Power Integrations Added to NASDAQ Clean-Energy Stock Indices

September 24, 2007

SAN JOSE, Calif., Sep 24, 2007 (PrimeNewswire via COMTEX News Network) --

Power Integrations (Nasdaq:POWI), the leader in high-voltage analog integrated circuits for power conversion and the inventor of EcoSmart(r) energy-efficiency technology, today announced its inclusion in two NASDAQ stock indices tracking the stocks of companies offering clean-energy and energy-efficiency technologies. Effective with the market open today, the company's stock will be included in the NASDAQ Clean Edge U.S. Index (Nasdaq:CLEN) and the Clean Edge U.S. Liquid Series Index (Nasdaq:CELS).

Power Integrations integrated circuits with EcoSmart technology are used in power supplies, which convert high-voltage AC power from a wall outlet into the low-voltage DC power needed by most electronic products, including computer and A/V equipment, home appliances, cellphone chargers and other AC adapters. EcoSmart technology intelligently manages the flow of power through a power supply, reducing energy consumption during normal operation, maximizing efficiency during light load or "standby" power conditions and cutting no-load losses in charger applications by up to 97 percent. According to Lawrence Berkeley National Laboratory, no-load and standby losses (the power consumed while an electronic product is in its lowest-power mode) have been estimated to account for up to 10 percent of residential electricity consumption in OECD countries.

Since 1998, Power Integrations has sold more than 1.6 billion chips with EcoSmart technology. As a result, consumers and businesses have saved an estimated $2.4 billion on their electricity bills, and an estimated 14 million tons of carbon dioxide emissions have been averted.

"Innovative technologies hold the key to solving the world's energy-related concerns," said Balu Balakrishnan, president and CEO of Power Integrations. "Inclusion in the NASDAQ Clean Edge indices is an acknowledgement of Power Integrations' role in reducing energy usage and the related carbon emissions."

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 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. For information on global energy-efficiency standards and EcoSmart solutions, visit the Power Integrations Green Room at www.powerint.com/greenroom.

This news release was distributed by PrimeNewswire, www.primenewswire.com

SOURCE: Power Integrations

Power Integrations, Inc.
          Joe Shiffler
          (408) 414-8528


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