OPERATINGVOLTAGE1.8 TO24V
LOW QUIESCENTCURRENT
HIGHPOWERCAPABILITY
LOW CROSSOVERDISTORTION
SOFTCLIPPING
DESCRIPTION
The TDA7235 is a monolithic integrated circuit in
4 +4 lead Minidip package, intended for use as
class AB power amplifier with wide range of supply voltage in portable radios, cassette recorders
and players,TV sets, etc..
TEST AND APPLICATIONCIRCUIT
TDA7235
1.6W AUDIO AMPLIFIER
Minidip (4 +4)
May 1997
1/5
TDA7235
ABSOLUTE MAXIMUM RATINGS
Symbol Parameter Value Unit
V
P
T
stg,Tj
S
I
O
tot
Supply Voltage 28 V
Output Peak Current 1 A
Total Power Dissipation T
T
amb
case
=50°C
=70°C
1.25
4
Storage and Junction Temperature -40 to150 °C
W
W
PIN CONNECTION
(Top view)
THERMAL DATA
Symbol Description Value Unit
2/5
R
th j-amb
R
th j-case
Thermal ResistanceJunction-ambient max.
Thermal ResistanceJunction-pins max.
80
15
C/W
°
°C/W
TDA7235
ELECTRICALCHARACTERISTICS
(V
S
= 12V, T
=25°C, f = 1KHz, unless otherwise specified.)
amb
Symbol Parameter Test Condition 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 24 V
Quiescent Output Voltage VS=9V
V
= 12V
S
4
5.5
Quiescent Drain Current 4 10 mA
Input Bias Current
Output Power d = 10%
V
=9V RL=4Ω
S
V
= 12V RL=8Ω
S
V
= 15V RL=16Ω
S
V
= 20V RL=32
S
= 0.5W RL=8Ω 0.3 1 %
O
Ω
1.6
1.8
1.8
1.6
Closed Loop Voltage Gain 38 dB
Input Resistance 100 KΩ
Total Input Noise RS= 10KΩ
b = Curve A
B = 22Hz to 22KHz
= 10KΩ 24 33 dB
g
2
3
V
V
W
W
W
W
µV
µ
V
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TDA7235
MINIDIP PACKAGEMECHANICAL DATA
DIM.
MIN. TYP. MAX. MIN. TYP. MAX.
A 3.32 0.131
a1 0.51 0.020
B 1.15 1.65 0.045 0.065
b 0.356 0.55 0.014 0.022
b1 0.204 0.304 0.008 0.012
D 10.92 0.430
E 7.95 9.75 0.313 0.384
e 2.54 0.100
e3 7.62 0.300
e4 7.62 0.300
F 6.6 0.260
I 5.08 0.200
L 3.18 3.81 0.125 0.150
Z 1.52 0.060
mm inch
4/5
TDA7235
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 patentrights of SGS-THOMSON Microelectronics. Specification mentioned
in this publication are subject to change without notice. This publication supersedes and replaces all information previously supplied. SGSTHOMSON Microelectronics products are not authorized for use as critical components in life support devices or systems without express
written approval of SGS-THOMSON Microelectronics.
1997 SGS-THOMSON Microelectronics – Printedin Italy – All Rights Reserved
SGS-THOMSON Microelectronics GROUP OF COMPANIES
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