Test and application information – Philips TDA8571J User Manual
Page 10
2002 Mar 05
10
Philips Semiconductors
Product specification
4
×
40 W BTL quad car radio power
amplifier
TDA8571J
TEST AND APPLICATION INFORMATION
Fig.7 Application circuit diagram.
Special care must be taken in the PCB-layout to separate pin V
DIAG
from the pins IN1, IN2, IN3 and IN4 to minimize the crosstalk between the clip output
and the inputs.
To avoid switch-on plops, it is advised to keep the amplifier in the mute mode during a period of
≥
150 ms (charging the input capacitors at pins IN1,
IN2, IN3 and IN4).
handbook, full pagewidth
MGM564
OUT1
+
RL = 4
Ω
OUT1
−
+
−
+
−
Vref
2
IN1
input 1
IN2
input 2
4
15
10
MODE
2200
µ
F
100 nF
23
+
14.4 V
16
8
1
VP1
VP2
VP3
VP4
VP
30 k
Ω
OUT2
+
RL = 4
Ω
OUT2
−
+
−
+
−
7
5
11
30 k
Ω
21
18
6
3
PGND1
PGND2
PGND3
PGND4
power ground (substrate)
OUT3
+
RL = 4
Ω
OUT3
−
+
−
+
−
Vref
17
IN3
SGND
TDA8571J
input 3
IN4
input 4
19
13
12
30 k
Ω
OUT4
+
RL = 4
Ω
OUT4
−
+
−
+
−
22
20
14
30 k
Ω
10 k
Ω
VDIAG
+
VP
DIAGNOSTIC
diagnostic
output
9
470 nF
470 nF
470 nF
470 nF