Data Sheet

DMOS Microstepping Driver with Translator
and Overcurrent Protection
A4988
17
Allegro MicroSystems, Inc.
115 Northeast Cutoff
Worcester, Massachusetts 01615-0036 U.S.A.
1.508.853.5000; www.allegromicro.com
Table 2. Step Sequencing Settings
Home microstep position at Step Angle 45º; DIR = H
Full
Step
#
Half
Step
#
1/4
Step
#
1/8
Step
#
1/16
Step
#
Phase 1
Current
[% I
tripMax
]
(%)
Phase 2
Current
[% I
tripMax
]
(%)
Step
Angle
(º)
Full
Step
#
Half
Step
#
1/4
Step
#
1/8
Step
#
1/16
Step
#
Phase 1
Current
[% I
tripMax
]
(%)
Phase 2
Current
[% I
tripMax
]
(%)
Step
Angle
(º)
1121100.00 0.00 0.0 5 9 17 33 –100.00 0.00 180.0
2 99.52 9.80 5.6 34 –99.52 –9.80 185.6
2 3 98.08 19.51 11.3 18 35 –98.08 –19.51 191.3
4 95.69 29.03 16.9 36 –95.69 –29.03 196.9
2 3 5 92.39 38.27 22.5 10 19 37 –92.39 –38.27 202.5
6 88.19 47.14 28.1 38 –88.19 –47.14 208.1
4 7 83.15 55.56 33.8 20 39 –83.15 –55.56 213.8
8 77.30 63.44 39.4 40 –77.30 –63.44 219.4
1235970.71 70.71 45.0 3 6 11 21 41 –70.71 –70.71 225.0
10 63.44 77.30 50.6 42 –63.44 –77.30 230.6
6 11 55.56 83.15 56.3 22 43 –55.56 –83.15 236.3
12 47.14 88.19 61.9 44 –47.14 –88.19 241.9
4 7 13 38.27 92.39 67.5 12 23 45 –38.27 –92.39 247.5
14 29.03 95.69 73.1 46 –29.03 –95.69 253.1
8 15 19.51 98.08 78.8 24 47 –19.51 –98.08 258.8
16 9.80 99.52 84.4 48 –9.80 –99.52 264.4
3 5 9 17 0.00 100.00 90.0 7 13 25 49 0.00 –100.00 270.0
18 –9.80 99.52 95.6 50 9.80 –99.52 275.6
10 19 –19.51 98.08 101.3 26 51 19.51 –98.08 281.3
20 –29.03 95.69 106.9 52 29.03 –95.69 286.9
6 11 21 –38.27 92.39 112.5 14 27 53 38.27 –92.39 292.5
22 –47.14 88.19 118.1 54 47.14 –88.19 298.1
12 23 –55.56 83.15 123.8 28 55 55.56 –83.15 303.8
24 –63.44 77.30 129.4 56 63.44 –77.30 309.4
2 4 7 13 25 –70.71 70.71 135.0 4 8 15 29 57 70.71 –70.71 315.0
26 –77.30 63.44 140.6 58 77.30 –63.44 320.6
14 27 –83.15 55.56 146.3 30 59 83.15 –55.56 326.3
28 –88.19 47.14 151.9 60 88.19 –47.14 331.9
8 15 29 –92.39 38.27 157.5 16 31 61 92.39 –38.27 337.5
30 –95.69 29.03 163.1 62 95.69 –29.03 343.1
16 31 –98.08 19.51 168.8 32 63 98.08 –19.51 348.8
32 –99.52 9.80 174.4 64 99.52 –9.80 354.4