Why SMPS is required? What are the applications of switched mode power supply? All Questions › Category: Power Electronics › Why SMPS is required? What are the applications of switched mode power supply? 0 Vote Up Vote Down chetan shidling asked 4 years ago I need short information. 1 Answers 1 Vote Up Vote Down chetan shidling answered 4 years ago The switched mode power supply is require to provide supply to the devices efficiently and smoothly. Like it is used in electric vehicle charging stations, and laptop charger.