This is part 3 of 4 of RECOM’s EMC Webinar series which will focus on emissions of switched mode power supplies. The first section of this presentation will be more theoretically to explain the basic knowledge of the “generation” of disturbances. This will be followed then by information about several mitigations that can be easily combined. You will get information about using a PFC an which types are available, Filtering and its pitfalls, snubber, controlling mechanism, technologies like spread spectrum, and you will get an idea of what you have to be careful when creating the layout.
The seminar shows different approaches to meet the emission requirements using switched mode power supplies. Dependent on the reason of high emission, some mitigations may be more efficient than others, but in the end it won’t be one single mitigation, but a set of remedial actions necessary to meet the requirements.
Finally, this Seminar contains a life measurement to make it more vivid and to show the effect of common mode noise, caused by the coupling mechanism against a metallic structure and against PE.