1997 Mar 27

10

Philips Semiconductors

Preliminary specification

4

× 25 W BTL quad car radio power

amplifier

TDA8569Q

TEST AND APPLICATION INFORMATION

Fig.7 Application circuit diagram.

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 pin

10, 11, 13 and 14).

handbook, full pagewidth

MBK011

OUT1

+

RL = 4 Ω

OUT1

−

+

−

+

−

Vref

2

IN1

input 1

IN2

input 2

4

15

10

MODE

2200

µF

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

470 nF

470 nF

470 nF

470 nF

21

18

6

3

PGND1

PGND2

PGND3

PGND4

power ground (substrate)

OUT3

+

RL = 4 Ω

OUT3

−

+

−

+

−

Vref

17

IN3

SGND

TDA8569Q

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