A3979SLP-T Allegro Microsystems Inc, A3979SLP-T Datasheet - Page 12

• Manufacturer Part Number: A3979SLP-T
• Description: IC, SM MOTOR DRIVER 2.5A TSSOP-28
• Manufacturer: Allegro Microsystems Inc

Specifications of A3979SLP-T

• Driver Ic Type: Microstepping DMOS Driver With Translator
• Voltage, Output Max: 35V
• Current, Output Max: 2.5A
• Temp, Op. Min: -20(degree C)
• Temp, Op. Max: 85(degree C)
• Pins, No. Of: 28
• Case: RoHS Compliant
• Applications: Stepper Motor Driver
• Number Of Outputs: 1
• Current - Output: ±2.5A
• Voltage - Load: 8 V ~ 35 V
• Voltage - Supply: 3 V ~ 5.5 V
• Operating Temperature: -20°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 28-TSSOP Exposed Pad, 28-eTSSOP, 28-HTSSOP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: 620-1080

A3979
Table 2. Step Sequencing Settings
Home microstep position at Step Angle 45º; DIR = H; 360° = 4 full steps
Step
Full
#
1
2
Step
Half
#
1
2
3
4
Step
1/4
#
1
2
3
4
5
6
7
8
Step
1/16
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
#
1
2
3
4
5
6
7
8
9
[% I tripMax ]
Phase 1
Current
100.00
–19.51
–29.03
–38.27
–47.14
–55.56
–63.44
–70.71
–77.30
–83.15
–88.19
–92.39
–95.69
–98.08
–99.52
99.52
98.08
95.69
92.39
88.19
83.15
77.30
70.71
63.44
55.56
47.14
38.27
29.03
19.51
–9.80
9.80
0.00
(%)
DMOS Microstepping Driver with Translator
[% I tripMax ]
Phase 2
Current
100.00
19.51
29.03
38.27
47.14
55.56
63.44
70.71
77.30
83.15
88.19
92.39
95.69
98.08
99.52
99.52
98.08
95.69
92.39
88.19
83.15
77.30
70.71
63.44
55.56
47.14
38.27
29.03
19.51
0.00
9.80
9.80
(%)
Angle
101.3
106.9
123.8
129.4
135.0
140.6
146.3
151.9
157.5
163.1
168.8
174.4
112.5
118.1
Step
16.9
22.5
28.1
33.8
39.4
45.0
50.6
56.3
61.9
67.5
73.1
78.8
84.4
90.0
95.6
11.3
0.0
5.6
(º)
Step
Full
#
3
4
Step
Half
#
5
6
7
8
Step
1/4
10
12
13
14
15
16
11
#
9
Step
1/16
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
#
115 Northeast Cutoff, Box 15036
Allegro MicroSystems, Inc.
Worcester, Massachusetts 01615-0036 [phone]
www.allegromicro.com
[% I tripMax ]
Phase 1
Current
–100.00
–99.52
–98.08
–95.69
–92.39
–88.19
–83.15
–77.30
–70.71
–63.44
–55.56
–47.14
–38.27
–29.03
–19.51
–9.80
19.51
29.03
38.27
47.14
55.56
63.44
70.71
77.30
83.15
88.19
92.39
95.69
98.08
99.52
0.00
9.80
(%)
[% I tripMax ]
Phase 2
Current
–100.00
–19.51
–29.03
–38.27
–47.14
–55.56
–63.44
–70.71
–77.30
–83.15
–88.19
–92.39
–95.69
–98.08
–99.52
–99.52
–98.08
–95.69
–92.39
–88.19
–83.15
–77.30
–70.71
–63.44
–55.56
–47.14
–38.27
–29.03
–19.51
–9.80
–9.80
0.00
(%)
Angle
180.0
185.6
191.3
196.9
202.5
208.1
213.8
219.4
225.0
230.6
236.3
241.9
247.5
253.1
258.8
264.4
270.0
275.6
281.3
286.9
292.5
298.1
303.8
309.4
315.0
320.6
326.3
331.9
337.5
343.1
348.8
354.4
Step
(º)
12