POWER INTEGRATIONS INC — Director's Dealing 2011

Feb 22, 2011

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: POWER INTEGRATIONS INC (POWI)
CIK: 0000833640
Period of Report: 2011-02-18

Reporting Person: BALAKRISHNAN BALU (President and CEO)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2011-02-18	Common Stock	M	2966	$17.75	Acquired	249118	Indirect
2011-02-18	Common Stock	S	2966	$42.5	Disposed	246152	Indirect

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2011-02-18	Non-Qualified Stock Option (right to buy)	$17.75	M	2966	Disposed	2013-01-08	Common Stock (2966)	Indirect

Holdings (Non-Derivative)

Security	Shares	Ownership
Common Stock	25000	Direct

Footnotes

F1: This sale is pursuant to a 10B5-1 Sales Plan