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A3973 - Dual DMOS Full-Bridge Microstepping PWM Motor Driver

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General Description

Designed for pulse-width modulated (PWM) current control of bipolar microstepping stepper motors, the A3973 is capable of continuous output currents to ±1 A and operating voltages to 35 V.

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

Overview

A3973 Dual DMOS Full-Bridge Microstepping PWM Motor Driver Discontinued Product This device is no longer in production.

The device should not be purchased for new design applications.

Samples are no longer available.

Key Features

  • ±1 A, 35 V Continuous Output Rating.
  • Low RDS(on) DMOS Output Drivers.
  • Optimized Microstepping via 6-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 Protection.
  • Precision 2 V Reference.
  • Inputs Compatible with 3.3 or.

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