8-2
8-2
A
B
C
D
E
F
G
H
1
2
3
4
5
IN1
IN1
FB1
DTC1
REF
IN2
SCP
OUT1
3
4
5
6
16
14
15
7
IC30
PWM
POWER CONTROL
IC32
SHUNT
REGULATOR
1
8
INVERTER
INVERTER
Q10
Q11, 12
Q13-16
5-A29
5-B29
D5V
D5V
Q17, 18
POWER SW
D31
PROTECTOR
IN1
IN1
FB1
REF
DTC1
DTC2
SCP
IN2
IN2
OUT1
OUT2
FB2
3
4
5
16
6
11
15
14
13
7
10
12
IC31
PWM
POWER CONTROL
D25
–5V
REGULATOR
INVERTER
INVERTER
Q20
Q21, 22
Q23-26
Q28-31
BUFFER
5-A7
5-B7
+6V
+6V
Q27, 37
POWER SW
D33
PROTECTOR
D32
PROTECTOR
BUFFER
BUFFER
D20
FLYWHEEL
IC20
+5V REG
IC33
SHUNT
REGULATOR
1
8
D26, 29
FLYWHEEL
FLY
WHEEL
Q27, 28
Q32
POWER SW
5-A6
5-B6
–6V
–6V
IC21
–5V REG
IC22
–5V REG
3.3V
1.2V
–2V
5V-2
1
1
3
3
2
2
–5V
–5V-2
3
2
1
BHD (2/2)
8-2. BHD (2/2) BLOCK DIAGRAM
PWM CONTROL, REGULATOR
BHD (2/2) BLOCK