Description

The A4979 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 50 V and 1.5 A. The A4979 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 features and to read diagnostic information.

Features and Benefits

• Typical application up to 1.5 A, 50 V

• Stall detect features

• Low R

DS(on)outputs, 0.5 Ωsource and sink, typical

• Automatic current decay mode detection/selection

• Mixed, Fast, and Slow current decay modes

• Synchronous rectification for low power dissipation

• Internal UVLO and Thermal Shutdown circuitry

• Crossover-current protection

• Short circuit and open load diagnostics

• Hot and cold thermal warning

• SPI-compatible or simple Step and Direction motion control

• Highly configurable via SPI-compatible serial interface

Applications

• Industrial stepper motor drives

• Printers

• Textile machines