Data Sheet

DMOS Microstepping Driver with Translator
and Overcurrent Protection
A4988
16
Allegro MicroSystems, Inc.
115 Northeast Cutoff
Worcester, Massachusetts 01615-0036 U.S.A.
1.508.853.5000; www.allegromicro.com
Figure 12. Decay Modes for Sixteenth-Step Increments
MixedSlow
Mixed*
Mixed*
MixedSlow
MixedSlow Slow
Slow
100.00
95.69
88.19
83.15
–83.15
77.30
70.71
63.44
55.56
47.14
38.27
29.03
19.51
9.8
0.00
–100.00
–95.69
–88.19
–77.30
–70.71
–63.44
–55.56
–47.14
–38.27
–29.03
–19.51
–9.8
100.00
95.69
88.19
83.15
–83.15
77.30
70.71
63.44
55.56
47.14
38.27
29.03
19.51
9.8
0.00
–100.00
–95.69
–88.19
–77.30
–70.71
–63.44
–55.56
–47.14
–38.27
–29.03
–19.51
–9.8
Phase 2
I
OUT2B
Direction = H
(%)
Phase 1
I
OUT1A
Direction = H
(%)
Home Microstep Position
Mixed
*With ROSC pin tied to GND
STEP
DIR= H