Input filter design for power factor correction converters operating in discontinuous conduction mode

Power factor correction (PFC) converters operating in discontinuous conduction mode (DCM) are very attractive for use in low-cost and low-power applications, due to simpler control when compared with continuous conduction mode (CCM) operation. Design of the EMI input filter for DCM operation has different constraints in certain aspects, when compared with the CCM case. This paper focuses on particularities of the input filter design in the DCM case.