Service manual CL2554AN / CL2854AN
- 25 -
64
NC
Test pin
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 Description
1
OUT1-
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
Содержание CL2554AN
Страница 17: ...Service manual CL2554AN CL2854AN 16 ...
Страница 21: ...Service manual CL2554AN CL2854AN 20 ...
Страница 34: ...Service manual CL2554AN CL2854AN 33 5 Circuit description 5 1 Block diagram ...
Страница 39: ...Service manual CL2554AN CL2854AN 38 Chassis block diagram IF ...
Страница 43: ...Service manual CL2554AN CL2854AN 42 Sound signal flow diagram ...
Страница 56: ...Service manual CL2554AN CL2854AN 55 ...