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Filing Details

Issuer

Cik	Name	Symbol	Sector (SIC)	IRS No
833640	Power Integrations Inc	POWI	Semiconductors & Related Devices (3674)	943065014

Insiders

Cik	Name	Reported Address	Insider Title	Director	Officer	Large Shareholder	Other
1182405	Balu Balakrishnan	5245 Hellyer Ave San Jose CA 95138	President And Ceo	No	Yes	No	No

Transaction Summary

Sold:	16,839 shares	Avg. Price: $46.09	Total Value: $776,138.45
Number of Shares After Transactions:	210,489 shares

Reported Non-Derivative Transactions

Sec. Name	Acquisiton - Disposition	Date	Amount	Price	Remaning Holdings	Equity Swap Involved	Form Type	Code	Nature of Ownership	Explanation
Common Stock	Disposition	2010-04-15	7,619	$46.08	0	No	4	S	Indirect	By Trust Yngst Son
Common Stock	Disposition	2010-04-15	7,620	$46.08	0	No	4	S	Indirect	Trust for Eldst Son
Common Stock	Disposition	2010-04-15	1,600	$46.25	210,489	No	4	S	Indirect	by Trust

Equity Swap Involved	Form Type	Code	Nature of Ownership	Explanation
No	4	S	Indirect	By Trust Yngst Son
No	4	S	Indirect	Trust for Eldst Son
No	4	S	Indirect	by Trust

Reported Non-Derivative Holdings

Sec. Name	Remaning Holdings	Nature of Ownership	Explanation
Common Stock	12,959	Direct

Footnotes

This sale is pursuant to a 10B5-1 Sales Plan
The range of prices for the enclosed transactions were $45.90 to $46.23.Upon request by the SEC staff, the issuer, or any security holder of the issuer we will provide full information regarding the number of shares sold at each separate price.
The Reporting Person disclaims beneficial ownership of the shares held by the trust except to the extent of his pecuniary interest therein, and this report should not be deemed an admission that the Reporting Person is the beneficial owner of the trust's shares for purposes of Section 16 or for any other purpose.