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4-3 TDA894xJ Stereo Audio Amplifier
The TDA 8944J ( TDA 8946J ) is a dual-channel audio power amplifier with an output power
of 2 x 7 W ( 2 x 15 W ) at an 8 W load and a 12 V supply. The circuit contains two Bridges
Tied Load (BTL) amplifiers with an all-NPN output stage and standby/mute logic. The
TDA8944J comes in a 17-pin DIL power package.
Features
Few external components
Fixed gain
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 description
Pin
Symbol
1
OUT1-
2
GND1
3
Vcc1
4
OUT1+
5
n.c.
6
IN1+
7
n.c.
8
IN1-
9
IN2-
10
MODE
11
SVR
12
IN2+
Description
negative loudspeaker terminal 1
ground channel 1
supply voltage channel 1
positive loudspeaker terminal
1
not connected
positive input1
not connected
negative input1
negative input2
mode selection input
half supply voltage decoupling
(ripple rejection)
positive input2
Service manual CL2554AN / CL2854AN
Test pin
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