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Philips Semiconductors
4
40 W BTL quad car radio power
amplifier
TEST AND APPLICATION INFORMATION
handbook, full pagewidth
input 1
470 nF
input 2
470 nF
input 3
470 nF
input 4
470 nF
Special care must be taken in the PCB-layout to separate pin V
and the inputs.
To avoid switch-on plops, it is advised to keep the amplifier in the mute mode during a period of
IN2, IN3 and IN4).
2002 Mar 05
MODE
V P1
15
1
IN1
10
30 k
IN2
11
30 k
12
SGND
TDA8571J
13
IN3
30 k
14
IN4
30 k
3
PGND1
Fig.7 Application circuit diagram.
V P
V P2
V P3
V P4
8
16
23
V ref
DIAGNOSTIC
V ref
6
18
21
PGND2
PGND3
PGND4
power ground (substrate)
from the pins IN1, IN2, IN3 and IN4 to minimize the crosstalk between the clip output
DIAG
10
Product specification
14.4 V
100 nF
2200 F
2
OUT1
R L = 4
OUT1
4
7
OUT2
R L = 4
OUT2
5
10 k
V P
V DIAG
9
diagnostic
output
17
OUT3
R L = 4
19
OUT3
22
OUT4
R L = 4
20
OUT4
MGM564
150 ms (charging the input capacitors at pins IN1,
TDA8571J
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