Totem Pole PFC
No diode drops – only switch conduction voltage
Very high efficiency possible >99%
Lower component count than other bridgeless
topologies
Topology is enabled by GaN HEMT
– Traditional Si FETs have too much body-diode Qrr
Large recovery currents and high losses
Topology is Intrinsically bi-directional power flow
– Can also be used in inverter/UPS applications
APEC 2015 Seminar S17
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