Susceptibility Modelling of SMPS Input Stage Under High Current Pulse Injection

This paper presents a model able to reproduce the behavior of switch-mode power supply (SMPS) under a high-level current pulse injected at its input. In fact, such injected current involves particular phenomena that component models manufacturer have not been considered. To improve the SMPS model, some components particular behaviors have to be analyzed. Saturation phenomena in common mode chokes and rectifier bridge reverse recovery are especially considered by modelling. These phenomena have been modelled thanks to current and impedance measurements and integrated in an electronic simulation software. Finally, common mode chokes and rectifier bridge new models improve simulation results in accordance with measurement.