Tda8946J Stereo Audio Amplifier - Daewoo DUB-2850GB Service Manual

CP-780 Service Manual

4.2 TDA8946J STEREO AUDIO AMPLIFIER

The TDA8946J is a dual-channel audio power amplifier with an output power of 2x15W at an 8
load and a 18V 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-bent-
SIL(DBS) power package.
4.2.1 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
1
2
3
4
5
6
7
8
9
10
11
12
Symbol
OUT1-
GND1
Vcc1
OUT1+
n.c.
IN1+
n.c.
IN1-
IN2-
MODE
SVR
IN2+
-24-
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