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Ref design kit enables supplies with high surge protection

Posted: 13 Oct 2006 ?? ?Print Version ?Bookmark and Share

Keywords:Power Integrations? reference design kit? RDK-83? LinkSwitch-LP? EcoSmart?

Power Integrations Inc. has rolled out a new reference design kit for energy-efficient chargers/adapters based on the company's LinkSwitch-LP ICs with EcoSmart technology.

This new reference design kit, called RDK-83, is said to reduce no-load power consumption by 79 percent compared to existing linear solutions, and features a constant-voltage charger circuit capable of withstanding 10kV common-mode or 2kV differential-mode surges. The company said this level of surge protection is often required in power supplies for products that connect to telephone lines such as cordless/wireline phones, answering machines, modems and other telecom devices.

"Designing for adequate surge protection helps minimize damage to products due to lightning strikes and other overvoltage events, thereby reduces the cost of replacement and repairs," said Richard Fassler, director of product marketing for Power Integrations. "With RDK-83 as a guide, designers can develop switched mode power supplies that will withstand 10kV surges and operate far more efficiently than supplies based on linear transformer technology."

RDK-83 contains a working 7.7V, 210mA fly back adapter circuit that operates over the universal input voltage range of 85Vac to 265Vac. As with all recent Power Integrations reference designs, it has a high average active mode efficiency of 66.6 percent and no-load power consumption of less than 220mW at 115Vac.

Included in the kit are LinkSwitch-LP samples, PCB, an engineering report on the power supply, and a PI Expert power supply design software CD-ROM. RDK-83 is priced at $100.

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