![]() ![]() ![]() Sadly, the practical switching frequency is limited due to the high switching loss of IGBT. Following, insulated gate bipolar transistors (lGBT) paralleled with Silicon Carbide Schottky diodes were considered to replace silicon MOSFETs in CCM totem pole PFC and CLLC converters. However, reverse recovery of the body diode of silicon MOSFETs resulted in high power losses in continuous conduction mode (CCM) making them impractical for high power applications. Next, the totem pole bridgeless PFC boost converter was considered in order to reduce diode numbers and increase efficiency. Unfortunately, conduction losses of the diode bridge rectifier are not efficient, nor does it support bi-directional operation. A conventional PFC boost converter is the most popular single-phase PFC topology. ![]()
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