Document
®
TDA7263
12 +12W STEREO AMPLIFIER WITH MUTING
WIDE SUPPLY VOLTAGE RANGE
HIGH OUTPUT POWER
12+12W @ VS=28V, RL = 8Ω, THD=10%
MUTE FACILITY (POP FREE) WITH LOW CONSUMPTION
) AC SHORT CIRCUIT PROTECTION t(s THERMAL OVERLOAD PROTECTION roduc DESCRIPTION
The TDA7263 is class AB dual audio power am-
P plifier assembled in the new Clipwatt package, te specially designed for high quality sound applicale tion as HI-FI music centers and stereo TV sets. Obsolete Product(s) - Obso TEST AND APPLICATION CIRCUIT
Clipwatt11 ORDERING NUMBER:TDA7263
September 2003
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This is advanced information on a new product now in development or undergoing evaluation. Details are subject to change without notice.
TDA7263
ABSOLUTE MAXIMUM RATINGS
Symbol VS IO Ptot Top
Tstg,Tj
Parameter Supply Voltage without Load Output Peak Current (repetitive f >20Hz) Total Power Dissipation (Tcase = 70°C) Operating Temperature Range Storage & Junction Temperature
Value
Unit
35
V
2
A
25
W
0 to 70
°C
-40 to 150
°C
PIN CONNECTION (Top view)
BLOCK DIAGRAM
Obsolete
Product(s)
-
Obsolete
Product(s)
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TDA7263
THERMAL DATA
Symbol Rth j-case
Parameter Thermal resistance junction to case
Value
Unit
Max
3
°C/W
ELECTRICAL CHARACTERISTICS (Refer to the stereo test and application circuit, VS = 28V; RL = 8Ω; Gv = 30dB; f = 1KHz; Tamb = 25°C unless otherwise specified.)
Symbol
Parameter
Test Condition
Min. Typ. Max. Unit
VS
Supply Voltage
10
30
V
VO
Quiescent Output Voltage
13.5
V
Iq
Total Quiescent Current
70
95
mA
PO
Output Power (RMS)
d = 10% Tamb = 85°C
10
12
W
) d = 1%
9.5
W
t(s d
Total Harmonic Distortion
uc CT
Cross Talk
PO = 1W, f = 1kHz f = 100Hz to 10KHz; PO = 0.1 to 8W
RS = 10KΩ; f = 1KHz
0.02 0.2
%
0.5
70
dB
rod RI
Input Resistance
RS = 10KΩ; f = 10KHz
60
dB
100 200
KΩ
P fL
Low Frequency Roll-off (-3dB)
40
Hz
te fH
High Frequency Roll-off (-3dB)
le eN
Total Input Noise Voltage
A Curve; RS = 10KΩ
80
KHz
1.5
mV
o f = 22Hz to 22KHz; RS = 10KΩ
3
10
µV
s SVR
Supply Voltage Rejection
RS = 10KΩ; f = 100Hz; Vr = 0.5V 45
60
dB
b (each channel)
O Tj
Thermal Shutdown Junction
- Temperature
145
°C
) MUTE FUNCTION
t(s VTMUTE Mute Threshold
1
1.6
V
c VTPLAY Play Threshold
4.5
V
u ATTAM Mute Attenuation
70
100
dB
rod IqMUTE
Quiescent Current @ Mute
7
10
mA
lete P TYPICAL CHARACTERISTICS (referred to the typical Application Circuit, VS = 28V, RL = 8Ω, unless
otherwise specified)
Obso Figure 1: Output Power vs. Supply Voltage
Figure 2: Distortion vs. Output Power
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TDA7263
Figure 3: Quiescent Current vs. Supply Voltage
Figure 4: Supply Voltage Rejection vs. Frequency
te Product(s) Figure 5: Crosstalk vs. Frequency
Figure 6: Output Attenuation & Quiescent Current vs. Vpin3
solete Product(s) - Obsole Figure 7: Total Power Dissipation vs. Output Ob Power
Figure 8: Maximum allowable Power dissipation vs. Ambient Temperature
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TDA7263
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
1.5KΩ 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
Higher SVR
Higher low frequency cutoff
C3
47µF - Ripple Rejection
Increase of the Switch-on - Degradation of SVR
- Mute time constant
time
- Worse turn-off pop by muting
C4
) C5 t(s C6 and C7 c C8 and C9 du C10 and C11
100nF 1000µF
47µF
0.1µF 1000µF
Supply Voltage Bypass Supply Voltage Bypass Feedback input DC decoupling Frequency stability Output DC decoupling
ro (*) Closed loop gain must be higher than 26dB
Danger of oscillations
Increase of the Switch-on time
Danger of Switch-on time
Danger of oscillations Higher low-frequency cut-off
Obsolete Product(s) - Obsolete P Figure 9: P.C. Board and Component Layout (1:1 scale)
Note: Use either C1, C2 (Polyester) or C1(*), C2(*) (Electrolytic) but not both.
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TDA7263
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 permanent), or an excessive ambient temperature can be easily withstood.
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 heatsink thermal resistance.
2-the heatsink can have a smaller factor of safety compared with that of a conventional
SHORT CIRCUIT (AC CONDITIONS)
circuit. There is no device damage in the case The TDA7263 can withstand accidental short cir-
of excessive.