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4-3 TDA894xJ family Stereo Audio Amplifier
The TDA8946J is a dua-channel audio power amplifier with an output power of 2 x 7W at an 8 ohm 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 TDA8946J 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 Description
1
OUT-
negative loudspeaker terminal 1
2
GND1
ground channel 1
3
Vcc1
supply voltage channel 1
4
OUT1+ positive loudspeaker terminal 1
5
n.c.
not connected
6
IN1+
positive input1
7
n.c.
not connected
8
IN1-
negative input1
9
IN2-
negative input2
10
MODE
mode selection input
11
SVR
half supply voltage decoupling
(ripple rejection)
12
IN2+
positive input2
-23-
Service Manual CP-785A
1
OUT1-
2
GND1
3
Vcc1
4
OUT1+
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
MBK936
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