Description

The A3987 is a complete microstepping motor driver with built-in translator for easy operation. It is designed to operate bipolar stepper motors in full, half, quarter, and sixteenth step modes, with output drive capability of 50 V and ±1.5 A. The A3987 includes a fixed off-time current regulator, which has the ability to operate in slow or mixed decay modes.

Features and Benefits

▪ Low RDS(on) outputs

▪ Short-to-ground protection

▪ Shorted load protection

▪ Automatic current decay mode detection/selection

▪ Mixed and slow current decay modes

▪ Synchronous rectification for low power dissipation

▪ Internal UVLO and thermal shutdown circuitry

▪ Crossover-current protection