TS4962M_07 Datasheet, PDF (31/41 Pages) STMicroelectronics – 3W filter-free class D audio power amplifier

TS4962M
Application information
Figure 61. Single-ended input typical application
Vcc
Ve
GND
Standby
Cin _Rin
Rin
Cin
GND
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
All formulas are identical except for the gain (with R_in in kΩ) :
A_{V single}
=
-------------^V----^e-------------
Out⁺ – Out^-
=
3_----0_---0_--
R_in
And, due to the internal resistor tolerance we have:
-²---⁷---³--
R_in
≤
A_{V single}
≤
3_----2_---7_--
R_in
In the event that multiple single-ended inputs are summed, it is important that the
impedance on both TS4962M inputs (In^- and In⁺) are equal.
Figure 62. Typical application schematic with multiple single-ended inputs
Vek
GND
Ve1
Cink
Cin1
GND
Ceq
GND
Standby
Rink
Rin1
Req
C2 ^Stdby Internal
Bias
150k
C1 _-
In-
In+ ₊
A1
PWM
150k
Oscillator
B1
B2
Vcc
Vcc
Cs
1u
Out+ GND
C3
Output
H
Bridge
A3
Out-
SPEAKER
GND TS4962
A2
B3
GND
31/41