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TDA8947J4-channel audio amplifier (SE: 1 W to 25 W; BTL: 4 W to 50 W)Rev. 01 — 06 February 2004 Preliminary data1. General descriptionThe TDA8947J contains four identical audio power amplifiers. The TDA8947J can beused as: four Single-Ended (SE) channels with a fixed gain of 26 dB, two timesBridge-Tied Load (BTL) channels with a fixed gain of 32 dB or two times SE channels(26 dB gain) plus one BTL channel (32 dB gain) operating as a 2.1 system.The TDA8947J comes in a 17-pin Dil-Bent-Sil (DBS) power package. The TDA8947Jis pin compatible with the TDA8944AJ and TDA8946AJ.The TDA8947J contains a unique protection circuit that is solely based on multipletemperature measurements inside the chip. This gives maximum output power for allsupply voltages and load conditions with no unnecessary audio holes. Almost anysupply voltage and load impedance combination can be made as long as thermalboundary conditions (number of channels used, external heatsink and ambienttemperature) allow it.2. Featuresn SE: 1 W to 25 W, BTL: 4 W to 50 W operation possibility (2.1 system)n Soft clippingn Standby and mute moden No on/off switching plopsn Low standby currentn High supply voltage ripple rejectionn Outputs short-circuit protected to ground, supply and across the loadn Thermally protectedn Pin compatible with TDA8944AJ and TDA8946AJ.3. Applicationsn Televisionn PC speakersn Boom boxn Mini and micro audio receivers.