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Power Integrations has released the RDK-203 reference design kit, a dual-rail power supply with high loop bandwidth and peak power for home-theatre systems with up to 650W audio power rating.

The reference design allows developers to meet standby power-usage regulations for consumer audio-video equipment.

RDK-203 is based on Power Integrations’ PKS607YN, a member of the Peakswitch product family.

With a response time of 40 microseconds, amplifiers powered by Peakswitch-based power supplies can keep up with high-crest-factor, high-frequency audio signals common in high-quality digital music and DVD movie soundtracks.

By actively managing power delivery as required by the audio amplifier, Peakswitch prevents the power-rail voltage from falling during sustained high-energy segments, without requiring a large bank of output capacitors.

This ensures that the listener experiences low audio-distortion due to clipping or dynamic-range compression caused by a reduction in the amplifier’s power-supply voltage.

Independent rail regulation eliminates any coupling between the positive and negative supplies, further reducing distortion and increasing audio quality.

The RDK circuit consumes less than 0.9W at 240 Vrms input, easily beating the stringent power-efficiency regulations established by Energy Star, CEC (California Energy Commission), EISA (US Energy Independence and Security Act), EC EuP (European Commission Energy-Using Products Eco-Design Directive), and EC CoC (European Commission Code of Conduct).

The current Energy Star specification for audio products allows a standby power maximum of just one Watt.

Peakswitch ICs are available now in a variety of package options and power levels, making the product family scalable for audio applications ranging from MP3 docking stations up to large amplifiers requiring hundreds of Watts of peak power.

Power Integrations

Power Integrations is the leading supplier of high-voltage integrated circuits used in energy-efficient power conversion. The company’s innovative technology enables compact, energy-efficient power supplies in a wide range of electronic products, in AC-DC, DC-DC and LED lighting applications. Since its introduction in 1998, Power Integrations’ EcoSmartä energy-efficiency technology has saved an estimated $4.5 billion of standby energy waste and prevented millions of tons of CO2 emissions. The company’s Green Room web site provides a wealth of information about “energy vampires” and the issue of standby energy waste, along with a comprehensive guide to energy-efficiency standards around the world. Reflecting the environmental benefits of EcoSmart technology, Power Integrations is included in clean-technology stock indices sponsored by the Cleantech Group (Amex: CTIUS) and Clean Edge (Nasdaq: CELS).

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