TDA8565Q 查看數據表（PDF） - Philips Electronics

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TDA8565Q

4 × 12 W single-ended car radio power amplifier with diagnostic interface

Philips Electronics 

Philips Semiconductors

4 × 12 W single-ended car radio

power amplifier with diagnostic interface

Product specification

TDA8565Q

PINNING

SYMBOL

IN1

SGND

IN2

SVRR

VP1

OUT1

GND1

OUT2

n.c.

OUT3

GND2

OUT4

VP2

MODE

IN3

VDIAG

IN4

PIN

DESCRIPTION

1 input 1

2 signal ground

3 input 2

4 supply voltage ripple rejection

5 supply voltage 1

6 output 1

7 power ground 1

8 output 2

9 not connected

10 output 3

11 power ground 2

12 output 4

13 supply voltage 2

14 mode select switch input

15 input 3

16 diagnostic output

17 input 4

FUNCTIONAL DESCRIPTION

The TDA8565Q contains four identical amplifiers which

can be used for single-ended applications. The gain of

each amplifier is fixed at 40 dB. Special features of the

device are as follows.

dbook, halfpage

IN1 1

SGND 2

IN2 3

SVRR 4

V P1 5

OUT1 6

GND1 7

OUTP2 8

n.c. 9 TDA8565Q

OUT3 10

GND2 11

OUTP4 12

V P2 13

MODE 14

IN3 15

V DIAG 16

IN4 17

MLC393

Fig.2 Pin configuration.

Mode select switch (pin 14)

• Low standby current (<100 µA)

• Low switching current (low cost supply switch)

• Mute facility.

To avoid switch-on plops, it is advised to keep the amplifier

in the mute mode during ≥100 ms (charging of the input

capacitors at pins 1, 3, 15 and 17).

This can be achieved by:

• Microcontroller control

• External timing circuit (see Fig.3).

The circuit in Fig.3 slowly ramps up the voltage at the

mode select switch pin when switching on and results in

fast muting when switching off.

In the event of fast switching at mode select pin it is

advised to increase the 1⁄2VP decoupling capacitor (pin 4)

to 150 µF to avoid switch plops.

handbook, halfpage VP

10 kΩ

47 µF

100 Ω

mode

select

switch

100 kΩ

MGA708

Fig.3 Mode select switch circuitry.

1995 Dec 08

4

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