Tda894Xj Stereo Audio Amplifier; Features - Daewoo DTH-29U3 Service Manual

CP830F Service Manual

4.6 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 ? 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.

4.6.1 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
OUT1- 1
GND1 2
3
Vcc1
OUT1+ 4
n.c. 5
IN1+ 6
n.c. 7
IN1- 8
TDA8944J
IN2-
9
MODE 10
SVR
11
IN2+
12
n.c
13
OUT2+
14
GND2
15
Vcc2
16
OUT2-
17
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