Philips TDA8562Q Datasheet
INTEGRATED CIRCUITS
DATA SH EET
TDA8562Q
4 x 12 W single-ended car radio
power amplifier with dynamic
distortion detector and diagnostic
interface
Product specification
File under Integrated Circuits, IC01
July 1994
Philips Semiconductors Product specification
4 x 12 W single-ended car radio power amplifier with
TDA8562Q
dynamic distortion detector and diagnostic interface
FEATURES
• Requires very few external components
• High output power
• Fixed gain
• Diagnostic facility (distortion, short-circuit and
temperature detection)
• Good ripple rejection
• Mode select switch (operating, mute and stand-by)
• Load dump protection
• AC and DC short-circuit safe to ground and to V
P
• Low power dissipation in any short-circuit condition
QUICK REFERENCE DATA
SYMBOL PARAMETER CONDITIONS MIN. TYP. MAX. UNIT
V
P
I
ORM
I
P
I
sb
P
o
positive operating supply voltage 6 14.4 18 V
repetitive peak output current −−4A
total quiescent current − 80 − mA
stand-by current − 0.1 100 µA
output power THD = 10%
RR supply voltage ripple rejection 48 −−dB
V
no
input impedance 50 −−kΩ
Z
I
noise output voltage Rs = 0 Ω−50 −µV
• Thermally protected
• Reverse polarity safe
• Electrostatic discharge protection
• No switch-on/switch-off plop
• Flexible leads
• Low thermal resistance
• Identical inputs.
GENERAL DESCRIPTION
The TDA8562Q is an integrated class-B output amplifier in
a 17-lead single-in-line (SIL) power package. It contains
4 × 12 W single-ended amplifiers.
4 Ω−7−W
2Ω−12 − W
ORDERING INFORMATION
EXTENDED TYPE NUMBER
PINS PIN POSITION MATERIAL CODE
TDA8562Q
(1)
17 DBS plastic SOT243R
Note
1. SOT243-1; 1996 August 21.
July 1994 2
PACKAGE
Philips Semiconductors Product specification
4 x 12 W single-ended car radio power amplifier with
dynamic distortion detector and diagnostic interface
handbook, full pagewidth
input 1
input 2
supply voltage
ripple rejection
input 4
1
60
kΩ
2
kΩ
60
kΩ
3
2
kΩ
stand-by
x1
4
17
60
kΩ
2
kΩ
18 kΩ
18 kΩ
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
TDA8562Q
TDA8562Q
V
P2
6
output 1
8
output 2
mode
14
select
switch
16
diagnostic
output
12
output 4
18 kΩ
input 3
mute switch
60
kΩ
15
2
kΩ
input
reference
voltage
2711
ground
(signal)
VA
18 kΩ
9
not connected
C
GND1 GND2
Fig.1 Block diagram.
July 1994 3
power stage
m
10
output 3
power stage
MEA865 - 1
power ground (substrate)
Philips Semiconductors Product specification
4 x 12 W single-ended car radio power amplifier with
dynamic distortion detector and diagnostic interface
PINNING
SYMBOL PIN DESCRIPTION
IN 1 1 input 1
GND(S) 2 signal ground
IN 2 3 input 2
RR 4 supply voltage ripple rejection
V
P1
5 supply voltage
OUT 1 6 output 1
GND1 7 power ground 1
OUT 2 8 output 2
n.c. 9 not connected
OUT 3 10 output 3
GND2 11 power ground 2
OUT 4 12 output 4
V
P2
13 supply voltage
MODE 14 mode select switch input
IN 3 15 input 3
V
DIAG
16 diagnostic output
IN 4 17 input 4
The device is primarily developed for car radio
applications.
FUNCTIONAL DESCRIPTION
The TDA8562Q contains four identical amplifiers and can
be used for single-ended applications. The gain of each
amplifier is fixed at 20 dB. Special features of the device
are:
Mode select switch (pin 14)
• low stand-by 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 pin 1, 3, 15 and pin 17).
handbook, halfpage
Diagnostic output (pin 16)
DYNAMIC 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 Fig.3).
IN 1
1
GND(S)
OUTP 2
OUTP 4
V
IN 2
RR
V
P1
OUT 1
GND1
n.c.
OUT 3
GND2
V
P2
MODE
IN 3
DIAG
IN 4
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
TDA8562Q
MEA866 - 1
Fig.2 Pin configuration.
TDA8562Q
This can be achieved by:
• microprocessor control
• external timing circuit (see Fig.7)
July 1994 4
Philips Semiconductors Product specification
4 x 12 W single-ended car radio power amplifier with
dynamic distortion detector and diagnostic interface
SHORT-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 more
channels occurs the output stages are switched off during
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 50µs/20 ms the average
current consumption during this short-circuit condition is
very low (approximately 40 mA).
During this short-circuit condition, pin 16 is low for 20 ms
and high for 50 µs (see Fig.4).
The power dissipation in any short-circuit condition is very
low.
handbook, halfpage
Fig.3 Distortion detector waveform.
TDA8562Q
V
O
0
V
16
V
P
0
MGA706
t
TEMPERATURE DETECTION
When the virtual junction temperature Tvj reaches 150 °C,
pin 16 will be active LOW.
handbook, full pagewidth
current
in
output
stage
V
15
short-circuit over the load
V
P
OPEN COLLECTOR OUTPUT
Pin 16 is an open collector output, which allows pin 16 of
more devices being tied together.
MGA707
t
20 ms
t
50 µs
Fig.4 Short-circuit waveform.
July 1994 5
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