TDA8927 Philips Semiconductors, TDA8927 Datasheet - Page 20

• Manufacturer Part Number: TDA8927
• Description: Power stage 2 x 80 W class-D audio amplifier
• Manufacturer: Philips Semiconductors

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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
1 F
C5
QGND
(5.6 V)
input 1
D1
R4
10 k
V DDA
GND
1 nF
C9
J1
1 F
R1
30 k
C6
mute
V SS
on
off
mode select
R5
10 k
J2
V SSA
J5
J6
J3
1 F
39 k
C7
R2
S1
Fig.11 Two-chip class-D audio amplifier application diagram for TDA8926TH or TDA8927TH and TDA8929T.
GND
inputs
R6
10 k
330 pF
330 pF
220 nF
27 k
1 nF
C10
J4
R3
C2
1 F
C1
220 nF
C3
C4
C8
input 2
QGND
V DDA
SGND1
SGND2
MODE
R7
10 k
OSC
IN1
IN1
IN2
IN2
V DD1
6
7
2
11
5
4
8
9
3
V DD2
CONTROLLER
GND
TDA8929T
C11
C12
10
25 V
25 V
n.c.
U2
15
100 nF
100 nF
12
V SS2
V DD
V SS
1
2
3
1 nF
1 nF
C16
C17
1
17
13
14
16
19
18
22
21
23
24
20
QGND
QGND
V SS1
PWM2
SW2
REL2
EN2
STAB
V SSD
DIAGCUR
EN1
REL1
SW1
PWM1
QGND
V SSA
R9
10 k
R10
9.1 k
C13
100 nF
C15
180 pF
bead
bead
L5
L6
V SSA
V SSD
200 k
(7.5 V)
D2
1 k
R18
R8
V SSD
V SSD
bead
V DDD
V SSD
L7
100 nF
V DDD
C14
SS
POWERUP
V SS(sub)
5.6
R11
(close J2 and J3).
REL2
STAB
STAB
DIAG
REL1
SW2
SW1
EN2
EN1
LIM
16
15
13
14
power supply
19
6
7
23
24
22
21
17
C18
100 nF
C20
100 nF
POWER STAGE
TDA8926TH
TDA8927TH
1, 12, 18, 20
U1
or
n.c.
C19
100 nF
C21
100 nF
10
11
9
2
8
5
3
4
C22
47 F
(35 V)
C23
47 F
(35 V)
OUT2
V DD1
V DD2
V SS2
V SS1
OUT1
BOOT2
BOOT1
100 nF
560 pF
560 pF
5.6
5.6
C27
C24
C34
V DDA
V SSA
R12
R14
GND
C33
15 nF
V DDD
V DDD V SSD
C26
15 nF
MGW232
V SSD
C28
100
nF
R13
5.6
R15
5.6
C25
560 pF
C35
560 pF
C29
100 nF
C30
100 nF
bead
bead
L1
L3
CDRH127-330
CDRH127-330
Sumida 33 H
Sumida 33 H
C31
1500 F
(35 V)
C32
1500 F
(35 V)
L2
L4
V DDD
V SSD
470 nF
470 nF
C36
C37
R16
5.6
R17
5.6
C38
220 nF
C39
220 nF
1 nF
1 nF
1 nF
1 nF
C40
C41
C42
C43
QGND
QGND
QGND
QGND
GND
OUT2
OUT2
OUT2
OUT1
OUT1
OUT1
1
2
2
1
2
1
outputs
4 or 8
4 or 8
BTL
8
SE
SE