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NXP Semiconductors - 4-channel audio amplifier

Numéro de référence TDA8947J
Description 4-channel audio amplifier
Fabricant NXP Semiconductors 
Logo NXP Semiconductors 





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TDA8947J fiche technique
TDA8947J
4-channel audio amplifier
Rev. 02 — 16 June 2005
Product data sheet
1. General description
The TDA8947J contains four identical audio power amplifiers. The TDA8947J can be used
as: four Single-Ended (SE) channels with a fixed gain of 26 dB, two times Bridge-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 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
s SE: 1 W to 25 W, BTL: 4 W to 50 W operation possibility (2.1 system)
s Soft clipping
s Standby and Mute mode
s No on/off switching plops
s Low standby current
s High supply voltage ripple rejection
s Outputs short-circuit protected to ground, supply and across the load
s Thermally protected
s Pin compatible with TDA8944AJ and TDA8946AJ
3. Applications
s Television
s PC speakers
s Boom box
s Mini and micro audio receivers

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