TDA8922 PHILIPS [NXP Semiconductors], TDA8922 Datasheet - Page 19

• Manufacturer Part Number: TDA8922
• Description: 2 x 25 W class-D power amplifier
• Manufacturer: PHILIPS [NXP Semiconductors]

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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 F per supply line; V
GND
V DD
in 1
in 2
V SS
25 V
25 V
5.6 k
5.6 k
5.6 k
5.6 k
J1
J2
C6
100 nF
C7
100 nF
R6
R7
R8
R9
(4)
470 nF
470 nF
470 nF
470 nF
C17
C18
C16
C19
J3
R1
10 k
R2
9.1 k
(3)
(3)
J4
Fig.10 Single-chip class-D audio amplifier application diagram (reference design for SE and BTL).
(1)
BEAD
BEAD
BEAD
BEAD
L1
L2
L3
L4
330 pF
330 pF
SGND
C20
C21
SGND1
SGND2
C1
470 F
C2
470 F
C4
47 F
C5
47 F
IN1
IN1
IN2
IN2
100 nF
100 nF
C10
C34
V DDA
11
V SSA
8
9
2
5
4
10
1
V DDA1
V SSA2
V DDA
V SSA
220 nF
220 nF
C3
47 F
C35
C11
V SSA
V DDA
12
V DDP
V SSP
3
V SSA1
V DDA2
100 nF
100 nF
C36
C12
P
= 27 V (max).
220 nF
24
V SSD
C9
220 nF
C32
TDA8922TH
V SSA
18
7
OSC
STABI
R5
30 k
V SSP
47 pF
C33
13
PROT
6
MODE
19
HW
(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
(4) In case of hum, close J1 and J2.
C8
220 nF
R4 39 k
100 nF
100 nF
S1
C13
C37
V DDP
V DDP
14
23
V DDP1
V DDP2
on
mute
off
220 nF
220 nF
39 k
C14
C38
R3
V DDA
V SSP
V SSP
17
20
15
16
21
22
100 nF
100 nF
V SSP1
V SSP2
C15
C39
Z1
5.6 V
BOOT1
OUT1
OUT2
BOOT2
15 nF
15 nF
C22
C23
R10
4.7
R11
4.7
C24
560 pF
C25
560 pF
27 H
27 H
L5
L6
470 nF
470 nF
C26
C27
220 nF
220 nF
22
22
C28
C29
R12
R13
15 nF
15 nF
C30
C31
OUT1
OUT1
OUT2
OUT2
(2)
SGND
SGND
MGU997
BTL 8
SS
SE 4
SE 4
= 0 V).