DRV8880_15 Datasheet, PDF (17/48 Pages) Texas Instruments – DRV8880 2-A Stepper Motor Driver With AutoTune™

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DRV8880
SLVSD18A – JUNE 2015 – REVISED JULY 2015
FULL
STEP
4
1/2 STEP
7
8
1
Table 2. Microstepping Relative Current Per Step (continued)
1/4 STEP
13
14
15
16
1
1/8 STEP
25
26
27
28
29
30
31
32
1
1/16 STEP
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
1
ELECTRICAL ANGLE
(°)
264.375°
270.000°
275.625°
281.250°
286.875°
292.500°
298.125°
303.750°
309.375°
315.000°
320.625°
326.250°
331.875°
337.500°
343.125°
348.750°
354.375°
360.000°
AOUT CURRENT
(% full-scale)
–100%
–100%
–100%
–98%
–96%
–92%
–88%
–83%
–77%
–71%
–63%
–56%
–47%
–38%
–29%
–20%
–10%
0%
BOUT CURRENT
(% full-scale)
–10%
0%
10%
20%
29%
38%
47%
56%
63%
71%
77%
83%
88%
92%
96%
98%
100%
100%
Non-circular 1/2–step operation is shown in Table 3. This stepping mode consumes more power than circular
1/2-step operation, but provides a higher torque at high motor rpm.
NON-CIRCULAR
1/2 STEP
1
2
3
4
5
6
7
8
Table 3. Non-Circular 1/2-Stepping Current
ELECTRICAL ANGLE
(°)
0°
45°
90°
135°
180°
225°
270°
315°
AOUT CURRENT
(% FULL-SCALE)
0
100
100
100
0
–100
–100
–100
BOUT CURRENT
(% FULL-SCALE)
100
100
0
-100
-100
-100
0
100
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