A3977 Datasheet - Allegro

A3977 - Microstepping DMOS Driver

The A3977 is a complete microstepping motor driver with built-in translator. It is 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 .

A3977 Features

* ±2.5 A, 35 V output rating

* Low RDS(on) outputs, 0.28 Ω source, 0.22 Ω sink typical

* Automatic current decay mode detection/selection

* 3.0 to 5.5 V logic supply voltage range

* Mixed, fast, and slow current decay modes

* Home output

* Sync

A3977-Allegro.pdf