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IR recently introduced the IRS20124S, a 200V control IC developed for Class D audio applications up to 500W per channel. The device's integrated adjustable dead time, bidirectional overcurrent sensing and other features protect the amplifier system. In addition, these features allow audio designers to simplify circuits and reduce the number of components in Class D audio amplifiers in home theater entertainment systems, AV receivers, and car audio systems.The built-in optional dead time generation circuit thermally compensates for stability and has immunity to noise and supply voltage fluctuations to improve total harmonic distortion THD. The IRS20124S has built-in bidirectional current sensing and an integrated shutdown function to protect the output MOSFET in the event of an overcurrent condition such as a shorted speaker lead.
Tan Zhongneng, vice president of IR Consumer and Industrial Products, pointed out: "With this new Class D audio IC to drive audio MOSFETs (such as the IRF6665), circuit designers can reduce system footprint, improve PCB layout, reduce EMI and improve thermal characteristics. ."
Mr. Tan believes that “Class D audio circuits need to withstand the high voltage variations of high frequency switching. IR MOSFETs and high voltage control ICs optimized for switching applications are ideal for digital audio systems. They are higher for special applications. Efficiency, increased power density and better audio performance."
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