TS4984FC Datasheet, PDF (2/30 Pages) STMicroelectronics – 1.2W Stereo Audio Power Amplifier with Active Low Standby Mode

Typical Application Schematic
1 Typical Application Schematic
Figure 1 show a typical application schematic for the TS4984FC.
Figure 1. Application information
Cfeed1
Rfeed1
22k
VCC
Cs
INPUT1 Cin1
100nF
Rin1
22k
A1 IN1- _-
B2 IN1+ ₊
Cb
StandBy
Control
W ire optional
Internal connection
INPUT2 Cin2
100nF
Rin2
22k
C5 BYPASS
C3 STDBY
Bias
D6 IN2+ ₊
E5 IN2- _-
C1 BYPASS
U1
VOUT1- A3
-
AV = -1
+
VOUT1+ B4
OUTPUT1
+
VOUT2- E3
-
AV = -1
+
VOUT2+ D4
OUTPUT2
+
TS4984FC
22k
Rfeed2
Cfeed2
Table 1. External component descriptions
Components
Functional Description
R_{in L,R}
C_{in L,R}
R_{feed L,R}
C_s
C_b
A_{V L, R}
Inverting input resistors which sets the closed loop gain in conjunction with R_feed.
These resistors also form a high pass filter with C_in = 1/2 x Pi x R_in x C_in))
Input coupling capacitors which blocks the DC voltage at the amplifier input terminal
Feedback resistors which sets the closed loop gain in conjunction with R_in
Supply Bypass capacitor which provides power supply filtering
Bypass pin capacitor which provides half supply filtering
Closed loop gain in BTL configuration = 2 x (R_feed / R_in) on each channel
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