TDA7264 Datasheet, PDF (6/12 Pages) STMicroelectronics – 25+25W STEREO AMPLIFIER WITH MUTE/ST-BY

TDA7264 - TDA7264A
APPLICATIONS SUGGESTION for TDA7264
(Demo Board Schematic)
The recommended values of the external compo-
nents are those shown on the demo board sche-
matic. Different values can be used: the following
table can help the designer.
COMPONENTS
R1
R2
R3
R4
R5, R6
C1, C2
C3
C4, C6
C5, C7
C8, C9
Dz
Q1
RECOMMENDED
VALUE
10KΩ
15KΩ
18KΩ
15KΩ
4.7Ω
1µF
1µF
1000µF
0.1µF
0.1µF
5.1V
BC107
PURPOSE
Mute Circuit
Mute Circuit
Mute Circuit
Mute Circuit
Frequency Stability
Input DC
Decoupling
St-By/Mute Time
Constant
Supply Voltage
Bypass
Supply Voltage
Bypass
Frequency Stability
Mute Circuit
Mute Circuit
LARGER THAN
RECOMMENDED VALUE
Increase of Dz
Biasing Current
Vpin # 4 Shifted Downward
Vpin # 4 Shifted Upward
Vpin # 4 Shifted Upward
Danger of Oscillations
SMALLER THAN
RECOMMENDED VALUE
Vpin # 4 Shifted Upward
Vpin # 4 Shifted Downward
Vpin # 4 Shifted Downward
Danger of Oscillations
Higher Low Frequency
Cutoff
Larger On/Off Time
Smaller On/Off Time
Danger of Oscillations
Danger of Oscillations
APPLICATIONS SUGGESTION for TDA7264A
(Demo Board Schematic)
The recommended values of the external compo-
COMPONENTS
RECOMMENDED
VALUE
PURPOSE
R1
10KΩ
Mute Circuit
R2
R3
R4
R7, R10
C1, C2
C3
C4, C6
C5, C7
C8, C9
Dz
Q1
15KΩ
18KΩ
15KΩ
4.7Ω
1µF
1µF
1000µF
0.1µF
0.1µF
5.1V
BC107
Mute Circuit
Mute Circuit
Mute Circuit
Frequency Stability
Input DC
Decoupling
St-By/Mute Time
Constant
Supply Voltage
Bypass
Supply Voltage
Bypass
Frequency Stability
Mute Circuit
Mute Circuit
nents are those shown are the demo board sche-
matic different values can be used: the following
table can help the designer.
LARGER THAN
RECOMMENDED VALUE
Increase of Dz
Biasing Current
Vpin # 5 Shifted Downward
Vpin # 5 Shifted Upward
Vpin # 5 Shifted Upward
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
MUTE, STAND-BY TRUTH TABLE
SW1
A
A
B
B
SW2
A
B
B
A
STAND-BY
STAND-BY
MUTE
PLAY
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