POWER INTEGRATIONS INC — Director's Dealing 2011

Feb 7, 2011

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: POWER INTEGRATIONS INC (POWI)
CIK: 0000833640
Period of Report: 2011-02-04

Reporting Person: Bell Derek (Vice President, Engineering)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2011-02-04	Common Stock	M	2000	$18.95	Acquired	19798	Direct
2011-02-04	Common Stock	S	2000	$40.34	Disposed	17798	Direct
2011-02-04	Common Stock	M	4000	$18.95	Acquired	21798	Direct
2011-02-04	Common Stock	S	4000	$42.90	Disposed	17798	Direct

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2011-02-04	Non-Qualified Stock Option (Right to Buy)	$18.95	M	2000	Disposed	2013-01-08	Common Stock (2000)	Direct
2011-02-04	Non-Qualified Stock Option (Right to Buy)	$18.95	M	4000	Disposed	2013-01-08	Common Stock (4000)	Direct

Footnotes

F1: Includes 421 shares issued pursuant to the Issuer's Employee Stock Purchase Plan on January 31, 2011.

F2: This sale is pursuant to a 10B5-1 Sales Plan.