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