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A3981 - Automotive Programmable Stepper Driver

Datasheet Summary

Description

TheA3981 is a flexible microstepping motor driver with built-in translator for easy operation.

It is a single-chip solution, designed to operate bipolar stepper motors in full-, half-, quarter- and sixteenth-step modes, at up to 28 V and ±1.4 A.

Features

  • Peak motor current up to ±1.4 A, 28 V.
  • Low RDS(on) outputs, 0.5 Ω source and sink, typical.
  • Automatic current decay mode detection/selection.
  • Mixed, Fast, and Slow current decay modes.
  • Synchronous rectification for low power dissipation.
  • Internal OVLO, UVLO, and Thermal Shutdown circuitry.
  • Crossover-current protection.
  • Short-circuit and open-load diagnostics.
  • Hot and cold thermal warning.
  • Stall detect feat.

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Datasheet preview – A3981

Datasheet Details

Part number A3981
Manufacturer Allegro
File Size 2.88 MB
Description Automotive Programmable Stepper Driver
Datasheet download datasheet A3981 Datasheet
Additional preview pages of the A3981 datasheet.

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Full PDF Text Transcription

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A3981 Automotive Programmable Stepper Driver FEATURES AND BENEFITS • Peak motor current up to ±1.4 A, 28 V • Low RDS(on) outputs, 0.
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