Design Optimization and Controller Modelling of an ASIC Controlled Single Phase Critical Conduction Mode Boost PFC Using Simplis

Single Phase Critical Conduction Mode is overlooked compared to Interleaved CRM and Continuous Conduction Mode as a Power Factor Correction mode when the application is medium to high power because of the design compromises that it begins to have at higher power requirement. This study explores the design and simulation of a High Efficiency and High Power Factor Single-Phase CRM Boost PFC operating at the assumed practical limit of the mode and is design with the consideration to be compliant with EMC standards. The design was able to supply an output voltage of 450V and 350W of power while maintaining a power factor greater than 0.9 and efficiency greater than 97% for a wide input range. A two stage EMI Filter was designed for the converter for the consideration of EMC, and the parameters taken into consideration for the filter design are taken from the simulation results. The design used the PFC ASIC NCP1608 which was modeled and simulated using Simplis.