TDA8924 Datasheet, PDF (18/35 Pages) NXP Semiconductors – 2 x 120 W class-D power amplifier

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Every decoupling to ground (plane) must be made as close as possible to the pin.
To handle 20 Hz under all conditions in stereo SE mode, the external power supply
needs to have a capacitance of at least 4700 µF per supply line; V_P = ±27 V (max).
(1) BTL: remove IN2, R8, R9, C18, C19, C21 and close J3 and J4.
(2) BTL: connect loudspeaker between OUT1+ and OUT2−.
(3) BTL: R1 and R2 are only required when an asymmetrical supply is used (V_SS = 0 V).
(4) In case of hum close J1 and J2.
GND
VDD ^{+25 V C6}
GND
VSS ^{−25 V}
C7
100 nF
R1⁽³⁾
10 kΩ
R2⁽³⁾
9.1 kΩ
100 nF
GND
R6 C16
5.6 kΩ 470 nF
in 1
J1⁽⁴⁾
GND
J2⁽⁴⁾
R7 C17
5.6 kΩ 470 nF
J3⁽¹⁾ J4⁽¹⁾
R8 C18
5.6 kΩ 470 nF
in 2
R9 C19
5.6 kΩ 470 nF
L1
BEAD
L2
BEAD
L3
BEAD
L4
BEAD
C1
470 µF
GND
C2
470 µF
VDDP
C3
47 µF
VSSP
C4
47 µF
GND
C5
47 µF
VDDA
VSSA
VSSA
VDDA
R4 39 kΩ
R3
39 kΩ
S1
C8
220 nF
on
mute
off
Z1
5.6 V
GND
GND
VDDA VSSA
C10
C11
C12
100 nF 220 nF 100 nF
C9
220 nF
GND
C20
330 pF
VDDA1 VSSA1
IN1+ 10
12
8
IN1−
9
R5
30 kΩ
OSC
7
GND
MODE
6
SGND1
SGND
11
SGND2
2
TDA8924
IN2+
5
C21
330 pF _IN2−
41
3
24
18
13
19
GND
C34
100 nF
VSSA2
C35
220 nF
VDDA2
VSSD
C32
GND _{220 nF}
C36
100 nF
STABI
C33
47 pF
PROT HW
GND
VDDP VSSP
C13
C14 C15
100 nF 220 nF 100 nF
GND
VDDP1 VSSP1
14
17
15 ^BOOT1
C22
15 nF
16 ^OUT1
OUT2
21
C23
15 nF
22 ^BOOT2
23
20
VDDP2 VSSP2
C37
100 nF
C38
220 nF
GND
C39
100 nF
GND
C24
560 pF
C26
1 µF
R10
4.7 Ω
L5
10 µH
L6
10 µH
R11
4.7 Ω _C27
1 µF
C25
560 pF
GND
VSSA VDDA
VSSP
VDDP VSSP
GND
C28
220 nF
R12
22 Ω
C30
15 nF
R13
22 Ω
C29
220 nF
C31
15 nF
GND
SGND
OUT1−
SE 2 Ω
OUT1+
(2)
OUT2−
BTL 4 Ω
SE 2 Ω
OUT2+
SGND
MDB570
Fig.9 Single-chip class-D audio amplifier application diagram.