A3981 Datasheet Automotive Programmable Stepper Driver

Manufacturer: Allegro MicroSystems

A3981 automotive programmable stepper driver by Allegro MicroSystems - Datasheet Preview

Datasheet Details

Part number	A3981
Manufacturer	Allegro MicroSystems
File Size	2.88 MB
Description	Automotive Programmable Stepper Driver
Download	A3981 Download (PDF)

General Description

TheA3981 is a flexible microstepping motor driver with built-in translator for easy operation.

It is a single-chip solution, designed to operate bipolar stepper motors in full-, half-, quarter- and sixteenth-step modes, at up to 28 V and ±1.4 A.

The A3981 can be controlled by simple Step and Direction inputs, or through the SPI-compatible serial interface that also can be used to program many of the integrated

Overview

A3981 Automotive Programmable Stepper Driver.

Key Features

Peak motor current up to ±1.4 A, 28 V.
Low RDS(on) outputs, 0.5 Ω source and sink, typical.
Automatic current decay mode detection/selection.
Mixed, Fast, and Slow current decay modes.
Synchronous rectification for low power dissipation.
Internal OVLO, UVLO, and Thermal Shutdown circuitry.
Crossover-current protection.
Short-circuit and open-load diagnostics.
Hot and cold thermal warning.
Stall detect feat.

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