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A3973 Datasheet Dual Dmos Full-bridge Microstepping Pwm Motor Driver

Manufacturer: Allegro MicroSystems

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. Date of status change: November 1, 2010 Remended Substitutions: For existing customer transition, and for new customers or new applications, refer to the A3992. NOTE: For detailed information on purchasing options, contact your local Allegro field applications engineer or sales representative. Allegro MicroSystems, Inc. reserves the right to make, from time to time, revisions to the anticipated product life cycle plan for a product to acmodate changes in production capabilities, alternative product availabilities, or market demand. The information included herein is believed to be accurate and reliable. However, Allegro MicroSystems, Inc. assumes no responsibility for its use; nor for any infringements of patents or other rights of third parties which may result from its use. Free Datasheet http://..

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

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.

More Datasheets from Allegro MicroSystems

Part Number Description
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A3973 Distributor