TDA8571J Datasheet, PDF (10/20 Pages) NXP Semiconductors – 4 x 40 W BTL quad car radio power amplifier

Philips Semiconductors
4 x 40 W BTL quad car radio power
amplifier
TEST AND APPLICATION INFORMATION
Preliminary specification
TDA8571J
handbook, full pagewidth
MODE
VP1
15
1
input 1
IN1 10
470 nF
30 kΩ
VP
VP2
VP3
8
16
+
−
+
−
+14.4 V
VP4
100 nF
2200 µF
23
2 OUT1+
4 OUT1−
RL = 4 Ω
input 2
IN2 11
470 nF
SGND 12
input 3
IN3 13
470 nF
+
−
30 kΩ
+
−
TDA8571J
+
−
30 kΩ
+
−
Vref
7 OUT2+
5 OUT2−
9 ^VDIAG
DIAGNOSTIC
17 OUT3+
RL = 4 Ω
10 kΩ _+VP
diagnostic
output
19 OUT3−
RL = 4 Ω
input 4
IN4 14
470 nF
+
−
30 kΩ
+
−
Vref
22 OUT4+
20 OUT4−
RL = 4 Ω
3
6
18
21
PGND1 PGND2 PGND3 PGND4
power ground (substrate)
MGM564
Special care must be taken in the PCB-layout to separate pin 9 from the pins 10, 11 13 and 14 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
10, 11, 13 and 14).
Fig.7 Application circuit diagram.
1998 Mar 13
10