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A4989 - Dual Full-Bridge MOSFET Driver

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.

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.

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Datasheet preview – A4989

Datasheet Details

Part number A4989
Manufacturer Allegro
File Size 1.07 MB
Description Dual Full-Bridge MOSFET Driver
Datasheet download datasheet A4989 Datasheet
Additional preview pages of the A4989 datasheet.

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Full PDF Text Transcription

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A4989 Dual Full-Bridge MOSFET Driver with Microstepping Translator FEATURES AND BENEFITS ▪ 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 PACKAGE: 38 pin TSSOP (suffix LD) Approximate footprint 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).
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