DRV8886AT Datasheet, PDF (15/40 Pages) Texas Instruments – 2-A Stepper Motor Driver With Integrated Current Sense and AutoTune Technology

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DRV8886AT
SLVSDO1 – JANUARY 2017
NOTE
If the step mode is changed from full, 1/2, 1/4, 1/8, or 1/16 to full, 1/2, 1/4, 1/8, or 1/16
while stepping, the indexer advances to the next valid state for the new step mode setting
at the rising edge of STEP. If the step mode is changed from or to noncircular 1/2 step the
indexer goes immediately to the valid state for that mode.
The home state is an electrical angle of 45°. This state is entered after power-up, after exiting logic undervoltage
lockout, or after exiting sleep mode. Table 3 lists the home state in red.
FULL STEP
1
2
Table 3. Microstepping Relative Current Per Step (DIR = 1)
1/2 STEP
1
2
3
4
5
1/4 STEP
1
2
3
4
5
6
7
8
9
10
1/8 STEP
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
1/16 STEP
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
ELECTRICAL
ANGLE
(DEGREES)
0.000°
5.625°
11.250°
16.875°
22.500°
28.125°
33.750°
39.375°
45.000°
50.625°
56.250°
61.875°
67.500°
73.125°
78.750°
84.375°
90.000°
95.625°
101.250°
106.875°
112.500°
118.125°
123.750°
129.375°
135.000°
140.625°
146.250°
151.875°
157.500°
163.125°
168.750°
174.375°
180.000°
185.625°
191.250°
196.875°
202.500°
208.125°
AOUT
CURRENT (%
FULL-SCALE)
0%
10%
20%
29%
38%
47%
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%
–10%
–20%
–29%
–38%
–47%
BOUT
CURRENT (%
FULL-SCALE)
100%
100%
98%
96%
92%
88%
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%
–100%
–98%
–96%
–92%
–88%
Copyright © 2017, Texas Instruments Incorporated
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