80
• MAIN Board
IC601 BA6287F
IC603 BA6780
IC604 SN74HC573BNS
1
2
3
4
OUT1
VM
VCC
FIN
8
7
6
5
GND
OUT2
VREF
RIN
CONTROL LOGIC
TSD
POWER
SAVE
DRIVER
DRIVER
VIN2
FIN2
RIN2
CT2
VEE
FBIN-
FBIN+
OUT2+
OUT2-
VIN1
FIN1
REVERSIBLE DRIVER
FWD/REV CONTROLLER
COVERNER DRIVER
FWD/REV CONTROLLER
COVERNER
LOAD CURRENT
DETECTION
AMPLIFIER
COVERNER
OUTPUT
REFERENCE
VOLTAGE OUTPUT
LOW VOLTAGE
OUTPUT
RIN1
IOUT
VEE
VEE
VCC
VREF
VREG
VCC
OUT1+
+-
OUT1-
18
17
16
15
1
2
3
4
5
6
7
8
9
14
13
12
11
10
IC605 SN74HC138ANS
IC608 M51953BFP
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
Q
OE
D0
D1
D2
D3
D4
D5
D6
D7
GND
OE
D
VCC
Q0
Q1
Q2
Q3
Q4
Q5
Q6
Q7
LE
G
Q
OE
D
G
Q
OE
D
G
Q
OE
D
G
Q
OE
D
G
Q
OE
D
G
Q
OE
D
G
Q
OE
D
G
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
GND
Y7
G1
G2B
G2A
C
B
A
A
B
C
G2A
Y7
G1
G2B
Y6
Y5
Y6
Y5
Y4
Y3
Y2
Y1
Y0
16
VCC
DATA OUTPUTS
OUTPUT
ENABLE
SELECT
Y4
Y3
Y2
Y1
Y0
REFERENCE
VOLTAGE
GND
4
ON/OFF
1
IN
3
OUT
5
REF
VOL
2
+
–
OVERHEAT
PROTECTION
OVERCURRENT
LIMITTER
27k
5k