Tda894Xj Stereo Audio Amplifier - Daewoo DTA-20 T1 Service Manual

Pin No. Pin Name
56 AVSS
57 AVSUP
58 ANA_IN1+
59 ANA_IN1-
60 NC
61 TESTEN
62 XTAL_IN
63 XTAL_OUT
64 NC

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+
Type
Analog ground
Analog power supply
In IF input 1
In IF common
Not Connected
In Test pin
In Crystal oscillator
Out Crystal oscillator
Test pin
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 CP 385 / CP785
Short description
- 25 -