Description: PWM chopper type bipolar stepper motor driver IC 1. 9V-42V DC power supply 2. H bridge bipolar constant phase flow drive 3. the maximum 4.0A of the eight kinds of output current 4. the largest 32 subdivision of the 6 models are optional 5. input signal high speed photoelectric isolation 6. common-anodestandard single pulse interface 7. offline to maintain the function 8. semi closed enclosure can be adapted to a more stringent environment 9. to provide energy-saving semi-automatic current lock function 10. built-in temperature protection and over current protection.