Philips Semiconductors
Preliminary specification
Power stage 2 × 50 W class-D audio
amplifier
TDA8926
15.5 Reference design bill of material
Table 1 Two-chip class-D audio amplifier PCB (Version 2.1; 03-2001) for TDA8926J and TDA8929T (see
Figs 7 and 8)
COMPONENT
DESCRIPTION
Cinch input connectors
VALUE
COMMENTS
2 × Farnell: 152-396
In1 and In2
Out1, Out2, VDD
GND and VSS
,
supply/output connectors
2 × Augat 5KEV-02;
1 × Augat 5KEV-03
S1
on/mute/off switch
PCB switch Knitter ATE 1 E M-O-M
DBS17P package
U1
power stage IC
TDA8926J/27J
TDA8929T
33 µH
U2
controller IC
SO24 package
L2 and L4
L5, L6 and L7
C1 and C2
demodulation filter coils
power supply ferrite beads
supply decoupling capacitors for
2 × Sumida CDRH127-330
3 × Murata BL01RN1-A62
2 × SMD1206
220 nF/63 V
VDD to VSS of the controller
C3
C4
clock decoupling capacitor
220 nF/63 V
220 nF/63 V
SMD1206
SMD1206
12 V decoupling capacitor of the
controller
C5
12 V decoupling capacitor of the power 220 nF/63 V
stage
SMD1206
SMD1206
C6 and C7
supply decoupling capacitors for
DD to VSS of the power stage
220 nF/63 V
V
C8 and C9
bootstrap capacitors
snubber capacitors
15 nF/50 V
2 × SMD0805
4 × SMD0805
C10, C11,
560 pF/100 V
C12 and C13
C14 and C16
C15 and C17
demodulation filter capacitors
resonance suppress capacitors
470 nF/63 V
220 nF/63 V
2 × MKT
2 × SMD1206
4 × SMD0805
C18, C19,
common mode HF coupling capacitors 1 nF/50 V
C20 and C21
C22 and C23
input filter capacitors
input capacitors
330 pF/50 V
470 nF/63 V
2 × SMD1206
4 × MKT
C24, C25,
C26 and C27
C28, C29,
C30 and C31
common mode HF coupling capacitors 1 nF/50 V
2 × SMD0805
2 × SMD1206
C32 and C33
C34 and C35
power supply decoupling capacitors
power supply electrolytic capacitors
220 nF/63 V
1500 µF/35 V
2 × Rubycon ZL very low ESR (large
switching currents)
C36, C37,
analog supply decoupling capacitors
220 nF/63 V
4 × SMD1206
C38 and C39
C40 and C41
analog supply electrolytic capacitors
diagnostic capacitor
47 µF/35 V
180 pF/50 V
220 nF/63 V
BZX79C5V6
BZX79C7V5
27 kΩ
2 × Rubycon ZA low ESR
SMD1206
C43
C44
D1
mode capacitor
SMD1206
5.6 V Zener diode
DO-35
D2
7.5 V Zener diode
DO-35
R1
clock adjustment resistor
SMD1206
2002 Oct 10
18
NXP [ NXP ]
