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