SA7265 Datasheet, PDF (10/11 Pages) Silan Microelectronics Joint-stock – 2CH AUDIO POWER AMPLIFIER(25W X2)

SA7265
APPLICATION SUGGEST
The recommended values of the external components are those shown are the Typical Application Circuit in
Split Supply:
RECOMMENDED
COMPONENTS
VALUE
PURPOSE
LARGER THAN
RECOMMENDED VALUE
SMALLER THAN
RECOMMENDED VALUE
Increase of Dz
R1ҏ
10KΩ
Mute Circuit
Biasing Current
VMUTE/STBY Shifted VMUTE/STBY
Shifted
R2ҏ
15KΩ
Mute Circuit
Downward
Upward
VMUTE/STBY Shifted VMUTE/STBY
Shifted
R3
18KΩ
Mute Circuit
Upward
Downward
VMUTE/STBY Shifted VMUTE/STBY
Shifted
R4ҏ
15KΩ
Mute Circuit
Upward
Downward
R5, R8
R6, R9
18KΩ
560Ω
Closed
Loop Gain
Setting*
Increase of Gain
Decrease of Gain
R7 R10
4.7Ω
Frequency
Stability
Danger of Oscillations
Danger of Oscillations
C1, C2
1µF
Input DC
Decoupling
Higher Low Frequency
Cutoff
St-By/Mute
C3
1µF
Time
Larger On/Off Time
Smaller On/Off Time
Constant
C4, C6
1000µF
Supply
Bypass
Danger of Oscillations
C5, C7
0.1µF
Supply
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
HANGZHOU SILAN MICROELECTRONICS CO.,LTD
Http: www.silan.com.cn
REV:1.2 2006.05.25
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