Philips TDA8561Q Datasheet

INTEGRATED CIRCUITS

DATA SH EET

TDA8561Q

2 × 24 W BTL or 4 × 12 W
single-ended car radio power
amplifier

Product specification
Supersedes data of 1997 Sep 22
File under Integrated Circuits, IC01

1999 Jun 30

Philips Semiconductors Product specification

2 × 24 W BTL or 4 × 12 W single-ended
car radio power amplifier

FEATURES

• Requires very few external components

• High output power

• Flexibility in use; Quad single-ended or stereo BTL

• Low output offset voltage

• Fixed gain

• Diagnostic facility (distortion, short-circuit and

temperature detection)

• Good ripple rejection

• Mode select switch (operating, mute and standby)

• Load dump protection

• AC and DC short-circuit safe to ground and to V

• Low power dissipation in any short-circuit condition

• Thermally protected

QUICK REFERENCE DATA

P

TDA8561Q

• Reverse polarity safe

• Electrostatic discharge protection

• No switch-on/switch-off plop

• Flexible leads

• Low thermal resistance

• Identical inputs (inverting and non-inverting).

GENERAL DESCRIPTION

The TDA8561Q is an integrated class-B output amplifier in
a 17-lead single-in-line (SIL) power package. It contains
4 × 12 W Single-Ended (SE) or 2 × 24 W Bridge-Tied
Load (BTL) amplifiers.

The device is primarily developed for car radio
applications.

SYMBOL PARAMETER CONDITIONS MIN. TYP. MAX. UNIT

V

P

I

ORM

I

P

I

sb

positive operating supply voltage 6 14.4 18 V
repetitive peak output current −−4A
total quiescent current − 80 − mA
standby current − 0.1 100 µA

Stereo BTL application

P

o

output power RL=4Ω; THD = 10% − 24 − W
RR supply voltage ripple rejection 46 −−dB
V

no

Z

 input impedance 25 −−kΩ

I

| DC output offset voltage −−150 mV

∆V

O

noise output voltage Rs=0Ω−70 −µV

Quad single-ended application

P

o

output power THD = 10%

R

=4Ω−7−W

L

=2Ω−12 − W

R

L

RR supply voltage ripple rejection 46 −−dB
V

no

Z

 input impedance 50 −−kΩ

I

noise output voltage Rs=0Ω−50 −µV

ORDERING INFORMATION

TYPE

NUMBER

NAME DESCRIPTION VERSION

PACKAGE

TDA8561Q DBS17P plastic DIL-bent-SIL power package; 17 leads (lead length 12 mm) SOT243-1

1999 Jun 30 2

Philips Semiconductors Product specification

2 × 24 W BTL or 4 × 12 W single-ended
car radio power amplifier

BLOCK DIAGRAM

non-inverting

input 1

inverting

input 2

supply voltage
ripple rejection

non-inverting

input 4

1

60
kΩ

2

kΩ

60
kΩ

3

2

kΩ

x1

4

17

60
kΩ

2

kΩ

18 kΩ

18 kΩ

stand-by

switch

VA

15 kΩ

15 kΩ

mute switch

VA

mute switch

VA

V

P

mute switch

VA

C

m

C

m

PROTECTIONS

thermal

short-circuit

mute
reference
voltage

C

m

power stage

power stage

stand-by
reference
voltage

mute
switch

V

P1

5

13

TDA8561Q

TDA8561Q

V

P2

6

output 1

8

output 2

mode

14

select

switch

16

diagnostic

output

12

output 4

18 kΩ

mute switch

60
kΩ

inverting

input 3

15

2

kΩ

input
reference
voltage

2711

ground
(signal)

VA

18 kΩ

9

not connected

Fig.1 Block diagram.

1999 Jun 30 3

C

m

GND1 GND2

power ground (substrate)

power stage

power stage

MEA858 - 1

10

output 3

Philips Semiconductors Product specification

2 × 24 W BTL or 4 × 12 W single-ended
car radio power amplifier

PINNING

SYMBOL PIN DESCRIPTION

−INV 1 1 non-inverting input 1
GND(S) 2 signal ground
INV 2 3 inverting input 2
RR 4 supply voltage ripple rejection
V

P1

OUT 1 6 output1
GND1 7 power ground 1
OUT 2 8 output2
n.c. 9 not connected
OUT 3 10 output 3
GND2 11 power ground 2
OUT 4 12 output 4
V

P2

MODE 14 mode select switch input
INV 3 15 inverting input 3
V

DIAG

−INV 4 17 non-inverting input 4

5 supply voltage

13 supply voltage

16 diagnostic output

INV 1

GND(S)

INV 2

RR

V

P1

OUT 1

GND1

OUT 2

n.c.

OUT 3

GND2

OUT 4

V

P2

MODE

INV 3

V

DIAG
INV 4

1
2
3
4
5
6
7
8

9
10
11
12

13
14
15
16

17

TDA8561Q

TDA8561Q

MEA859 - 1

Fig.2 Pin configuration.

1999 Jun 30 4

Philips Semiconductors Product specification

2 × 24 W BTL or 4 × 12 W single-ended
car radio power amplifier

FUNCTIONAL DESCRIPTION

The TDA8561Q contains four identical amplifiers and can
be used for Single-Ended (SE) or Bridge-Tied Load (BTL)
applications. The gain of each amplifier is fixed at 20 dB
(26 dB in BTL). Special features of the device are:

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.11).

Diagnostic output (pin 16)

TDA8561Q

During this short-circuit condition, pin 16 is LOW for 20 ms
and HIGH for 50 µs (see Fig.5).

The power dissipation in any short-circuit condition is very
low.

handbook, halfpage

V

O

0

V

16

V

P

0

MGA705

t

D

YNAMIC DISTORTION DETECTOR (DDD)

At the onset of clipping of one or more output stages, the
dynamic distortion detector becomes active and pin 16
goes LOW. This information can be used to drive a sound
processor or DC volume control to attenuate the input
signal and thus limit the distortion. The output level of
pin 16 is independent of the number of channels that are
clipping (see Figs 3 and 4).

S

HORT-CIRCUIT PROTECTION

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
20 ms, after removal of the short-circuit. During this
short-circuit condition, pin 16 is continuously LOW.

When a short-circuit across the load of one or both
channels occurs the output stages are switched off for
approximately 20 ms. After that time it is checked during
approximately 50 µs to see whether the short-circuit is still
present. Due to this duty cycle of 50 µs/20 ms the average
current consumption during this short-circuit condition is
very low (approximately 40 mA).

Fig.3 Distortion detector waveform; BTL

application.

handbook, halfpage

V

O

0

V

16

V

P

0

MGA706

t

Fig.4 Distortion detector waveform; single-ended

application.

1999 Jun 30 5

Philips Semiconductors Product specification

2 × 24 W BTL or 4 × 12 W single-ended
car radio power amplifier

handbook, full pagewidth

TEMPERATURE DETECTION

current

in

output

stage

V

16

short-circuit over the load

V

P

Fig.5 Short-circuit waveform.

TDA8561Q

MGL214

t

20 ms

t

50 µs

When the virtual junction temperature Tvjreaches 150 °C, pin 16 will be active LOW.

O

PEN-COLLECTOR OUTPUT

Pin 16 is an open-collector output, which allows pin 16 of more devices being tied together.

LIMITING VALUES

In accordance with the Absolute Maximum Rating System (IEC 134).

SYMBOL PARAMETER CONDITIONS MIN. MAX. UNIT

v

P

positive supply voltage

operating − 18 V
non-operating − 30 V

≥ 2.5 ms − 45 V

r

I

OSM

I

ORM

T

stg

T

amb

T

vj

V

psc

V

pr

P

tot

load dump protection during 50 ms; t
non-repetitive peak output current − 6A
repetitive peak output current − 4A
storage temperature −55 +150 °C
operating ambient temperature −40 +85 °C
virtual junction temperature − 150 °C
AC and DC short-circuit safe voltage − 18 V
reverse polarity − 6V
total power dissipation − 60 W

1999 Jun 30 6

Philips Semiconductors Product specification

2 × 24 W BTL or 4 × 12 W single-ended

TDA8561Q

car radio power amplifier

THERMAL CHARACTERISTICS

In accordance with IEC 747-1.

SYMBOL PARAMETER VALUE UNIT

R

th j-a

R

th j-c

handbook, halfpage

thermal resistance from junction to ambient in free air 40 K/W
thermal resistance from junction to case (see Figs 6 and 7) 1.3 K/W

virtual junction

output 3 output 4

3.0 K/W

3.0 K/W

0.7 K/W

virtual junction

2.2 K/W

handbook, halfpage

output 1 output 2

output 1 output 2

3.0 K/W

2.2 K/W

0.7 K/W

3.0 K/W

0.2 K/W

case

MEA861 - 1

Fig.6 Equivalent thermal resistance network;

BTL application.

MEA860 - 2

0.2 K/W

case

Fig.7 Equivalent thermal resistance network;

single-ended application.

1999 Jun 30 7

Philips Semiconductors Product specification

2 × 24 W BTL or 4 × 12 W single-ended

TDA8561Q

car radio power amplifier

DC CHARACTERISTICS

V

= 14.4 V; T

P

SYMBOL PARAMETER CONDITIONS MIN. TYP. MAX. UNIT

Supply

V

P

I

P

V

O

 DC output offset voltage −−150 mV

∆V

O

Mode select switch

V

on

MUTE CONDITION
V

mute

V

O

∆V

 DC output offset voltage (between

O

STANDBY CONDITION
V

sb

I

sb

I

sw

Diagnostic output (pin 16)

V

DIAG

=25°C; measured in Fig.8; unless otherwise specified.

amb

positive supply voltage note 1 6 14.4 18 V
total quiescent current − 80 160 mA
DC output voltage note 2 − 6.9 − V

switch-on voltage level 8.5 −−V

mute voltage 3.3 − 6.4 V
output voltage in mute position V

= 1 V; f = 1 kHz −−2mV

Imax

−−150 mV

pins 6 to 8 and 10 to 12)

standby voltage 0 − 2V
standby current −−100 µA
switch-on current − 12 40 µA

diagnostic output voltage any short-circuit or clipping −−0.6 V

Notes

1. The circuit is DC adjusted at V

= 6 to 18 V and AC operating at VP= 8.5 to 18 V.

P

2. At 18V<VP< 30 V the DC output voltage ≤0.5VP.

1999 Jun 30 8