to exercise any or all of the rights of a beneficiary or secured party pursuant to applicable law. All rights, powers and remedies of Bank may be exercised at any time by Bank and from time to time after the occurrence of an Event of Default, are cumulative and not exclusive, and shall be in addition to any other rights, powers or remedies provided by law or equity.

ARTICLE VII

MISCELLANEOUS

SECTION 7.1.NO WAIVER. No delay, failure or discontinuance of Bank in exercising any right, power or remedy under any of the Loan Documents shall affect or operate as a waiver of such right, power or remedy; nor shall any single or partial exercise of any such right, power or remedy preclude, waive or otherwise affect any other or further exercise thereof or the exercise of any other right, power or remedy. Any waiver, permit, consent or approval of any kind by Bank of any breach of or default under any of the Loan Documents must be in writing and shall be effective only to the extent set forth in such writing.

SECTION 7.2.NOTICES. All notices, requests and demands which any party is required or may desire to give to any other party under any provision of this Agreement must be in writing delivered to each party at the following address:

BORROWER:	POWER INTEGRATIONS, INC.
	5245 Hellyer Avenue
	San Jose, California 95138
	Attention: Director of Finance

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BANK:	WELLS FARGO BANK, NATIONAL ASSOCIATION
	121 S. Market Street, 3rd Floor
	San Jose, California 95113
	Attention: Stephen Cordani

or to such other address as any party may designate by written notice to all other parties. Each such notice, request and demand shall be deemed given or made as follows: (a) if sent by hand delivery, upon delivery; (b) if sent by mail, upon the earlier of the date of receipt or three (3) days after deposit in the U.S. mail, first class and postage prepaid; and (c) if sent by telecopy, upon receipt.

SECTION 7.3.COSTS, EXPENSES AND ATTORNEYS' FEES. Borrower shall pay to Bank immediately upon demand the full amount of all payments, advances, charges, costs and expenses, including, to the extent permitted by applicable law, reasonable attorneys' fees (to include outside counsel fees and all allocated costs of Bank's in-house counsel to the extent permissible), expended or incurred by Bank in connection with (a) the negotiation and preparation of this Agreement and the other Loan Documents, Bank's continued administration hereof and thereof, and the preparation of any amendments and waivers hereto and thereto, (b) the enforcement of Bank's rights and/or the collection of any amounts which become due to Bank under any of the Loan Documents, whether or not suit is brought, and (c) the prosecution or defense of any action in any way related to any of the Loan Documents, including, without limitation, any action for declaratory relief, whether incurred at the trial or appellate level, in an arbitration proceeding or otherwise, and including any of the foregoing incurred in connection with any bankruptcy proceeding (including without limitation, any adversary proceeding, contested matter or motion brought by Bank or any other person) relating to Borrower or any other person or entity. Notwithstanding anything in this Agreement to the contrary, reasonable attorneys' fees shall not exceed the amount permitted by law. Whenever in this Agreement and the other Loan Documents Borrower is obligated to pay for the attorneys' fees of Bank, or the phrase “reasonable attorneys' fees” or a similar phrase is used, it shall be Borrower's obligation to pay the attorneys' fees actually incurred or allocated, at standard hourly rates, without regard to any statutory interpretation, which shall not apply, Borrower hereby waiving the application of any such statute. Notwithstanding anything to the contrary contained herein, if any party hereto institutes any arbitration or judicial or administrative action or proceeding to enforce any provisions of this Agreement, or alleging any breach of any provision hereof or seeking damages or any remedy, the losing party or parties shall pay to the prevailingparty or parties all costs and expenses, including, but not limited to, reasonable attorneys’ fees, expended or incurred by the prevailing party or parties in connection therewith, whether incurred at the trial or appellate level, in an arbitration proceeding or otherwise, and including, but not limited to, any of the foregoing incurred in connection with any bankruptcy proceeding (including without limitation, any adversary proceeding, contested matter or motion brought by Bank or any other person) relating to Borrower or any other person or entity.

SECTION 7.4.SUCCESSORS, ASSIGNMENT. This Agreement shall be binding upon and inure to the benefit of the heirs, executors, administrators, legal representatives, successors and assigns of the parties; provided however, that Borrower may not assign or transfer its interests or rights hereunder without Bank's prior written consent. Bank reserves the right to sell, assign, transfer, negotiate or grant participations in all or any part of, or any interest in, Bank's rights and benefits under each of the Loan Documents. In connection therewith, Bank may disclose all documents and information which Bank now has or may hereafter acquire relating to any credit subject hereto, Borrower or its business, any guarantor hereunder or the business of such guarantor, if any, or any collateral required hereunder.

SECTION 7.5.ENTIRE AGREEMENT; AMENDMENT. To the full extent permitted by law, this Agreement and the other Loan Documents constitute the entire agreement between Borrower and Bank with respect to each credit subject hereto and supersede all prior negotiations, communications,

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discussions and correspondence concerning the subject matter hereof. This Agreement may be amended or modified only in writing signed by each party hereto.

SECTION 7.6.NO THIRD PARTY BENEFICIARIES. This Agreement is made and entered into for the sole protection and benefit of the parties hereto and their respective permitted successors and assigns, and no other person or entity shall be a third party beneficiary of, or have any direct or indirect cause of action or claim in connection with, this Agreement or any other of the Loan Documents to which it is not a party.

SECTION 7.7.TIME. Time is of the essence of each and every provision of this Agreement and each other of the Loan Documents.

SECTION 7.8.SEVERABILITY OF PROVISIONS. If any provision of this Agreement shall be prohibited by or invalid under applicable law, such provision shall be ineffective only to the extent of such prohibition or invalidity without invalidating the remainder of such provision or any remaining provisions of this Agreement.

SECTION 7.9.COUNTERPARTS. This Agreement may be executed in any number of counterparts, each of which when executed and delivered shall be deemed to be an original, and all of which when taken together shall constitute one and the same Agreement.

SECTION 7.10.GOVERNING LAW. This Agreement shall be governed by and construed in accordance with the laws of California (such State, Commonwealth or District is referred to herein as the “State”), but giving effect to federal laws applicable to national banks, without reference to the conflicts of law or choice of law principles thereof.

SECTION 7.11.BUSINESS PURPOSE. Borrower represents and warrants that each credit subject hereto is made for (a) a business, commercial, investment, agricultural or other similar purpose, (b) the purpose of acquiring or carrying on a business, professional or commercial activity, or (c) the purpose of acquiring any real or personal property as an investment and not primarily for a personal, family or household use.

SECTION 7.12.ARBITRATION.

(a)Arbitration. The parties hereto agree, upon demand by any party, to submit to binding arbitration all claims, disputes and controversies between or among them (and their respective employees, officers, directors, attorneys, and other agents), whether in tort, contract or otherwise in any way arising out of or relating to (i) any credit subject hereto, or any of the Loan Documents, and their negotiation, execution, collateralization, administration, repayment, modification, extension, substitution, formation, inducement, enforcement, default or termination; or (ii) requests for additional credit. In the event of a court ordered arbitration, the party requesting arbitration shall be responsible for timely filing the demand for arbitration and paying the appropriate filing fee within 30 days of the abatement order or the time specified by the court. Failure to timely file the demand for arbitration as ordered by the court will result in that party’s right to demand arbitration being automatically terminated.

(b)Governing Rules. Any arbitration proceeding will (i) proceed in a location in the State selected by the American Arbitration Association (“AAA”); (ii) be governed by the Federal Arbitration Act (Title 9 of the United States Code), notwithstanding any conflicting choice of law provision in any of the documents between the parties; and (iii) be conducted by the AAA, or such other administrator as the parties shall mutually agree upon, in accordance with the AAA’s commercial dispute resolution procedures, unless the claim or counterclaim is at least $1,000,000.00 exclusive of claimed interest, arbitration fees and costs in which case the arbitration shall be conducted in accordance with the AAA’s optional procedures for large, complex commercial disputes (the commercial dispute resolution procedures or the optional procedures for large, complex commercial disputes to be referred to herein, as

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applicable, as the “Rules”). If there is any inconsistency between the terms hereof and the Rules, the terms and procedures set forth herein shall control. Any party who fails or refuses to submit to arbitration following a demand by any other party shall bear all costs and expenses incurred by such other party in compelling arbitration of any dispute. Nothing contained herein shall be deemed to be a waiver by any party that is a bank of the protections afforded to it under 12 U.S.C. §91 or any similar applicable state law.

(c)No Waiver of Provisional Remedies, Self-Help and Foreclosure. The arbitration requirement does not limit the right of any party to (i) foreclose against real or personal property collateral; (ii) exercise self-help remedies relating to collateral or proceeds of collateral such as setoff or repossession; or (iii) obtain provisional or ancillary remedies such as replevin, injunctive relief, attachment or the appointment of a receiver, before during or after the pendency of any arbitration proceeding. This exclusion does not constitute a waiver of the right or obligation of any party to submit any dispute to arbitration or reference hereunder, including those arising from the exercise of the actions detailed in sections (i), (ii) and (iii) of this paragraph.

(d)Arbitrator Qualifications and Powers. Any arbitration proceeding in which the amount in controversy is $5,000,000.00 or less will be decided by a single arbitrator selected according to the Rules, and who shall not render an award of greater than $5,000,000.00. Any dispute in which the amount in controversy exceeds $5,000,000.00 shall be decided by majority vote of a panel of three arbitrators; provided however, that all three arbitrators must actively participate in all hearings and deliberations. The arbitrator will be a neutral attorney licensed in the State or a neutral retired judge of the state or federal judiciary of the State, in either case with a minimum of ten years’ experience in the substantive law applicable to the subject matter of the dispute to be arbitrated. The arbitrator will determine whether or not an issue is arbitratable and will give effect to the statutes of limitation in determining any claim. In any arbitration proceeding the arbitrator will decide (by documents only or with a hearing at the arbitrator's discretion) any pre-hearing motions which are similar to motions to dismiss for failure to state a claim or motions for summary adjudication. The arbitrator shall resolve all disputes in accordance with the substantive law of the State and may grant any remedy or relief that a court of such state could order or grant within the scope hereof and such ancillary relief as is necessary to make effective any award. The arbitrator shall also have the power to award recovery of all costs and fees, to impose sanctions and to take such other action as the arbitrator deems necessary to the same extent a judge could pursuant to the Federal Rules of Civil Procedure, the corresponding rules of civil practice and procedure applicable in the State or other applicable law. Judgment upon the award rendered by the arbitrator may be entered in any court having jurisdiction. The institution and maintenance of an action for judicial relief or pursuit of a provisional or ancillary remedy shall not constitute a waiver of the right of any party, including the plaintiff, to submit the controversy or claim to arbitration if any other party contests such action for judicial relief.

(e)Discovery. In any arbitration proceeding, discovery will be permitted in accordance with the Rules. All discovery shall be expressly limited to matters directly relevant to the dispute being arbitrated and must be completed no later than 20 days before the hearing date. Any requests for an extension of the discovery periods, or any discovery disputes, will be subject to final determination by the arbitrator upon a showing that the request for discovery is essential for the party's presentation and that no alternative means for obtaining information is available.

(f)Class Proceedings and Consolidations. No party hereto shall be entitled to join or consolidate disputes by or against others in any arbitration, except parties who have executed any Loan Document, or to include in any arbitration any dispute as a representative or member of a class, or to act in any arbitration in the interest of the general public or in a private attorney general capacity.

(g)Payment of Arbitration Costs and Fees. The arbitrator shall award all costs and expenses of the arbitration proceeding.

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(h)Real Property Collateral; Judicial Reference. Notwithstanding anything herein to the contrary, no dispute shall be submitted to arbitration if the dispute concerns indebtedness secured directly or indirectly, in whole or in part, by any real property unless (i) the holder of the mortgage, lien or security interest specifically elects in writing to proceed with the arbitration, or (ii) all parties to the arbitration waive any rights or benefits that might accrue to them by virtue of the single action rule statute of California, thereby agreeing that all indebtedness and obligations of the parties, and all mortgages, liens and security interests securing such indebtedness and obligations, shall remain fully valid and enforceable. If any such dispute is not submitted to arbitration, the dispute shall be referred to a referee in accordance with California Code of Civil Procedure Section 638 et seq., and this general reference agreement is intended to be specifically enforceable in accordance with said Section 638. A referee with the qualifications required herein for arbitrators shall be selected pursuant to the AAA’s selection procedures. Judgment upon the decision rendered by a referee shall be entered in the court in which such proceeding was commenced in accordance with California Code of Civil Procedure Sections 644 and 645.

(i)Miscellaneous. To the maximum extent practicable, the AAA, the arbitrators and the parties shall take all action required to conclude any arbitration proceeding within 180 days of the filing of the dispute with the AAA. No arbitrator or other party to an arbitration proceeding may disclose the existence, content or results thereof, except for disclosures of information by a party required in the ordinary course of its business or by applicable law or regulation. If more than one agreement for arbitration by or between the parties potentially applies to a dispute, the arbitration provision most directly related to the Loan Documents or the subject matter of the dispute shall control. This arbitration provision shall survive termination, amendment or expiration of any of the Loan Documents or any relationship between the parties.

(j)Small Claims Court. Notwithstanding anything herein to the contrary, each party retains the right to pursue in Small Claims Court any dispute within that court’s jurisdiction. Further, this arbitration provision shall apply only to disputes in which either party seeks to recover an amount of money (excluding attorneys’ fees and costs) that exceeds the jurisdictional limit of the Small Claims Court.

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IN WITNESS WHEREOF, the parties hereto, intending to be legally bound hereby, have caused this Agreement to be executed as of the day and year first written above.

		WELLS FARGO BANK,
POWER INTEGRATIONS, INC.		NATIONAL ASSOCIATION
By:	/s/ Balu Balakrishnan	By:	/s/ Stephen Cordani
Name:	Balu Balakrishnan	Name:	Stephen Cordani
Title:	Chief Executive Officer	Title:	Senior Vice President

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REVOLVING LINE OF CREDIT NOTE

$75,000,000.00 July 27, 2016

FOR VALUE RECEIVED, the undersigned POWER INTEGRATIONS, INC., a Delaware corporation ("Borrower"), promises to pay to the order of WELLS FARGO BANK, NATIONAL ASSOCIATION ("Bank") at its office at 121 S. Market Street, 3rd Floor, San Jose, California 95113, or at such other place as the holder hereof may designate, in lawful money of the United States of America and in immediately available funds, the principal sum of Seventy-Five Million Dollars ($75,000,000), or so much thereof as may be advanced and be outstanding pursuant to the terms of the Credit Agreement, as defined herein, with interest thereon, to be computed on each advance from the date of its disbursement as set forth herein.

DEFINITIONS:

As used herein, the following terms shall have the meanings set forth after each, and any other term defined in this Note shall have the meaning set forth at the place defined:

(a)"LIBOR" means the rate of interest per annum determined by Bank based on the rate for United States dollar deposits for delivery on the first day of each LIBOR Period for a period approximately equal to such LIBOR Period as published by the ICE Benchmark Administration Limited, a United Kingdom company, at approximately 11:00 a.m., London time, two London Business Days prior to the first day of such LIBOR Period (or if not so published, then as determined by Bank from another recognized source or interbank quotation); provided, however, that if LIBOR determined as provided above would be less than zero percent (0.0%), then LIBOR shall be deemed to be zero percent (0.0%).

(b)"LIBOR Period" means a period commencing on a New York Business Day and continuing for one, three or six months, as designated by Borrower, during which all or a portion of the outstanding principal balance of this Note bears interest determined in relation to LIBOR; provided however, that (i) no LIBOR Period may be selected for a principal amount less than One Million Dollars ($1,000,000), (ii) if the day after the end of any LIBOR Period is not a New York Business Day (so that a new LIBOR Period could not be selected by Borrower to start on such day), then such LIBOR Period shall continue up to, but shall not include, the next New York Business Day after the end of such LIBOR Period, unless the result of such extension would be to cause any immediately following LIBOR Period to begin in the next calendar month in which event the LIBOR Period shall continue up to, but shall not include, the New York Business Day immediately preceding the last day of such LIBOR Period, and (iii) no LIBOR Period shall extend beyond the scheduled maturity date hereof.

(c)"London Business Day" means any day that is a day for trading by and between banks in dollar deposits in the London interbank market.

(d)"New York Business Day" means any day except a Saturday, Sunday or any other day on which commercial banks in New York are authorized or required by law to close.

(e)"Prime Rate" means at any time the rate of interest most recently announced within Bank at its principal office as its Prime Rate, with the understanding that the Prime Rate is one of Bank's base rates and serves as the basis upon which effective rates of interest are calculated for those loans making reference thereto, and is evidenced by the recording thereof after its announcement in such internal publication or publications as Bank may designate. If the rate of interest announced by Bank as its Prime Rate at any time is less than zero percent (0.0%), then for purposes of this Note the Prime Rate shall be deemed to be zero percent (0.0%).

(f)"State Business Day" means any day except a Saturday, Sunday or any other day on which commercial banks in the jurisdiction described in “Governing Law” herein are authorized or required by law to close.

INTEREST:

(a)Interest. The outstanding principal balance of this Note shall bear interest (computed on the basis of a 360-day year, actual days elapsed) either (i) at a fluctuating rate per equal to the Prime Rate in effect from time to time, or (ii) at a fixed rate per annum determined by Bank to be one and one-half percent (1.50%) above LIBOR

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in effect on the first day of the applicable LIBOR Period. When interest is determined in relation to the Prime Rate, each change in the rate of interest hereunder shall become effective on the date each Prime Rate change is announced within Bank. With respect to each LIBOR selection option selected hereunder, Bank is hereby authorized to note the date, principal amount, interest rate and LIBOR Period applicable thereto and any payments made thereon on Bank's books and records (either manually or by electronic entry) and/or on any schedule attached to this Note, which notations shall be prima facie evidence of the accuracy of the information noted.

(b) Selection of Interest Rate Options. Subject to the provisions herein regarding LIBOR Periods and the prior notice required for the selection of a LIBOR interest rate, (i) at any time any portion of this Note bears interest determined in relation to LIBOR, it may be continued by Borrower at the end of the LIBOR Period applicable thereto so that all or a portion thereof bears interest determined in relation to the Prime Rate or to LIBOR for a new LIBOR Period designated by Borrower, (ii) at any time any portion of this Note bears interest determined in relation to the Prime Rate, Borrower may convert all or a portion thereof so that it bears interest determined in relation to LIBOR for a LIBOR Period designated by Borrower, and (iii) at the time this Note is disbursed, Borrower may choose to have all or a portion thereof bear interest determined in relation to the Prime Rate or to LIBOR for a LIBOR Period designated by Borrower.

To select a LIBOR interest rate option hereunder, Borrower shall give Bank notice thereof that is received by Bank prior to 11:00 a.m. in the jurisdiction described in “Governing Law” herein on a State Business Day at least two State Business Days prior to the first day of the LIBOR Period, or at a later time during such State Business Day if Bank, at its sole discretion, accepts Borrower’s notice and quotes a fixed rate to Borrower. Such notice shall specify: (A) the interest rate option selected by Borrower, (B) the principal amount subject thereto, and (C) for each LIBOR selection, the length of the applicable LIBOR Period. If Bank has not received such notice in accordance with the foregoing before this Note is disbursed or before the end of any LIBOR Period, Borrower shall be deemed to have made a Prime Rate interest selection for such advance or the principal amount to which such LIBOR Period applied. Any such notice may be given by telephone (or such other electronic method as Bank may permit) so long as it is given in accordance with the foregoing and, with respect to each LIBOR selection, if requested by Bank, Borrower provides to Bank written confirmation thereof not later than three State Business Days after such notice is given. Borrower shall reimburse Bank immediately upon demand for any loss or expense (including any loss or expense incurred by reason of the liquidation or redeployment of funds obtained to fund or maintain a LIBOR borrowing) incurred by Bank as a result of the failure of Borrower to accept or complete a LIBOR borrowing hereunder after making a request therefor. Any reasonable determination of such amounts by Bank shall be conclusive and binding upon Borrower. Should more than one person or entity sign this Note as a Borrower, any notice required above may be given by any one Borrower acting alone, which notice shall be binding on all other Borrowers.

(c)Taxes and Regulatory Costs. Borrower shall pay to Bank immediately upon demand, in addition to any other amounts due or to become due hereunder, any and all (i) withholdings, interest equalization taxes, stamp taxes or other taxes (except income and franchise taxes) imposed by any domestic or foreign governmental authority and related in any manner to LIBOR, and (ii) costs, expenses and liabilities arising from or in connection with reserve percentages prescribed by the Board of Governors of the Federal Reserve System (or any successor) for "Eurocurrency Liabilities" (as defined in Regulation D of the Federal Reserve Board, as amended), assessment rates imposed by the Federal Deposit Insurance Corporation, or similar requirements or costs imposed by any domestic or foreign governmental authority or resulting from compliance by Bank with any request or directive (whether or not having the force of law) from any central bank or other governmental authority and related in any manner to LIBOR. In determining which of the foregoing are attributable to any LIBOR option available to Borrower hereunder, any reasonable allocation made by Bank among its operations shall be conclusive and binding upon Borrower.

(d)Default Interest. From and after the maturity date of this Note, or such earlier date as all principal owing hereunder becomes due and payable by acceleration or otherwise, or upon the occurrence and during the continuance of an Event of Default, then at the option of Bank, in its sole and absolute discretion, the outstanding principal balance of this Note shall bear interest at an increased rate per annum (computed on the basis of a 360-day year, actual days elapsed) equal to four percent (4%) above the rate of interest from time to time applicable to this Note.

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BORROWING AND REPAYMENT:

(a)Borrowing and Repayment of Principal. Borrower may from time to time during the term of this Note borrow, partially or wholly repay its outstanding borrowings, and reborrow, subject to all of the limitations, terms and conditions of this Note and of any document executed in connection with or governing this Note; provided however, that the total outstanding borrowings under this Note shall not at any time exceed the principal amount stated above. The unpaid principal balance of this obligation at any time shall be the total amounts advanced hereunder by the holder hereof less the amount of principal payments made hereon by or for Borrower, which balance may be endorsed hereon from time to time by the holder. The outstanding principal balance of this Note shall be due and payable in full on July 26, 2019.

(b)Payment of Interest. Interest accrued on this Note shall be payable on the first day of each month, commencing September 1, 2016.

(c)Advances. Advances hereunder, to the total amount of the principal sum stated above, may be made by the holder at the written request (which written request may be made by e-mail) of (i) Balu Balakrishnan, Sandeep Nayyar, Eric Verity or Jeff Padilla, any one acting alone, who are authorized to request advances and direct the disposition of any advances until written notice of the revocation of such authority is received by the holder at the office designated above, or (ii) any person, with respect to advances deposited to the credit of any deposit account of Borrower, which advances, when so deposited, shall be conclusively presumed to have been made to or for the benefit of Borrower regardless of the fact that persons other than those authorized to request advances may have authority to draw against such account. The holder shall have no obligation to determine whether any person requesting an advance is or has been authorized by Borrower.

(d)Application of Payments. Each payment made on this Note shall be credited first, to any interest then due and second, to the outstanding principal balance hereof. All payments credited to principal shall be applied first, to the outstanding principal balance of this Note which bears interest determined in relation to the Prime Rate, if any, and second, to the outstanding principal balance of this Note which bears interest determined in relation to LIBOR, with such payments applied to the oldest LIBOR Period first.

PREPAYMENT:

(a)Prime Rate. Borrower may prepay principal on any portion of this Note which bears interest determined in relation to the Prime Rate at any time, in any amount and without penalty.

(b)LIBOR. Borrower may prepay principal on any portion of this Note which bears interest determined in relation to LIBOR at any time and in the minimum amount of One Hundred Thousand Dollars ($100,000) or a whole multiple of One Hundred Thousand Dollars ($100,000) in excess thereof; provided however, that if the outstanding principal balance of such portion of this Note is less than said amount, the minimum prepayment amount shall be the entire outstanding principal balance thereof. In consideration of Bank providing this prepayment option to Borrower, or if any such portion of this Note shall become due and payable at any time prior to the last day of the LIBOR Period applicable thereto by acceleration or otherwise, Borrower shall pay to Bank immediately upon demand a fee which is the sum of the discounted monthly differences for each month from the month of prepayment through the month in which such LIBOR Period matures, calculated as follows for each such month:

(i)Determine the amount of interest which would have accrued each month on the amount prepaid at the interest rate applicable to such amount had it remained outstanding until the last day of the LIBOR Period applicable thereto.

(ii)Subtract from the amount determined in (i) above the amount of interest which would have accrued for the same month on the amount prepaid for the remaining term of such LIBOR Period at LIBOR in effect on the date of prepayment for new loans made for such term and in a principal amount equal to the amount prepaid.

(iii)If the result obtained in (ii) for any month is greater than zero, discount that difference by LIBOR used in (ii) above.

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Borrower acknowledges that prepayment of such amount may result in Bank incurring additional costs, expenses and/or liabilities, and that it is difficult to ascertain the full extent of such costs, expenses and/or liabilities. Borrower, therefore, agrees to pay the above-described prepayment fee and agrees that said amount represents a reasonable estimate of the prepayment costs, expenses and/or liabilities of Bank. If Borrower fails to pay any prepayment fee when due, the amount of such prepayment fee shall thereafter bear interest until paid at a rate per annum four percent (4.0%) above the Prime Rate in effect from time to time (computed on the basis of a 360-day year, actual days elapsed).

(c)Application of Prepayments. If principal under this Note is payable in more than one installment, then any prepayments of principal shall be applied to the most remote principal installment or installments then unpaid.

EVENTS OF DEFAULT:

This Note is made pursuant to and is subject to the terms and conditions of that certain Credit Agreement between Borrower and Bank dated as of July 27, 2016, as amended from time to time (the "Credit Agreement"). Any default in the payment or performance of any obligation under this Note, or any defined event of default under the Credit Agreement, shall constitute an "Event of Default" under this Note.

MISCELLANEOUS:

(a)Remedies. Upon the sale, transfer, hypothecation, assignment or other encumbrance, whether voluntary, involuntary or by operation of law, of all or any interest in any real property securing this Note, if any, or upon the occurrence of any Event of Default, the holder of this Note, at the holder's option, may declare all sums of principal and interest outstanding hereunder to be immediately due and payable without presentment, demand, notice of nonperformance, notice of protest, protest or notice of dishonor, all of which are expressly waived by Borrower, and the obligation, if any, of the holder to extend any further credit hereunder shall immediately cease and terminate. Borrower shall pay to the holder immediately upon demand the full amount of all payments, advances, charges, costs and expenses, including reasonable attorneys' fees (to include outside counsel fees and all allocated costs of the holder's in-house counsel), expended or incurred by the holder in connection with the enforcement of the holder's rights and/or the collection of any amounts which become due to the holder under this Note whether or not suit is brought, and the prosecution or defense of any action in any way related to this Note, including without limitation, any action for declaratory relief, whether incurred at the trial or appellate level, in an arbitration proceeding or otherwise, and including any of the foregoing incurred in connection with any bankruptcy proceeding (including without limitation, any adversary proceeding, contested matter or motion brought by Bank or any other person) relating to Borrower or any other person or entity.

(b)Obligations Joint and Several. Should more than one person or entity sign this Note as a Borrower, the obligations of each such Borrower shall be joint and several.

(c)Governing Law. This Note shall be governed by and construed in accordance with the laws of the state of California, but giving effect to federal laws applicable to national banks, without reference to the conflicts of law or choice of law principles thereof.

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IN WITNESS WHEREOF, the undersigned has executed this Note as of the date first written above.

POWER INTEGRATIONS, INC.
By:	/s/ Balu Balakrishnan
Name:	Balu Balakrishnan
Title:	Chief Executive Officer

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EX-31.1

Exhibit 31.1

CERTIFICATION OF CHIEF EXECUTIVE OFFICER

I, Balu Balakrishnan certify that:

1.I have reviewed this Form 10-Q of Power Integrations, Inc.;

2.Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;

3.Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report;

4.The registrant's other certifying officer and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for the registrant and have:

(a)Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;

(b)Designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;

(c)Evaluated the effectiveness of the registrant's disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and

(d)Disclosed in this report any change in the registrant's internal control over financial reporting that occurred during the registrant's most recent fiscal quarter (the registrant's fourth fiscal quarter in the case of an annual report) that has materially affected, or is reasonably likely to materially affect, the registrant's internal control over financial reporting; and

5.The registrant's other certifying officer and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant's auditors and the audit committee of the registrant's board of directors (or persons performing the equivalent functions):

(a)All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant's ability to record, process, summarize and report financial information; and

(b)Any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant's internal control over financial reporting.

Dated:	July 29, 2016	By:	/s/ BALU BALAKRISHNAN
			Balu Balakrishnan Chief Executive Officer

EX-31.2

Exhibit 31.2

CERTIFICATION OF CHIEF FINANCIAL OFFICER

I, Sandeep Nayyar, certify that:

1.I have reviewed this Form 10-Q of Power Integrations, Inc.;

2.Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;

3.Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report;

4.The registrant's other certifying officer and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for the registrant and have:

(a)Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;

(b)Designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;

(c)Evaluated the effectiveness of the registrant's disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and

(d)Disclosed in this report any change in the registrant's internal control over financial reporting that occurred during the registrant's most recent fiscal quarter (the registrant's fourth fiscal quarter in the case of an annual report) that has materially affected, or is reasonably likely to materially affect, the registrant's internal control over financial reporting; and

5.The registrant's other certifying officer and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant's auditors and the audit committee of the registrant's board of directors (or persons performing the equivalent functions):

(a)All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant's ability to record, process, summarize and report financial information; and

(b)Any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant's internal control over financial reporting.

Dated:	July 29, 2016	By:	/s/ SANDEEP NAYYAR
			Sandeep Nayyar Chief Financial Officer

EX-32.1

Exhibit 32.1

CERTIFICATION OF CHIEF EXECUTIVE OFFICER

CERTIFICATION PURSUANT TO 18 U.S.C. SECTION 1350, AS ADOPTED PURSUANT TO SECTION 906 OF

THE SARBANES-OXLEY ACT OF 2002

In connection with the Quarterly Report of Power Integrations, Inc. (the “Company”) on Form 10-Q for the quarter ended June 30, 2016, as filed with the Securities and Exchange Commission on the date hereof (the “Report”), I, Balu Balakrishnan, Chief Executive Officer of the Company, pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002 (“Section 906”), certify to the best of my knowledge that:

(1)The Report fully complies with the requirements of Section 13(a) or Section 15(d) of the Securities Exchange Act of 1934; and

(2)The information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Company.

Dated:	July 29, 2016	By:	/s/ BALU BALAKRISHNAN
			Balu Balakrishnan Chief Executive Officer

A signed original of this written statement required by Section 906, or other document authenticating, acknowledging, or otherwise adopting the signature that appears in typed form within the electronic version of this written statement required by Section 906, has been provided to the Registrant and will be retained by the Registrant and furnished to the Securities and Exchange Commission or its staff upon request.

EX-32.2

Exhibit 32.2

CERTIFICATION OF CHIEF FINANCIAL OFFICER

CERTIFICATION PURSUANT TO 18 U.S.C. SECTION 1350, AS ADOPTED PURSUANT TO SECTION 906 OF

THE SARBANES-OXLEY ACT OF 2002

In connection with the Quarterly Report of Power Integrations, Inc. (the “Company”) on Form 10-Q for the quarter ended June 30, 2016, as filed with the Securities and Exchange Commission on the date hereof (the “Report”), I, Sandeep Nayyar, Chief Financial Officer of the Company, pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002 (“Section 906”), certify to the best of my knowledge that:

(1)The Report fully complies with the requirements of Section 13(a) or Section 15(d) of the Securities Exchange Act of 1934; and

(2)The information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Company.

Dated:	July 29, 2016	By:	/s/ SANDEEP NAYYAR
			Sandeep Nayyar Chief Financial Officer

A signed original of this written statement required by Section 906, or other document authenticating, acknowledging, or otherwise adopting the signature that appears in typed form within the electronic version of this written statement required by Section 906, has been provided to the Registrant and will be retained by the Registrant and furnished to the Securities and Exchange Commission or its staff upon request.

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DOCUMENT AND ENTITY INFORMATION Document - shares	6 Months Ended
	Jun. 30, 2016	Jul. 15, 2016
Document and Entity Information [Abstract]
Entity Registrant Name	POWER INTEGRATIONS INC
Entity Central Index Key	0000833640
Trading Symbol	POWI
Current Fiscal Year End Date	--12-31
Entity Filer Category	Large Accelerated Filer
Document Type	10-Q
Document Period End Date	Jun. 30, 2016
Document Fiscal Year Focus	2016
Document Fiscal Period Focus	Q2
Amendment Flag	false
Entity Common Stock, Shares Outstanding		28,888,357

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CONDENSED CONSOLIDATED BALANCE SHEETS (Unaudited) - USD ($) $ in Thousands	Jun. 30, 2016	Dec. 31, 2015
CURRENT ASSETS:
Cash and cash equivalents	$ 105,343	$ 90,092
Short-term marketable securities	96,891	83,769
Accounts receivable, net of allowances of $511 and $318 in 2016 and 2015, respectively	14,010	7,818
Inventories	46,749	51,934
Prepaid expenses and other current assets	6,478	6,790
Total current assets	269,471	240,403
PROPERTY AND EQUIPMENT, net	95,746	99,381
INTANGIBLE ASSETS, net	34,726	38,165
GOODWILL	91,849	91,849
DEFERRED TAX ASSETS	11,342	11,843
OTHER ASSETS	6,372	5,896
Total assets	509,506	487,537
CURRENT LIABILITIES:
Accounts payable	24,367	21,660
Accrued payroll and related expenses	10,463	9,327
Taxes payable	247	3,620
Deferred income on sales to distributors	16,888	15,101
Other accrued liabilities	2,548	2,285
Total current liabilities	54,513	51,993
LONG-TERM INCOME TAXES PAYABLE	2,666	2,511
DEFERRED TAX LIABILITIES	1,004	1,291
OTHER LIABILITIES	3,315	3,123
Total liabilities	61,498	58,918
COMMITMENTS AND CONTINGENCIES (Notes 11, 12 and 13)
STOCKHOLDERS’ EQUITY:
Common stock	28	28
Additional paid-in capital	151,806	145,366
Accumulated other comprehensive loss	(1,527)	(1,851)
Retained earnings	297,701	285,076
Total stockholders’ equity	448,008	428,619
Total liabilities and stockholders’ equity	$ 509,506	$ 487,537

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CONDENSED CONSOLIDATED BALANCE SHEETS (Unaudited) (PARENTHETICAL) - USD ($) $ in Thousands	Jun. 30, 2016	Dec. 31, 2015
Statement of Financial Position [Abstract]
Accounts receivable, allowance	$ 511	$ 318

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CONDENSED CONSOLIDATED STATEMENTS OF INCOME (Unaudited) - USD ($) shares in Thousands, $ in Thousands		3 Months Ended		6 Months Ended
		Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Income Statement [Abstract]
NET REVENUES		$ 97,169	$ 85,265	$ 182,495	$ 167,822
COST OF REVENUES		49,532	41,247	91,911	81,512
GROSS PROFIT		47,637	44,018	90,584	86,310
OPERATING EXPENSES:
Research and development		15,859	14,864	30,638	29,805
Sales and marketing		12,018	12,459	23,424	24,572
General and administrative		8,133	7,491	15,983	15,772
Total operating expenses		36,010	34,814	70,045	70,149
INCOME FROM OPERATIONS		11,627	9,204	20,539	16,161
OTHER INCOME (EXPENSE)		236	14	497	(209)
INCOME BEFORE INCOME TAXES		11,863	9,218	21,036	15,952
PROVISION FOR INCOME TAXES		598	628	928	1,019
NET INCOME		$ 11,265	$ 8,590	$ 20,108	$ 14,933
EARNINGS PER SHARE:
Basic (in dollars per share)		$ 0.39	$ 0.29	$ 0.70	$ 0.51
Diluted (in dollars per share)	[1]	$ 0.38	$ 0.29	$ 0.68	$ 0.50
SHARES USED IN PER SHARE CALCULATION:
Basic (in shares)		28,850	29,368	28,765	29,339
Diluted (in shares)		29,422	30,034	29,361	30,075

[1] The Company includes the shares underlying performance-based awards in the calculation of diluted earnings per share if the performance conditions have been satisfied as of the end of the reporting period and excludes such shares when the necessary conditions have not been met. The Company has excluded the shares underlying the outstanding performance-based awards in the 2016 and 2015 calculations as the shares were not contingently issuable as of the end of the reporting periods.

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CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (Unaudited) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Statement of Comprehensive Income [Abstract]
NET INCOME	$ 11,265	$ 8,590	$ 20,108	$ 14,933
Other comprehensive income, net of tax:
Foreign currency translation adjustments, net of $0 tax in the three and six months ended June 30, 2016 and 2015	37	(57)	(17)	(22)
Unrealized gain (loss) on marketable securities, net of $0 tax in the three and six months ended June 30, 2016 and 2015	48	(93)	261	(37)
Amortization of defined benefit pension items, net of tax of $11 and $22 in the three and six months ended June 30, 2016, respectively, and $4 and $8 in the three and six months ended June 30, 2015, respectively	40	14	80	28
Total other comprehensive income (loss)	125	(136)	324	(31)
TOTAL COMPREHENSIVE INCOME	$ 11,390	$ 8,454	$ 20,432	$ 14,902

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CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (Unaudited) (PARENTHETICAL) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Statement of Comprehensive Income [Abstract]
Foreign currency translation adjustments, tax	$ 0	$ 0	$ 0	$ 0
Unrealized gain (loss) on marketable securities, tax	0	0	0	0
Amortization of defined benefit pension items, tax	$ 11	$ 4	$ 22	$ 8

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CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (Unaudited) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015
CASH FLOWS FROM OPERATING ACTIVITIES:
Net income	$ 20,108	$ 14,933
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation	8,521	8,067
Amortization of intangibles	3,439	3,515
Loss on disposal of property and equipment	148	0
Stock-based compensation expense	9,428	8,141
Amortization of premium on marketable securities	429	551
Deferred income taxes	214	86
Increase (reduction) in accounts receivable allowances	193	(85)
Tax shortfall associated with employee stock plans	0	189
Change in operating assets and liabilities:
Accounts receivable	(6,385)	(1,050)
Inventories	5,185	1,203
Prepaid expenses and other assets	(639)	1,850
Accounts payable	3,039	6,303
Taxes payable and accrued liabilities	(1,566)	(1,827)
Deferred income on sales to distributors	1,787	1,235
Net cash provided by operating activities	43,901	42,733
CASH FLOWS FROM INVESTING ACTIVITIES:
Purchases of property and equipment	(4,890)	(5,144)
Payment for acquisition, net of cash acquired	0	(15,549)
Purchases of marketable securities	(66,211)	(9,993)
Proceeds from sales and maturities of marketable securities	52,921	29,035
Net cash used in investing activities	(18,180)	(1,651)
CASH FLOWS FROM FINANCING ACTIVITIES:
Issuance of common stock under employee stock plans	3,448	4,375
Repurchase of common stock	(6,435)	(23,176)
Payments of dividends to stockholders	(7,483)	(7,048)
Net cash used in financing activities	(10,470)	(25,849)
NET INCREASE IN CASH AND CASH EQUIVALENTS	15,251	15,233
CASH AND CASH EQUIVALENTS AT BEGINNING OF PERIOD	90,092	60,708
CASH AND CASH EQUIVALENTS AT END OF PERIOD	105,343	75,941
SUPPLEMENTAL DISCLOSURE OF NON-CASH INVESTING AND FINANCING ACTIVITIES:
Unpaid property and equipment	1,140	2,411
Loan applied to CamSemi purchase price	0	6,600
SUPPLEMENTAL DISCLOSURE OF CASH FLOW INFORMATION:
Cash paid for income taxes, net	$ 4,564	$ 2,065

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BASIS OF PRESENTATION

6 Months Ended

Jun. 30, 2016

Organization, Consolidation and Presentation of Financial Statements [Abstract]

BASIS OF PRESENTATION

BASIS OF PRESENTATION:

The condensed consolidated financial statements include the accounts of Power Integrations, Inc., a Delaware corporation (the “Company”), and its wholly owned subsidiaries. Significant intercompany accounts and transactions have been eliminated in consolidation.

While the financial information furnished is unaudited, the condensed consolidated financial statements included in this report reflect all adjustments (consisting only of normal recurring adjustments) that the Company considers necessary for the fair presentation of the results of operations for the interim periods covered and the financial condition of the Company at the date of the interim balance sheet in accordance with accounting principles generally accepted in the United States of America (“U.S. GAAP”). The results for interim periods are not necessarily indicative of the results for the entire year. The condensed consolidated financial statements should be read in conjunction with the Power Integrations, Inc. consolidated financial statements and the notes thereto for the year ended December 31, 2015, included in its Form 10-K filed on February 11, 2016, with the Securities and Exchange Commission.

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SIGNIFICANT ACCOUNTING POLICIES AND RECENT ACCOUNITNG PRONOUNCEMENTS

6 Months Ended

Jun. 30, 2016

Accounting Policies and Recent Accounting Pronouncements [Abstract]

Significant accounting policies and recent accounting pronouncements [Text Block]

SIGNIFICANT ACCOUNTING POLICIES AND RECENT ACCOUNTING PRONOUNCEMENTS:

Significant Accounting Policies

No material changes have been made to the Company's significant accounting policies disclosed in Note 2, Summary of Significant Accounting Policies, in its Annual Report on Form 10-K, filed on February 11, 2016, for the year ended December 31, 2015. The accounting policy information below is to aid in the understanding of the financial information disclosed.

Recent Accounting Pronouncements

In May 2014, the Financial Accounting Standards Board ("FASB") amended the existing accounting standards for revenue recognition, Accounting Standards Update ("ASU") 2014-09, Revenue from Contracts with Customers. The amendments are based on the principle that revenue should be recognized to depict the transfer of promised goods or services to customers in an amount that reflects the consideration to which the entity expects to be entitled in exchange for those goods or services. The Company is required to adopt the amendments in the first quarter of 2018. Early adoption is permitted; however, the Company is not permitted to adopt the standard earlier than January 1, 2017. The amendments may be applied retrospectively to each prior period presented or retrospectively with the cumulative effect recognized as of the date of initial application. The Company is currently evaluating the impact of these amendments and the transition alternatives on its consolidated financial statements.

In July 2015, the FASB amended the existing accounting standards for the measurement of inventory, ASU 2015-11, Inventory. The amendments require inventory to be measured at the lower of cost and net realizable value. Net realizable value is the estimated selling prices in the ordinary course of business, less reasonably predictable costs of completion, disposal, and transportation. The Company is required to adopt the amendments in the first quarter of 2017. The amendments should be applied prospectively with early adoption permitted as of the beginning of an interim or annual reporting period. The Company does not expect that the adoption of these amendments will have a material impact on its consolidated financial statements.

In February 2016, the FASB amended the existing accounting standards for leases, ASU 2016-02, Leases. The amendments require lessees to recognize, on the balance sheet, assets and liabilities for the rights and obligations created by leases of greater than twelve months. The accounting by lessors will remain largely unchanged from that applied under previous U.S. GAAP. The Company is required to adopt the amendments in the first quarter of fiscal 2019, with early adoption permitted. The amendments require a modified retrospective transition approach to recognize and measure leases at the beginning of the earliest period presented. The Company is currently evaluating the impact of these amendments and the transition alternatives on its consolidated financial statements.

In March 2016, the FASB amended the existing accounting standards for stock-based compensation, ASU 2016-09, Compensation-Stock Compensation (Topic 718): Improvements to Employee Share-Based Payment Accounting. The amendments impact several aspects of accounting for share-based payment transactions, including the income tax consequences, forfeitures, classification of awards as either equity or liabilities, and classification on the statement of cash flows. The Company is required to adopt the amendments in the first quarter of 2017, with early adoption permitted. If early adoption is elected, all amendments must be adopted in the same period. The manner of application varies by the various provisions of the guidance, with certain provisions applied on a retrospective or modified retrospective approach, while others are applied prospectively. The Company is currently evaluating the impact of these amendments and the transition alternatives on its consolidated financial statements.

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COMPONENTS OF THE COMPANY'S CONDENSED CONSOLIDATED BALANCE SHEETS

6 Months Ended

Jun. 30, 2016

Balance Sheet Related Disclosures [Abstract]

Supplemental Balance Sheet Disclosures [Text Block]

COMPONENTS OF THE COMPANY’S CONDENSED CONSOLIDATED BALANCE SHEETS:

Accounts Receivable

(In thousands)	June 30, 2016			December 31, 2015
Accounts receivable trade	$	55,772		$	43,622
Accrued ship and debit and rebate claims	(41,251		)	(35,486		)
Allowance for doubtful accounts	(511		)	(318		)
Total	$	14,010		$	7,818

Inventories

(In thousands)	June 30, 2016		December 31, 2015
Raw materials	$	12,938	$	19,090
Work-in-process	14,227		12,770
Finished goods	19,584		20,074
Total	$	46,749	$	51,934

Prepaid Expenses and Other Current Assets

(In thousands)	June 30, 2016		December 31, 2015
Prepaid legal fees	$	200	$	2,023
Prepaid income tax	855		309
Prepaid maintenance agreements	1,463		736
Interest receivable	401		519
Advance to suppliers	313		324
Other	3,246		2,879
Total	$	6,478	$	6,790

Intangible Assets

	June 30, 2016							December 31, 2015
(In thousands)	Gross		Accumulated Amortization			Net		Gross		Accumulated Amortization			Net
Domain name	$	1,261	$	—		$	1,261	$	1,261	$	—		$	1,261
In-process research and development	4,690		—			4,690		4,690		—			4,690
Technology licenses	3,000		(3,000		)	—		3,000		(2,925		)	75
Developed technology	33,270		(13,577		)	19,693		33,270		(11,670		)	21,600
Customer relationships	20,030		(11,308		)	8,722		20,030		(10,031		)	9,999
In-place leases	660		(300		)	360		660		(120		)	540
Total intangible assets	$	62,911	$	(28,185	)	$	34,726	$	62,911	$	(24,746	)	$	38,165

The estimated future amortization expense related to finite-lived intangible assets at June 30, 2016, is as follows:

Fiscal Year	Estimated Amortization (in thousands)
2016 (remaining 6 months)	$	3,223
2017	6,084
2018	5,152
2019	4,753
2020	3,528
Thereafter	6,035
Total (1)	$	28,775

_______________

(1) The total above excludes $4.7 million of in-process research and development that will be amortized, upon completion of development, over the estimated useful life of the technology.

Accumulated Other Comprehensive Income (Loss)

Changes in accumulated other comprehensive income (loss) for the three and six months ended June 30, 2016 and 2015, was as follows:

	Unrealized Gains and Losses on Marketable Securities					Defined Benefit Pension Items										Foreign Currency Items						Total
	Three Months Ended					Three Months Ended										Three Months Ended						Three Months Ended
	June 30,					June 30,										June 30,						June 30,
(In thousands)	2016		2015			2016					2015					2016			2015			2016			2015
Beginning balance	$	116	$	139		$	(1,544	)			$	(1,226	)			$	(224	)	$	56		$	(1,652	)	$	(1,031	)
Other comprehensive income (loss) before reclassifications	48		(93		)	—					—					37			(57		)	85			(150		)
Amounts reclassified from accumulated other comprehensive income (loss)	—		—			40			(1	)	14			(1	)	—			—			40			14
Net-current period other comprehensive income (loss)	48		(93		)	40					14					37			(57		)	125			(136		)
Ending balance	$	164	$	46		$	(1,504	)			$	(1,212	)			$	(187	)	$	(1	)	$	(1,527	)	$	(1,167	)

_______________

(1) This component of accumulated other comprehensive income (loss) is included in the computation of net periodic pension cost for the three months ended June 30, 2016 and 2015.

	Unrealized Gains and Losses on Marketable Securities						Defined Benefit Pension Items										Foreign Currency Items						Total
	Six Months Ended						Six Months Ended										Six Months Ended						Six Months Ended
	June 30,						June 30,										June 30,						June 30,
(In thousands)	2016			2015			2016					2015					2016			2015			2016			2015
Beginning balance	$	(97	)	$	83		$	(1,584	)			$	(1,240	)			$	(170	)	$	21		$	(1,851	)	$	(1,136	)
Other comprehensive income (loss) before reclassifications	261			(37		)	—					—					(17		)	(22		)	244			(59		)
Amounts reclassified from accumulated other comprehensive income (loss)	—			—			80			(1	)	28			(1	)	—			—			80			28
Net-current period other comprehensive income (loss)	261			(37		)	80					28					(17		)	(22		)	324			(31		)
Ending balance	$	164		$	46		$	(1,504	)			$	(1,212	)			$	(187	)	$	(1	)	$	(1,527	)	$	(1,167	)

_______________

(1) This component of accumulated other comprehensive income (loss) is included in the computation of net periodic pension cost for the six months ended June 30, 2016 and 2015.

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FAIR VALUE MEASUREMENTS

6 Months Ended

Jun. 30, 2016

Fair Value Disclosures [Abstract]

FAIR VALUE MEASUREMENTS

FAIR VALUE MEASUREMENTS:

The FASB established a three-tier value hierarchy, which prioritizes the inputs used in measuring fair value as follows: (Level 1) observable inputs such as quoted prices for identical assets in active markets; (Level 2) inputs other than the quoted prices in active markets that are observable either directly or indirectly; and (Level 3) unobservable inputs in which there is little or no market data, which requires the Company to develop its own assumptions. This hierarchy requires the Company to use observable market data, when available, and to minimize the use of unobservable inputs when determining fair value.

The Company's cash equivalents and short-term marketable securities are classified within Level 1 or Level 2 of the fair-value hierarchy because they are valued using quoted market prices, broker or dealer quotations, or alternative pricing sources with reasonable levels of price transparency.

    The fair-value hierarchy of the Company's cash equivalents and marketable securities at June 30, 2016, and December 31, 2015, was as follows:

	Fair Value Measurement at
	June 30, 2016
(In thousands)	Total Fair Value		Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)
Commercial paper	$	55,800	$	—	$	55,800
Money market funds	770		770		—
Corporate securities	80,393		—		80,393
Total	$	136,963	$	770	$	136,193

	Fair Value Measurement at
	December 31, 2015
(In thousands)	Total Fair Value		Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)
Commercial paper	$	21,194	$	—	$	21,194
Money market funds	104		104		—
Corporate securities	83,769		—		83,769
Total	$	105,067	$	104	$	104,963

The Company did not transfer any investments between Level 1 and Level 2 of the fair-value hierarchy in the six months ended June 30, 2016, and the twelve months ended December 31, 2015.

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MARKETABLE SECURITITES

6 Months Ended

Jun. 30, 2016

Marketable Securities [Abstract]

Investments in Debt and Marketable Equity Securities (and Certain Trading Assets) Disclosure

MARKETABLE SECURITIES:

Amortized cost and estimated fair market value of marketable securities classified as available-for-sale (excluding cash equivalents) at June 30, 2016, were as follows:

	Amortized Cost		Gross Unrealized					Estimated Fair Market Value
(In thousands)			Gains		Losses
Investments due in less than 3 months:
Commercial paper	$	8,189	$	—	$	—		$	8,189
Corporate securities	14,027		—		(3		)	14,024
Total	22,216		—		(3		)	22,213
Investments due in 4-12 months:
Commercial paper	8,309		—		—			8,309
Corporate securities	33,591		50		—			33,641
Total	41,900		50		—			41,950
Investments due between 12 months and 5 years:
Corporate securities	32,611		117		—			32,728
Total	32,611		117		—			32,728
Total marketable securities	$	96,727	$	167	$	(3	)	$	96,891

Amortized cost and estimated fair market value of marketable securities classified as available-for-sale (excluding cash equivalents) at December 31, 2015, were as follows:    

	Amortized Cost		Gross Unrealized					Estimated Fair Market Value
(In thousands)			Gains		Losses
Investments due in less than 3 months:
Corporate securities	$	38,586	$	7	$	(10	)	$	38,583
Total	38,586		7		(10		)	38,583
Investments due in 4-12 months:
Corporate securities	33,654		1		(36		)	33,619
Total	33,654		1		(36		)	33,619
Investments due between 12 months and 5 years:
Corporate securities	11,626		—		(59		)	11,567
Total	11,626		—		(59		)	11,567
Total marketable securities	$	83,866	$	8	$	(105	)	$	83,769

As of June 30, 2016, and December 31, 2015, the Company evaluated the nature of the investments with a loss position, which were primarily high-quality corporate securities, and determined the unrealized losses were not other-than-temporary.

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STOCK-BASED COMPENSATION

6 Months Ended

Jun. 30, 2016

Disclosure of Compensation Related Costs, Share-based Payments [Abstract]

STOCK PLANS AND SHARE-BASED COMPENSATION

STOCK-BASED COMPENSATION:

The following table summarizes the stock-based compensation expense recognized in accordance with ASC 718-10 for the three and six months ended June 30, 2016, and June 30, 2015:

	Three Months Ended				Six Months Ended
	June 30,				June 30,
(In thousands)	2016		2015		2016		2015
Cost of revenues	$	293	$	257	$	383	$	506
Research and development	1,940		1,306		3,409		2,697
Sales and marketing	899		878		1,926		1,890
General and administrative	1,880		1,309		3,710		3,048
Total stock-based compensation expense	$	5,012	$	3,750	$	9,428	$	8,141

Stock-based compensation expense in the three months ended June 30, 2016 was $5.0 million (comprising approximately $0.1 million related to stock options, $1.6 million related to performance-based (PSU) awards and long-term performance-based (PRSU) awards, $3.0 million related to restricted stock unit (RSU) awards and $0.3 million related to the Company’s employee stock purchase plan). In the six months ended June 30, 2016, stock compensation expense was $9.4 million (comprising approximately $0.2 million related to stock options, $2.3 million related to PSUs and PRSUs, $6.3 million related to RSUs and $0.6 million related to the Company’s employee stock purchase plan).

Stock-based compensation expense in the three months ended June 30, 2015 was $3.8 million (comprising approximately $0.2 million related to stock options, $0.2 million related to PSUs and PRSUs, $3.1 million related to RSUs and $0.3 million related to the Company’s employee stock purchase plan). In the six months ended June 30, 2015, stock-based compensation expense was $8.1 million (comprising approximately $0.4 million related to stock options, $0.8 million related to PSUs and PRSUs, $6.3 million related to RSUs and $0.6 million related to the Company’s employee stock purchase plan).

Stock Options

A summary of stock options outstanding as of June 30, 2016, and activity during the six months then ended, is presented below:

	Shares (in thousands)		Weighted- Average Exercise Price		Weighted-Average Remaining Contractual Term (in years)	Aggregate Intrinsic Value (in thousands)
Outstanding at January 1, 2016	1,030		$	27.58
Granted	—		$	—
Exercised	(44	)	$	23.31
Forfeited or expired	—		$	—
Outstanding at June 30, 2016	986		$	27.77	2.76	$	21,911
Exercisable at June 30, 2016	986		$	27.77	2.76	$	21,911
Vested and expected to vest at June 30, 2016	986		$	27.77	2.76	$	21,911

PSU Awards

Under the performance-based awards program, the Company grants awards in the performance year in an amount equal to twice the target number of shares to be issued if the maximum performance metrics are met. The number of shares that are released at the end of the performance year can range from zero to 200% of the target number depending on the Company’s performance. The performance metrics of this program are annual targets consisting of a combination of net revenue, non-GAAP operating income and strategic goals.

As the net revenue, non-GAAP operating income and strategic goals are considered performance conditions, expense associated with these awards, net of estimated forfeitures, is recognized over the service period based on an assessment of the achievement of the performance targets. The fair value of these PSUs is determined using the fair value of the Company’s common stock on the date of the grant, reduced by the discounted present value of dividends expected to be declared before the awards vest. If the performance conditions are not achieved, no compensation cost is recognized and any previously recognized compensation is reversed.

In January 2016, it was determined that approximately 11,000 shares of the PSUs granted in 2015, vested in aggregate and were released to the Company’s employees and executives in the first quarter of 2016.

A summary of PSUs outstanding as of June 30, 2016, and activity during the six months then ended, is presented below:

	Shares (in thousands)		Weighted-Average Grant Date Fair Value Per Share		Weighted-Average Remaining Contractual Term (in years)	Aggregate Intrinsic Value (in thousands)
Outstanding at January 1, 2016	11		$	52.35
Granted	100		$	46.12
Vested	(11	)	$	52.35
Forfeited	—		$	—
Outstanding at June 30, 2016	100		$	46.12	0.50	$	4,983
Outstanding and expected to vest at June 30, 2016	97				0.50	$	4,834

PRSU Awards

      The Company's PRSU program provides for the issuance of PRSUs which will vest based on the Company's performance measured against the PRSU program's established revenue targets. PRSUs are granted in an amount equal to twice the target number of shares to be issued if the maximum performance metrics are met. The actual number of shares the recipient receives is determined at the end of a three-year performance period based on results achieved versus the Company's performance goals, and may range from zero to 200% of the target number. The performance goals for PRSUs granted in fiscal 2014, 2015 and 2016 were based on the Company’s annual revenue growth over the respective three-year performance period.

Expense associated with these awards, net of estimated forfeitures, is recorded throughout the year depending on the number of shares expected to vest based on progress toward the performance target. If the performance conditions are not achieved, no compensation cost is recognized and any previously recognized compensation is reversed.

A summary of PRSUs outstanding as of June 30, 2016, and activity during the six months then ended, is presented below:

	Shares (in thousands)	Weighted-Average Grant Date Fair Value Per Share		Weighted-Average Remaining Contractual Term (in years)	Aggregate Intrinsic Value (in thousands)
Outstanding at January 1, 2016	129	$	53.75
Granted	78	$	43.26
Vested	—	$	—
Forfeited	—	$	—
Outstanding at June 30, 2016	207	$	49.78	1.60	$	10,351
Outstanding and expected to vest at June 30, 2016	96			1.57	$	4,777

RSU Awards

A summary of RSUs outstanding as of June 30, 2016, and activity during the six months then ended, is presented below:

	Shares (in thousands)		Weighted- Average Grant Date Fair Value Per Share		Weighted-Average Remaining Contractual Term (in years)	Aggregate Intrinsic Value (in thousands)
Outstanding at January 1, 2016	681		$	46.98
Granted	297		$	45.82
Vested	(251	)	$	45.14
Forfeited	(11	)	$	46.75
Outstanding at June 30, 2016	716		$	47.15	1.70	$	35,789
Outstanding and expected to vest at June 30, 2016	657				1.65	$	32,829

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SIGNIFICANT CUSTOMERS AND INTERNATIONAL SALES

6 Months Ended

Jun. 30, 2016

Risks and Uncertainties [Abstract]

SIGNIFICANT CUSTOMERS AND INTERNATIONAL SALES

SIGNIFICANT CUSTOMERS AND INTERNATIONAL SALES:

Segment Reporting

The Company is organized and operates as one reportable segment, the design, development, manufacture and marketing of integrated circuits and related components for use primarily in the high-voltage power-conversion market. The Company’s chief operating decision maker, the Chief Executive Officer, reviews financial information presented on a consolidated basis for purposes of making operating decisions and assessing financial performance.

Customer Concentration

The Company's top ten customers accounted for approximately 63% and 62% of net revenues for the three and six months ended June 30, 2016, respectively and approximately 62% and 60% of net revenues, respectively, in the corresponding periods of the previous year. A significant portion of these revenues are attributable to sales of the Company’s products to distributors of electronic components. These distributors sell the Company’s products to a broad, diverse range of end users, including original equipment manufacturers (OEMs) and merchant power supply manufacturers.

In the three and six months ended June 30, 2016, two customers, both distributors of the Company's products, accounted for more than 10% of the Company’s net revenues. In the three and six months ended June 30, 2015, one customer, also a distributor, accounted for more than 10% of net revenues.

The following table discloses these customers’ percentage of revenues for the respective periods:

	Three Months Ended				Six Months Ended
	June 30,				June 30,
Customer	2016		2015		2016		2015
Avnet	19	%	22	%	20	%	22	%
Powertech Distribution Ltd.	13	%	*		13	%	*

_______________                        

* Total customer percentage of revenues was less than 10%.

No other customers accounted for 10% or more of the Company’s net revenues in the periods presented.

Concentration of Credit Risk

Financial instruments that potentially subject the Company to concentrations of credit risk consist principally of cash investments and trade receivables. The Company does not have any off-balance-sheet credit exposure related to its customers. As of June 30, 2016, and December 31, 2015, 70% and 66%, respectively, of accounts receivable were concentrated with the Company’s top 10 customers.

The following customers represented 10% or more of accounts receivable:

Customer	June 30, 2016		December 31, 2015
Avnet	25	%	20	%
ATM Electronic Corporation	13	%	10	%

International Sales

The Company markets its products globally through its sales personnel and a worldwide network of independent sales representatives and distributors. As a percentage of total net revenues, international sales, which consist of sales to distributors and direct customers outside of the United States of America, comprise the following:

	Three Months  Ended				Six Months Ended
	June 30,				June 30,
	2016		2015		2016		2015
Hong Kong/China	51	%	51	%	50	%	49	%
Taiwan	14	%	14	%	13	%	13	%
Korea	10	%	8	%	11	%	10	%
Western Europe (excluding Germany)	11	%	11	%	11	%	11	%
Japan	5	%	6	%	5	%	6	%
Germany	2	%	2	%	2	%	2	%
Other	3	%	3	%	4	%	4	%
Total foreign revenue	96	%	95	%	96	%	95	%

The remainder of the Company’s sales is to customers within the United States of America.

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COMMON STOCK REPURCHASES AND CASH DIVIDENDS

6 Months Ended

Jun. 30, 2016

Common Stock Repurchases and Cash Dividends [Abstract]

Common Stock Repurchase and Cash Dividends [Text Block]

COMMON STOCK REPURCHASES AND CASH DIVIDENDS:

Common Stock Repurchases

In the six months ended June 30, 2016, the Company purchased approximately 146,000 shares of the Company’s common stock for $6.4 million. As of June 30, 2016, the Company had approximately $23.6 million remaining under the repurchase program, which has no expiration date. Authorization of future repurchase programs is at the discretion of the board of directors and will depend on the Company’s financial condition, results of operations, capital requirements, business conditions and other factors.

Cash Dividends

In January 2016, the Company’s board of directors declared four quarterly cash dividends in the amount of $0.13 per share to be paid to stockholders of record at the end of each quarter in 2016.

	Three Months Ended				Six Months Ended
(In thousands, except per share amounts)	June 30, 2016		June 30, 2015		June 30, 2016		June 30, 2015
Dividends declared and paid	$	3,754	$	3,529	$	7,483	$	7,048
Dividends declared per common share	$	0.13	$	0.12	$	0.26	$	0.24

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EARNINGS PER SHARE

6 Months Ended

Jun. 30, 2016

Earnings Per Share [Abstract]

EARNINGS PER SHARE

EARNINGS PER SHARE:

Basic earnings per share are calculated by dividing net income by the weighted-average shares of common stock outstanding during the period. Diluted earnings per share are calculated by dividing net income by the weighted-average shares of common stock and dilutive common equivalent shares outstanding during the period. Dilutive common equivalent shares included in this calculation consist of dilutive shares issuable upon the assumed exercise of outstanding common stock options, the assumed vesting of outstanding restricted stock units and both short- and long-term performance-based awards, and the assumed issuance of awards under the stock purchase plan, as computed using the treasury stock method.

A summary of the earnings per share calculation is as follows:    

	Three Months Ended				Six Months Ended
	June 30,				June 30,
(In thousands, except per share amounts)	2016		2015		2016		2015
Basic earnings per share:
Net income	$	11,265	$	8,590	$	20,108	$	14,933
Weighted-average common shares	28,850		29,368		28,765		29,339
Basic earnings per share	$	0.39	$	0.29	$	0.70	$	0.51
Diluted earnings per share: (1)
Net income	$	11,265	$	8,590	$	20,108	$	14,933
Weighted-average common shares	28,850		29,368		28,765		29,339
Effect of dilutive awards:
Employee stock plans	572		666		596		736
Diluted weighted-average common shares	29,422		30,034		29,361		30,075
Diluted earnings per share	$	0.38	$	0.29	$	0.68	$	0.50

_______________

(1) The Company includes the shares underlying performance-based awards in the calculation of diluted earnings per share if the performance conditions have been satisfied as of the end of the reporting period and excludes such shares when the necessary conditions have not been met. The Company has excluded the shares underlying the outstanding performance-based awards in the 2016 and 2015 calculations as the shares were not contingently issuable as of the end of the reporting periods. 

In the three and six months ended June 30, 2016 and 2015, no outstanding stock awards were determined to be anti-dilutive and therefore excluded from the computation of diluted earnings per share.

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PROVISION FOR INCOME TAXES

6 Months Ended

Jun. 30, 2016

Income Tax Disclosure [Abstract]

PROVISION FOR INCOME TAXES

PROVISION FOR INCOME TAXES:

Income-tax expense includes a provision for federal, state and foreign taxes based on the annual estimated effective tax rate applicable to the Company and its subsidiaries, adjusted for certain discrete items which are fully recognized in the period they occur.

The Company's effective tax rates for the three and six months ended June 30, 2016, were 5.0% and 4.4%, respectively. The difference between the statutory rate of 35% and the Company’s effective tax rates for the three and six months ended June 30, 2016, was due primarily to the beneficial impact of the geographic distribution of the Company’s world-wide earnings and the federal research and development tax credit which was permanently extended in December 2015. The Company's effective tax rates for the three and six months ended June 30, 2015, were 6.8% and 6.4%, respectively. The difference between the expected statutory rate of 35% and the Company's effective tax rates for the three and six months ended June 30, 2015, was due primarily to the beneficial impact of the geographic distribution of the Company's world-wide earnings.

As of June 30, 2016, the Company maintained a valuation allowance on its California deferred tax assets, New Jersey deferred tax assets, capital losses for federal purposes and a valuation allowance with respect to its deferred tax assets relating to tax credits in Canada.

To ensure an additional source of U.S. cash, the Company plans to repatriate a portion of its current year offshore earnings to the U.S. for domestic operations. The Company has accordingly provided for the estimated federal and state income taxes on such portion of its current year offshore earnings. If circumstances change and it becomes apparent that some or all of the undistributed earnings of the Company’s offshore subsidiary will be remitted in the foreseeable future but income taxes have not been recognized, the Company will accrue income taxes attributable to such undistributed earnings.

Determining the consolidated provision for income tax expense, income tax liabilities and deferred tax assets and liabilities involves judgment. The Company calculates and provides for income taxes in each of the tax jurisdictions in which it operates, which involves estimating current tax exposures as well as making judgments regarding the recoverability of deferred tax assets in each jurisdiction. The estimates used could differ from actual results, which may have a significant impact on operating results in future periods.

On July 27, 2015, in Altera Corp. v. Commissioner, the U.S. Tax Court issued an opinion related to the treatment of stock-based compensation expense in an intercompany cost-sharing arrangement. A final decision was issued by the Tax Court in December 2015. In February 2016, the Commissioner appealed the Tax Court decision. At this time, the U.S. Department of the Treasury has not withdrawn the requirement to include stock-based compensation expense from IRS cost-sharing regulations. The Company has reviewed this case and its impact and concluded that no adjustment to the consolidated financial statements is appropriate at this time. The Company will continue to monitor ongoing developments and potential impacts to the consolidated financial statements.

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COMMITMENTS

6 Months Ended

Jun. 30, 2016

Commitments and Contingencies Disclosure [Abstract]

COMMITMENTS

COMMITMENTS:

Supplier Agreements

Under the terms of the Company's wafer-supply agreements with Seiko Epson Corporation ("Epson"), and ROHM Lapis Semiconductor Co., Ltd. ("Lapis") the wafers purchased from these suppliers are priced in U.S. dollars; however, these agreements also allow for mutual sharing of the impact of the exchange rate fluctuation between Japanese yen and the U.S. dollar on future purchases. Each year, the Company's management and these two suppliers review and negotiate future pricing; the negotiated pricing is denominated in U.S. dollars but is subject to contractual exchange rate provisions. The fluctuation in the exchange rate is shared equally between the Company and each of these suppliers on future purchases.

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LEGAL PROCEEDINGS AND CONTINGENCIES

6 Months Ended

Jun. 30, 2016

Commitments and Contingencies Disclosure [Abstract]

LEGAL PROCEEDINGS AND CONTINGENCIES

LEGAL PROCEEDINGS AND CONTINGENCIES:

From time to time in the ordinary course of business, the Company becomes involved in lawsuits, or customers and distributors may make claims against the Company. In accordance with ASC 450-10, Contingencies, the Company makes a provision for a liability when it is both probable that a liability has been incurred and the amount of the loss can be reasonably estimated.

On October 20, 2004, the Company filed a complaint against Fairchild Semiconductor International, Inc. and Fairchild Semiconductor Corporation (referred to collectively as “Fairchild”) in the United States District Court for the District of Delaware. In its complaint, the Company alleged that Fairchild has and is infringing four of Power Integrations’ patents pertaining to pulse width modulation (PWM) integrated circuit devices. Fairchild denied infringement and asked for a declaration from the court that it does not infringe any Power Integrations patent and that the patents are invalid. The Court issued a claim construction order on March 31, 2006 which was favorable to the Company. The Court set a first trial on the issues of infringement, willfulness and damages for October 2, 2006. At the close of the first trial, on October 10, 2006, the jury returned a verdict in favor of the Company finding all asserted claims of all four patents-in-suit to be willfully infringed by Fairchild and awarding $34.0 million in damages. Fairchild raised defenses contending that the asserted patents are invalid or unenforceable, and the Court held a second trial on these issues beginning on September 17, 2007. On September 21, 2007, the jury returned a verdict in the Company’s favor, affirming the validity of the asserted claims of all four patents-in-suit. Fairchild submitted further materials on the issue of enforceability along with various other post-trial motions, and the Company filed post-trial motions seeking a permanent injunction and increased damages and attorneys’ fees, among other things. On September 24, 2008, the Court denied Fairchild’s motion regarding enforceability and ruled that all four patents are enforceable. On December 12, 2008, the Court ruled on the remaining post-trial motions, including granting a permanent injunction, reducing the damages award to $6.1 million, granting Fairchild a new trial on the issue of willful infringement in view of an intervening change in the law, and denying the Company’s motion for increased damages and attorneys’ fees with leave to renew the motion after the resolution of the issue of willful infringement. On December 22, 2008, at Fairchild’s request, the Court temporarily stayed the permanent injunction for 90 days. On January 12, 2009, Fairchild filed a notice of appeal challenging the Court’s refusal to enter a more permanent stay of the injunction, and Fairchild filed additional motions requesting that both the Federal Circuit and the District Court extend the stay of injunction. The District Court temporarily extended the stay pending the Federal Circuit ruling on Fairchild’s pending motion, but the Federal Circuit dismissed Fairchild’s appeal and denied its motion on May 5, 2009, and the District Court issued an order on May 13, 2009 confirming the reinstatement of the permanent injunction as originally entered in December 2008. On June 22, 2009, the Court held a brief bench re-trial on the issue of willful infringement. On July 22, 2010, the Court found that Fairchild willfully infringed all four of the asserted patents, and the Court also invited briefing on enhanced damages and attorneys’ fees. Fairchild also filed a motion requesting that the Court amend its findings regarding willfulness. On January 18, 2011, the Court denied Fairchild’s request to amend the findings regarding Fairchild’s willful infringement and doubled the damages award against Fairchild but declined to award attorneys’ fees. On February 3, 2011, the Court entered final judgment in favor of the Company for a total damages award of $12.9 million. Fairchild filed a notice of appeal challenging the final judgment and a number of the underlying rulings, and the Company filed a cross-appeal seeking to increase the damages award. The appeal was argued on January 11, 2012, and the Federal Circuit issued a mixed ruling on March 26, 2013, affirming Fairchild’s infringement of certain claims that support the basis for the permanent injunction while reversing, vacating, and remanding the findings with respect to other claims, including the Company’s claim for damages. The Company filed a petition seeking Supreme Court review of the Federal Circuit’s ruling on damages issues, and the Supreme Court called for a response from Fairchild but ultimately declined to review the case. On remand, the Company intends to pursue its claim for financial compensation based on Fairchild’s infringement.

On May 9, 2005, the Company filed a Complaint with the U.S. International Trade Commission (ITC) under section 337 of the Tariff Act of 1930, as amended, 19 U.S.C. Section 1337 against System General (SG). The Company filed a supplement to the complaint on May 24, 2005. The Company alleged infringement of its patents pertaining to PWM integrated circuit devices produced by SG, which are used in power conversion applications such as power supplies for computer monitors. The Commission instituted an investigation on June 8, 2005 in response to the Company’s complaint. SG filed a response to the ITC complaint asserting that the patents-in-suit were invalid and not infringed. The Company subsequently and voluntarily narrowed the number of patents and claims in suit, which proceeded to a hearing. The hearing on the investigation was held before the Administrative Law Judge (ALJ) from January 18 to January 24, 2006. Post-hearing briefs were submitted and briefing concluded February 24, 2006. The ALJ’s initial determination was issued on May 15, 2006. The ALJ found all remaining asserted claims valid and infringed, and recommended the exclusion of the infringing products as well as certain downstream products that contain the infringing products. After further briefing, on June 30, 2006, the Commission decided not to review the initial determination on liability, but did invite briefs on remedy, bonding and the public interest. On August 11, 2006, the Commission issued an order excluding from entry into the United States the infringing SG PWM chips, and any liquid-crystal-display (LCD) computer monitors, AC printer adapters and sample/demonstration circuit boards containing an infringing SG chip. The U.S. Customs Service is authorized to enforce the exclusion order. On October 11, 2006, the presidential review period expired without any action from the President, and the ITC exclusion order is now in full effect. SG appealed the ITC decision, and on November 19, 2007, the Federal Circuit affirmed the ITC’s findings in all respects. On October 27, 2008, SG filed a petition to modify the exclusion order in view of a recent Federal Circuit opinion in an unrelated case, and the Company responded to oppose any modification, but the Commission modified the exclusion order on February 27, 2009. Nevertheless, the exclusion order still prohibits SG and related entities from importing the infringing SG chips and any LCD computer monitors, AC printer adapters, and sample/demonstration circuit boards containing an infringing SG chip.

On May 23, 2008, the Company filed a complaint against Fairchild Semiconductor International, Inc., Fairchild Semiconductor Corporation, and Fairchild’s wholly owned subsidiary System General Corporation (referred to collectively as “Fairchild”), in the United States District Court for the District of Delaware. In its complaint, the Company alleged that Fairchild has infringed and is infringing three patents pertaining to power supply controller integrated circuit devices. Fairchild answered the Company’s complaint on November 7, 2008, denying infringement and asking for a declaration from the Court that it does not infringe any Power Integrations patent and that the patents are invalid and unenforceable. Fairchild’s answer also included counterclaims accusing the Company of infringing three patents pertaining to primary side power conversion integrated circuit devices. Fairchild had earlier brought these same claims in a separate suit against the Company, also in Delaware, which Fairchild dismissed in favor of adding its claims to the Company’s already pending suit against Fairchild. The Company has answered Fairchild’s counterclaims, denying infringement and asking for a declaration from the Court that it does not infringe any Fairchild patent and that the Fairchild patents are invalid. Fairchild also filed a motion to stay the case, but the Court denied that motion on December 19, 2008. On March 5, 2009, Fairchild filed a motion for summary judgment to preclude any recovery for post-verdict sales of parts found to infringe in the parties’ other ongoing litigation, described above, and the Company filed its opposition and a cross-motion to preclude Fairchild from re-litigating the issues of infringement and damages for those same products. On June 26, 2009, the Court held a hearing on the parties’ motions, and on July 9, 2009 the Court issued an order denying the parties’ motions but staying proceedings with respect to the products that were found to infringe and which are subject to the injunction in the other Delaware case between the parties pending the entry of final judgment in that case; those products are expected to be addressed in the context of the parties’ remand proceedings following the appeal in their earlier litigation in Delaware, and the remainder of the case is proceeding. On December 18, 2009, the Court issued an order construing certain terms in the asserted claims of the Company’s and Fairchild’s patents in suit. Following the Court’s ruling on claim construction, Fairchild withdrew its claim related to one of its patents and significantly reduced the number of claims asserted for the remaining two patents. The parties thereafter filed and argued a number of motions for summary judgment, and the Court denied the majority of the parties’ motions but granted the Company’s motion to preclude Fairchild from re-arguing validity positions that were rejected in the prior case between the parties. Because the assigned Judge retired at the end of July 2010, the case was re-assigned to a different Judge, and the Court vacated the trial schedule and had the parties provide their input on the appropriate course of action. The Court thereafter set a trial schedule with the jury trial on infringement and validity to begin in July 2011. On April 18, 2011, the Court rescheduled the trial to begin in January 2012, and on June 2, 2011, the Court moved the trial date to April 2012 to permit the parties to address another patent the Company accused Fairchild of infringing. Following a trial in April 2012, the jury returned a verdict finding that Fairchild infringes two of the Company’s patents, that Fairchild has induced others to infringe the Company’s patents, and also upheld the validity of the infringed patents. Of the two remaining counterclaim patents Fairchild asserted in the case, one was found not to be infringed, but the jury found the second patent to be infringed by a limited number of the Company’s products, although the jury further found the Company did not induce infringement by any customers, including customers outside the United States. On March 29, 2013, the District Court denied most of the parties’ post-trial motions on liability but granted the Company’s motion for judgment as a matter of law finding that Fairchild infringed another of the Company’s patents. On April 25, 2013, the Court denied both parties’ motions regarding the unenforceability of each other’s patents. The Company is challenging adverse findings on appeal; nevertheless, the Company estimates that even if the verdict on Fairchild’s patent were ultimately upheld, the sales potentially impacted would amount to less than 0.5% of the Company’s revenues. The Company requested an injunction preventing further infringement of its own patents by Fairchild, and Fairchild requested an injunction as well. Following a hearing on the issue in June 2014, the Court denied Fairchild’s request for an injunction against the Company and granted the Company’s request for an injunction against Fairchild. On January 13, 2015, the District Court entered final judgment on the liability and validity issues discussed above, and both parties filed appeals with the Federal Circuit. Briefing on the appeal has been completed, and oral argument on the appeal took place in early July 2016, with rulings expected in the coming months. The Company is also seeking financial damages, as well as enhanced damages for willful infringement; these issues are to be decided in separate proceedings at a later date.

On June 28, 2004, the Company filed a complaint for patent infringement in the U.S. District Court, Northern District of California, against SG Corporation, a Taiwanese company, and its U.S. subsidiary. The Company’s complaint alleged that certain integrated circuits produced by SG infringed and continue to infringe certain of its patents. On June 10, 2005, in response to the initiation of the International Trade Commission (ITC) investigation discussed above, the District Court stayed all proceedings. Subsequent to the completion of the ITC proceedings, the District Court temporarily lifted the stay and scheduled a case management conference. On December 6, 2006, SG filed a notice of appeal of the ITC decision as discussed above. In response, and by agreement of the parties, the District Court vacated the scheduled case management conference and renewed the stay of proceedings pending the outcome of the Federal Circuit appeal of the ITC determination. On November 19, 2007, the Federal Circuit affirmed the ITC’s findings in all respects, and SG did not file a petition for review. The parties subsequently filed a motion to dismiss the District Court case without prejudice. On November 4, 2009, the Company re-filed its complaint for patent infringement against SG and its parent corporations, Fairchild Semiconductor International, Inc. and Fairchild Semiconductor Corporation, to address their continued infringement of patents at issue in the original suit that recently emerged from SG requested reexamination proceedings before the U.S. Patent and Trademark Office (USPTO). The Company seeks, among other things, an order enjoining SG and Fairchild from infringing the Company’s patents and an award of damages resulting from the alleged infringement. Fairchild has denied infringement and asked for a declaration from the Court that it does not infringe any Power Integrations patent, that the patents are invalid, and that one of the two of the Company’s patents now at issue in the case is unenforceable. On May 5, 2010, SG and Fairchild filed an amended answer including counterclaims accusing the Company of infringing two patents, and since that time Fairchild has withdrawn its claim for infringement of one of the patents it originally asserted against the Company but added another patent to the case over the Company’s objections; the Company contests these claims vigorously. Both parties filed summary judgment motions and challenges to each other’s experts’ testimony, and the Court granted the Company’s motion for summary judgment of non-infringement with respect to one of Fairchild’s two patents. Following a trial on the remaining claims in February 2014, the jury returned a verdict in the Company’s favor, affirming the validity of the asserted claims of the Company’s patents-in-suit, finding that SG and Fairchild infringed the Company’s asserted patents and induced infringement by others, and awarding $105.0 million in damages. The Jury also rejected Fairchild’s remaining counterclaims for infringement against the Company. Fairchild challenged these rulings in post-trial motions, but the judge confirmed the jury’s determinations on infringement and damages, although the Court declined to find Fairchild’s infringement willful. Fairchild also pressed its unenforceability claim with respect to one of the two patents it was found to infringe in post-trial briefing, but the Court rejected Fairchild’s unenforceability claim. Fairchild also requested reconsideration of the damages determinations, and the Court granted a new trial with respect to damages but none of the other issues addressed in the previous trial, with the retrial scheduled for December 2015. Thereafter, the parties completed pretrial proceedings challenging each other’s experts, and the Court granted portions of each party’s motions limiting the scope of expert testimony for purposes of the damages retrial, but neither party was successful in their efforts to prevent the other side’s experts from testifying at trial. Following a retrial on the issue of damages in December 2015, the jury returned a verdict in the Company’s favor, finding that the Company’s patented technology created the basis for customer demand for the infringing Fairchild products and awarding $139.8 million in damages. Although the jury awarded damages, at this stage of the proceedings the Company cannot state the amount, if any, it might ultimately recover from Fairchild, and no benefits have been recorded in the Company’s consolidated financial statements as a result of the damages verdict. The Company has filed a motion requesting enhanced damages and attorney fees; Fairchild has also filed a post-trial motion to challenge the verdict. The Court held an initial hearing on the parties’ post-trial motions in June 2016; additional briefing and argument on post-trial motions are expected to continue over the coming months.

In February 2010, Fairchild and System General (SG) filed suits for patent infringement against the Company, Power Integrations Netherlands B.V., and representative offices of Power Integrations Netherlands in Shanghai and Shenzhen with the Suzhou Intermediate Court in the People’s Republic of China. The suits asserted four Chinese patents and sought an injunction and damages of approximately $19.0 million. Power Integrations Netherlands filed invalidation proceedings for all four asserted SG patents in the People’s Republic of China Patent Reexamination Board (PRB) of the State Intellectual Property Office (SIPO), and all four challenges were accepted by the PRB, with hearings conducted in September 2010. In early January 2012, the Company received rulings from the PRB invalidating the majority of the claims Fairchild asserted in litigation. The Suzhou Court conducted evidentiary hearings in 2012 and issued rulings in late December 2012, finding that the Company did not infringe any of the asserted patents. Fairchild filed appeals challenging the Suzhou Court’s non-infringement rulings, and the appeals court in Nanjing held further hearings in the infringement proceedings in late 2014, but Fairchild has since dismissed its appeals, bringing the infringement proceedings to a close in the first quarter of 2015.

On July 11, 2011, the Company filed a complaint in the U.S. District Court, District of Columbia, against David Kappos in his capacity as Director of the United States Patent and Trademark Office (PTO) as part of the ongoing reexamination proceedings related to one of the patents asserted against Fairchild and SG in the Delaware litigation described above. The Company filed a motion for summary judgment on a preliminary jurisdictional issue, and the PTO filed a cross-motion to dismiss on this same issue; briefing on those motions was completed in October, 2011. On November 18, 2013, the Court granted the PTO’s motion and transferred the case to the Federal Circuit, where additional briefing took place. Following a hearing in May 2015, the Federal Circuit ruled in the Company’s favor on August 12, 2015, overturning the PTO’s claim construction and remanding the case for further proceedings.

On May 1, 2012, Fairchild Semiconductor Corporation and Fairchild's wholly owned subsidiary, System General Corporation (referred to collectively as “Fairchild”), filed a complaint against the Company in the United States District Court for the District of Delaware. In its complaint, Fairchild alleged that the Company has infringed and is infringing four patents pertaining to power conversion integrated circuit devices. The Company answered Fairchild’s complaint, denying infringement and asking for a declaration from the Court that it does not infringe any Fairchild patent and that the Fairchild patents are invalid, and the Company also asserted counterclaims against Fairchild for infringement of five of the Company’s patents. Fairchild has withdrawn its claim for infringement of one of the patents it asserted against the Company after the Company’s preliminary challenge. The parties streamlined their contentions in view of the Court’s pretrial rulings, and following a trial in late May and early June 2015, a jury returned a verdict finding that Fairchild infringed one of the Company’s patents, that Fairchild has induced and contributed to others’ infringement of the Company’s patent, and that the Company induced infringement of a Fairchild patent that was previously found infringed in the 2012 trial described above, with a damages award of $2.4 million in favor of Fairchild. Both parties filed post-trial motions and challenges to various portions of the jury verdicts, and the Court has addressed the first wave of post-trial motions, denying each side’s challenges to the verdict, with further post-trial briefing on Fairchild’s requests for an injunction and attorneys’ fees expected to continue over the coming months. However, in parallel proceedings the Patent Office has rejected all of the asserted claims of the one Fairchild patent found infringed, determinations that Fairchild is challenging on appeal, and the Court rejected Fairchild’s earlier request for an injunction based on those same claims. The Company believes it has valid defenses against the $2.4 million award in favor of Fairchild, and therefore has not recorded a loss in its financial statements at this time.

On October 21, 2015, the Company filed a complaint for patent infringement against Fairchild Semiconductor Corporation, Fairchild Semiconductor International, Inc., and wholly-owned subsidiary Fairchild (Taiwan) Corporation (referred to collectively as “Fairchild”) to address Fairchild’s continued infringement of two patents Fairchild was previously found to infringe in the three District Court cases the Company brought against Fairchild discussed above. In each of the three prior cases, Fairchild was found to infringe one of the patents at issue in the latest complaint, and Fairchild’s challenges to the validity of the patents were rejected during the course of the prior lawsuits as well. Fairchild has answered the Company’s complaint, denying infringement and asking for a declaration from the Court that it does not infringe any Power Integrations patent and that the patents are invalid. Fairchild’s answer also included counterclaims accusing the Company of infringing four patents pertaining to power conversion integrated circuit devices, including one patent the Company was found not to infringe in prior litigation. The Company has answered Fairchild’s counterclaims, denying infringement and asking for a declaration from the Court that it does not infringe any Fairchild patent and that the Fairchild patents are invalid. No trial date has been scheduled, but further proceedings are expected over the course of the coming months.

On March 10, 2016, Silver Star Capital, LLC filed a petition with the U.S. Patent & Trademark Office (PTO) requesting that the PTO conduct an inter partes review (IPR) of the validity of the Company’s U.S. Patent No. 6,212,079 (the ’079 patent), which the Company has asserted against Fairchild Semiconductor in the California litigation initiated in 2004, as discussed above. The Company’s ’079 patent is also asserted in the Company’s most recent lawsuit against Fairchild filed in October 2015, also discussed above. On March 29, 2016, ON Semiconductor Corporation filed another petition requesting inter partes review of the Company’s ’079 patent. The Company has filed its preliminary response to both Silver Star Capital and On Semiconductor’s IPR petitions directed to the ’079 patent. On May 2, 2016, ON Semiconductor Corporation filed another petition requesting inter partes review of the validity of the Company’s U.S. Patent No. 6,538,908 (the ’908 patent), which the Company has also asserted against Fairchild Semiconductor in the California litigation initiated in 2004, as discussed above. The PTO has not acted on any of these IPR petitions at this time but is expected to do so later this year. Although the validity of the ’079 and ’098 patents has previously been confirmed in two prior PTO reexamination proceedings and in the Company’s District Court litigation with Fairchild, and though the Company intends to vigorously defend the validity of the ’079 and ’098 patents, the outcome of the IPR proceedings is uncertain.

On April 1, 2016, Opticurrent, LLC filed a complaint against the Company in the United States District Court for the Eastern District of Texas. In its complaint, Opticurrent alleges that the Company has infringed and is infringing one patent pertaining to transistor switch devices. The Company has filed a motion to dismiss to Opticurrent’s complaint, but the Court has not ruled on the motion, and further proceedings and discovery are expected over the course of the coming months, with trial currently scheduled for October 2017. The Company intends to vigorously defend itself against Opticurrent’s claims.

The Company is unable to predict the outcome of legal proceedings with certainty, and there can be no assurance that Power Integrations will prevail in the above-mentioned unsettled litigations. These litigations, whether or not determined in Power Integrations’ favor or settled, will be costly and will divert the efforts and attention of the Company’s management and technical personnel from normal business operations, potentially causing a material adverse effect on the business, financial condition and operating results. Currently, the Company is not able to estimate a loss or a range of loss for the ongoing litigation disclosed above, however adverse determinations in litigation could result in monetary losses, the loss of proprietary rights, subject the Company to significant liabilities, require Power Integrations to seek licenses from third parties or prevent the Company from licensing the technology, any of which could have a material adverse effect on the Company’s business, financial condition and operating results.

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INDEMNIFICATIONS

6 Months Ended

Jun. 30, 2016

Commitments and Contingencies Disclosure [Abstract]

INDEMNIFICATIONS

INDEMNIFICATIONS:

The Company sells products to its distributors under contracts, collectively referred to as Distributor Sales Agreements (“DSA”). Each DSA contains the relevant terms of the contractual arrangement with the distributor, and generally includes certain provisions for indemnifying the distributor against losses, expenses, and liabilities from damages that may be awarded against the distributor in the event the Company's products are found to infringe upon a patent, copyright, trademark, or other proprietary right of a third party (“Customer Indemnification”). The DSA generally limits the scope of and remedies for the Customer Indemnification obligations in a variety of industry-standard respects, including, but not limited to, limitations based on time and geography, and a right to replace an infringing product. The Company also, from time to time, has granted a specific indemnification right to individual customers.

The Company believes its internal development processes and other policies and practices limit its exposure related to such indemnifications. In addition, the Company requires its employees to sign a proprietary information and inventions agreement, which assigns the rights to its employees' development work to the Company. To date, the Company has not had to reimburse any of its distributors or customers for any losses related to these indemnifications and no material claims were outstanding as of June 30, 2016. For several reasons, including the lack of prior indemnification claims and the lack of a monetary liability limit for certain infringement cases, the Company cannot determine the maximum amount of potential future payments, if any, related to such indemnifications.

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COMPONENTS OF THE COMPANY'S CONDENSED CONSOLIDATED BALANCE SHEETS (Tables)

6 Months Ended

Jun. 30, 2016

Balance Sheet Related Disclosures [Abstract]

Schedule of Accounts Receivable

Accounts Receivable

(In thousands)	June 30, 2016			December 31, 2015
Accounts receivable trade	$	55,772		$	43,622
Accrued ship and debit and rebate claims	(41,251		)	(35,486		)
Allowance for doubtful accounts	(511		)	(318		)
Total	$	14,010		$	7,818

Schedule of Inventory, Current

Inventories

(In thousands)	June 30, 2016		December 31, 2015
Raw materials	$	12,938	$	19,090
Work-in-process	14,227		12,770
Finished goods	19,584		20,074
Total	$	46,749	$	51,934

Schedule of Prepaid Expenses and Other Current Assets

Prepaid Expenses and Other Current Assets

(In thousands)	June 30, 2016		December 31, 2015
Prepaid legal fees	$	200	$	2,023
Prepaid income tax	855		309
Prepaid maintenance agreements	1,463		736
Interest receivable	401		519
Advance to suppliers	313		324
Other	3,246		2,879
Total	$	6,478	$	6,790

Schedule Of Intangible Assets

Intangible Assets

	June 30, 2016							December 31, 2015
(In thousands)	Gross		Accumulated Amortization			Net		Gross		Accumulated Amortization			Net
Domain name	$	1,261	$	—		$	1,261	$	1,261	$	—		$	1,261
In-process research and development	4,690		—			4,690		4,690		—			4,690
Technology licenses	3,000		(3,000		)	—		3,000		(2,925		)	75
Developed technology	33,270		(13,577		)	19,693		33,270		(11,670		)	21,600
Customer relationships	20,030		(11,308		)	8,722		20,030		(10,031		)	9,999
In-place leases	660		(300		)	360		660		(120		)	540
Total intangible assets	$	62,911	$	(28,185	)	$	34,726	$	62,911	$	(24,746	)	$	38,165

Schedule of Finite-Lived Intangible Assets, Future Amortization Expense

The estimated future amortization expense related to finite-lived intangible assets at June 30, 2016, is as follows:

Fiscal Year	Estimated Amortization (in thousands)
2016 (remaining 6 months)	$	3,223
2017	6,084
2018	5,152
2019	4,753
2020	3,528
Thereafter	6,035
Total (1)	$	28,775

_______________

(1) The total above excludes $4.7 million of in-process research and development that will be amortized, upon completion of development, over the estimated useful life of the technology.

Schedule of Accumulated Other Comprehensive Income (Loss)

Changes in accumulated other comprehensive income (loss) for the three and six months ended June 30, 2016 and 2015, was as follows:

	Unrealized Gains and Losses on Marketable Securities					Defined Benefit Pension Items										Foreign Currency Items						Total
	Three Months Ended					Three Months Ended										Three Months Ended						Three Months Ended
	June 30,					June 30,										June 30,						June 30,
(In thousands)	2016		2015			2016					2015					2016			2015			2016			2015
Beginning balance	$	116	$	139		$	(1,544	)			$	(1,226	)			$	(224	)	$	56		$	(1,652	)	$	(1,031	)
Other comprehensive income (loss) before reclassifications	48		(93		)	—					—					37			(57		)	85			(150		)
Amounts reclassified from accumulated other comprehensive income (loss)	—		—			40			(1	)	14			(1	)	—			—			40			14
Net-current period other comprehensive income (loss)	48		(93		)	40					14					37			(57		)	125			(136		)
Ending balance	$	164	$	46		$	(1,504	)			$	(1,212	)			$	(187	)	$	(1	)	$	(1,527	)	$	(1,167	)

_______________

(1) This component of accumulated other comprehensive income (loss) is included in the computation of net periodic pension cost for the three months ended June 30, 2016 and 2015.

	Unrealized Gains and Losses on Marketable Securities						Defined Benefit Pension Items										Foreign Currency Items						Total
	Six Months Ended						Six Months Ended										Six Months Ended						Six Months Ended
	June 30,						June 30,										June 30,						June 30,
(In thousands)	2016			2015			2016					2015					2016			2015			2016			2015
Beginning balance	$	(97	)	$	83		$	(1,584	)			$	(1,240	)			$	(170	)	$	21		$	(1,851	)	$	(1,136	)
Other comprehensive income (loss) before reclassifications	261			(37		)	—					—					(17		)	(22		)	244			(59		)
Amounts reclassified from accumulated other comprehensive income (loss)	—			—			80			(1	)	28			(1	)	—			—			80			28
Net-current period other comprehensive income (loss)	261			(37		)	80					28					(17		)	(22		)	324			(31		)
Ending balance	$	164		$	46		$	(1,504	)			$	(1,212	)			$	(187	)	$	(1	)	$	(1,527	)	$	(1,167	)

_______________

(1) This component of accumulated other comprehensive income (loss) is included in the computation of net periodic pension cost for the six months ended June 30, 2016 and 2015.

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FAIR VALUE MEASUREMENTS (Tables)

6 Months Ended

Jun. 30, 2016

Fair Value Disclosures [Abstract]

Fair value of marketable securities and investments

    The fair-value hierarchy of the Company's cash equivalents and marketable securities at June 30, 2016, and December 31, 2015, was as follows:

	Fair Value Measurement at
	June 30, 2016
(In thousands)	Total Fair Value		Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)
Commercial paper	$	55,800	$	—	$	55,800
Money market funds	770		770		—
Corporate securities	80,393		—		80,393
Total	$	136,963	$	770	$	136,193

	Fair Value Measurement at
	December 31, 2015
(In thousands)	Total Fair Value		Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)
Commercial paper	$	21,194	$	—	$	21,194
Money market funds	104		104		—
Corporate securities	83,769		—		83,769
Total	$	105,067	$	104	$	104,963

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MARKETABLE SECURITITES (Tables)

6 Months Ended

Jun. 30, 2016

Marketable Securities [Abstract]

Available-for-sale Securities

Amortized cost and estimated fair market value of marketable securities classified as available-for-sale (excluding cash equivalents) at June 30, 2016, were as follows:

	Amortized Cost		Gross Unrealized					Estimated Fair Market Value
(In thousands)			Gains		Losses
Investments due in less than 3 months:
Commercial paper	$	8,189	$	—	$	—		$	8,189
Corporate securities	14,027		—		(3		)	14,024
Total	22,216		—		(3		)	22,213
Investments due in 4-12 months:
Commercial paper	8,309		—		—			8,309
Corporate securities	33,591		50		—			33,641
Total	41,900		50		—			41,950
Investments due between 12 months and 5 years:
Corporate securities	32,611		117		—			32,728
Total	32,611		117		—			32,728
Total marketable securities	$	96,727	$	167	$	(3	)	$	96,891

Amortized cost and estimated fair market value of marketable securities classified as available-for-sale (excluding cash equivalents) at December 31, 2015, were as follows:    

	Amortized Cost		Gross Unrealized					Estimated Fair Market Value
(In thousands)			Gains		Losses
Investments due in less than 3 months:
Corporate securities	$	38,586	$	7	$	(10	)	$	38,583
Total	38,586		7		(10		)	38,583
Investments due in 4-12 months:
Corporate securities	33,654		1		(36		)	33,619
Total	33,654		1		(36		)	33,619
Investments due between 12 months and 5 years:
Corporate securities	11,626		—		(59		)	11,567
Total	11,626		—		(59		)	11,567
Total marketable securities	$	83,866	$	8	$	(105	)	$	83,769

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STOCK-BASED COMPENSATION (Tables)

6 Months Ended

Jun. 30, 2016

Disclosure of Compensation Related Costs, Share-based Payments [Abstract]

Stock-based Compensation Expense

The following table summarizes the stock-based compensation expense recognized in accordance with ASC 718-10 for the three and six months ended June 30, 2016, and June 30, 2015:

	Three Months Ended				Six Months Ended
	June 30,				June 30,
(In thousands)	2016		2015		2016		2015
Cost of revenues	$	293	$	257	$	383	$	506
Research and development	1,940		1,306		3,409		2,697
Sales and marketing	899		878		1,926		1,890
General and administrative	1,880		1,309		3,710		3,048
Total stock-based compensation expense	$	5,012	$	3,750	$	9,428	$	8,141

Summary of Option Activity Under the Plans

A summary of stock options outstanding as of June 30, 2016, and activity during the six months then ended, is presented below:

	Shares (in thousands)		Weighted- Average Exercise Price		Weighted-Average Remaining Contractual Term (in years)	Aggregate Intrinsic Value (in thousands)
Outstanding at January 1, 2016	1,030		$	27.58
Granted	—		$	—
Exercised	(44	)	$	23.31
Forfeited or expired	—		$	—
Outstanding at June 30, 2016	986		$	27.77	2.76	$	21,911
Exercisable at June 30, 2016	986		$	27.77	2.76	$	21,911
Vested and expected to vest at June 30, 2016	986		$	27.77	2.76	$	21,911

Performance Based Awards (PSUs)

Share-based Compensation Arrangement by Share-based Payment Award [Line Items]

Schedule of Share-based Compensation, Restricted Stock Units Award Activity

A summary of PSUs outstanding as of June 30, 2016, and activity during the six months then ended, is presented below:

	Shares (in thousands)		Weighted-Average Grant Date Fair Value Per Share		Weighted-Average Remaining Contractual Term (in years)	Aggregate Intrinsic Value (in thousands)
Outstanding at January 1, 2016	11		$	52.35
Granted	100		$	46.12
Vested	(11	)	$	52.35
Forfeited	—		$	—
Outstanding at June 30, 2016	100		$	46.12	0.50	$	4,983
Outstanding and expected to vest at June 30, 2016	97				0.50	$	4,834

Long-Term Performance-Based Awards (PRSUs)

Share-based Compensation Arrangement by Share-based Payment Award [Line Items]

Schedule of Share-based Compensation, Restricted Stock Units Award Activity

A summary of PRSUs outstanding as of June 30, 2016, and activity during the six months then ended, is presented below:

	Shares (in thousands)	Weighted-Average Grant Date Fair Value Per Share		Weighted-Average Remaining Contractual Term (in years)	Aggregate Intrinsic Value (in thousands)
Outstanding at January 1, 2016	129	$	53.75
Granted	78	$	43.26
Vested	—	$	—
Forfeited	—	$	—
Outstanding at June 30, 2016	207	$	49.78	1.60	$	10,351
Outstanding and expected to vest at June 30, 2016	96			1.57	$	4,777

Restricted Stock Units (RSUs)

Share-based Compensation Arrangement by Share-based Payment Award [Line Items]

Schedule of Share-based Compensation, Restricted Stock Units Award Activity

A summary of RSUs outstanding as of June 30, 2016, and activity during the six months then ended, is presented below:

	Shares (in thousands)		Weighted- Average Grant Date Fair Value Per Share		Weighted-Average Remaining Contractual Term (in years)	Aggregate Intrinsic Value (in thousands)
Outstanding at January 1, 2016	681		$	46.98
Granted	297		$	45.82
Vested	(251	)	$	45.14
Forfeited	(11	)	$	46.75
Outstanding at June 30, 2016	716		$	47.15	1.70	$	35,789
Outstanding and expected to vest at June 30, 2016	657				1.65	$	32,829

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SIGNIFICANT CUSTOMERS AND INTERNATIONAL SALES (Tables)

6 Months Ended

Jun. 30, 2016

Concentration Risk [Line Items]

International sales

As a percentage of total net revenues, international sales, which consist of sales to distributors and direct customers outside of the United States of America, comprise the following:

	Three Months  Ended				Six Months Ended
	June 30,				June 30,
	2016		2015		2016		2015
Hong Kong/China	51	%	51	%	50	%	49	%
Taiwan	14	%	14	%	13	%	13	%
Korea	10	%	8	%	11	%	10	%
Western Europe (excluding Germany)	11	%	11	%	11	%	11	%
Japan	5	%	6	%	5	%	6	%
Germany	2	%	2	%	2	%	2	%
Other	3	%	3	%	4	%	4	%
Total foreign revenue	96	%	95	%	96	%	95	%

Sales Revenue, Goods, Net

Concentration Risk [Line Items]

Schedules of Concentration of Risk, by Risk Factor

The following table discloses these customers’ percentage of revenues for the respective periods:

	Three Months Ended				Six Months Ended
	June 30,				June 30,
Customer	2016		2015		2016		2015
Avnet	19	%	22	%	20	%	22	%
Powertech Distribution Ltd.	13	%	*		13	%	*

_______________                        

* Total customer percentage of revenues was less than 10%.

Accounts Receivable [Member]

Concentration Risk [Line Items]

Schedules of Concentration of Risk, by Risk Factor

The following customers represented 10% or more of accounts receivable:

Customer	June 30, 2016		December 31, 2015
Avnet	25	%	20	%
ATM Electronic Corporation	13	%	10	%

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COMMON STOCK REPURCHASES AND CASH DIVIDENDS (Tables)

6 Months Ended

Jun. 30, 2016

Common Stock Repurchases and Cash Dividends [Abstract]

Dividends Declared and Paid [Table Text Block]

	Three Months Ended				Six Months Ended
(In thousands, except per share amounts)	June 30, 2016		June 30, 2015		June 30, 2016		June 30, 2015
Dividends declared and paid	$	3,754	$	3,529	$	7,483	$	7,048
Dividends declared per common share	$	0.13	$	0.12	$	0.26	$	0.24

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EARNINGS PER SHARE (Tables)

6 Months Ended

Jun. 30, 2016

Earnings Per Share [Abstract]

Earnings per share calculation

A summary of the earnings per share calculation is as follows:    

	Three Months Ended				Six Months Ended
	June 30,				June 30,
(In thousands, except per share amounts)	2016		2015		2016		2015
Basic earnings per share:
Net income	$	11,265	$	8,590	$	20,108	$	14,933
Weighted-average common shares	28,850		29,368		28,765		29,339
Basic earnings per share	$	0.39	$	0.29	$	0.70	$	0.51
Diluted earnings per share: (1)
Net income	$	11,265	$	8,590	$	20,108	$	14,933
Weighted-average common shares	28,850		29,368		28,765		29,339
Effect of dilutive awards:
Employee stock plans	572		666		596		736
Diluted weighted-average common shares	29,422		30,034		29,361		30,075
Diluted earnings per share	$	0.38	$	0.29	$	0.68	$	0.50

_______________

(1) The Company includes the shares underlying performance-based awards in the calculation of diluted earnings per share if the performance conditions have been satisfied as of the end of the reporting period and excludes such shares when the necessary conditions have not been met. The Company has excluded the shares underlying the outstanding performance-based awards in the 2016 and 2015 calculations as the shares were not contingently issuable as of the end of the reporting periods. 

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COMPONENTS OF THE COMPANY'S CONDENSED CONSOLIDATED BALANCE SHEETS Accounts Receivable (Details) - USD ($) $ in Thousands	Jun. 30, 2016	Dec. 31, 2015
Balance Sheet Related Disclosures [Abstract]
Accounts receivable trade	$ 55,772	$ 43,622
Accrued ship and debit and rebate claims	(41,251)	(35,486)
Allowance for doubtful accounts	(511)	(318)
Total	$ 14,010	$ 7,818

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COMPONENTS OF THE COMPANY'S CONDENSED CONSOLIDATED BALANCE SHEETS Inventory (Details) - USD ($) $ in Thousands	Jun. 30, 2016	Dec. 31, 2015
Balance Sheet Related Disclosures [Abstract]
Raw materials	$ 12,938	$ 19,090
Work-in-process	14,227	12,770
Finished goods	19,584	20,074
Total	$ 46,749	$ 51,934

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COMPONENTS OF THE COMPANY'S CONDENSED CONSOLIDATED BALANCE SHEETS Prepaid Expenses and Other Current Assets (Details) - USD ($) $ in Thousands	Jun. 30, 2016	Dec. 31, 2015
Balance Sheet Related Disclosures [Abstract]
Prepaid legal fees	$ 200	$ 2,023
Prepaid income tax	855	309
Prepaid maintenance agreements	1,463	736
Interest receivable	401	519
Advance to suppliers	313	324
Other	3,246	2,879
Total	$ 6,478	$ 6,790

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COMPONENTS OF THE COMPANY'S CONDENSED CONSOLIDATED BALANCE SHEETS Intangible Assets (Details) - USD ($) $ in Thousands		Jun. 30, 2016	Dec. 31, 2015
Schedule of Intangible Assets [Table] [Line Items]
Intangible Assets, Gross		$ 62,911	$ 62,911
Finite-Lived Intangible Assets, Accumulated Amortization		(28,185)	(24,746)
Total intangible assets		34,726	38,165
Finite-Lived Intangible Assets, Net	[1]	28,775
Technology licenses
Schedule of Intangible Assets [Table] [Line Items]
Finite-Lived Intangible Assets, Gross		3,000	3,000
Finite-Lived Intangible Assets, Accumulated Amortization		(3,000)	(2,925)
Finite-Lived Intangible Assets, Net		0	75
Developed technology
Schedule of Intangible Assets [Table] [Line Items]
Finite-Lived Intangible Assets, Gross		33,270	33,270
Finite-Lived Intangible Assets, Accumulated Amortization		(13,577)	(11,670)
Finite-Lived Intangible Assets, Net		19,693	21,600
Customer relationships
Schedule of Intangible Assets [Table] [Line Items]
Finite-Lived Intangible Assets, Gross		20,030	20,030
Finite-Lived Intangible Assets, Accumulated Amortization		(11,308)	(10,031)
Finite-Lived Intangible Assets, Net		8,722	9,999
In-place leases
Schedule of Intangible Assets [Table] [Line Items]
Finite-Lived Intangible Assets, Gross		660	660
Finite-Lived Intangible Assets, Accumulated Amortization		(300)	(120)
Finite-Lived Intangible Assets, Net		360	540
Domain name
Schedule of Intangible Assets [Table] [Line Items]
Indefinite-Lived Intangible Assets		1,261	1,261
In-process research and development
Schedule of Intangible Assets [Table] [Line Items]
Indefinite-Lived Intangible Assets		$ 4,690	$ 4,690

[1] The total above excludes $4.7 million of in-process research and development that will be amortized, upon completion of development, over the estimated useful life of the technology.

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COMPONENTS OF THE COMPANY'S CONDENSED CONSOLIDATED BALANCE SHEETS Future Amortization Expense (Details) $ in Thousands	Jun. 30, 2016 USD ($)
Finite-Lived Intangible Assets, Net, Amortization Expense, Fiscal Year Maturity [Abstract]
2016 (remaining 6 months)	$ 3,223
2017	6,084
2018	5,152
2019	4,753
2020	3,528
Thereafter	6,035
Total (1)	$ 28,775	[1]

[1] The total above excludes $4.7 million of in-process research and development that will be amortized, upon completion of development, over the estimated useful life of the technology.

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COMPONENTS OF THE COMPANY'S CONDENSED CONSOLIDATED BALANCE SHEETS Changes in Accumulated Other Comprehensive Income (Loss) (Details) - USD ($) $ in Thousands	3 Months Ended				6 Months Ended
	Jun. 30, 2016		Jun. 30, 2015		Jun. 30, 2016		Jun. 30, 2015
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning balance	$ (1,652)		$ (1,031)		$ (1,851)		$ (1,136)
Other comprehensive income (loss) before reclassifications	85		(150)		244		(59)
Amounts reclassified from accumulated other comprehensive income (loss)	40		14		80		28
Net-current period other comprehensive income (loss)	125		(136)		324		(31)
Ending balance	(1,527)		(1,167)		(1,527)		(1,167)
Unrealized Gains and Losses on Marketable Securities
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning balance	116		139		(97)		83
Other comprehensive income (loss) before reclassifications	48		(93)		261		(37)
Amounts reclassified from accumulated other comprehensive income (loss)	0		0		0		0
Net-current period other comprehensive income (loss)	48		(93)		261		(37)
Ending balance	164		46		164		46
Defined Benefit Pension Items
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning balance	(1,544)		(1,226)		(1,584)		(1,240)
Other comprehensive income (loss) before reclassifications	0		0		0		0
Amounts reclassified from accumulated other comprehensive income (loss)	40	[1]	14	[1]	80	[2]	28	[2]
Net-current period other comprehensive income (loss)	40		14		80		28
Ending balance	(1,504)		(1,212)		(1,504)		(1,212)
Foreign Currency Items
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning balance	(224)		56		(170)		21
Other comprehensive income (loss) before reclassifications	37		(57)		(17)		(22)
Amounts reclassified from accumulated other comprehensive income (loss)	0		0		0		0
Net-current period other comprehensive income (loss)	37		(57)		(17)		(22)
Ending balance	$ (187)		$ (1)		$ (187)		$ (1)

[1] This component of accumulated other comprehensive income (loss) is included in the computation of net periodic pension cost for the three months ended June 30, 2016 and 2015.

[2] This component of accumulated other comprehensive income (loss) is included in the computation of net periodic pension cost for the six months ended June 30, 2016 and 2015.

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FAIR VALUE MEASUREMENTS Fair Value Measurement (Details) - USD ($) $ in Thousands	Jun. 30, 2016	Dec. 31, 2015
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total Investments at Fair Value	$ 136,963	$ 105,067
Commercial paper
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments at Fair Value	55,800	21,194
Money market funds
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments at Fair Value	770	104
Corporate securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments at Fair Value	80,393	83,769
Quoted Prices in Active Markets for Identical Assets (Level 1)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total Investments at Fair Value	770	104
Quoted Prices in Active Markets for Identical Assets (Level 1) | Commercial paper
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments at Fair Value	0	0
Quoted Prices in Active Markets for Identical Assets (Level 1) | Money market funds
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments at Fair Value	770	104
Quoted Prices in Active Markets for Identical Assets (Level 1) | Corporate securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments at Fair Value	0	0
Significant Other Observable Inputs (Level 2)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total Investments at Fair Value	136,193	104,963
Significant Other Observable Inputs (Level 2) | Commercial paper
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments at Fair Value	55,800	21,194
Significant Other Observable Inputs (Level 2) | Money market funds
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments at Fair Value	0	0
Significant Other Observable Inputs (Level 2) | Corporate securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments at Fair Value	$ 80,393	$ 83,769

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MARKETABLE SECURITITES Marketable Securities (Details) - USD ($) $ in Thousands	Jun. 30, 2016	Dec. 31, 2015
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	$ 96,727	$ 83,866
Gross Unrealized Gains	167	8
Gross Unrealized Losses	(3)	(105)
Estimated Fair Market Value	96,891	83,769
Investments due in less than 3 months:
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	22,216	38,586
Gross Unrealized Gains	0	7
Gross Unrealized Losses	(3)	(10)
Estimated Fair Market Value	22,213	38,583
Investments due in 4-12 months:
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	41,900	33,654
Gross Unrealized Gains	50	1
Gross Unrealized Losses	0	(36)
Estimated Fair Market Value	41,950	33,619
Investments due between 12 months and 5 years:
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	32,611	11,626
Gross Unrealized Gains	117	0
Gross Unrealized Losses	0	(59)
Estimated Fair Market Value	32,728	11,567
Corporate securities | Investments due in less than 3 months:
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	14,027	38,586
Gross Unrealized Gains	0	7
Gross Unrealized Losses	(3)	(10)
Estimated Fair Market Value	14,024	38,583
Corporate securities | Investments due in 4-12 months:
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	33,591	33,654
Gross Unrealized Gains	50	1
Gross Unrealized Losses	0	(36)
Estimated Fair Market Value	33,641	33,619
Corporate securities | Investments due between 12 months and 5 years:
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	32,611	11,626
Gross Unrealized Gains	117	0
Gross Unrealized Losses	0	(59)
Estimated Fair Market Value	32,728	$ 11,567
Commercial paper | Investments due in less than 3 months:
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	8,189
Gross Unrealized Gains	0
Available-for-sale Debt Securities, Accumulated Gross Unrealized Loss, before Tax	0
Estimated Fair Market Value	8,189
Commercial paper | Investments due in 4-12 months:
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	8,309
Gross Unrealized Gains	0
Available-for-sale Debt Securities, Accumulated Gross Unrealized Loss, before Tax	0
Estimated Fair Market Value	$ 8,309

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STOCK-BASED COMPENSATION Stock-Based Compensation (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Stock-based compensation expense for stock options, stock awards and employee stock purchases included in operations:
Stock-Based Compensation Expense	$ 5,012	$ 3,750	$ 9,428	$ 8,141
Stock Options
Stock-based compensation expense for stock options, stock awards and employee stock purchases included in operations:
Stock-Based Compensation Expense	100	200	200	400
Performance Based Awards and Long Term Performance based Units
Stock-based compensation expense for stock options, stock awards and employee stock purchases included in operations:
Stock-Based Compensation Expense	1,600	200	2,300	800
Restricted Stock Units (RSUs)
Stock-based compensation expense for stock options, stock awards and employee stock purchases included in operations:
Stock-Based Compensation Expense	3,000	3,100	6,300	6,300
Employee Stock Purchase Plan
Stock-based compensation expense for stock options, stock awards and employee stock purchases included in operations:
Stock-Based Compensation Expense	300	300	600	600
Cost of revenues
Stock-based compensation expense for stock options, stock awards and employee stock purchases included in operations:
Stock-Based Compensation Expense	293	257	383	506
Research and development
Stock-based compensation expense for stock options, stock awards and employee stock purchases included in operations:
Stock-Based Compensation Expense	1,940	1,306	3,409	2,697
Sales and marketing
Stock-based compensation expense for stock options, stock awards and employee stock purchases included in operations:
Stock-Based Compensation Expense	899	878	1,926	1,890
General and administrative
Stock-based compensation expense for stock options, stock awards and employee stock purchases included in operations:
Stock-Based Compensation Expense	$ 1,880	$ 1,309	$ 3,710	$ 3,048

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STOCK-BASED COMPENSATION Option Activity (Details) - Stock Options $ / shares in Units, shares in Thousands, $ in Thousands	6 Months Ended
	Jun. 30, 2016 USD ($) $ / shares shares
Option activity under the Plans
Outstanding at January 1, 2016 | shares	1,030
Granted | shares	0
Exercised | shares	(44)
Forfeited or expired | shares	0
Outstanding at June 30, 2016 | shares	986
Exercisable at June 30, 2016 | shares	986
Vested and expected to vest at June 30, 2016 | shares	986
Weighted- Average Exercise Price (in dollars per share)
Outstanding at January 1, 2016 | $ / shares	$ 27.58
Granted | $ / shares	0.00
Exercised | $ / shares	23.31
Forfeited or expired | $ / shares	0.00
Outstanding at June 30, 2016 | $ / shares	27.77
Exercisable at June 30, 2016 | $ / shares	27.77
Vested and expected to vest at June 30, 2016 | $ / shares	$ 27.77
Weighted-Average Remaining Contractual Term (in years)
Outstanding, weighted-average remaining contractual term at period end	2 years 9 months 5 days
Exercisable, weighted-average remaining contractual term, at period-end	2 years 9 months 5 days
Vested and expected to vest, weighted-average remaining contractual term, at period end	2 years 9 months 5 days
Aggregate Intrinsic Value [Abstract]
Outstanding, aggregate intrinsic value at period end | $	$ 21,911
Exercisable, aggregate intrinsic value, at period end | $	21,911
Vested and expected to vest, aggregate intrinsic value, at Period-end | $	$ 21,911

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STOCK-BASED COMPENSATION Performance-based Awards and Restricted Stock Units (Details) $ / shares in Units, shares in Thousands, $ in Thousands	6 Months Ended
	Jun. 30, 2016 USD ($) $ / shares shares
Performance Based Awards (PSUs)
Shares
Outstanding at January 1, 2016	11
Granted	100
Vested	(11)
Forfeited	0
Outstanding at June 30, 2016	100
Outstanding and expected to vest at June 30, 2016	97
Share Based Compensation Arrangement By Share Based Payment Award, Equity Instruments Other Than Options, Outstanding And Expected To Vest, Weighted Average Remaining Contractual Term in Years	6 months
Weighted- Average Grant Date Fair Value Per Share (in dollars per share)
Outstanding at January 1, 2016 | $ / shares	$ 52.35
Granted | $ / shares	46.12
Vested | $ / shares	52.35
Forfeited | $ / shares	0.00
Outstanding at June 30, 2016 | $ / shares	$ 46.12
Weighted-Average Remaining Contractual Term (in years)
Outstanding at June 30, 2016	6 months
Aggregate Intrinsic Value (in thousands)
Outstanding at June 30, 2016 | $	$ 4,983
Outstanding and expected to vest at June 30, 2016 | $	$ 4,834
Long-Term Performance-Based Awards (PRSUs)
Shares
Outstanding at January 1, 2016	129
Granted	78
Vested	0
Forfeited	0
Outstanding at June 30, 2016	207
Outstanding and expected to vest at June 30, 2016	96
Share Based Compensation Arrangement By Share Based Payment Award, Equity Instruments Other Than Options, Outstanding And Expected To Vest, Weighted Average Remaining Contractual Term in Years	1 year 6 months 25 days
Weighted- Average Grant Date Fair Value Per Share (in dollars per share)
Outstanding at January 1, 2016 | $ / shares	$ 53.75
Granted | $ / shares	43.26
Vested | $ / shares	0.00
Forfeited | $ / shares	0.00
Outstanding at June 30, 2016 | $ / shares	$ 49.78
Weighted-Average Remaining Contractual Term (in years)
Outstanding at June 30, 2016	1 year 7 months 5 days
Aggregate Intrinsic Value (in thousands)
Outstanding at June 30, 2016 | $	$ 10,351
Outstanding and expected to vest at June 30, 2016 | $	$ 4,777
Restricted Stock Units (RSUs)
Shares
Outstanding at January 1, 2016	681
Granted	297
Vested	(251)
Forfeited	(11)
Outstanding at June 30, 2016	716
Outstanding and expected to vest at June 30, 2016	657
Share Based Compensation Arrangement By Share Based Payment Award, Equity Instruments Other Than Options, Outstanding And Expected To Vest, Weighted Average Remaining Contractual Term in Years	1 year 7 months 25 days
Weighted- Average Grant Date Fair Value Per Share (in dollars per share)
Outstanding at January 1, 2016 | $ / shares	$ 46.98
Granted | $ / shares	45.82
Vested | $ / shares	45.14
Forfeited | $ / shares	46.75
Outstanding at June 30, 2016 | $ / shares	$ 47.15
Weighted-Average Remaining Contractual Term (in years)
Outstanding at June 30, 2016	1 year 8 months 12 days
Aggregate Intrinsic Value (in thousands)
Outstanding at June 30, 2016 | $	$ 35,789
Outstanding and expected to vest at June 30, 2016 | $	$ 32,829
Minimum [Member] | Performance Based Awards (PSUs)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of Performance Based Awards Shares Released As Percentage Of Target Number	0.00%
Minimum [Member] | Long-Term Performance-Based Awards (PRSUs)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of Performance Based Awards Shares Released As Percentage Of Target Number	0.00%
Maximum [Member] | Performance Based Awards (PSUs)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of Performance Based Awards Shares Released As Percentage Of Target Number	200.00%
Maximum [Member] | Long-Term Performance-Based Awards (PRSUs)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of Performance Based Awards Shares Released As Percentage Of Target Number	200.00%

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SIGNIFICANT CUSTOMERS AND INTERNATIONAL SALES Customer and Credit Risk Concentration (Details) - Customer	3 Months Ended		6 Months Ended		12 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015	Dec. 31, 2015
Sales Revenue, Goods, Net | Customer Concentration Risk [Member]
Concentration Risk [Line Items]
Number of major customers	2	1	2	1
Concentration risk percentage benchmark	10.00%	10.00%	10.00%	10.00%
Sales Revenue, Goods, Net | Customer Concentration Risk [Member] | Avnet
Concentration Risk [Line Items]
Concentration risk, percentage of total net revenues	19.00%	22.00%	20.00%	22.00%
Sales Revenue, Goods, Net | Customer Concentration Risk [Member] | Powertech Distribution Ltd.
Concentration Risk [Line Items]
Concentration risk, percentage of total net revenues	13.00%		13.00%
Sales Revenue, Goods, Net | Customer Concentration Risk [Member] | Ten Customers
Concentration Risk [Line Items]
Number of major customers	10	10	10	10
Concentration risk, percentage of total net revenues	63.00%	62.00%	62.00%	60.00%
Accounts Receivable [Member] | Credit Concentration Risk [Member]
Concentration Risk [Line Items]
Number of major customers			10		10
Concentration risk percentage benchmark for accounts receivable (more than)	10.00%		10.00%		10.00%
Accounts Receivable [Member] | Credit Concentration Risk [Member] | Avnet
Concentration Risk [Line Items]
Concentration risk percentage benchmark			25.00%		20.00%
Accounts Receivable [Member] | Credit Concentration Risk [Member] | Ten Customers
Concentration Risk [Line Items]
Concentration risk percentage benchmark			70.00%		66.00%
Accounts Receivable [Member] | Credit Concentration Risk [Member] | ATM Electronic Corporation [Member]
Concentration Risk [Line Items]
Concentration risk percentage benchmark			13.00%		10.00%

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SIGNIFICANT CUSTOMERS AND INTERNATIONAL SALES International Sales (Details) - Sales Revenue, Goods, Net [Member] - Geographic Concentration Risk [Member]	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Revenue from External Customers
Concentration risk, percentage of total net revenues	96.00%	95.00%	96.00%	95.00%
Hong Kong/China
Revenue from External Customers
Concentration risk, percentage of total net revenues	51.00%	51.00%	50.00%	49.00%
Taiwan
Revenue from External Customers
Concentration risk, percentage of total net revenues	14.00%	14.00%	13.00%	13.00%
Korea
Revenue from External Customers
Concentration risk, percentage of total net revenues	10.00%	8.00%	11.00%	10.00%
Western Europe (excluding Germany)
Revenue from External Customers
Concentration risk, percentage of total net revenues	11.00%	11.00%	11.00%	11.00%
Japan
Revenue from External Customers
Concentration risk, percentage of total net revenues	5.00%	6.00%	5.00%	6.00%
Germany
Revenue from External Customers
Concentration risk, percentage of total net revenues	2.00%	2.00%	2.00%	2.00%
Other
Revenue from External Customers
Concentration risk, percentage of total net revenues	3.00%	3.00%	4.00%	4.00%

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COMMON STOCK REPURCHASES AND CASH DIVIDENDS Common Stock Repurchases (Details) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015
Common Stock Repurchases and Cash Dividends [Abstract]
Stock Repurchased During Period, Shares	146,000
Payments for Repurchase of Common Stock	$ 6,435	$ 23,176
Stock Repurchase Program, Remaining Authorized Repurchase Amount	$ 23,600

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COMMON STOCK REPURCHASES AND CASH DIVIDENDS Cash Dividends (Details) $ / shares in Units, $ in Thousands	1 Months Ended	3 Months Ended		6 Months Ended
	Jan. 31, 2016 Quarter $ / shares	Jun. 30, 2016 USD ($) $ / shares	Jun. 30, 2015 USD ($) $ / shares	Jun. 30, 2016 USD ($) $ / shares	Jun. 30, 2015 USD ($) $ / shares
Dividends Declared and Paid [Line Items]
Common Stock, Dividends, Number of Quarterly Distributions Declared, Current Fiscal Year | Quarter	4
Common Stock, Dividends, Per Share, Declared, Current Fiscal Year, First Quarter	$ 0.13
Common Stock, Dividends Per Share Declared, Current Fiscal Year, Second Quarter	0.13
Common Stock, Dividends Per Share Declared, Current Fiscal Year, Third Quarter	0.13
Common Stock, Dividends Per Share Declared, Current Fiscal Year, Fourth Quarter	$ 0.13
Payments of Dividends | $		$ 3,754	$ 3,529	$ 7,483	$ 7,048
Common Stock, Dividends, Per Share, Cash Paid		$ 0.13	$ 0.12	$ 0.26	$ 0.24

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EARNINGS PER SHARE (Details) - USD ($) $ / shares in Units, $ in Thousands		3 Months Ended		6 Months Ended
		Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Basic earnings per share:
NET INCOME		$ 11,265	$ 8,590	$ 20,108	$ 14,933
Weighted-average common shares		28,850,000	29,368,000	28,765,000	29,339,000
Basic earnings per share		$ 0.39	$ 0.29	$ 0.70	$ 0.51
Diluted earnings per share:
NET INCOME		$ 11,265	$ 8,590	$ 20,108	$ 14,933
Weighted-average common shares		28,850,000	29,368,000	28,765,000	29,339,000
Effect of dilutive awards:
Employee stock plans		572,000	666,000	596,000	736,000
Diluted weighted-average common shares		29,422,000	30,034,000	29,361,000	30,075,000
Diluted earnings per share	[1]	$ 0.38	$ 0.29	$ 0.68	$ 0.50
Stock awards excluded in the computation of diluted earnings per share		0	0	0	0

[1] The Company includes the shares underlying performance-based awards in the calculation of diluted earnings per share if the performance conditions have been satisfied as of the end of the reporting period and excludes such shares when the necessary conditions have not been met. The Company has excluded the shares underlying the outstanding performance-based awards in the 2016 and 2015 calculations as the shares were not contingently issuable as of the end of the reporting periods.

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PROVISION FOR INCOME TAXES (Details)	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Income Tax Disclosure [Abstract]
Effective income tax rate	5.00%	6.80%	4.40%	6.40%
Federal statutory tax rate	35.00%	35.00%	35.00%	35.00%

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LEGAL PROCEEDINGS AND CONTINGENCIES (Details) $ in Millions																1 Months Ended						3 Months Ended
	Apr. 01, 2016 patent	Oct. 21, 2015 patent	May 01, 2012 USD ($) patent	Feb. 03, 2011 USD ($)	May 10, 2010 patent	May 05, 2010 patent	Feb. 10, 2010 patent	Dec. 18, 2009 patent	Nov. 04, 2009 patent	Dec. 22, 2008	Dec. 12, 2008 USD ($)	Nov. 07, 2008 patent	May 23, 2008 patent	Oct. 10, 2006 USD ($)	Oct. 20, 2004 patent	Dec. 31, 2015 USD ($)	Jun. 30, 2015 patent	Feb. 28, 2014 USD ($)	Dec. 31, 2012 patents	Apr. 30, 2012 patent	Feb. 28, 2010 USD ($)	Jun. 30, 2016
Patent Infringement Claim Three Counterclaim [Member]
Gain and Loss Contingencies [Line Items]
Number of patents withdrawn from infringement claims					1
Pending Litigation [Member] | Patent Infringement Claim One
Gain and Loss Contingencies [Line Items]
Period for petition for further stay of permanent injunction										90 days
Pending Litigation [Member] | Patent Infringement Claim Two
Gain and Loss Contingencies [Line Items]
Number of patents in filed infringement claims													3
Pending Litigation [Member] | Patent Infringement Claim Two Counterclaim [Member]
Gain and Loss Contingencies [Line Items]
Number of patents in filed infringement claims												3
Number of patents withdrawn from infringement claims								1
Number of patents remaining in infringement claims								2												2
Potential impact on revenue by patent litigation, less than (as a percentage)																						0.50%
Pending Litigation [Member] | Patent Infringement Claim Three Counterclaim [Member]
Gain and Loss Contingencies [Line Items]
Number of patents in filed infringement claims					2
Number of Patents Added to Infringement Claims						1
Pending Litigation [Member] | Patent Infringement Claim Four
Gain and Loss Contingencies [Line Items]
Number of patents in filed infringement claims							4
Damages sought after the Company | $																					$ 19.0
Pending Litigation [Member] | Patent Infringement Claim Five
Gain and Loss Contingencies [Line Items]
Number of patents in filed infringement claims			4
Number of patents withdrawn from infringement claims			1
Pending Litigation [Member] | Patent Infringement Claim Six
Gain and Loss Contingencies [Line Items]
Number of patents in filed infringement claims		2
Pending Litigation [Member] | Patent Infringement Claim Seven
Gain and Loss Contingencies [Line Items]
Number of patents in filed infringement claims	1
Counterclaims [Member] | Patent Infringement Claim Five
Gain and Loss Contingencies [Line Items]
Number of patents in filed infringement claims			5
Loss Contingency, Damages Awarded, Value | $			$ 2.4
Judicial Ruling [Member] | Patent Infringement Claim Two
Gain and Loss Contingencies [Line Items]
Number of Patent Infringements																				2
Judicial Ruling [Member] | Patent Infringement Claim Two Counterclaim [Member]
Gain and Loss Contingencies [Line Items]
Number of Patents Not Infringed																				1
Judicial Ruling [Member] | Patent Infringement Claim Four
Gain and Loss Contingencies [Line Items]
Number of Patents Not Infringed | patents																			4
Judicial Ruling [Member] | Patent Infringement Claim Five
Gain and Loss Contingencies [Line Items]
Number of Patent Infringements																	1
Positive Outcome of Litigation [Member] | Patent Infringement Claim One
Gain and Loss Contingencies [Line Items]
Number of patents in filed infringement claims															4
Damages awarded to the Company | $				$ 12.9							$ 6.1			$ 34.0
Positive Outcome of Litigation [Member] | Patent Infringement Claim Three [Member]
Gain and Loss Contingencies [Line Items]
Number of patents in filed infringement claims									2
Number of patents in infringement case deemed unenforceable by Fairchild									1
Damages awarded to the Company | $																$ 139.8		$ 105.0