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A4993 Datasheet Automotive Stepper Driver

Manufacturer: Allegro MicroSystems

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General Description

The A4993 is a flexible microstepping motor driver with integrated phase current control and a built-in translator for easy operation.

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

At power-on, the A4993 is configured to drive most small stepper motors with simple step input.

Key Features

  • Peak motor current up to 1.4 A at 28 V.
  • Low RDS(ON) outputs, 0.5 Ω source and sink typical.
  • Continuous operation at high ambient temperature.
  • 3.5 to 50 V supply operation.
  • Adaptive mixed current decay.
  • Synchronous rectification for low power dissipation.
  • Internal overvoltage and undervoltage lockout.
  • Hot warning and overtemperature shutdown.
  • Crossover-current protection.
  • Short-circuit, open-load diagnostic.

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