Sanyo PLC-XF46N - Page 105

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IC Block Diagrams
S1
S2
S2
S3
S1
M
5
6
1
4
8+B
2
10
LOGIC
VZ
INPUT
INPUT
ON/OFF
CONTROL
FORWARD (reverse) DRIVE
REVERSE (forward) DRIVE
BRAKING
S1=ON , OTHER=OFF
S2=ON , OTHER=OFF
S3=ON , OTHER=OFF
<FF>
110
110
LB1645N
LB1641
● LB1641 <Motor Driver, IC1601, IC1611>
LB1645N <Motor Driver, IC1621, IC1631>
–
+
+
–
+
–
V ref V cc
S T A RT UP
S T A RT =7.2 V
S TOP =6.7 V
B OOT
R
efere n ce =6.5 V
H i g h S i de
V ref = V o u t +5.8 V
U pper / l ower MO S
S
i m u l ta n eo u s l y O FF
H i g h S i de
dr
i v er
ON/O FF
C i rc u i t
R efere n ce
5.0 V ± 5%
V boot V B V G H V DD
232586
R/C
5
28
32 30
amp - amp OUT S / S
1
OC
L – V G L
2
OC
L +
3
G ND
P.
G ND
V OUT
C
L M V t h =
0.1~0.2
V
T S D
Q
R
3
V
1 V
2.45 V
L ow S i de
V ref =6.5 V
S
E rror amp
PWM C omp
100
º
C
150
º
C
L ow S i de
dr
i v er
4,26
18~21
11~14
U pper / l ower MO S
P re v e n t s i m u l ta n eo u s ON
9
16
O S C
f =2 50 k H z
● MD1222N <DC-DC Converter, IC8191>