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A5977 Datasheet Microstepping DMOS Driver

Manufacturer: Allegro MicroSystems

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General Description

The A5977 is a complete microstepping motor driver with built-in translator.

It is designed to operate bipolar stepper motors in full-, half-, quarter-, and eighth-step modes, with output drive capability of 40 V and ±2.8 A.

The A5977 includes a fixed off-time current regulator that has the ability to operate in slow-, fast-, or mixed-decay modes.

Overview

A5977 Microstepping DMOS Driver with Translator.

Key Features

  • ±2.8 A, 40 V output rating.
  • Low RDS(on) outputs, 0.22 Ω source, 0.15 Ω sink typical.
  • Automatic current decay mode detection/selection.
  • 3 to 5.5 V logic supply voltage range.
  • Mixed, fast, and slow current decay modes.
  • Home output.
  • Synchronous rectification for low power dissipation.
  • Internal UVLO and thermal shutdown circuitry.
  • Crossover-current protection.
  • Short-to-ground protection.
  • Short-to-VBB.

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