DRV8886AT Datasheet, PDF (16/40 Pages) Texas Instruments – 2-A Stepper Motor Driver With Integrated Current Sense and AutoTune Technology

DRV8886AT
SLVSDO1 – JANUARY 2017
www.ti.com
FULL STEP
3
4
Table 3. Microstepping Relative Current Per Step (DIR = 1) (continued)
1/2 STEP
6
7
8
1
1/4 STEP
11
12
13
14
15
16
1
1/8 STEP
20
21
22
23
24
25
26
27
28
29
30
31
32
1
1/16 STEP
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
ELECTRICAL
ANGLE
(DEGREES)
213.750°
219.375°
225.000°
230.625°
236.250°
241.875°
247.500°
253.125°
258.750°
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)
–56%
–63%
–71%
–77%
–83%
–88%
–92%
–96%
–98%
–100%
–100%
–100%
–98%
–96%
–92%
–88%
–83%
–77%
–71%
–63%
–56%
–47%
–38%
–29%
–20%
–10%
0%
BOUT
CURRENT (%
FULL-SCALE)
–83%
–77%
–71%
–63%
–56%
–47%
–38%
–29%
–20%
–10%
0%
10%
20%
29%
38%
47%
56%
63%
71%
77%
83%
88%
92%
96%
98%
100%
100%
Table 4 shows the noncircular 1/2–step operation. 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 4. Non-Circular 1/2-Stepping Current
AOUT CURRENT
(% FULL-SCALE)
0
100
100
100
0
–100
–100
–100
BOUT CURRENT
(% FULL-SCALE)
100
100
0
–100
–100
–100
0
100
ELECTRICAL ANGLE
(DEGREES)
0
45
90
135
180
225
270
315
16
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