Philips TDA8569Q Datasheet

INTEGRATED CIRCUITS

DATA SH EET

TDA8569Q

4 × 25 W BTL quad car radio power
amplifier

Preliminary specification
File under Integrated Circuits, IC01

1997 Mar 27

Philips Semiconductors Preliminary specification

4 × 25 W BTL quad car radio power
amplifier

FEATURES

• Capable of driving 2 Ω loads

• Requires very few external components

• High output power

• Low output offset voltage

• Fixed gain

• Diagnostic facility (distortion, short-circuit and

temperature pre-warning)

• Good ripple rejection

• Mode select switch (operating, mute and standby)

• Load dump protection

• Short-circuit safe to ground and to V

load

• Low power dissipation in any short-circuit condition

• Thermally protected

• Reverse polarity safe

and across the

P

TDA8569Q

• Electrostatic discharge protection

• No switch-on/switch-off plop

• Flexible leads

• Low thermal resistance

• Pin compatible with the TDA8567Q.

GENERAL DESCRIPTION

The TDA8569Q is an integrated class-B output amplifier in
a 23-lead Single-In-Line (SIL) plastic power package.
It contains four amplifiers in BTL configuration, each with a
gain of 26 dB. The output power is 4 × 25 W in a 4 Ω load.

APPLICA TIONS

• The device is primarily developed for car radio
applications.

QUICK REFERENCE DATA

SYMBOL PARAMETER CONDITIONS MIN. TYP. MAX. UNIT

V

P

I

ORM

I

q(tot)

I

stb

I

sw

 input impedance 25 30 − kΩ

Z

i

P

o

SVRR supply voltage ripple rejection R

α

cs

G

v

V

n(o)

∆V

 DC output offset voltage −−150 mV

O

operating supply voltage 6 14.4 18 V
repetitive peak output current −−7.5 A
total quiescent current − 230 − mA
standby current − 0.2 100 µA
switch-on current −−80 µA

output power THD = 10% − 25 − W

=0Ω−60 − dB

s

channel separation Rs=10kΩ−50 − dB
closed loop voltage gain 25 26 27 dB
noise output voltage Rs=0Ω−−120 µV

ORDERING INFORMATION

TYPE

NUMBER

NAME DESCRIPTION VERSION

PACKAGE

TDA8569Q DBS23P plastic DIL-bent-SIL power package; 23 leads (straight lead length 3.2 mm) SOT411-1

1997 Mar 27 2

Philips Semiconductors Preliminary specification

4 × 25 W BTL quad car radio power
amplifier

BLOCK DIAGRAM

handbook, full pagewidth

IN1

IN2

SGND

IN3

MODE

10

11

12

13

V

30 kΩ

30 kΩ

TDA8569Q

30 kΩ

P1

TDA8569Q

V

P2

V

+

P3

V

P4

23168115

2

OUT1+

−

+

4

OUT1−

−

V

ref

+

7

OUT2+

−

+

5

OUT2−

−

9

DIAGNOSTIC

+

V

DIAG

17

OUT3+

−

+

19

OUT3−

−

14

IN4

30 kΩ

PGND1 PGND2 PGND3 PGND4

Fig.1 Block diagram.

1997 Mar 27 3

V

ref

+

22

OUT4+

−

+

20

OUT4−

−

211863

MBK010

Philips Semiconductors Preliminary specification

4 × 25 W BTL quad car radio power
amplifier

PINNING

SYMBOL PIN DESCRIPTION

V

P1

OUT1+ 2 output 1+
PGND1 3 power ground 1
OUT1− 4 output 1−
OUT2− 5 output 2−
PGND2 6 power ground 2
OUT2+ 7 output 2+
V

P2

V

DIAG

IN1 10 input 1
IN2 11 input 2
SGND 12 signal ground
IN3 13 input 3
IN4 14 input 4
MODE 15 mode select switch input
V

P3

OUT3+ 17 output 3+
PGND3 18 power ground 3
OUT3− 19 output 3−
OUT4− 20 output 4−
PGND4 21 power ground 4
OUT4+ 22 output 4+
V

P4

1 supply voltage 1

8 supply voltage 2
9 diagnostic output

16 supply voltage 3

23 supply voltage 4

handbook, halfpage

V

P1

OUT1+

PGND1

OUT1−
OUT2−

PGND2

OUT2+

V

P2

V

DIAG

IN1
IN2

SGND

IN3
IN4

MODE

V

P3

OUT3+

PGND3

OUT3−
OUT4−

PGND4

OUT4+

V

P4

1
2
3
4
5
6
7
8

9
10
11

TDA8569Q

12
13
14
15
16
17
18
19
20
21
22
23

TDA8569Q

MBK009

1997 Mar 27 4

Fig.2 Pin configuration.

Philips Semiconductors Preliminary specification

4 × 25 W BTL quad car radio power
amplifier

FUNCTIONAL DESCRIPTION

The TDA8569Q contains four identical amplifiers which
can be used for bridge applications. The gain of each
amplifier is fixed at 26 dB.

Mode select switch (pin 15)

• Standby: low supply current (<100 µA)

• Mute: input signal suppressed

• Operating: normal on condition.

Since this pin has a low input current (<80 µA), a low cost
supply switch can be applied.

To avoid switch-on plops, it is advised to keep the amplifier
in the mute mode during ≥150 ms (charging of the input
capacitors at pins 10, 11, 13 and 14).

This can be realized by:

• Microprocessor control

• External timing circuit (see Fig.3).

Diagnostic output (pin 9)

YNAMIC DISTORTION DETECTOR (DDD)

D
At the onset of clipping of one or more output stages, the

dynamic distortion detector becomes active and pin 9
goes LOW. This information can be used to drive a sound
processor or DC volume control to attenuate the input
signal and so limit the distortion. The output level of pin 9
is independent of the number of channels that are clipping
(see Fig.4).

TDA8569Q

HORT-CIRCUIT DIAGNOSTIC

S
When a short-circuit occurs at one or more outputs to

ground or to the supply voltage, the output stages are
switched off until the short-circuit is removed and the
device is switched on again, with a delay of approximately
10 ms after removal of the short-circuit. During this
short-circuit condition, pin 9 is continuously LOW.

When a short-circuit occurs across the load of one or more
channels, the output stages are switched off during
approximately 10 ms. After that time it is checked during
approximately 50 µs to determine whether the short-circuit
is still present.
Due to this duty cycle of 50 µs/10 ms the average current
consumption during this short-circuit condition is very low.

During this short-circuit condition, pin 9 is LOW for 10 ms
and HIGH for 50 µs (see Fig.5). The protection circuits of
all channels are coupled. This means that if a short-circuit
condition occurs in one of the channels, all channels are
switched off. Consequently, the power dissipation in any
short-circuit condition is very low.

EMPERATURE PRE-WARNING

T
When the virtual junction temperature Tvj reaches 145 °C,

pin 9 goes LOW.

PEN COLLECTOR OUTPUTS

O
The diagnostic pin has an open collector output, so more

devices can be tied together. An external pull-up resistor is
needed.

V

handbook, halfpage

P

10 kΩ 10 kΩ

47 µF

mode
select
switch

100 kΩ

MGA708

Fig.3 Mode select switch circuitry.

1997 Mar 27 5

handbook, halfpage

V

V

V

Fig.4 Distortion detector waveform.

o

0

9

P

0

MGG155

t

Philips Semiconductors Preliminary specification

4 × 25 W BTL quad car radio power
amplifier

handbook, full pagewidth

short

circuit

current

V

9

short-circuit over the load

V

P

TDA8569Q

MGG156

t

10 ms

t

50 µs

Fig.5 Short-circuit waveform.

1997 Mar 27 6