POWER INTEGRATIONS INC — Director's Dealing 2012

Feb 8, 2012

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: POWER INTEGRATIONS INC (POWI)
CIK: 0000833640
Period of Report: 2012-02-07

Reporting Person: WALKER CLIFFORD (VP Corporate Development)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2012-02-07	Common Stock	M	26041	$14.82	Acquired	50995	Direct
2012-02-07	Common Stock	S	26041	$38.1824	Disposed	24954	Direct
2012-02-07	Common Stock	M	2699	$17.75	Acquired	27653	Direct
2012-02-07	Common Stock	S	2699	$38.1824	Disposed	24954	Direct
2012-02-07	Common Stock	M	18863	$17.75	Acquired	43817	Direct
2012-02-07	Common Stock	S	18863	$37.8969	Disposed	24954	Direct

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2012-02-07	Non-Qualified Stock Option (right to buy)	$14.82	M	26041	Disposed	2012-02-21	Common Stock (26041)	Direct
2012-02-07	Non-Qualified Stock Option (right to buy)	$17.75	M	2699	Disposed	2013-01-08	Common Stock (2699)	Direct
2012-02-07	Non-Qualified Stock Option (right to buy)	$17.75	M	18863	Disposed	2013-01-08	Common Stock (18863)	Direct

Footnotes

F1: The range of prices for the enclosed transactions were $37.8533 to $38.1824.

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.