Philips Semiconductors
Product specification
2 x 22 W BTL stereo car radio power
amplifier with speaker protection
TDA1557Q
handbook, full pagewidth
10
3
POWER
STAGE
V
P
mute switch
CM
1
input 1
4
VA
output 1A
30 kΩ
183 Ω
18.1 kΩ
POWER
STAGE
mute switch
CM
6
VA
output 1B
183 Ω
18.1 kΩ
TDA1557Q
V
P
11
mute/stand-by
stand-by
switch
input
reference
voltage
stand-by
reference
voltage
12
VA
mute
switch
15 kΩ
15 kΩ
x1
loudspeaker
protection
mute
reference
voltage
POWER
STAGE
mute switch
CM
13
input 2
9
VA
output 2B
30 kΩ
183
Ω
18.1 kΩ
POWER
STAGE
mute switch
CM
7
VA
input
reference
voltage
output 2A
183
Ω
18.1 kΩ
5
8
2
MCD324 - 1
signal ground
power ground
Fig.1 Block diagram.
3
May 1992
NXP [ NXP ]
