TS4962M_07 Datasheet, PDF (4/41 Pages) STMicroelectronics – 3W filter-free class D audio power amplifier

Application component information
2
Application component information
TS4962M
Table 3. Component information
Component
Functional description
C_s
R_in
Input
capacitor
Bypass supply capacitor. Install as close as possible to the TS4962M to
minimize high-frequency ripple. A 100nF ceramic capacitor should be
added to enhance the power supply filtering at high frequency.
Input resistor to program the TS4962M differential gain (gain = 300kΩ/R_in
with R_in in kΩ).
Due to common mode feedback, these input capacitors are optional.
However, they can be added to form with R_in a 1st order high pass filter with
-3dB cut-off frequency = 1/(2*π*R_in*C_in).
Figure 1. Typical application schematics
Vcc
In+
GND
GND
+
Rin
Differential
Input
In-
-
Rin
Input
capacitors
are optional
GND
Vcc
C2 ^Stdby Internal
Bias
150k
B1
B2
Cs
Vcc
1u
Out+
GND
C3
C1 _-
In-
In+ ₊
A1
150k
PWM
Output
H
Bridge
A3
Out-
SPEAKER
Oscillator
GND TS4962
A2
B3
GND
Vcc
In+
GND
GND
+
Rin
Differential
Input
In-
-
Rin
Input
capacitors
are optional
GND
Vcc
C2 ^Stdby Internal
Bias
150k
B1
B2
Cs
Vcc
1u
4 Ohms LC Output Filter
Out+
GND
C3
15µH
C1 _-
In-
In+ ₊
A1
150k
PWM
Output
H
Bridge
A3
Out-
2µF
GND
2µF
15µH
Oscillator
GND TS4962
A2
B3
30µH
GND
1µF
GND
1µF
30µH
8 Ohms LC Output Filter
Load
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