tda8562q, Ham- CB Radio, Karty katalogowe
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INTEGRATED CIRCUITS
DATA SHEET
TDA8562Q
4 x 12 W single-ended car radio
power amplifier with dynamic
distortion detector and diagnostic
interface
Product specication
File under Integrated Circuits, IC01
July 1994
Philips Semiconductors
Product specication
4 x 12 W single-ended car radio power amplier with
dynamic distortion detector and diagnostic interface
TDA8562Q
FEATURES
·
Thermally protected
·
Requires very few external components
·
Reverse polarity safe
·
High output power
·
Electrostatic discharge protection
·
Fixed gain
·
No switch-on/switch-off plop
·
Diagnostic facility (distortion, short-circuit and
temperature detection)
·
Flexible leads
·
Low thermal resistance
·
Good ripple rejection
·
Identical inputs.
·
Mode select switch (operating, mute and stand-by)
·
Load dump protection
GENERAL DESCRIPTION
The TDA8562Q is an integrated class-B output amplifier in
a 17-lead single-in-line (SIL) power package. It contains
4
·
AC and DC short-circuit safe to ground and to V
P
·
Low power dissipation in any short-circuit condition
´
12 W single-ended amplifiers.
QUICK REFERENCE DATA
SYMBOL
PARAMETER
CONDITIONS
MIN. TYP. MAX. UNIT
V
P
positive operating supply voltage
6
14.4
18
V
I
ORM
repetitive peak output current
-
-
4
A
I
P
total quiescent current
-
80
-
mA
I
sb
stand-by current
-
0.1
100
m
A
P
o
output power
THD = 10%
4
W
-
7
-
W
2
W
-
12
-
W
RR
supply voltage ripple rejection
48
-
-
dB
V
no
noise output voltage
R
s
= 0
W
-
50
-
m
V
ï
Z
I
ï
input impedance
50
-
-
k
W
ORDERING INFORMATION
PACKAGE
EXTENDED TYPE NUMBER
PINS
PIN POSITION
MATERIAL
CODE
TDA8562Q
(1)
17
DBS
plastic
SOT243R
Note
1. SOT243-1; 1996 August 21.
July 1994
2
Philips Semiconductors
Product specication
4 x 12 W single-ended car radio power amplier with
dynamic distortion detector and diagnostic interface
TDA8562Q
V
P1
V
P2
handbook, full pagewidth
5
13
input 1
1
mute switch
C
m
60
k
W
TDA8562Q
VA
6
output 1
2
k
18 k
W
power stage
mute switch
C
m
60
k
W
3
input 2
VA
8
output 2
2
k
18 k
W
power stage
V
P
14
mode
select
switch
stand-by
switch
stand-by
reference
voltage
VA
PROTECTIONS
thermal
short-circuit
15 k
W
mute
switch
x1
16
diagnostic
output
supply voltage
ripple rejection
4
15 k
W
17
mute
reference
voltage
input 4
mute switch
C
m
60
k
W
VA
12
output 4
2
k
W
1
8 k
W
power stage
mute switch
C
m
60
k
W
15
input 3
10
VA
output 3
2
k
input
reference
voltage
18 k
W
power stage
2
9
7
11
GND1
GND2
MEA865 - 1
ground
(signal)
not connected
power ground (substrate)
Fig.1 Block diagram.
July 1994
3
W
W
W
Philips Semiconductors
Product specication
4 x 12 W single-ended car radio power amplier with
dynamic distortion detector and diagnostic interface
TDA8562Q
PINNING
SYMBOL
PIN
DESCRIPTION
IN 1
1 input 1
handbook, halfpage
IN 1
1
GND(S)
2 signal ground
GND(S)
2
IN 2
3 input 2
IN 2
3
RR
4 supply voltage ripple rejection
RR
4
V
P1
5 supply voltage
V
P1
5
OUT 1
6 output 1
GND1
7 power ground 1
OUT 1
6
OUT 2
8 output 2
GND1
7
n.c.
9 not connected
OUTP 2
8
OUT 3
10 output 3
n.c.
9
TDA8562Q
GND2
11 power ground 2
OUT 3
10
OUT 4
12 output 4
11
GND2
V
P2
13 supply voltage
OUTP 4
12
MODE
14 mode select switch input
IN 3
15 input 3
V
P2
13
V
DIAG
16 diagnostic output
MODE
14
IN 4
17 input 4
IN 3
15
V
DIAG
16
The device is primarily developed for car radio
applications.
IN 4
17
MEA866 - 1
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:
Fig.2 Pin configuration.
Diagnostic output (pin 16)
Mode select switch (pin 14)
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).
·
low stand-by current (< 100
m
A)
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).
³
This can be achieved by:
·
microprocessor control
·
external timing circuit (see Fig.7)
July 1994
4
·
Philips Semiconductors
Product specication
4 x 12 W single-ended car radio power amplier with
dynamic distortion detector and diagnostic interface
TDA8562Q
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
handbook, halfpage
V
O
MGA706
0
s to see whether the short-circuit is still
present. Due to this duty cycle of 50
m
s/20 ms the average
current consumption during this short-circuit condition is
very low (approximately 40 mA).
m
V
16
V
P
0
t
During this short-circuit condition, pin 16 is low for 20 ms
and high for 50
m
s (see Fig.4).
The power dissipation in any short-circuit condition is very
low.
Fig.3 Distortion detector waveform.
TEMPERATURE DETECTION
OPEN COLLECTOR OUTPUT
When the virtual junction temperature T
vj
reaches 150
°
C,
Pin 16 is an open collector output, which allows pin 16 of
more devices being tied together.
pin 16 will be active LOW.
handbook, full pagewidth
current
in
output
stage
MGA707
t
short-circuit over the load
V
15
20 ms
V
P
t
50
m
s
Fig.4 Short-circuit waveform.
July 1994
5
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