Modeling Method Of Conducted EMI In DC/DC Switching Power Supply Module

Based on the circuit structure and working principle of DC/DC switching power supply, this paper analyzes its electromagnetic interference mechanism from the perspective of EMC three elements, including electromagnetic interference source and interference propagation path. Then, considering the fact that the DC/DC switching power supply module usually works in a combined state and it is difficult to obtain internal detailed information, a method of extracting key information by means of test and other methods is proposed, and a simulation model of the DC/DC switching power supply module is established according to the circuit topology structure, so as to realize the modeling and simulation analysis of the switching power supply board.