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TDA7269A Datasheet PDF - ST Microelectronics

Part Number TDA7269A
Description 14+14W STEREO AMPLIFIER WITH MUTE & ST-BY
Manufacturers ST Microelectronics 
Logo ST Microelectronics Logo 

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® TDA7269A
14 + 14W STEREO AMPLIFIER WITH MUTE & ST-BY
WIDE SUPPLY VOLTAGE RANGE UP TO
±20V
SPLIT SUPPLY
HIGH OUTPUT POWER
14 + 14W @ THD =10%, RL = 8, VS = +16V
NO POP AT TURN-ON/OFF
MUTE (POP FREE)
STAND-BY FEATURE (LOW Iq)
SHORT CIRCUIT PROTECTION TO GND
THERMAL OVERLOAD PROTECTION
DESCRIPTION
The TDA7269A is class AB dual Audio power am-
plifier assembled in the Multiwatt package, spe-
cially designed for high quality sound application
as Hi-Fi music centers and stereo TV sets.
Figure 1: Typical Application Circuit
Multiwatt11
ORDERING NUMBER: TDA7269A
15K 1µF
MUTE/
ST-BY
IN (L)
5
7
1µF
+5V µP
15K 18K
GND 9
1µF
IN (R) 11
D94AU085
+VS
3
1000µF
+
-
-
+
1
1000µF
4 OUT (L)
18K
8 IN- (L)
10 IN- (R)
4.7
100nF
560
560
18K
2 OUT (R)
4.7
6
-VS 100nF
RL (L)
RL (R)
July 1998
1/7

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TDA7269A equivalent
Figure 3: Test and Application Circuit (Stereo Configuration)
TDA7269A
R2
R1
SW1
DZ
C3
MUTE/
ST-BY 5
IN (L) 7
C1
R4
SW2
R3
GND 9
C2
IN (R) 11
D94AU087
+VS
+VS
3
C4 C5
+ 4 OUT (L)
-
R5 R7
8 IN- (L)
C8
R6
10 IN- (R)
R9
R8
- 2 OUT (R)
+
16
R10
-VS C9
C7 C6
RL (L)
RL (R)
APPLICATIONS SUGGESTION
(Demo Board Schematic)
The recommended values of the external compo-
nents are those shown are the demo board sche-
matic different values can be used: the following
table can help the designer.
COMPONENTS
R1
R2
R3
R4
R5, R8
R6, R9
R7, R10
C1, C2
C3
C4, C6
C5, C7
C8, C9
Dz
RECOMMENDED
VALUE
10K
15K
18K
15K
18K
560
4.7
1µF
1µF
1000µF
0.1µF
0.1µF
5.1V
PURPOSE
Mute Circuit
Mute Circuit
Mute Circuit
Mute Circuit
Closed Loop Gain
Setting (*)
Frequency Stability
Input DC
Decoupling
St-By/Mute Time
Constant
Supply Voltage
Bypass
Supply Voltage
Bypass
Frequency Stability
Mute Circuit
LARGER THAN
RECOMMENDED VALUE
Increase of Dz
Biasing Current
Vpin # 5 Shifted Downward
Vpin # 5 Shifted Upward
Vpin # 5 Shifted Upward
Increase of Gain
Decrease of Gain
Danger of Oscillations
SMALLER THAN
RECOMMENDED VALUE
Vpin # 5 Shifted Upward
Vpin # 5 Shifted Downward
Vpin # 5 Shifted Downward
Danger of Oscillations
Higher Low Frequency
Cutoff
Larger On/Off Time
Smaller On/Off Time
Danger of Oscillations
Danger of Oscillations
(*) Closed loop gain has to be => 25dB
5/7


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