A3979 datasheet(11/15 Pages) ALLEGRO

11 / 15 page

DMOS Microstepping Driver with Translator

A3979

Allegro MicroSystems, Inc.

115 Northeast Cutoff, Box 15036

Worcester, Massachusetts 01615-0036 (508) 853-5000

www.allegromicro.com

0.00

100.00

92.39

70.71

38.27

–38.27

–70.71

–92.39

–100.00

0.00

100.00

92.39

70.71

38.27

–38.27

–70.71

–92.39

–100.00

Phase 2

OUT2B

Direction = H

(%)

Phase 1

OUT1A

Direction = H

(%)

Slow

Mixed

Slow

Mixed

Slow

Mixed

Slow

Mixed

Slow

STEP Input

HOME Output

100.00

70.71

–70.71

0.00

–100.00

100.00

70.71

–70.71

0.00

–100.00

Phase 2

OUT2B

Direction = H

(%)

Phase 1

OUT1A

Direction = H

(%)

Slow

Mixed

Slow

Mixed

Slow

Mixed

Slow

Mixed

Slow

Mixed

Slow

STEP Input

HOME Output

Phase 2

OUT2A

Direction = H

(%)

Phase 1

OUT1A

Direction = H

(%)

STEP Input

100.00

70.71

–70.71

0.00

–100.00

100.00

70.71

–70.71

0.00

–100.00

Slow

HOME Output

Figure 4. Decay Modes for Quarter-Step Increments

Figure 3. Decay Modes for Half-Step Increments

Figure 2. Decay Mode for Full-Step Increments

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