Philips Semiconductors

TDA8947J

4-channel audio amplifier

Preliminary data

Rev. 01 — 06 February 2004

16 of 24

9397 750 10779

© Koninklijke Philips Electronics N.V. 2004. All rights reserved.

Remark: Because of switching inductive loads, the output voltage can rise beyond

the maximum supply voltage of 28 V. At high supply voltages, it is recommended to

use (Schottky) diodes to the supply voltage and ground.

Fig 13. Application diagram with one pin control and reduction of capacitor.

VCC1

VCC2

16

220 nF

IN1

+

IN2

+

OUT1

+

OUT2

−

Vi

220 nF

Vi

RL

4

Ω

RL

4

Ω

450

µF

1

4

VCC

1000

µF

100 nF

470 nF

IN3

+

IN4

+

OUT3

−

OUT4

+

Vi

RL

8

Ω

−

+

−

+

−

+

MICRO-

CONTROLLER

22

µF

VCC

215

GND1

GND2

60 k

Ω

60 k

Ω

3

8

6

60 k

Ω

60 k

Ω

9

12

14

17

TDA8947J

MUTE 3

+4

ON 3

+4

MDB018

STANDBY ALL

MUTE ALL

ON 1

+2

0.5VCC

VCC

CIV 13

MODE1

SGND

10

7

SVR 11

MODE2 5

SHORT-CIRCUIT

AND

TEMPERATURE

PROTECTION

Vref

150

µF