TDA8943SF
7 W mono Bridge Tied Load (BTL) audio amplifier
14 April 1999 Preliminary specification
1. General description
The TDA8943SF is a single-channel audio power amplifier with an output power of
7 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
■ 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, see Table 3 “Product family overview”.
3. Applications
■ Mains fed applications (e.g. TV sound)
■ PC audio
■ Portable audio.
4. Quick reference data
Table 1: Quick reference data
Symbol Parameter Conditions Min Typ Max Unit
V
CC
supply voltage 6 12 18 V
I
q
quiescent supply current V
CC
=12V; R
L
=∞ - 1522mA
I
stb
standby supply current - - 10 µA
