TDA8922 Datasheet, PDF (19/36 Pages) NXP Semiconductors – 2 x 25 W class-D power amplifier

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VDD ^{+25 V}
GND
VSS _{−25 V}
C6
R1⁽³⁾
100 nF 10 kΩ
C7
R2⁽³⁾
100 nF 9.1 kΩ
L1
BEAD
L2
BEAD
L3
BEAD
L4
BEAD
C1
470 µF
C2
470 µF
VDDP
C3
47 µF
VSSP
C4
47 µF
VDDA
C5
47 µF
VSSA
VDDA VSSA
C10
C11
C12
100 nF 220 nF 100 nF
VSSA
C9
220 nF
R5
30 kΩ
VDDA
R4 39 kΩ
R3
39 kΩ
S1
C8
220 nF
on
mute
off
Z1
5.6 V
VDDP VSSP
C13
C14 C15
100 nF 220 nF 100 nF
R6 C16
5.6 kΩ 470 nF
in 1
VDDA1 VSSA1
IN1+ 10
12
8
R7
5.6 kΩ
C20
330 pF
IN1−
9
OSC
7
MODE
6
VDDP1 VSSP1
14
17
15 ^BOOT1
C22
15 nF
C17
470 nF
J1
SGND1
SGND
11
16 ^OUT1
J3 J4⁽¹⁾
TDA8922TH
J2 ⁽⁴⁾
C18
SGND2
2
OUT2
21
470 nF
IN2+
5
C23
15 nF
R8
C21
5.6 kΩ
330 pF _IN2−
in 2
R9 C19
41
3
24
18
13
19
22 ^BOOT2
23
20
5.6 kΩ 470 nF
VSSA2 VDDA2
VSSD STABI PROT HW
VDDP2 VSSP2
C34
C35
C36
100 nF 220 nF 100 nF
VSSA VDDA
C32
220 nF
C33
47 pF
VSSP
C37
C38 C39
100 nF 220 nF 100 nF
VDDP VSSP
C24
560 pF
C26
470 nF
R10
4.7 Ω
C28
220 nF
R12
22 Ω
L5
27 µH
L6
27 µH
R11
4.7 Ω _C27
470 nF
C25
560 pF
R13
22 Ω
C29
220 nF
C30
15 nF
SGND
OUT1−
OUT1+
SE 4 Ω
(2)
BTL 8 Ω
C31
15 nF
OUT2−
OUT2+
SGND
SE 4 Ω
MGU997
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.
Fig.10 Single-chip class-D audio amplifier application diagram (reference design for SE and BTL).