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TDA8947J

4-channel audio ampli鏗乪r (SE: 1 W to 25 W; BTL: 4 W to 50 W)

Rev. 01 鈥?06 February 2004

Preliminary data

1. General description

The TDA8947J contains four identical audio power ampli鏗乪rs. The TDA8947J can be

used as: four Single-Ended (SE) channels with a 鏗亁ed gain of 26 dB, two times

Bridge-Tied Load (BTL) channels with a 鏗亁ed 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 TDA8947J

is pin compatible with the TDA8944AJ and TDA8946AJ.

The TDA8947J contains a unique protection circuit that is solely based on multiple

temperature measurements inside the chip. This gives maximum output power for all

supply voltages and load conditions with no unnecessary audio holes. Almost any

supply voltage and load impedance combination can be made as long as thermal

boundary conditions (number of channels used, external heatsink and ambient

temperature) allow it.

2. Features

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SE: 1 W to 25 W, BTL: 4 W to 50 W operation possibility (2.1 system)

Soft clipping

Standby and mute mode

No on/off switching plops

Low standby current

High supply voltage ripple rejection

Outputs short-circuit protected to ground, supply and across the load

Thermally protected

Pin compatible with TDA8944AJ and TDA8946AJ.

3. Applications

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Television

PC speakers

Boom box

Mini and micro audio receivers.

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