Fig.5 – Philips TDA8928J User Manual
Page 13
2004
May
05
13
Philips Semiconductors
Preliminar
y specification
P
o
w
er stage 2 x 10 or 1 x 20 W class-D
audio amplifier
TD
A8928J
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mgx380
C24
1
µ
F
C25
1
µ
F
C10
220
nF
C8
C9
220 nF
22
µ
F
(100 V)
R26
0
Ω
220 nF
C34
220
nF
C32
470
nF
C12
15
nF
LS1
8
Ω
LS2
8
Ω
R22
22
Ω
C28
100
nF
C27
22
µ
F (100 V)
R19
5.6
Ω
C28
560 pF
C29
560 pF
C30
560 pF
C31
560 pF
V
SSP
R30
39 k
Ω
L3
33
µ
H
L4
33
µ
H
U1
TDA8928J
R31
39 k
Ω
1
7
6
9
12
11
5
13
8
10
2
15
3
4
14
16
17
V
SSP
V
DDP
V
DDP
V
DDP
V
DDP
C35
220
nF
C33
470
nF
C13
15
nF
R23
22
Ω
R21
5.6
Ω
C11
220 nF
C38
100 nF
S1
power-ON
C37
220 pF
STAB (U1,9)
STAB (U1,9)
DZ2
3.3 V
DZ1
36 V
R24
R16
1 k
Ω
R10
0
Ω
C17
C15
100 nF
22
µ
F
(100 V)
C14
22
µ
F (100 V)
C16
100 nF
R28
0
Ω
R29
0
Ω
R4
1 k
Ω
R35
R34
3.9 k
Ω
R2
10 k
Ω
150
Ω
R8
3.9 k
Ω
R6
220 k
Ω
C22
2.2 nF
C42
2.2 nF
R32
100
Ω
C39
2.2 nF
C41
47 nF
R7
3.9 k
Ω
C40
47 nF
In1
In2
C21
2.2 nF
R13
15 k
Ω
R9
1 k
Ω
R33
3.9
k
Ω
R1
10 k
Ω
R14
15 k
Ω
R25
2 k
Ω
R15
10 k
Ω
R17
5.6 k
Ω
R12
2 k
Ω
R11
2 k
Ω
Q2
BC856
Q1
BC848
0
Ω
C6
470
µ
F
(35 V)
V
SSP
V
SSP
C7
470
µ
F
(35 V)
C5
V
DD1
V
DD2
V
SS1
V
SS2
V
SSP
V
SSP
V
DDP
V
DDP
V
DDP
U2A
LM393
1
2
8
4
3
U2B
LM393
7
5
6
V
SSP
V
SSP
V
SSP
J1
2
1
J3
2
1
J2
2
1
SW1
OUT1
BOOT1
STAB
BOOT2
OUT2
REL1
POWERUP
DIAG
EN1
EN2
REL2
SW2
R5
220 k
Ω
R3
1 k
Ω
C20
2.2 nF
C19
2.2 nF
C1
100 nF
+
14.5 V
−
14.5 V
CON1
supply
1
2
3
C2
100 nF
C3
470
µ
F
(35 V)
L1
bead
bead
L2
V
DDP
V
SSP
C4
470
µ
F
(35 V)
Fig.5 Single-ended self oscillating class-D system application diagram for TDA8928J.