Description

The A3969 is designed to drive both windings of a two-phase bipolar stepper motor. The device includes two H-bridges capable of continuous output currents of ±650 mA and op er at ing voltages to 30 V. Motor winding current can be controlled by the internal fixed-fre quen cy, pulse-width modulated (PWM), current-control circuitry. The peak load current limit is set by the user’s selection of a reference voltage and current-sensing resistors.

Features and Benefits

▪ ±650 mA Continuous Output Current

▪ 30 V Output Voltage Rating

▪ Internal Fixed-Frequency PWM Current Control

▪ Satlington Sink Drivers

▪ User-Selectable Blanking Window

▪ Internal Ground-Clamp and Flyback Diodes

▪ Internal Thermal-Shutdown Circuitry

▪ Crossover-Current Protec tion and UVLO Pro tec tion