TDA7263
12 +12W STEREO AMPLIFIER WITH MUTING
WIDE SUPPLY VOLTAGE RANGE
HIGH OUTPUT POWER
12+12W @ V
S
=28V, R
L
= 8
, THD=10%
MUTE FACILITY (POP FREE) WITH LOW
CONSUMPTION
AC SHORT CIRCUIT PROTECTION
THERMAL OVERLOAD PROTECTION
DESCRIPTION
The TDA7263 is class AB dual audio power am-
plifier assembled in the new Clipwatt package,
specially designed for high quality sound applica-
tion as HI-FI music centers and stereo TV sets.
This is advanced information on a new product now in development or undergoing evaluation. Details are subject to change without notice.
March 1995
TEST AND APPLICATION CIRCUIT
Clipwatt11
ORDERING NUMBER:TDA7263
1/8
ABSOLUTE MAXIMUM RATINGS
Symbol
Parameter
Value
Unit
V
S
Supply Voltage
35
V
I
O
Output Peak Current (repetitive f >20Hz)
2.5
A
I
O
Output Peak Current (non repetitive, t = 100
s)
3.5
A
P
tot
Total Power Dissipation (T
case
= 70
C)
25
W
T
op
Operating Temperature Range
0 to 70
C
T
stg,Tj
Storage & Junction Temperature
-40 to 150
C
PIN CONNECTION (Top view)
BLOCK DIAGRAM
TDA7263
2/8
ELECTRICAL CHARACTERISTICS (Refer to the stereo test and application circuit, V
S
= 28V; R
L
= 8
;
G
v
= 30dB; f = 1KHz; T
amb
= 25
C unless otherwise specified.)
Symbol
Parameter
Test Condition
Min.
Typ.
Max.
Unit
V
S
Supply Voltage
10
32
V
V
O
Quiescent Output Voltage
13.5
V
I
q
Total Quiescent Current
70
95
mA
P
O
Output Power (RMS)
d = 10% Tamb = 85
C
d = 1%
10
12
9.5
W
W
d
Total Harmonic Distortion
P
O
= 1W, f = 1kHz
f = 100Hz to 10KHz; P
O
= 0.1 to 8W
0.02
0.2
0.5
%
CT
Cross Talk
R
S
= 10K
; f = 1KHz
70
dB
R
S
= 10K
; f = 10KHz
60
dB
R
I
Input Resistance
100
200
K
f
L
Low Frequency Roll-off (-3dB)
40
Hz
f
H
High Frequency Roll-off (-3dB)
80
KHz
e
N
Total Input Noise Voltage
A Curve; R
S
= 10K
1.5
mV
f = 22Hz to 22KHz; R
S
= 10K
3
10
V
SVR
Supply Voltage Rejection
(each channel)
R
S
= 10K
; f = 100Hz; Vr = 0.5V
45
60
dB
T
j
Thermal Shutdown Junction
Temperature
145
C
MUTE FUNCTION
VT
MUTE
Mute Threshold
1
1.6
V
VT
PLAY
Play Threshold
4.5
V
ATT
AM
Mute Attenuation
70
100
dB
I
qMUTE
Quiescent Current @ Mute
7
10
mA
TYPICAL CHARACTERISTICS (referred to the typical Application Circuit, V
S
= 28V, R
L
= 8
, unless
otherwise specified)
Figure 1: Output Power vs. Supply Voltage
Figure 2: Distortion vs. Output Power
THERMAL DATA
Symbol
Parameter
Value
Unit
R
th j-case
Thermal resistance junction to case
Max
3
C/W
TDA7263
3/8
Figure 3: Quiescent Current vs. Supply Voltage
Figure 4: Supply Voltage Rejection vs.
Frequency
Figure 5: Crosstalk vs. Frequency
Figure 6: Output Attenuation & Quiescent
Current vs. V
pin3
Figure 7: Total Power Dissipation vs. Output
Power
Figure 8: Maximum allowable Power dissipation
vs. Ambient Temperature
TDA7263
4/8
Figure 9: P.C. Board and Component Layout (1:1 scale)
APPLICATION SUGGESTION
The recommended values of the components are those shown on the typical application circuit. Different
values can be used; the following table can help the designer.
Component
Recomm.
Value
Purpose
Larger Than
Smaller Than
R1 and R3
1.5K
Close loop gain setting (*)
Increase of gain
Decrease of gain
R2 and R4
47
Close loop gain setting (*)
Decrease of gain
Increase of gain
R5 and R6
4.7
Frequency stability
Danger of oscillations
C1 and C2
100nF
Input DC decoupling
Higher SVR
Higher low frequency cutoff
C3
47
F
- Ripple Rejection
- Mute time constant
Increase of the Switch-on
time
- Degradation of SVR
- Worse turn-off pop by muting
C4
100nF
Supply Voltage Bypass
Danger of oscillations
C5
1000
F
Supply Voltage Bypass
C6 and C7
47
F
Feedback input DC
decoupling
Increase of the Switch-on
time
Danger of Switch-on time
C8 and C9
0.1
F
Frequency stability
Danger of oscillations
C10 and C11
1000
F
Output DC decoupling
Higher low-frequency cut-off
(*) Closed loop gain must be higher than 26dB
Note: Use either C1, C2 (Polyester) or C1(*), C2(*) (Electrolytic) but not both.
TDA7263
5/8
BUILT-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; if for any
reason the junction temperature increases up
to 145
C. the thermal shutdown simply re-
duces the output power and therefore the
power dissipation.
The maximum allowable power dissipation de-
pends upon the thermal resistance junction-ambi-
ent. Figure 8 shows the dissipable power as a
function of ambient temperature for different
heatsink thermal resistance.
SHORT CIRCUIT (AC CONDITIONS)
The TDA7263 can withstand accidental short cir-
cuits across the speaker made by a wrong con-
nection during normal play operation.
TDA7263
6/8
CLIPWATT11 PACKAGE MECHANICAL DATA
DIM.
mm
inch
MIN.
TYP.
MAX.
MIN.
TYP.
MAX.
A
3.10
0.122
B
1.10
0.04
C
0.15
0.006
D
1.50
0.059
E
0.52
0.02
F
0.80
0.03
G
1.70
0.066
G1
17.00
0.66
H1
12.00
0.48
H3
20.00
0.79
L
17.90
0.70
L1
14.40
0.57
L2
11.00
0.43
M
2.54
0.1
M1
2.54
0.1
TDA7263
7/8
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
SGS-THOMSON Microelectronics GROUP OF COMPANIES
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TDA7263
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