Application circuit design of Fuji IGBT smart module

1. The peripheral control circuit of the photocoupler drive circuit is mainly aimed at the weak current control part of the microcontroller control system. Since the IPM module is directly connected to the power distribution system, isolation devices must be used to isolate the IPM module from the weak current circuit of the control part. to protect the microcontroller control system. At the same time, the working status of the IPM module depends largely on correct, effective, and timely control signals. Therefore, designing an excellent optocoupler control circuit is also one of the keys to the normal operation of the IPM module. , as shown in Figure 2 below. Buffer circuit