Exhibit 31.1
CERTIFICATION OF CHIEF EXECUTIVE OFFICER
I, Balu Balakrishnan, Chief Executive Officer of the registrant, certify that:
1. I have reviewed this Amendment No. 2 to Annual Report on Form 10-K/A of Power Integrations, Inc.; and
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.
| Dated: September 27, 2007 | By: | /s/ BALU BALAKRISHNAN | ||||||
Balu Balakrishnan Chief Executive Officer | ||||||||
