TDA7269 Datasheet, PDF (5/7 Pages) STMicroelectronics – 10+10W STEREO AMPLIFIER WITH MUTE & ST-BY

Figure 3: Test and Application Circuit (Stereo Configuration)
TDA7269
R2
R1
SW1
DZ
C3
MUTE/
ST-BY ₅
IN (L) 7
C1
R4
R3
SW2
GND 9
C2
IN (R) 11
D94AU087
+V_S
+V_S
3
C4
C5
+
4 OUT (L)
-
R5
R7
8 IN- (L)
C8
R6
10 IN- (R)
R9
R8
-
2 OUT (R)
+
R10
1
6
-V_S
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
10KΩ
15KΩ
18KΩ
15KΩ
18KΩ
560Ω
4.7Ω
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