3977 Datasheet | Allegro MicroSystems

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 plete 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. By...