33
8
RST
9
GND
10
SW
11
REF
12
VCO
13
FB+
14
CO
15
EO
16
VC
7
DEL
6
BAL
5
VED
4
FB–
3
EO
2
CO
1
VE
DELAY
CIRCUIT
CURRENT
LIMITER
ON/OFF
CONTROL
VOLTAGE
REFERENCE
CURRENT
LIMITER
OVERHEAT
PROTECTION
— MAIN BOARD —
— JUNCTION BOARD —
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