Abstract
This research proposes methods for understanding the immunity performance of switching power supplies with an actual load against electromagnetic compatibility (EMC: EMI + EMS(immunity)) of switching power supplies. In the conventional immunity test of switching power supplies (IEC61000-4-4), since the test with a resistive load, there is no effect on the load, even if noise applied from the AC line is transmitted to the load side. However, since the load is usually an actual load, such as an electronic device (PC and other), malfunctions may occur depending on the magnitude of the noise transmitted to the load side. Therefore, in this study, the output voltage spectrum during the immunity test was measured, and the immunity was evaluated considering the effect on the actual load.
https://ror.org/04jvka613 
