TDA7231A
1.6W AUDIO AMPLIFIER
March 1995
PIN CONNECTION
MINIDIP (4+4)
ORDERING NUMBER : TDA7231A
.
OPERATING VOLTAGE 1.8 TO 15 V
.
LOW QUIESCENT CURRENT
.
HIGH POWER CAPABILITY
.
LOW CROSSOVER DISTORTION
.
SOFT CLIPPING
DESCRIPTION
The TDA7231A is a monolithic integrated circuit in
4 + 4 lead minidip package. It is intended for use
as class AB power amplifier with wide range of
supply voltage in portable radios, cassette re-
corders and players, etc.
1/5
ABSOLUTE MAXIMUM RATINGS
Symbol
Parameter
Value
Unit
V
s
Supply Voltage
16
V
P
tot
Total Power Dissipation at T
amb
= 50
C
at T
case
= 70
C
1.25
4
W
W
I
o
Output Peak Current
1
A
T
stg
, T
j
Storage and Junction Temperature
40 to 150
C
THERMAL DATA
Symbol
Parameter
Value
Unit
R
th j-amb
Thermal Resistance Junction-ambient
Max.
80
C/W
R
th j-pins
Thermal Resistance Junction-pins
Max.
15
C/W
ELECTRICAL CHARACTERISTICS (V
s
= 6 V, T
amb
= 25
C, unless otherwise specified)
Symbol
Parameter
Test Conditions
Min.
Typ.
Max.
Unit
V
s
Supply Voltage
1.8
15
V
V
o
Quiescent Out Voltage
V
S
= 6 V
V
S
= 3 V
2.7
1.2
V
V
I
d
Quiescent Drain Current
3.6
9
mA
I
b
Input Bias Current
100
nA
P
o
Output Power
d = 10%
f = 1kHz
V
s
= 12V
R
L
= 8
V
s
= 9V
R
L
= 4
V
s
= 6V
R
L
= 8
V
s
= 6V
R
L
= 4
V
s
= 3V
R
L
= 4
V
s
= 3V
R
L
= 8
1.8
1.6
0.4
0.7
110
70
W
W
W
W
mW
mW
d
Distortion
P
o
= 0.2 W
f = 1 kHz
R
L
= 8
0.3
%
G
v
Closed Loop Voltage Gain
38
dB
R
in
Input Resistance
f = 1kHz
100
k
e
N
Total Input Noise
R
s
= 10k
B = Curve A
B = 22Hz to 22kHz
2
3
V
V
SVR
Supply Voltage Rejection
f = 100Hz, R
g
= 10k
24
33
dB
Figure 1 : Test and Application Circuit
TDA7231A
2/5
Figure 2 : P.C. Board and Components Layout of the figure 1 (1:1 scale)
Figure 3 : Output Power versus Supply Voltage
Figure 5 : Quiescent Output Voltage versus
Supply Voltage
Figure 4 : Quiescent Current versus
Supply Voltage
Figure 6 : Supply Voltage Rejection versus
Frequency
TDA7231A
3/5
MINIDIP PACKAGE MECHANICAL DATA
DIM.
mm
inch
MIN.
TYP.
MAX.
MIN.
TYP.
MAX.
A
3.3
0.130
a1
0.7
0.028
B
1.39
1.65
0.055
0.065
B1
0.91
1.04
0.036
0.041
b
0.5
0.020
b1
0.38
0.5
0.015
0.020
D
9.8
0.386
E
8.8
0.346
e
2.54
0.100
e3
7.62
0.300
e4
7.62
0.300
F
7.1
0.280
I
4.8
0.189
L
3.3
0.130
Z
0.44
1.6
0.017
0.063
TDA7231A
4/5
Information furnished is believed to be accurate and reliable. However, SGS-THOMSON Microelectronics assumes no responsibility for the
consequences of use of such information nor for any infringement of patents or other rights of third parties which may result from its use. No
license is granted by implication or otherwise under any patent or patent rights of SGS-THOMSON Microelectronics. Specifications mentioned
in this publication are subject to change without notice. This publication supersedes and replaces all information previously supplied.
SGS-THOMSON Microelectronics products are not authorized for use as critical components in life support devices or systems without express
written approval of SGS-THOMSON Microelectronics.
1995 SGS-THOMSON Microelectronics - All Rights Reserved
SGS-THOMSON Microelectronics GROUP OF COMPANIES
Australia - Brazil - France - Germany - Hong Kong - Italy - Japan - Korea - Malaysia - Malta - Morocco - The Netherlands - Singa-
pore - Spain - Sweden - Switzerland - Taiwan - Thaliand - United Kingdom - U.S.A.
TDA7231A
5/5
PDF 
ZIP