FO-6700U
FO-67DL
5 – 14
ENABLE PHASE OUTA OUTB
LHHL
LLLH
H – OFF OFF
I0 I1 Output Current
L L Vref/ (10 x RE) = IOUT
H L Vref/ (15 x RE) = IOUT x 2/3
L H Vref/ (30 x RE) = IOUT x 1/3
HH 0
(11) Driver Block
Sending Motor Driver (IC7: LB1845) ---- 28-pin DIP
This IC driver at the sending motor at the constant current with the bipo-
lar, chopper system.
Fig. 4
—
+
—
+
—
+
—
+
—
+
—
+
—
+
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+
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+
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+
PHASE2
VREF2
ENABLE2
I02
I12
CURRENT CONTROL
BLOCK
SENSE2
E2
ONE
SHOT
RC2
OUTPUT
BLOCK
PHASE1
VREF1
ENABLE1
I01
I11
CURRENT CONTROL
BLOCK
E1
SENSE1
ONE
SHOT
RC1
TSD
D-GND
GND
OUT2A
OUT2B
OUT1A
OUT1B
VCC
28
671 8 9
25
26
24
22
23
3 2 27 11 15 16 12 13
20
21
19
17
18
OUTPUT
BLOCK
OUTPUT
BLOCK
OUTPUT
BLOCK
OUTPUT
BLOCK
OUTPUT
BLOCK
OUTPUT
BLOCK
OUTPUT
BLOCK
4
VBB
14
[Truth Table]
Note: When ENABLE = H or I0 = I1 = H, the output is in OFF state.
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