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Control IC tailored for Class D audio apps up to 500W/channel

Posted: 27 Sep 2005 ?? ?Print Version ?Bookmark and Share

Keywords:international rectifier? ir? irs20124s? control ic?

International Rectifier (IR) introduced a 200V control IC developed specifically for Class D audio applications up to 500W per channel. According to the company, the adjustable dead-time generation and bi-directional over-current sensing of the IRS20124S chip protect the amplifier system, and allow audio designers to simplify circuits and minimize component count for Class D audio amplifiers in home theater entertainment systems, audio-video receivers and automotive sound systems.

The internal, selectable dead-time generation circuit is thermally compensated for stability, and is immune to noise and supply voltage fluctuations to help improve total harmonic distortion or THD. In addition, the IRS20124S has built-in bi-directional current sensing and combines with an integrated shutdown function to protect the output MOSFETs when an over-current condition occurs, such as a short-circuited speaker wire.

"Circuit designers can reduce system footprints, improve PCB layouts, reduce EMI and improve thermal characteristics using IR's new Class D audio IC to drive audio MOSFETs, such as the IRF6665," said David Tam, VP, consumer and industrial sector business. "Since Class D audio circuits need to deal with switching high voltage at high frequency, IR's expertise in optimizing MOSFETs and high voltage control ICs for switching applications is a perfect match to digital audio systems. Our application-specific devices enable higher efficiency, increased power density and better audio performance," Tam added.

Priced at $1.50 each in 10,000-unit quantities, the Pb-free and RoHS-compliant IRS20124S is housed in 14-pin SOIC. Prices are subject to change.

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