Design of an ASIC-Controlled Bridgeless PFC Circuit with Two-Stage EMI Filter

This paper demonstrates a bridgeless power factor correction (PFC) circuit functional in the continuous conduction mode (CCM) using an application-specific integrated circuit (ASIC) called ICE3PCS02G, and has a two-stage electromagnetic interference (EMI) filter capable of covering line voltages from 90 to 230 V
AC
and regulates 400 V
DC
± 10%, 500 W output. This PFC application circuit suggests improving efficiency by removing the bridge rectifier that contributes to a massive loss in the input rectification stage before the converter alone. The design procedure and mathematical computation are likewise incorporated. Based on the test qualification performed, the output voltage regulated 388.78 V
DC
and 388.87 V
DC
during low line and high line, respectively, both in full load condition with a 98.628% efficiency satisfactorily enough to be classified in the 80PLUS Titanium standard, with a power factor reading of 0.97. This bridgeless PFC is an improvement method that complies with EN55032 Class A limits of conducted emissions, EN61000-3-2 Class A limits of harmonic current emission, and IEC 61000-4-11 voltage dip for EN55035 immunity capable for Performance Criterion B and C.