ICL7667 is used as a power MOSFET drivers in stepper motor drive system

for increasing switching speed of the power MOSFET and realizing high-frequency chopping control stepper motor.First

study on the gate capacitance

switching time of the power MOSFET due to the problem of power MOSFET is not in cut-off or deep saturation.The results showed that the gate capacitance of the charge and discharge process affected the power MOSFET switching speed.Then introduce the method to increase the switching speed of the power MOSFET. Finally

ICL7667 is used as a power MOSFET driver to achieve a high-frequency chopping control stepper motor .Simulation and test results showed that:the drive circuit with voltage division by resistors in the frequency of not more than 20 kHz

power MOSFET can to be in cut-off or deep saturation;ICL7667 can guarantee that chopping frequency of 200 kHz

the power MOSFET can to be in cut-off or deep saturation. The chopping frequency of the drive circuit used ICL7667 is increased 10 times than the drive circuit with voltage division by resistors. After using the ICL7667

stepper motor can run correctly under control of high-speed chopping signal.