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TS4872 数据表(PDF) 24 Page - STMicroelectronics

部件名 TS4872
功能描述  RAIL TO RAIL INPUT/OUTPUT 1W AUDIO POWER AMPLIFIER WITH STANDBY MODE
PDF  29 Pages
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制造商  STMICROELECTRONICS [STMicroelectronics]
网页  http://www.st.com
标志 STMICROELECTRONICS - STMicroelectronics

TS4872 数据表(HTML) 24 Page - STMicroelectronics

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Then
So, we could use for Cfeed a 220pF capacitor
value that gives 24kHz.
Now, we can calculate the value of Cb with the
formula
τb = 50kΩxCb >> τin = (Rin+Rfeed)xCin
which permits to reduce the pop and click effects.
Then Cb >> 0.8
µF.
We can choose for Cb a normalized value of 2.2
µF
that gives good results in THD+N and PSRR.
In the following tables, you could find three another
examples with values required for the demoboard.
Remark : components with (*) marking are
optional.
Application n°1 : 20Hz to 20kHz bandwidth and
6dB gain BTL power amplifier.
Components :
Application n°2 : 20Hz to 20kHz bandwidth and
20dB gain BTL power amplifier.
Components :
Application n°3 : 50Hz to 10kHz bandwidth and
10dB gain BTL power amplifier.
Components :
Designator
Part Type
R1
22k / 0.125W
R4
22k / 0.125W
R6
Short Cicuit
R7
330k / 0.125W
C5
470nF
C6
100
µF
C7
100nF
C9
Short Circuit
C10
Short Circuit
C12
1
µF
S1, S2, S6, S7
2mm insulated Plug
10.16mm pitch
S8
2 pts connector 2.54mm
pitch
J1
SMB plug
U1
TS4872IJ
C FEED =
1
2
π RFEEDFCH
--------------------------------------- = 265pF
Designator
Part Type
R1
110k / 0.125W
R4
22k / 0.125W
R6
Short Cicuit
R7
330k / 0.125W
C5
470nF
C6
100
µF
C7
100nF
C9
Short Circuit
C10
Short Circuit
C12
1
µF
S1, S2, S6, S7
2mm insulated Plug
10.16mm pitch
S8
2 pts connector 2.54mm
pitch
J1
SMB Plug
U1
TS4872IJ
Designator
Part Type
R1
33k / 0.125W
R2
Short Circuit
R4
22k / 0.125W
R6
Short Cicuit
R7
330k / 0.125W
C2
470pF
C5
150nF
C6
100
µF
C7
100nF
C9
Short Circuit



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