tda8565q, Ham- CB Radio, Karty katalogowe
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INTEGRATED CIRCUITS
DATA SHEET
12 W single-ended car radio
power amplifier with diagnostic
interface
Product specification
Supersedes data of November 1994
File under Integrated Circuits, IC01
1995 Dec 08
TDA8565Q
4
´
Philips Semiconductors
Product specification
12 W single-ended car radio
power amplifier with diagnostic interface
´
TDA8565Q
FEATURES
GENERAL DESCRIPTION
·
Requires very few external components
The TDA8565Q is an integrated class-B output amplifier in
a 17-lead DIL-bent-to-SIL power package. It contains
4
·
High output power
´
12 W single-ended amplifiers.
·
Fixed gain
·
Diagnostic facility (distortion, short-circuit and
temperature detection)
APPLICATIONS
·
Good ripple rejection
·
The device is primarily developed for car radio
applications.
·
Mode select switch (operating, mute and standby)
·
Load dump protection
·
AC and DC short-circuit safe to ground and to V
P
·
Low power dissipation in any short-circuit condition
·
Thermally protected
·
Reverse polarity safe
·
Electrostatic discharge protection
·
No switch-on/switch-off plop
·
Flexible leads
·
Low thermal resistance
·
Identical inputs.
QUICK REFERENCE DATA
SYMBOL
PARAMETER
CONDITIONS
MIN. TYP. MAX. UNIT
V
P
operating supply voltage
6.0
14.4
18.0
V
I
ORM
repetitive peak output current
-
-
4
A
I
q(tot)
total quiescent current
-
88
-
mA
I
sb
standby current
-
0.1
100
m
A
ï
Z
I
ï
input impedance
50
-
-
k
W
P
o
output power
R
L
=4
W
; THD = 10%
-
6.4
-
W
R
L
=2
W
; THD = 10%
-
12
-
W
SVRR
supply voltage ripple rejection
-
41
-
dB
V
no
noise output voltage
R
s
=0
W
-
200
-
m
V
ORDERING INFORMATION
TYPE
NUMBER
PACKAGE
NAME
DESCRIPTION
VERSION
TDA8565Q
DBS17P plastic DIL-bent-SIL power package; 17 leads (lead length 12 mm)
SOT243-1
1995 Dec 08
2
4
Philips Semiconductors
Product specification
12 W single-ended car radio
power amplifier with diagnostic interface
´
TDA8565Q
BLOCK DIAGRAM
V
P1
V
P2
handbook, full pagewidth
5
13
input 1
1
mute switch
C
m
60
k
TDA8565Q
VA
6
output 1
180
W
18 k
W
power stage
mute switch
C
m
180
W
3
input 2
8
VA
output 2
180
W
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
180
W
18 k
W
power stage
mute switch
C
m
60
k
15
input 3
10
VA
output 3
180
W
input
reference
voltage
18 k
W
power stage
2
9
7
11
GND1
GND2
MLC392
ground
(signal)
not connected
power ground (substrate)
Fig.1 Block diagram.
1995 Dec 08
3
4
W
W
Philips Semiconductors
Product specification
12 W single-ended car radio
power amplifier with diagnostic interface
´
TDA8565Q
PINNING
SYMBOL
PIN
DESCRIPTION
IN1
1
input 1
dbook, halfpage
IN1
1
SGND
2
signal ground
SGND
2
IN2
3
input 2
IN2
3
SVRR
4
supply voltage ripple rejection
SVRR
4
V
P1
5
supply voltage 1
OUT1
6
output 1
V
P1
5
GND1
7
power ground 1
OUT1
6
OUT2
8
output 2
GND1
7
n.c.
9
not connected
OUTP2
8
OUT3
10
output 3
n.c.
9
TDA8565Q
GND2
11
power ground 2
OUT3
10
OUT4
12
output 4
V
P2
13
supply voltage 2
GND2
11
MODE
14
mode select switch input
OUTP4
12
IN3
15
input 3
V
P2
13
V
DIAG
16
diagnostic output
MODE
14
IN4
17
input 4
IN3
15
V
DIAG
16
FUNCTIONAL DESCRIPTION
IN4
17
The TDA8565Q contains four identical amplifiers which
can be used for single-ended applications. The gain of
each amplifier is fixed at 40 dB. Special features of the
device are as follows.
MLC393
Fig.2 Pin configuration.
Mode select switch (pin 14)
·
Low standby current (<100
m
A)
·
Low switching current (low cost supply switch)
handbook, halfpage
V
P
·
Mute facility.
To avoid switch-on plops, it is advised to keep the amplifier
in the mute mode during
³
100 ms (charging of the input
capacitors at pins 1, 3, 15 and 17).
10 k
W
100
W
This can be achieved by:
·
Microcontroller control
47
m
F
mode
select
switch
100 k
W
·
External timing circuit (see Fig.3).
The circuit in Fig.3 slowly ramps up the voltage at the
mode select switch pin when switching on and results in
fast muting when switching off.
MGA708
In the event of fast switching at mode select pin it is
advised to increase the
1
¤
2
V
P
decoupling capacitor (pin 4)
Fig.3 Mode select switch circuitry.
to 150
m
F to avoid switch plops.
1995 Dec 08
4
4
Philips Semiconductors
Product specification
12 W single-ended car radio
power amplifier with diagnostic interface
´
TDA8565Q
Diagnostic output (pin 16)
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 Fig.4).
handbook, halfpage
V
O
MGA706
0
S
HORT
-
CIRCUIT PROTECTION
V
16
V
P
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
0
t
Fig.4 Distortion detector waveform.
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
T
EMPERATURE DETECTION
When the virtual junction temperature T
vj
reaches 150
°
C,
pin 16 will be active LOW.
During this short-circuit condition, pin 16 is LOW for 20 ms
and HIGH for 50
m
s (see Fig.5).
The power dissipation in any short-circuit condition is
very low.
O
PEN COLLECTOR OUTPUT
Pin 16 is an open-collector output, which allows pin 16 of
more devices being tied together.
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.5 Short-circuit waveform.
1995 Dec 08
5
4
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