Data Sheet

DMOS Microstepping Driver with Translator
and Overcurrent Protection
A4988
15
Allegro MicroSystems, Inc.
115 Northeast Cutoff
Worcester, Massachusetts 01615-0036 U.S.A.
1.508.853.5000; www.allegromicro.com
Figure 11. Decay Modes for Eighth-Step Increments
Mixed
Mixed
Slow
Slow
Mixed Slow Mixed Slow
0.00
100.00
92.39
70.71
55.56
–55.56
83.15
–83.15
38.27
19.51
–19.51
–38.27
–70.71
–92.39
–100.00
0.00
100.00
92.39
70.71
55.56
–55.56
83.15
–83.15
38.27
19.51
–19.51
–38.27
–70.71
–92.39
–100.00
Phase 2
I
OUT2B
Direction = H
(%)
Phase 1
I
OUT1A
Direction = H
(%)
Home Microstep Position
STEP
Mixed*
Mixed*
*With ROSC pin tied to GND
DIR= H