The RDK-203 reference design kit from Power Integrations includes a dual-rail power supply with high loop bandwidth and peak power for home systems and a 650-W audio power rating. According to the company, it enables developers to easily meet new and emerging standby power usage regulations for consumer audio-video equipment.
The kit is based on the Power Integrations PKS607YN, a member of the PeakSwitch product family. With a response time of 40 µs, 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 very 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 0.9 W at a 240-VRMS input, beating the power efficiency regulations established by Energy Star, California Energy Commission (CEC), U.S. Energy Independence and Security Act (EISA), European Commission Energy-using Products Eco-design Directive(EC EuP), and European Commission Code of Conduct (EC CoC). 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.