A3955
Full-Bridge PWM Microstepping Motor Driver
Table 4 — Step Sequencing
Bridge A
Full
Step
1
Half
Step
1
Quarter Eighth
Step
Step
1
2
2
3
4
2
3
5
6
4
7
8
3
5
9
10
6
11
12
4
7
13
14
8
15
16
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
PHASE
A
H
H
H
H
X
L
L
L
L
L
L
L
L
L
L
L
L
L
L
L
X
H
H
H
H
H
H
H
H
H
H
H
D
2A
H
L
L
L
L
L
L
L
H
H
H
H
H
H
H
H
H
L
L
L
L
L
L
L
H
H
H
H
H
H
H
H
D
1A
L
H
H
L
L
L
H
H
L
L
H
H
H
H
H
L
L
H
H
L
L
L
H
H
L
L
H
H
H
H
H
L
D
0A
L
H
L
H
L
H
L
H
L
H
L
H
H
H
L
H
L
H
L
H
L
H
L
H
L
H
L
H
H
H
L
H
I
LOADA
70.7%
55.5%
38.2%
19.5%
0%
-19.5%
-38.2%
-55.5%
-70.7%
-83.1%
-92.4%
-100%
-100%
-100%
-92.4%
-83.1%
-70.7%
-55.5%
-38.2%
-19.5%
0%
19.5%
38.2%
55.5%
70.7%
83.1%
92.4%
100%
100%
100%
92.4%
83.1%
PHASE
B
H
H
H
H
H
H
H
H
H
H
H
H
X
L
L
L
L
L
L
L
L
L
L
L
L
L
L
L
X
H
H
H
D
2B
H
H
H
H
H
H
H
H
H
L
L
L
L
L
L
L
H
H
H
H
H
H
H
H
H
L
L
L
L
L
L
L
Bridge B
D
1B
L
L
H
H
H
H
H
L
L
H
H
L
L
L
H
H
L
L
H
H
H
H
H
L
L
H
H
L
L
L
H
H
D
0B
L
H
L
H
H
H
L
H
L
H
L
H
L
H
L
H
L
H
L
H
H
H
L
H
L
H
L
H
L
H
L
H
I
LOADB
70.7%
83.1%
92.4%
100%
100%
100%
92.4%
83.1%
70.7%
55.5%
38.2%
19.5%
0%
-19.5%
-38.2%
-55.5%
-70.7%
-83.1%
-92.4%
-100%
-100%
-100%
-92.4%
-83.1%
-70.7%
-55.5%
-38.2%
-19.5%
0%
19.5%
38.2%
55.5%
Allegro MicroSystems, Inc.
115 Northeast Cutoff
Worcester, Massachusetts 01615-0036 U.S.A.
1.508.853.5000; www.allegromicro.com
11
ALLEGRO [ ALLEGRO MICROSYSTEMS ]
