tda1557q_cnv_2.pdf

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2 x 22 W BTL stereo car radio power amplifier with speaker protection
INTEGRATED CIRCUITS
DATA SHEET
TDA1557Q
2 x 22 W BTL stereo car radio
power amplifier with speaker
protection
Product specication
File under Integrated Circuits, IC01
May 1992
11045878.015.png
Philips Semiconductors
Product specication
2 x 22 W BTL stereo car radio power
amplier with speaker protection
TDA1557Q
FEATURES
·
Protected against electrostatic discharge
·
Requires very few external components
·
No switch-on/switch-off plop
·
High output power
·
Flexible leads
·
Low offset voltage at output
·
Low thermal resistance.
·
Fixed gain
·
Good ripple rejection
GENERAL DESCRIPTION
The TDA1557Q is a monolithic integrated class-B output
amplifier in a 13-lead single-in-line (SIL) plastic power
package. The device contains 2
·
Mute/stand-by switch
·
Load dump protection
22 W amplifiers in BTL
configuration and has been primarily developed for car
radio applications.
´
·
AC and DC short-circuit-safe to ground and V P
·
Thermally protected
·
Reverse polarity safe
·
Capability to handle high energy on outputs (V P = 0)
QUICK REFERENCE DATA
SYMBOL
PARAMETER
CONDITIONS
MIN. TYP. MAX. UNIT
V P
positive supply voltage range
operating
6.0
14.4
18
V
non-operating
-
-
30
V
load dump
-
-
45
V
IORM
repetitive peak output current
-
-
4
A
I tot
total quiescent current
-
80
-
mA
I sb
stand-by current
-
0.1
100
m
A
I sw
switch-on current
-
-
60
m A
ï
Z I ï
input impedance
25
-
-
k
W
T XTAL
crystal temperature
-
-
+
150
°
C
Stereo application
P O
output power
THD = 10%; 4
W
-
22
-
W
SVRR
supply voltage ripple rejection
R S = 0; f = 100 Hz to 10 kHz
45
-
-
dB
ïD
V O ï
DC output offset voltage
-
-
250
mV
a
channel separation
40
-
-
dB
ïD G v ï
channel unbalance
-
-
1
dB
G v
closed loop voltage gain
45
46
47
dB
ORDERING INFORMATION
EXTENDED TYPE
NUMBER
PACKAGE
PINS
PIN POSITION
MATERIAL
CODE
TDA1557Q
13
DIL
plastic
SOT141R
Note
1. SOT141-6; 1996 August 23.
May 1992
2
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Philips Semiconductors
Product specication
2 x 22 W BTL stereo car radio power
amplier with speaker protection
TDA1557Q
handbook, full pagewidth
POWER
STAGE
3
10
V P
mute switch
1
CM
input 1
VA
4
output 1A
3 0 k
½
1 83
½
18.1 k
½
POWER
STAGE
mute switch
CM
VA
6
output 1B
1 83 ½
18.1 k
½
TDA1557Q
V P
11
stand-by
switch
mute/stand-by
input
reference
voltage
12
stand-by
reference
voltage
VA
15 k
½
mute
switch
x1
loudspeaker
protection
15 k
½
mute
reference
voltage
POWER
STAGE
mute switch
13
CM
input 2
VA
9
output 2B
3 0 k
½
183
½
1 8 .1 k ½
POWER
STAGE
mute switch
CM
input
reference
voltage
VA
7
output 2A
183
½
1 8 .1 k
½
2
5
8
MCD324 - 1
signal ground
power ground
Fig.1 Block diagram.
May 1992
3
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Philips Semiconductors
Product specication
2 x 22 W BTL stereo car radio power
amplier with speaker protection
TDA1557Q
PINNING
FUNCTIONAL DESCRIPTION
SYMBOL
PIN
DESCRIPTION
The TDA1557Q contains two identical amplifiers with
differential input stages, and can be used for bridge
applications. The gain of each amplifier is fixed at 46 dB.
Special features of this device are:
INP1
1
input 1
GND1
2
ground (signal)
V P1
3
supply voltage 1
a. mute/stand-by switch
low stand-by current
low mute/stand-by switching current (low cost supply
switch)
mute facility
b. loudspeaker protection
when a short circuit to ground is made, which forces a
DC voltage of
OUT1A
4
output 1A
GND
5
power ground 1
OUT1B
6
output 1B
OUT2A
7
output 2A
GND
8
power ground 2
OUT2B
9
output 2B
V P2
10
supply voltage 2
1 V across the loudspeaker, a built-in
protection circuit becomes active and limits the DC
voltage across the loudspeaker to
M/SS
11
mute/stand-by switch
V ref
12
input reference voltage
£
1 V
INP2
13
input 2
c. the harmonic distortion at low frequencies can be
decreased by connecting two diodes to ground at pin 12.
handbook, halfpage
INP1
1
GND1
2
V
P1
3
OUT1A
4
GND
5
OUT1B
6
OUT2A
7
TDA1557Q
GND
8
OUT2B
9
V
P2
10
M / SS
11
V
ref
12
INP2
13
MCD322 - 1
Fig.2 Pin configuration.
May 1992
4
³
11045878.011.png 11045878.012.png
Philips Semiconductors
Product specication
2 x 22 W BTL stereo car radio power
amplier with speaker protection
TDA1557Q
LIMITING VALUES
In accordance with the Absolute maximum System (IEC 134).
SYMBOL
PARAMETER
CONDITIONS
MIN.
MAX. UNIT
V P
positive supply voltage
operating
-
18
V
non-operating
-
30
V
load dump protected; during
-
45
V
50 ms; rise time
³
2.5 ms
V PSC
AC and DC short-circuit safe voltage
-
18
V
V PR
reverse polarity
-
6.0
V
energy handling capability at outputs
V P = 0
-
200
mJ
IOSM
non-repetitive peak output current
-
6
A
IORM
repetitive peak output current
-
4
A
P tot
total power dissipation
-
60
W
T stg
storage temperature range
-
55
+
150
°
C
T j
junction temperature
-
+
150
°
C
THERMAL RESISTANCE
SYMBOL
PARAMETER
THERMAL RESISTANCE
R th vj-a
from virtual junction to ambient in free air
40 K/W
R th vj-c
from virtual junction to case (see Fig.3)
1.5 K/W
handbook, halfpage
output 1
output 2
virtual
junction
2.8
K/W
2.8
K/W
0.1
K/W
case
MLA382
Fig.3 Equivalent thermal resistance network.
May 1992
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