tda8561, Ham- CB Radio, Karty katalogowe
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INTEGRATED CIRCUITS
DATA SHEET
12 W
single-ended car radio power
amplifier
´
Product specification
Supersedes data of July 1994
File under Integrated Circuits, IC01
1997 Sep 22
TDA8561Q
2
´
24 W BTL or 4
Philips Semiconductors
Product specification
12 W single-ended
car radio power amplifier
´
24 W BTL or 4
´
TDA8561Q
FEATURES
·
Reverse polarity safe
·
Requires very few external components
·
Electrostatic discharge protection
·
High output power
·
No switch-on/switch-off plop
·
Flexibility in use; Quad single-ended or stereo BTL
·
Flexible leads
·
Low output offset voltage
·
Low thermal resistance
·
Fixed gain
·
Identical inputs (inverting and non-inverting).
·
Diagnostic facility (distortion, short-circuit and
temperature detection)
GENERAL DESCRIPTION
·
Good ripple rejection
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.
·
Mode select switch (operating, mute and standby)
·
Load dump protection
·
AC and DC short-circuit safe to ground and to V
P
The device is primarily developed for car radio
applications.
·
Low power dissipation in any short-circuit condition
·
Thermally protected
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
standby current
-
0.1
100
m
A
Stereo BTL application
P
o
output power
R
L
=4
W
; THD = 10%
-
24
-
W
RR
supply voltage ripple rejection
48
-
-
dB
V
no
noise output voltage
R
s
=0
W
-
70
-
m
V
ï
Z
I
ï
input impedance
25
-
-
k
W
ïD
V
O
|
ï
DC output offset voltage
-
-
150
mV
Quad single-ended application
P
o
output power
THD = 10%
R
L
=4
W
-
7
-
W
R
L
=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
TYPE
NUMBER
PACKAGE
NAME
DESCRIPTION
VERSION
TDA8561Q
DBS17P
plastic DIL-bent-SIL power package;
17 leads (lead length 12 mm)
SOT243-1
1997 Sep 22
2
2
Philips Semiconductors
Product specification
12 W single-ended
car radio power amplifier
´
24 W BTL or 4
´
TDA8561Q
BLOCK DIAGRAM
V
P1
V
P2
5
13
non-inverting
input 1
1
mute switch
C
m
60
k
W
TDA8561Q
VA
6
output 1
2
k
W
18 k
W
power stage
mute switch
C
m
60
k
inverting
input 2
3
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
non-inverting
input 4
mute switch
C
m
60
k
W
VA
12
output 4
2
k
W
18 k
W
power stage
mute switch
C
m
60
k
inverting
input 3
15
10
VA
output 3
2
k
input
reference
voltage
18 k
W
power stage
2
9
7
11
GND1
GND2
MEA858 - 1
ground
(signal)
not connected
power ground (substrate)
Fig.1 Block diagram.
1997 Sep 22
3
2
W
W
W
W
Philips Semiconductors
Product specification
12 W single-ended car
radio power amplifier
´
24 W BTL or 4
´
TDA8561Q
PINNING
SYMBOL PIN
DESCRIPTION
-
INV 1
1
non-inverting input 1
GND(S)
2
signal ground
INV 1
1
INV 2
3
inverting input 2
GND(S)
2
RR
4
supply voltage ripple rejection
INV 2
3
V
P1
5
supply voltage
RR
4
OUT 1
6
output 1
V
P1
5
GND1
7
power ground 1
OUT 2
8
output 2
OUT 1
6
n.c.
9
not connected
GND1
7
OUT 3
10 output 3
OUT 2
8
GND2
11 power ground 2
n.c.
9
TDA8561Q
OUT 4
12 output 4
OUT 3
10
V
P2
13 supply voltage
GND2
11
MODE
14 mode select switch input
OUT 4
12
INV 3
15 inverting input 3
V
DIAG
16 diagnostic output
V
P2
13
-
INV 4
17 non-inverting input 4
MODE
14
INV 3
15
V
DIAG
16
INV 4
17
MEA859 - 1
Fig.2 Pin configuration.
1997 Sep 22
4
2
Philips Semiconductors
Product specification
12 W single-ended car
radio power amplifier
´
24 W BTL or 4
´
TDA8561Q
FUNCTIONAL DESCRIPTION
During this short-circuit condition, pin 16 is LOW for 20 ms
and HIGH for 50
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:
m
s (see Fig.5).
The power dissipation in any short-circuit condition is very
low.
Mode select switch (pin 14)
·
Low standby 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
handbook, halfpage
V
O
MGA705
0
100 ms (charging of the input
capacitors at pins 1, 3, 15 and 17). This can be achieved
by:
·
³
V
16
Microcontroller control
V
P
·
External timing circuit (see Fig.11).
0
t
Diagnostic output (pin 16)
D
YNAMIC
D
ISTORTION
D
ETECTOR
(DDD)
Fig.3 Distortion detector waveform; BTL
application.
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.
handbook, halfpage
V
O
MGA706
0
V
16
V
P
0
t
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
s to see whether the short-circuit is still
present. Due to this duty cycle of 50
m
Fig.4 Distortion detector waveform; single-ended
application.
s/20 ms the average
current consumption during this short-circuit condition is
very low (approximately 40 mA).
m
1997 Sep 22
5
2
·
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