SERVICE MANUAL
2. AUDIO POWER AMPLIFIER TDA8943SF
6 W MONO BRIDGE TIED LOAD (BTL) AUDIO AMPLIFIER
1). General description
The TDA8943SF is a single-channel audio power amplifier with an output power of
6 W at an 8
Ω
load and a 12 V supply. The circuit contains a Bridge Tied Load (BTL)
amplifier with an all-NPN output stage and standby/mute logic. The TDA8943SF
comes in a 9-lead single in-line (SIL) medium power package. The TDA8943SF 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
❷
Fixed gain
❷
Standby and mute mode
❷
No on/off switching plops
❷
Low standby current
❷
High supply voltage ripple rejection
❷
Outputs short-circuit protected to ground, supply and across the load
❷
Thermally protected
❷
Printed-circuit board compatible.
3). Block diagram
Fig. 11
4). Pinning information
30