A3957SLB Allegro, A3957SLB Datasheet - Page 13

• Manufacturer Part Number: A3957SLB
• Description: Full Bridge PWM Motor Driver 5V 24-Pin SOIC W
• Manufacturer: Allegro
• Type: Full Bridge PWM Motor Driverr

Specifications of A3957SLB

• Package: 24SOIC W
• Operating Supply Voltage: 5 V
• Maximum Operating Current: 4 mA
• Operating Temperature: -20 to 85 °C

Step Step Step Step Step
3957
FULL-BRIDGE PWM
MICROSTEPPING
MOTOR DRIVER
Full
1
2
3
4
1
1
2
3
4
5
6
7
8
/
2
10
11
12
13
14
15
16
1
1
2
3
4
5
6
7
8
9
/
4
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
1
1
2
3
4
5
6
7
8
9
/
8
1
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
1
2
3
4
5
6
7
8
9
/
16
PHASE
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
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
L
L
L
L
L
L
L
L
L
L
L
L
L
L
L
L
X
A
D
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
L
L
L
L
L
L
L
L
L
L
L
L
L
L
L
L
L
L
L
L
L
L
L
L
L
L
3A
Table 4 — Step Sequencing
Bridge A
D
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
L
L
L
L
L
L
L
L
L
L
L
L
L
L
L
L
L
L
L
L
L
L
L
L
L
L
2A
D
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
L
L
L
L
L
L
L
L
L
L
L
L
L
L
L
L
L
L
L
L
L
L
L
L
L
L
1A
D
H
H
H
H
H
L
H
H
L
H
L
H
L
H
H
H
H
L
H
H
H
H
H
H
H
H
H
L
H
H
H
H
L
H
L
H
L
H
H
L
H
H
H
H
L
L
L
X
L
L
L
L
L
L
L
L
L
L
L
L
X
L
L
L
0A
I
-17.4%
-26.1%
-34.8%
-43.5%
-52.2%
-60.9%
-69.6%
-73.9%
-78.3%
-82.6%
-87.0%
-91.3%
-95.7%
-95.7%
-91.3%
-87.0%
-82.6%
-78.3%
-73.9%
-69.6%
-60.9%
-52.2%
-43.5%
-34.8%
-26.1%
-17.4%
95.7%
91.3%
87.0%
82.6%
78.3%
73.9%
69.6%
60.9%
52.2%
43.5%
34.8%
26.1%
17.4%
-100%
-100%
-100%
-100%
-100%
17.4%
26.1%
34.8%
43.5%
52.2%
60.9%
69.6%
73.9%
78.3%
82.6%
87.0%
91.3%
95.7%
LOAD A
100%
100%
100%
100%
100%
0%
0%
PHASE
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
X
X
L
L
L
L
L
L
L
L
L
L
L
L
L
L
L
L
L
L
L
L
L
L
L
L
L
L
L
L
L
L
L
B
D
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
L
L
L
L
L
L
L
L
L
L
L
L
L
L
L
L
L
L
L
L
L
L
L
L
L
L
3B
Bridge B
D
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
L
L
L
L
L
L
L
L
L
L
L
L
L
L
L
L
L
L
L
L
L
L
L
L
L
L
2B
D
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
L
L
L
L
L
L
L
L
L
L
L
L
L
L
L
L
L
L
L
L
L
L
L
L
L
L
1B
D
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
X
L
L
L
L
L
L
L
L
L
L
L
X
L
L
L
L
L
L
L
L
L
L
L
L
L
L
L
L
L
0B
I
-17.4%
-26.1%
-34.8%
-43.5%
-52.2%
-60.9%
-69.6%
-73.9%
-78.3%
-82.6%
-87.0%
-91.3%
-95.7%
-95.7%
-91.3%
-87.0%
-82.6%
-78.3%
-73.9%
-69.6%
-60.9%
-52.2%
-43.5%
-34.8%
-26.1%
-17.4%
17.4%
26.1%
34.8%
43.5%
52.2%
60.9%
69.6%
73.9%
78.3%
82.6%
87.0%
91.3%
95.7%
95.7%
91.3%
87.0%
82.6%
78.3%
73.9%
69.6%
60.9%
52.2%
43.5%
34.8%
26.1%
17.4%
-100%
-100%
-100%
-100%
-100%
LOAD B
100%
100%
100%
100%
100%
0%
0%
angle
Step
135
180
225
270
315
45
90
0