BUY UCN5801A https://www.utsource.net/itm/p/408802.html
BiMOS II LATCHED DRIVERS
Description：The UCN5801A is a universal stepper motor controller and driver IC which can operate three-phase and two-phase unipolar and bipolar stepper motors. As a monolithic IC, it has all the required circuitry to control the motor, including maximum current control, on-board oscillator, logic level translator, and necessary logic circuitry to control two or four phase motors. Feature： 1. Short-to-ground and thermal protection 2. Current limitation 3. Rotational direction, speed and acceleration can be controlled 4. Operating voltage from 5 to 40V 5. Variable frequency PWM chopping 6. On-board memory 7. Simple bus interface Application：Automotive, factory automation, robotics, medical equipment, instruments, and more. (For reference only)