TDA8927 Philips Semiconductors, TDA8927 Datasheet - Page 18

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

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R21 and R22 are only necessary in BTL applications with asymmetrical supply.
BTL: remove R6, R7, C23, C26 and C27 and close J5 and J6.
C22 and C23 influence the low-pass frequency response and should be tuned with the real load (loudspeaker).
Inputs floating or inputs referenced to QGND (close J1 and J4) or referenced to V
470 nF
C25
QGND
(5.6 V)
input 1
D1
R5
10 k
V DDA
470 nF
GND
1 nF
C28
J1
C24
R19
39 k
mute
V SS
on
off
mode select
R4
10 k
J2
V SSA
470 nF
J5
J6
J3
Fig.9 Two-chip class-D audio amplifier application diagram for TDA8926J or TDA8927J and TDA8929T.
C26
39 k
R20
S1
GND
inputs
R6
10 k
330 pF
330 pF
470 nF
220 nF
27 k
1 nF
C29
J4
R1
C3
C22
C23
C27
C44
220 nF
QGND
input 2
SGND1
SGND2
V DDA
MODE
R7
10 k
OSC
IN2
IN2
IN1
IN1
V DD1
6
7
2
11
5
4
8
9
3
GND
V DD2
CONTROLLER
25 V
25 V
TDA8929T
10
C1
C2
n.c.
15
U2
V DD
V SS
220 nF
220 nF
12
1
2
3
1 nF
1 nF
C30
C31
V SS2
QGND
QGND
1
17
13
14
16
19
18
22
21
23
24
20
V SS1
STAB
V SSD
PWM2
SW2
REL2
EN2
DIAGCUR
EN1
REL1
SW1
PWM1
V SSA
R21
10 k
R22
9.1 k
bead
bead
C4
220 nF
C43
180 pF
L5
L6
V SSA V SSD
C32
220 nF
C33
220 nF
SS
R10
1 k
200 k
(7.5 V)
D2
R24
(close J2 and J3) for an input signal ground reference.
bead
L7
V DDD
220 nF
C34
1500 F
(35 V)
C35
1500 F
(35 V)
POWERUP
C5
REL2
STAB
DIAG
REL1
SW2
EN2
SW1
EN1
V DDD
V SSD
17
16
14
15
9
3
4
2
1
POWER STAGE
power supply
TDA8926J
TDA8927J
C36
220 nF
C38
220 nF
U1
or
C37
220 nF
C39
220 nF
12
13
10
11
5
8
6
7
OUT2
V DD1
V DD2
V SS2
V SS1
OUT1
BOOT2
BOOT1
C40
47 F
(35 V)
C41
47 F
(35 V)
220 nF
560 pF
560 pF
5.6
5.6
C10
C12
R11
R13
C7
C9
15 nF
V DDD
C8
15 nF
V DDD
V DDA
V SSA
GND
V SSD
V SSD
C6
220 nF
MLD633
R12
5.6
R14
5.6
C11
560 pF
C13
560 pF
Sumida 33 H
CDRH127-330
Sumida 33 H
CDRH127-330
V DDD
V SSD
L2
L4
470 nF
470 nF
C14
C16
R15
24
R16
24
C15
220 nF
C17
220 nF
1 nF
1 nF
1 nF
1 nF
C18
C19
C20
C21
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