Datasheet

COMPONENTS
RECOMMENDED
VALUE
PURPOSE
LARGER THAN
RECOMMENDED VALUE
SMALLER THAN
RECOMMENDED VALUE
R1 10K Mute Circuit
Increase of Dz
Biasing Current
R2 15K Mute Circuit V
pin
# 5 Shifted Downward V
pin
# 5 Shifted Upward
R3 18K Mute Circuit V
pin
# 5 Shifted Upward V
pin
# 5 Shifted Downward
R4 15K Mute Circuit V
pin
# 5 Shifted Upward V
pin
# 5 Shifted Downward
R5, R8 18K
Closed Loop Gain
Setting (*)
Increase of Gain
R6, R9 560 Decrease of Gain
R7, R10 4.7 Frequency Stability Danger of Oscillations Danger of Oscillations
C1, C2 1µF
Input DC
Decoupling
Higher Low Frequency
Cutoff
C3 1µF
St-By/Mute Time
Constant
Larger On/Off Time Smaller On/Off Time
C4, C6 1000µF
Supply Voltage
Bypass
Danger of Oscillations
C5, C7 0.1µF
Supply Voltage
Bypass
Danger of Oscillations
C8, C9 0.1µF Frequency Stability
Dz 5.1V Mute Circuit
Q1 BC107 Mute Circuit
(*) Closed loop gain has to be => 25dB
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.
MUTE, STAND-BY TRUTH TABLE
SW1 SW2
B A STAND-BY
B B STAND-BY
A A MUTE
A B PLAY
TDA7265
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