MAIN BOARD
TABLE OF CONTENTS
Internal IC Diagram ......................................................... 7-1
Circuit Diagram ................................................................ 7-2
PCB Layout Top View ...................................................... 7-3
PCB Layout Bottom View ................................................ 7-4
Electrical Parts list ........................................................... 7-6
7-1
7-1
TC4053 INTERNAL IC DIAGRAM
TDA8920 INTERNAL IC DIAGRAM
OUT c IN
OUT c IN
OUT c IN
OUT c IN
OUT c IN
OUT c IN
X - COMMON
Z - COMMON
Y - COMMON
0X
1X
0Y
1Y
0Z
1Z
A
B
C
INH
11
16
11
9
6
8
14
12
13
2
1
5
3
4
15
Vcc
Vss
V
7
EE
OUT1
VSSP1
VDDP2
DRIVER
HIGH
MBL461
OUT2
BOOT2
TDA8920TH
BOOT1
DRIVER
LOW
RELEASE1
SWITCH1
ENABLE1
CONTROL
AND
HANDSHAKE
PWM
MODULATOR
MANAGER
OSCILLATOR
TEMPERATURE SENSOR
CURRENT PROTECTION
STABI
MODE
INPUT
STAGE
mute
9
8
IN1
−
IN1
+
22
21
20
17
16
15
VSSP2
VSSP1
DRIVER
HIGH
DRIVER
LOW
RELEASE2
SWITCH2
ENABLE2
CONTROL
AND
HANDSHAKE
PWM
MODULATOR
11
SGND1
7
OSC
2
SGND2
6
MODE
INPUT
STAGE
mute
5
4
IN2
−
IN2
+
19
24
VSSD
HW
1
VSSA2
12
VSSA1
3
VDDA2
10
VDDA1
23
13
18
14
VDDP2
PROT
STABI
VDDP1
