This paper examines the rules and regulations governing control of EMI, discusses types of noise generated by SMPS, and provides basic guidance for EMI mitigation for SMPS, whether installed in other equipment as part of a larger system or a SMPS designed for stand-alone applications.
Whitepaper: Electromagnetic Compatibility Considerations for Switched Mode Power Supplies
Switched Mode Power Supplies (SMPS) generate Electromagnetic Interference (EMI) by virtue of their inherent design characteristics. Internal SMPS circuits that generate undesirable emissions that are rich in harmonics can cause electrical interference both internally to the circuit in which the power supply is installed and to other electronic equipment in the vicinity of the emission source.