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A4988 Datasheet(PDF) 14 Page - Allegro MicroSystems |
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A4988 Datasheet(HTML) 14 Page - Allegro MicroSystems |
14 / 19 page ![]() DMOS Microstepping Driver with Translator and Overcurrent Protection A4988 14 Allegro MicroSystems, Inc. 115 Northeast Cutoff Worcester, Massachusetts 01615-0036 U.S.A. 1.508.853.5000; www.allegromicro.com 4988-DS Figure 9. Decay Modes for Half-Step Increments Figure 8. Decay Mode for Full-Step Increments Phase 2 I OUT2A Direction = H (%) Phase 1 I OUT1A Direction = H (%) STEP 100.00 70.71 –70.71 0.00 –100.00 100.00 70.71 –70.71 0.00 –100.00 Slow Slow *With ROSC pin tied to GND 100.00 70.71 –70.71 0.00 –100.00 100.00 70.71 –70.71 0.00 –100.00 Phase 2 I OUT2B Direction = H (%) Phase 1 I OUT1A Direction = H (%) STEP Slow Mixed Mixed* Mixed* Slow Mixed Slow Mixed Mixed Slow Mixed Slow Mixed Slow Slow 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 I OUT2B Direction = H (%) Phase 1 I OUT1A Direction = H (%) Slow Mixed Slow Slow Mixed Slow Mixed Slow Mixed Mixed STEP Slow Mixed* Mixed* *With ROSC pin tied to GND Figure 10. Decay Modes for Quarter-Step Increments DIR= H DIR= H DIR= H |
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