TDA7231A
®
1.6W AUDIO AMPLIFIER
..
..
.
OPERATING VOLTAGE 1.8 TO 15 V
LOW QUIESCENT CURRENT
HIGH POWER CAPABILITY
LOW CROSSOVER DISTORTION
SOFT CLIPPING
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MINIDIP (4+4)
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ORDERING NUMBER : TDA7231A
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 recorders and
players, etc.
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PIN CONNECTION
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September 2003
1/5
TDA7231A
ABSOLUTE MAXIMUM RATINGS
Symbol
Parameter
Vs
Supply Voltage
Ptot
Total Power Dissipation at Tamb = 50 °C
at Tcase = 70 °C
Io
Value
Output Peak Current
Tstg, Tj
Storage and Junction Temperature
Unit
16
V
1.25
4
W
W
1
A
– 40 to 150
°C
THERMAL DATA
Symbol
Value
Unit
Rth j-amb
Thermal Resistance Junction-ambient
Parameter
Max.
80
°C/W
Rth j-pins
Thermal Resistance Junction-pins
Max.
15
°C/W
ELECTRICAL CHARACTERISTICS (Vs = 6 V, Tamb = 25 °C, unless otherwise specified)
Symbol
Parameter
Vs
Supply Voltage
Vo
Quiescent Out Voltage
Id
Quiescent Drain Current
Ib
Input Bias Current
Po
Output Power
d
Test Conditions
VS = 6 V
VS = 3 V
d = 10%
Vs = 12V
Vs = 9V
Vs = 6V
Vs = 6V
Vs = 3V
Vs = 3V
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Rin
Input Resistance
eN
Total Input Noise
du
Figure 1 : Test and Application Circuit
2/5
f = 1kHz
RL = 8Ω
RL = 4Ω
RL = 8Ω
RL = 4Ω
RL = 4Ω
RL = 8Ω
P
e
let
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Rs = 10kΩ
15
V
9
V
V
mA
nA
1.8
1.6
0.4
0.7
110
70
W
W
W
W
mW
mW
0.3
%
100
B = Curve A
B = 22Hz to 22kHz
Unit
100
38
f = 1kHz
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Max.
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Po = 0.2 W
f = 1 kHz
RL = 8 Ω
Closed Loop Voltage Gain
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2.7
1.2
3.6
Gv
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Typ.
1.8
Distortion
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Min.
dB
kΩ
2
3
µV
µV
TDA7231A
Figure 2 : P.C. Board and Components Layout of the figure 1 (1:1 scale)
Figure 3 : Output Power versus Supply Voltage
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Figure 4 : Quiescent Current versus
Supply Voltage
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Figure 5 : Quiescent Output Voltage versus
Supply Voltage
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Figure 6 : Supply Voltage Rejection versus
Frequency
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TDA7231A
mm
DIM.
MIN.
TYP.
A
inch
MAX.
MIN.
3.3
TYP.
0.130
a1
0.7
B
1.39
1.65
0.055
0.065
B1
0.91
1.04
0.036
0.041
0.028
b
0.5
b1
0.38
0.020
0.5
D
0.015
0.020
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
Z
0.44
1.6
0.017
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4/5
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PowerMinidip
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0.063
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0.130
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OUTLINE AND
MECHANICAL DATA
MAX.
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TDA7231A
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Information furnished is believed to be accurate and reliable. However, STMicroelectronics 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 STMicroelectronics. Specifications mentioned in this publication are subject to
change without notice. This publication supersedes and replaces all information previously supplied. STMicroelectronics products are not
authorized for use as critical components in life support devices or systems without express written approval of STMicroelectronics.
The ST logo is a registered trademark of STMicroelectronics.
All other names are the property of their respective owners
© 2003 STMicroelectronics - All rights reserved
STMicroelectronics GROUP OF COMPANIES
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