LB1945D View Datasheet(PDF) - ON Semiconductor
Part Name
Description
Manufacturer
LB1945D Datasheet PDF : 9 Pages
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Truth Table
ENABLE
Low
Low
High
PHASE
High
Low
-
OUTA
High
Low
OFF
LB1945D
OUTA
Low
High
OFF
I1
Low
High
Low
High
I2
Low
Low
High
High
Output current
Vref/(10 × RE) = IOUT
Vref/(15 × RE) = IOUT × 2/3
Vref/(30 × RE) = IOUT × 1/3
0
Note: The output is turned off when ENABLE is high or in the I1 = I2 = high state.
Clockwise/counterclockwise Operating Sequence
2-phase excitation drive
Clockwise rotation
No.
0
1
2
3
PHASE1
0
1
1
0
OUTA
0
1
1
0
OUTA
1
0
0
1
PHASE2
0
0
1
1
Counterclockwise rotation
No.
PHASE1
0
0
1
1
2
1
3
0
OUTA
0
1
1
0
OUTA
1
0
0
1
PHASE2
1
1
0
0
IA1 = IA2 = IB1 = IB2 = 0
OUTB
OUTB
0
1
0
1
1
0
1
0
IA1 = IA2 = IB1 = IB2 = 0
OUTB
OUTB
1
0
1
0
0
1
0
1
Control Sequence
2-phase excitation
Phase A
NO
PH1
IA2
IA1
0
0
0
0
1
1
0
0
2
1
0
0
3
0
0
0
1-2 phase excitation - 1/2 step
Phase A
No.
PH1
IA2
IA1
0
0
0
0
1
0
0
1
2
*
1
1
3
1
0
1
4
1
0
0
5
1
0
1
6
*
1
1
7
0
0
1
Table 1
Current value
PH2
1
0
1
0
1
1
1
1
Table 2
Current value
PH2
1
*
2/3
0
0
0
2/3
0
1
*
2/3
1
0
1
2/3
1
ENABLE1 = ENABLE2 = 0
Phase B
IB2
IB1
Current value
0
0
1
0
0
1
0
0
1
0
0
1
ENABLE1 = ENABLE2 = 0
Phase B
IB2
IB1
Current value
1
1
0
0
1
2/3
0
0
1
0
1
2/3
1
1
0
0
1
2/3
0
0
1
0
1
2/3
No.7633-6/9
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