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TS4985 Datenblatt(PDF) 2 Page - STMicroelectronics

Teilenummer TS4985
Bauteilbeschribung  2x1.2w Stereo Audio Power Amplifier with Dedicated Standby Pins
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Hersteller  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

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Typical Application Schematic
TS4985
2/29
1
Typical Application Schematic
Figure 1 shows a typical application schematic for the TS4985.
Table 1.
External component descriptions
Figure 1.
Application schematic
Components
Functional Description
RIN L,R
Inverting input resistors which sets the closed loop gain in
conjunction with Rfeed. These resistors also form a high pass
filter with CIN (fc = 1 / (2 x Pi x RIN x CIN))
CIN L,R
Input coupling capacitors which blocks the DC voltage at the
amplifier input terminal
RFEED L,R
Feedback resistors which sets the closed loop gain in
conjunction with RIN
CS
Supply Bypass capacitor which provides power supply filtering
CB
Bypass pin capacitor which provides half supply filtering
AV L, R
Closed loop gain in BTL configuration = 2 x (RFEED / RIN) on
each channel
VCC
Cs
1u
1
2
3
VCC
Rin-L
Cin-L
Input L
GND
Rin-R
Cin-R
Input R
GND
Cfeed-L
Rfeed-L
Cfeed-R
Rfeed-R
Cb
1u
Neg. Output L
Pos. Output L
Neg. Output R
Pos. Output R
22k
22k
22k
22k
100n
100n
Bias
AV = -1
Bypass
Standby L
+
-
+
-
AV = -1
+
-
+
-
VO-L
VO+L
VO-R
VO+R
IN-L
IN+L
IN+R
IN-R
Standby R
A1
B2
C5
C3
D6
E5
C1
E1
D2
D4
E3
B4
A3
B6
A5
TS4985
1
2
3
VCC


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