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TS4984IQT Datenblatt(PDF) 2 Page - STMicroelectronics

Teilenummer TS4984IQT
Bauteilbeschribung  2 x 1W Stereo audio power amplifier with active low standby mode
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Hersteller  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
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TS4984
Typical Application
2/29
1
Typical Application
Figure 1 shows a schematic view of a typical audio amplification application using the TS4984. Table 1
describes the components used in this typical application.
Figure 1: Typical application schematic
Table 1: External component descriptions
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.
1
2
12
16
15
Bias
3
AV = -1
Bypass L
Standby
+
-
+
-
AV = -1
+
-
+
-
10
9
8
7
11
Bypass R
VO-L
VO+L
VO-R
VO+R
IN-L
IN+L
IN+R
IN-R
U1
TS4984
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
Wire optional
Internal connection
22k
22k
22k
22k
100n
100n


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