Jury Upholds Validity of Power Integrations Patents

Company to Request Permanent Injunction and Enhancement of Damage Award


SAN JOSE, Calif., Sept. 21, 2007 (PRIME NEWSWIRE) -- Power Integrations (Nasdaq:POWI), the leader in high-voltage analog integrated circuits for power conversion, today announced that a jury has upheld the validity of all four patents asserted by the company in its patent-infringement lawsuit against Fairchild Semiconductor. In October 2006, a separate jury found that Fairchild willfully infringed the four patents, and awarded Power Integrations damages of approximately $34 million.

Power Integrations will now request a permanent injunction against the continued manufacture, importation and sale of the infringing Fairchild parts. All of the Fairchild parts listed below were found to infringe and may be subject to an injunction. These parts are currently found in such end products as cellphone chargers, DVD players, TV set-top boxes, LCD monitors and others. The list below should not be considered comprehensive; Power Integrations will ask that the injunction extend to parts that are not materially different from the listed parts.

The company will also request enhancement of the damage award based on the prior jury's finding of willfulness. Separately, the company is seeking the dismissal of Fairchild's suit against Power Integrations. A hearing is set for that motion on October 5, 2007.

"We expect our competitors to respect our intellectual property, and we are committed to combating any unlawful infringement that harms our business," said Balu Balakrishnan, president and CEO of Power Integrations. "These two verdicts against Fairchild reaffirm the value of independent invention and creativity in our industry."


 List of infringing Fairchild parts:

 FSD200            FSDH321L               FSDH0265RL
 FSD200B           FSDL0165RN             FSDL0365RL
 FSD210            FSDM0265RN             FSDM0365RL
 FSD210B           FSDM0265RNB            FSDM311
 FSD210H           FSDH0265RN             FSCM0565R
 FSD210HD          FSDL0365RN             FSCM0765R
 FSD211            FSDL0365RNB            FSDM0565
 FSD500            FSDM0365RN             FSDM07652
 FSDL321           FSDM0365RNB            FSDH565
 FSDL321L          FSDL0165RL             FSDH0165
 FSDH321           FSDM0265RL             FAN7601

Note Regarding Forward-Looking Statements

This press release contains forward-looking statements reflecting management's intentions with respect to requesting an injunction, enhancement of damages and dismissal of Fairchild's suit against Power Integrations. These forward-looking statements are based on current information that is, by its nature, subject to change. Forward-looking statements are denoted by the use of the words and phrases as "will" and "is seeking." Actual results could differ materially from those projected or implied due to risks and uncertainties associated with the company's business and with patent litigation. These risks and uncertainties include, but are not limited to, the fact that the judge overseeing the case has substantial discretion over the amount of the damage award and the scope of the injunction, if any, that is placed on Fairchild's products; the fact that the outcome of the case is subject to appeal; and the fact that there can be no assurance that any amount of damages will be paid to Power Integrations. General risk factors associated with the company's business are discussed in the company's most recent report on Forms 10-K and 10-Q filed with the Securities and Exchange Commission. The company is under no obligation (and expressly disclaims any obligation) to update or alter its forward-looking statements, whether as a result of new information, future events or otherwise.

About Power Integrations

Power Integrations, Inc. is the leading supplier of high-voltage analog integrated circuits used in power conversion. The company's breakthrough technology enables compact, energy-efficient power supplies in a wide range of electronic products, in both AC-DC and DC-DC applications. The company's EcoSmart(r) energy-efficiency technology, which dramatically reduces energy waste, has saved consumers and businesses around the world more than an estimated $2.4 billion on their electricity bills since its introduction in 1998. For more information, visit the company's website at www.powerint.com.



            

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