12 +12W STEREO AMPLIFIERWITH MUTING
WIDESUPPLYVOLTAGERANGE
HIGHOUTPUTPOWER
12+12W@ V
MUTE FACILITY (POP FREE) WITH LOW
CONSUMPTION
AC SHORT CIRCUIT PROTECTION
THERMAL OVERLOADPROTECTION
=28V, RL=8Ω, THD=10%
S
TDA7263
DESCRIPTION
The TDA7263 is class AB dual audio power amplifier assembled in the new Clipwatt package,
specially designed for high quality sound applicationas HI-FI musiccentersandstereo TV sets.
TEST AND APPLICATION CIRCUIT
Clipwatt11
ORDERING NUMBER:TDA7263
March 1995
This is advanced informationon anew product now in development or undergoing evaluation. Details are subjectto change without notice.
1/8
TDA7263
ABSOLUTE MAXIMUMRATINGS
Symbol Parameter Value Unit
V
S
I
O
I
O
P
tot
T
op
T
stg,Tj
PIN CONNECTION (Top view)
SupplyVoltage 35 V
Output Peak Current (repetitive f >20Hz) 2.5 A
Output Peak Current (non repetitive, t = 100µs) 3.5 A
TotalPower Dissipation (T
=70°C) 25 W
case
Operating Temperature Range 0 to 70 °C
Storage & Junction Temperature -40 to 150 °C
BLOCK DIAGRAM
2/8
THERMAL DATA
Symbol Parameter Value Unit
R
th j-case
Thermal resistance junction to case Max 3 °C/W
TDA7263
ELECTRICAL CHARACTERISTICS (Refer to the stereo test and applicationcircuit, VS= 28V;RL=8
Gv= 30dB;f = 1KHz;T
Symbol Parameter Test Condition Min. Typ. Max. Unit
V
S
V
O
I
q
P
O
d Total Harmonic Distortion P
CT Cross Talk R
R
I
f
L
f
H
N Total Input Noise Voltage A Curve; RS = 10KΩ 1.5 mV
e
SVR Supply Voltage Rejection
T
j
MUTE FUNCTION
VT
MUTE
VT
PLAY
ATT
I
qMUTE
Supply Voltage 10 32 V
Quiescent Output Voltage 13.5 V
Total Quiescent Current 70 95 mA
Output Power (RMS) d = 10% Tamb = 85°C
Input Resistance 100 200 KΩ
Low FrequencyRoll-off (-3dB) 40 Hz
High Frequency Roll-off (-3dB) 80 KHz
(each channel)
Thermal Shutdown Junction
Temperature
Mute Threshold 1 1.6 V
Play Threshold 4.5 V
Mute Attenuation 70 100 dB
AM
Quiescent Current @ Mute 7 10 mA
=25°C unless otherwise specified.)
amb
d=1%
= 1W, f = 1kHz
O
f = 100Hz to10KHz; P
= 10KΩ; f = 1KHz 70 dB
S
= 10KΩ; f = 10KHz 60 dB
R
S
f = 22Hz to 22KHz; R
=10KΩ; f= 100Hz; Vr=0.5V 45 60 dB
R
S
10 12
9.5
0.02 0.2
=0.1to 8W
O
S = 10KΩ 310µV
0.5
145 °C
Ω;
W
W
%
TYPICAL CHARACTERISTICS (referred to the typical Application Circuit, VS= 28V, RL=8Ω, unless
otherwisespecified)
Figure1: Output Power vs. Supply Voltage
Figure2: Distortion vs. Output Power
3/8
TDA7263
Figure3: QuiescentCurrent vs. Supply Voltage
Figure5: Crosstalk vs. Frequency
Figure 4: SupplyVoltageRejectionvs.
Frequency
Figure 6: OutputAttenuation& Quiescent
Current vs. V
pin3
Figure7: Total Power Dissipation vs. Output
Power
4/8
Figure 8: MaximumallowablePowerdissipation
vs.Ambient Temperature
TDA7263
APPLICATIONSUGGESTION
The recommendedvalues of the componentsare those shown on the typicalapplicationcircuit.Different
valuescan be used; the following table can help the designer.
Component
R1 and R3 1.5KΩ Close loop gain setting (*) Increase of gain Decrease of gain
R2 and R4 47Ω Close loop gain setting (*) Decrease of gain Increase of gain
R5 and R6 4.7Ω Frequency stability Danger of oscillations
C1 and C2 100nF Input DC decoupling HigherSVR Higher low frequency cutoff
C3 47µF - Ripple Rejection
C4 100nF Supply Voltage Bypass Danger of oscillations
C5 1000µF Supply Voltage Bypass
C6 and C7 47µF Feedback input DC
C8 and C9 0.1µF Frequency stability Danger of oscillations
C10 and C11 1000µF Output DC decoupling Higher low-frequency cut-off
(*) Closed loop gain must be higher than 26dB
Recomm.
Value
Purpose Larger Than Smaller Than
- Mute time constant
decoupling
Increase of the Switch-on
time
Increase of the Switch-on
time
- Degradation of SVR
- Worseturn-off popbymuting
Danger of Switch-on time
Figure9: P.C. Boardand ComponentLayout(1:1 scale)
Note: Use either C1, C2 (Polyester) orC1(*), C2(*) (Electrolytic) but not both.
5/8
TDA7263
BUILT-INPROTECTION SYSTEMS
THERMAL SHUT-DOWN
The presence of a thermal limiting circuit offers
the following advantages:
1-an overloadon 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 devicedamagein the case
of excessive junction temperature; if for any
reason the junction temperatureincreases up
to 145°C. the thermal shutdown simply re-
duces the output power and therefore the
power dissipation.
The maximum allowable power dissipation depends upon the thermal resistance junction-ambient. Figure 8 shows the dissipable power as a
function of ambient temperature for different
heatsinkthermalresistance.
SHORTCIRCUIT (AC CONDITIONS)
The TDA7263 can withstand accidental short cir-
cuits across the speaker made by a wrong connectionduringnormal play operation.
6/8
CLIPWATT11 PACKAGE MECHANICAL DATA
TDA7263
DIM.
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
mm inch
7/8
TDA7263
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 itsuse. No
license is granted by implication or otherwise under any patent or patent rights of SGS-THOMSON Microelectronics. Specifications mentioned 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 express written approval of SGS-THOMSON Microelectronics.
1995 SGS-THOMSON Microelectronics - All RightsReserved
SGS-THOMSON Microelectronics GROUP OF COMPANIES
Australia - Brazil- France - Germany - Hong Kong -Italy- Japan - Korea -Malaysia -Malta - Morocco - The Netherlands - Singapore -
Spain - Sweden - Switzerland - Taiwan - Thaliand - United Kingdom- U.S.A.
8/8
Loading...