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A3992 Datasheet DMOS Dual Full-Bridge Microstepping PWM Motor Driver

Manufacturer: Allegro MicroSystems

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General Description

Designed for pulse width modulated (PWM) current control of bipolar microstepped stepper motors, the A3992 is capable of continuous output currents to ±1.5 A and operating voltages to 50 V.

Internal fixed off-time PWM current control timing circuitry can be programmed via the serial interface to operate in slow, fast, or mixed decay modes.

The desired load current level is set via the serial port with two six bit linear DACs in conjunction with a reference voltage.

Overview

A3992 DMOS Dual Full-Bridge Microstepping PWM Motor Driver.

Key Features

  • ±1.5 A, 50 V continuous output rating.
  • Low RDS(on) DMOS output drivers.
  • Short-to-ground protection.
  • Shorted load protection.
  • Optimized microstepping via six bit linear DACs.
  • Programmable mixed, fast, and slow current decay modes.
  • 4 MHz internal oscillator for digital timing.
  • Serial interface controls chip functions.
  • Synchronous rectification for low power dissipation.
  • Internal UVLO and thermal shutdown circuitry.
  • Crossover-current protectio.

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