A3979SLPTR-T Allegro Microsystems Inc, A3979SLPTR-T Datasheet - Page 12

• Manufacturer Part Number: A3979SLPTR-T
• Description: IC DRIVER MICROSTEPPING 28-TSSOP
• Manufacturer: Allegro Microsystems Inc

Specifications of A3979SLPTR-T

• 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
• Motor Type: DMOS
• No. Of Outputs: 2
• Output Current: 2.5A
• Output Voltage: 35V
• Supply Voltage Range: 3V To 5.5V
• Driver Case Style: TSSOP
• No. Of Pins: 28
• Operating Temperature Range: -20°C To +85°C
• Operating Current: 8mA
• Operating Temperature Classification: Commercial
• Package Type: TSSOP EP
• Operating Supply Voltage (min): 3V
• Operating Supply Voltage (typ): 5V
• Operating Supply Voltage (max): 5.5V
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant, Lead free / RoHS Compliant
• Other names: 620-1148-2; A3979SLPTR-T

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