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A4989 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 patible with the A3986

Related Allegro MicroSystems Datasheets

Part Number Description
A4980 Automotive Programmable Stepper Driver
A4982 DMOS Microstepping Driver
A4984 DMOS Microstepping Driver
A4985 DMOS Microstepping Driver
A4987 DMOS Dual Full-Bridge PWM Motor Driver

A4989 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...