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A4989 Datasheet Dual Full-Bridge MOSFET Driver

Manufacturer: Allegro MicroSystems

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General Description

The A4989 is a dual full-bridge gate driver with integrated microstepping translator suitable for driving a wide range of higher power industrial bipolar two-phase stepper motors (typically 30 to 500 W).

Motor power is provided by external N-channel power MOSFETs at supply voltages from 12 to 50 V.

This device contains two sinusoidal DACs that generate the reference voltage for two separate fixed off-time PWM current controllers.

Overview

A4989 Dual Full-Bridge MOSFET Driver with Microstepping Translator.

Key Features

  • 2-wire step and direction interface.
  • Dual full-bridge gate drive for N-channel MOSFETs.
  • Operation over 12 to 50 V supply voltage range.
  • Synchronous rectification.
  • Cross-conduction protection.
  • Adjustable mixed decay.
  • Integrated sinusoidal DAC current reference.
  • Fixed off-time PWM current control.
  • Enhanced low current control when microstepping.
  • Pin compatible with the A3986.

More Datasheets from Allegro MicroSystems

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