SGS Thomson Microelectronics TDA7231A Datasheet
.
OPERATINGVOLTAGE1.8 TO 15 V
.
LOW QUIESCENTCURRENT
.
HIGH POWERCAPABILITY
.
LOW CROSSOVERDISTORTION
.
SOFT CLIPPING
TDA7231A
1.6WAUDIOAMPLIFIER
MINIDIP (4+4)
DESCRIPTION
TheTDA7231Aisa monolithicintegrated 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 recordersand players, etc.
PIN CONNECTION
ORDERING NUMBER : TDA7231A
March 1995
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TDA7231A
ABSOLUTE MAXIMUM RATINGS
Symbol Parameter Value Unit
V
s
P
tot
I
o
T
stg,Tj
THERMALDATA
Symbol Parameter Value Unit
R
th j-amb
R
th j-pins
Supply Voltage 16 V
Total Power Dissipation at T
at T
amb
case
=50°C
=70°C
1.25
4
Output Peak Current 1 A
Storage and Junction Temperature – 40 to 150 °C
Thermal Resistance Junction-ambient Max. 80 °C/W
Thermal Resistance Junction-pins Max. 15 °C/W
W
W
ELECTRICALCHARACTERISTICS (Vs= 6V,T
= 25 °C, unless otherwisespecified)
amb
Symbol Parameter Test Conditions Min. Typ. Max. Unit
V
s
V
o
I
d
I
b
P
o
d Distortion P
G
v
R
in
e
N
SVR Supply Voltage Rejection f = 100Hz, R
Supply Voltage 1.8 15 V
Quiescent Out Voltage VS=6V
=3V
V
S
2.7
1.2
Quiescent Drain Current 3.6 9 mA
Input Bias Current 100 nA
Output Power d = 10% f = 1kHz
= 12V RL=8Ω
V
s
=9V RL=4Ω
V
s
=6V RL=8Ω
V
s
=6V RL=4Ω
V
s
=3V RL=4Ω
V
s
=3V RL=8Ω
V
s
= 0.2 W
o
f = 1 kHz
=8Ω
R
L
1.8
1.6
0.4
0.7
110
70
0.3 %
Closed Loop Voltage Gain 38 dB
Input Resistance f = 1kHz 100 kΩ
Total Input Noise Rs= 10kΩ B = Curve A
B = 22Hz to 22kHz
= 10kΩ 24 33 dB
g
2
3
Figure1 : Testand ApplicationCircuit
V
V
W
W
W
W
mW
mW
µV
µV
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