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3977 - MICROSTEPPING DMOS DRIVER WITH TRANSLATOR

Datasheet Summary

Description

Device Operation.

The A3977 is a complete microstepping motor driver with built in translator for easy operation with minimal control lines.

It is designed to operate bipolar stepper motors in full-, half-, quarterand eighth-step modes.

Features

  • ±2.5 A, 35 V Output Rating Low rDS(on) Outputs, 0.45 Ω Source, 0.36 Ω Sink Typical Automatic Current Decay Mode Detection/Selection 3.0 V to 5.5 V Logic Supply Voltage Range Mixed, Fast, and Slow Current Decay Modes Home Output Synchronous Rectification for Low Power Dissipation Internal UVLO and Thermal Shutdown Circuitry Crossover-Current Protection Always order by complete part number: Part Number A3977KED A3977KLP A3977SED A3977SED-T A39.

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Datasheet preview – 3977

Datasheet Details

Part number 3977
Manufacturer Allegro MicroSystems
File Size 569.24 KB
Description MICROSTEPPING DMOS DRIVER WITH TRANSLATOR
Datasheet download datasheet 3977 Datasheet
Additional preview pages of the 3977 datasheet.

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Full PDF Text Transcription

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3977 A3977xED (PLCC) LOAD SUPPLY 1 SENSE 1 ENABLE OUT 1A HOME GND GND GND SLEEP OUT 1B MICROSTEPPING DMOS DRIVER WITH TRANSLATOR The A3977xED and A3977xLP are complete microstepping motor drivers with built-in translator. They are designed to operate bipolar stepper motors in full-, half-, quarter-, and eighth-step modes, with output drive capability of 35 V and ±2.5 A. The A3977 includes a fixed off-time current regulator that has the ability to operate in slow-, fast-, or mixed-decay modes. This currentdecay control scheme results in reduced audible motor noise, increased step accuracy, and reduced power dissipation. The translator is the key to the easy implementation of the A3977.
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