TDA8929T Datasheet, PDF (22/36 Pages) NXP Semiconductors – Controller class-D audio amplifier

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VDDA mode select
C11 100 nF
D1
(5.6 V)
R1
30 kΩ
on
mute
off
R2
39 kΩ
S1
GND
VSSA
VDDA
C12 100 nF
VSSA
VDD1 VDD2
VSS2 VSS1
3
MODE
6
C1
220 nF
R3
27 kΩ
OSC
7
10 12
U2
1 _PWM2
17
SW2
13
REL2
14
EN2
16
C2
220 nF
SGND1
2
GND
SGND2
11
TDA8929T
19 ^STAB
18 ^VSSD
C5
1 µF
C6
1 µF
J5
J6
C7
1 µF
C3
330 pF
C4
330 pF
C8
1 µF
IN1+ ₅
DIAGCUR
22
CONTROLLER
IN1− ₄
IN2 +
8
IN2 −
9
EN1
21
REL1
23
SW1
24
PWM1
20
15
n.c.
VDDD VSSD
C24
560 pF
VSSD
VSS(sub)
19
R12
5.6 Ω
SW2
16
9
REL2
15
EN2
OUT2
C26
15 nF
VDDD
13
10
U1
BOOT2
R18
200 kΩ
POWERUP
14
C13
100 nF
D2
(7.5 V)
C14
VSSA ^VSSD _{100 nF}
C15
STAB ₆
STAB ₇
TDA8926TH
or
TDA8927TH
2
11
8
VDD1
VDD2
C27
100 nF
VSS2
180 pF
R8
1 kΩ
DIAG
23
5 ^VSS1
POWER STAGE
EN1
24
REL1
22
SW1
21
BOOT1
3
OUT1
4
C33
15 nF
VSSD
LIM
17 _{1, 12, 18, 20}
R14
5.6 Ω
C34
n.c.
560 pF
C25
560 pF
R13
5.6 Ω
L1
bead
L2
Sumida 33 µH
CDRH127- 330
C36
470 nF
C29
C28 ^{100 nF}
100
nF
C30
100 nF
VDDD
C31
1500 µF
(35 V)
C32
1500 µF
(35 V)
VSSD
C37
470 nF
L3 ^{Sumida 33 µH}
bead CDRH127-330
L4
R15
5.6 Ω
C35
560 pF
R4
10 kΩ
C9
1 nF
R5
10 kΩ
R6
10 kΩ
C10
1 nF
R7
10 kΩ
input 1
J1
QGND
J3
J2
VSS
input 2
J4
QGND
inputs
QGND
C16
1 nF
+25 V
GND
−25 V
VDD
1
2
3
VSS
QGND
C17
1 nF
QGND
L5
bead
R9
10 kΩ
R10
9.1 kΩ
bead
L6
L7
bead R11
5.6 Ω
VDDD
VSSD
C18
100 nF
C19
100 nF
C20
100 nF
C21
100 nF
power supply
VDDD VSSD
VDDA
C22
47 µF
(35 V)
GND
C23
47 µF
(35 V)
VSSA
MGW232
QGND
C40
1 nF
R16
5.6 Ω
C41
1 nF
OUT2−
1
2
OUT2+
4 or 8 Ω
SE
C38
220 nF
QGND
GND
C39
220 nF
QGND
R17
5.6 Ω
C42
1 nF
C43
1 nF
OUT2−
2
1
OUT1+
OUT1−
2
1
OUT1+
8Ω
BTL
4 or 8 Ω
SE
QGND
outputs
R9 and R10 are only necessary in BTL applications with asymmetrical supply.
BTL: remove R6, R7, C4, C7 and C8 and close J5 and J6.
Demodulation coils L2 and L4 should be matched in BTL.
Inputs floating or inputs referenced to QGND (close J1 and J4) or referenced to V_SS (close J2 and J3).
Fig.14 Two-chip class-D audio amplifier application diagram for TDA8926TH or TDA8927TH and TDA8929T.