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SERVICE MANUAL
1.4 Sound Power Amplifier TDA8944J (N603)
(1) General Description
The TDA8944J is a dual-channel audio power amplifier with an output power of
2 × 7 W at an 8Ω load and a 12V supply. The circuit contains two Bridge Tied Load
(BTL) amplifiers with an all-NPN output stage and standby/mute logic. The TDA8944J
comes in a 17-pin DIL-bent-SIL (DBS) power package. The TDA8944J is
printed-circuit board (PCB) compatible with all other types in the TDA894x family.
One PCB footprint accommodates both the mono and the stereo products.
(2) 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
・Printed-circuit board compatible.
(3) Block Diagram
Pinning
Fig. 11 Pin Configuration.
Fig. 10 Block Diagram
(4) Refer to Table 14 about functions and Service Data of the IC's Pin's
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