TDA7262
20+20W STEREO AMPLIFIER WITH STAND-BY
WIDE SUPPLY VOLTAGE RANGE
HIGH OUTPUT POWER
28+28W TYP. MUSIC POWER
20+20W @ THD = 10%, R
L
= 4
, V
S
= 28V
HIGH CURRENT CAPABILITY (UP TO 3.5A)
STAND-BY FUNCTION
AC SHORT CIRCUIT PROTECTION
THERMAL OVERLOAD PROTECTION
DESCRIPTION
The TDA7262 is class AB dual Hi-Fi Audio power
amplifier assembled in Multiwatt package, spe-
cilally designed for high quality stereo application
as Hi-Fi music centers and TV sets.
March 1995
Figure 1: Stereo Application Circuit with Stand-By
MULTIWA TT11
ORDERING NUMBER: TDA7262
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TEST CIRCUIT
ABSOLUTE MAXIMUM RATINGS
Symbol
Parameter
Value
Unit
V
S
Supply Voltage
35
V
I
O
Output Peak Current (repetitive f > 20Hz)
3.5
A
I
O
Output Peak Current (non repetitive, t > 100
s)
4.5
A
P
tot
Power Dissipation (T
case
= 70
C)
30
W
T
stg
, T
j
Storage and Junction Temperature
-40 to 150
C
PIN CONNECTION
TDA7262
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THERMAL DATA
Symbol
Description
Value
Unit
R
th j-case
Thermal Resistance Junction-case
Max
2.5
C/W
ELECTRICAL CHARACTERISTICS (Refer to the stereo test circuit, V
S
= 28V; f = 1KHz; T
amb
= 25
C,
unless otherwise specified)
Symbol
Parameter
Test Condition
Min.
Typ.
Max.
Unit
V
S
Supply Voltage
8
32
V
V
O
Quiescent Output Voltage
V
S
= 32V
15.5
V
I
d
Total Quiescent Current
V
S
= 28V
V
S
= 32V
65
70
120
mA
mA
P
O
Output Power (each channel)
Music Power STD rules (T = 1s)
V
S
= 32V; d = 10%; R
L
= 4
28
W
d = 10%
R
L
= 4
R
L
= 8
10
22
13
W
W
d = 1%
R
L
= 4
R
L
= 8
18
10
W
W
d
Total Harmonic Distortion
f = 100Hz to 10KHz
P
O
= 0.1 to 14W; R
L
= 4
P
O
= 0.1 to 8W; R
L
= 8
0.2
0.1
%
%
CT
Cross Talk
R
L
= 4
R
S
= 100
f = 1KHz
f = 10KHz
60
50
dB
dB
V
i
Input Saturation Voltage
(Vrms)
300
mV
R
i
Input Resistance
f = 1KHz; non inverting Input
70
200
K
f
L
Low Frequency roll-off (-3dB)
R
L
= 4
40
Hz
f
H
High Frequency roll-off (-3dB)
R
L
= 4
80
KHz
G
V
Closed Loop Voltage Gain
f = 1KHz
35.5
36
36.5
dB
G
V
Closed Loop Gain match
0.5
dB
e
N
Total Input Noise Voltage
A Curve; R
S
= 10K
1.5
V
f = 22Hz to 22KHz; R
S
= 10K
2.5
8
V
SVR
Supply Voltage Rejection
(each channel)
R
S
= 0 to 10K
; f
r
= 100Hz
V
r
= 0.5V
55
dB
T
j
Thermal Shutdown Junction
Temperature
145
C
STAND-BY FUNCTION
V
3
Stand-By Threshold
V
S
= 32V
0.45
0.9
V
A
M
Stand-By Attenuation
V
S
= 32V; V
3
< 0.45V
60
100
dB
I
M
Stand-By Quiescent Current
V
S
= 32V; V
3
< 0.45V
3
5
mA
TDA7262
3/8
APPLICATION SUGGESTION
The recommended values of the components are those shown on application circuit of Figure 1. Differ-
ent values can be used; the following table can help the designer.
Component
Recomm.
Value
Purpose
Larger than
Smaller than
R1 and R3
1.3K
Close loop gain setting (*)
Increase of gain
Decrease of gain
R2 and R4
18
Decrease of gain
Increase of gain
R5 and R6
1
Frequency stability
Danger of oscillations
C1 and C2
2.2
F
Input DC decoupling
higher turn-on delay
- worse turn-ON pop
- higer low freq. cutoff.
Increase of noise
C3
22
F (**)
- Ripple rejection
- Stand-by time constant
Increase of the
Switch-on time
- Degradation of SVR
- worse turn-OFF pop by
stand-by
C4
100nF
Supply setting
Danger of oscillations
C5
1000
F
Supply setting
worse turn-OFF pop
C6 and C7
220
F
Feedback input DC
decoupling
C8 and C9
0.1
F
Frequency stability
Danger of oscillations
C10 and C11
1000
F to
2200
F
Output DC decoupling
Higher low-frequency
cut-off
(*) Closed loop gain must be higher than 26dB.
(**) 220
F in case of stand-by utilization.
Figure 2: Ouput Power vs. Supply Voltage
Figure 3: Ouput Power vs. Supply Voltage
TDA7262
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Figure 4: Distortion vs. Ouput Power
Figure 6: Quiescent Current vs. Supply Voltage
Figure 5: Distortion vs. Ouput Power
Figure 7: Supply Voltage Rejection vs. Frequency
Figure 8: Output Attenuation vs. Vpin 3
Figure 9: Total Power Dissipation & Efficiency
vs. Output Power
TDA7262
5/8
BUILD-IN PROTECTION SYSTEMS
Thermal shut-down
The presence of a thermal limiting circuit offers
the following advantages:
1) an overload on the output (even if it is perma-
nent), or an excessive ambient temperature
can be easily withstood.
2) the heatsink can have a smaller factor of
safety compared with that of a conventional
circuit. There is no device damage in the case
of excessive junction temperature; all that
happens is that P
O
( and therefore Ptot) and
I
O
are reduced. The maximum allowable
power dissipation depends upon the size of
the external heatsink (i.e. its thermal resis-
tance); Figure 12 shows this dissipable power
as a function of ambient temperature for dif-
ferent thermal resistance.
Short circuit (AC Conditions)
The TDA7262 can withstand accidental short cir-
cuits across the speaker made by a wrong con-
nection during normal play operation.
MOUNTING INSTRCTIONS
The power dissipated in the circuit must be re-
moved by adding an external heatsink.
Thanks to the MULTIWATT package attaching
the heatsink is very simple, a screw or a com-
pression spring (clip) being sufficient. between
the heatsink and the package it is better to insert
a layer of silicon grease, to optimize the thermal
contact; no electrical isolation is needed between
the two surfaces.
Figure 11: Total Power Dissipation & Efficiency
vs. Output Power
Figure 12
TDA7262
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MULTIWATT11 PACKAGE MECHANICAL DATA
DIM.
mm
inch
MIN.
TYP.
MAX.
MIN.
TYP.
MAX.
A
5
0.197
B
2.65
0.104
C
1.6
0.063
D
1
0.039
E
0.49
0.55
0.019
0.022
F
0.88
0.95
0.035
0.037
G
1.45
1.7
1.95
0.057
0.067
0.077
G1
16.75
17
17.25
0.659
0.669
0.679
H1
19.6
0.772
H2
20.2
0.795
L
21.9
22.2
22.5
0.862
0.874
0.886
L1
21.7
22.1
22.5
0.854
0.87
0.886
L2
17.4
18.1
0.685
0.713
L3
17.25
17.5
17.75
0.679
0.689
0.699
L4
10.3
10.7
10.9
0.406
0.421
0.429
L7
2.65
2.9
0.104
0.114
M
4.25
4.55
4.85
0.167
0.179
0.191
M1
4.73
5.08
5.43
0.186
0.200
0.214
S
1.9
2.6
0.075
0.102
S1
1.9
2.6
0.075
0.102
Dia1
3.65
3.85
0.144
0.152
TDA7262
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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 men-
tioned 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 ex-
press written approval of SGS-THOMSON Microelectronics.
1995 SGS-THOMSON Microelectronics - All Rights Reserved
MULTIWATT
is a Registered Trademark of SGS-THOMSON Microelectronics
SGS-THOMSON Microelectronics GROUP OF COMPANIES
Australia - Brazil - France - Germany - Hong Kong - Italy - Japan - Korea - Malaysia - Malta - Morocco - The Netherlands - Singapore -
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TDA7262
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