BIMOSFET: An Energy Efficient Alternative for MOSFET in Fly Back Converter

Abstract

One of the typical applications for a flyback converter is the auxiliary power supply for the IGBT gate driver in an inverter. The essential requirement for a switch of a flyback converter in a drives inverter is a high breakdown voltage combined with fast switching speed. To minimize the predominant switching losses, the switch-on and -off energies have to be low. This paper presents a comparative analysis of the performance of MOSFET and BIMOSFET in flyback converter. The main advantage of the BIMOSFET lies first in its lower turn- on losses and secondarily in its lower conduction losses. A comparison of the total energy losses between a MOSFET and a BIMOSFET results in 35 % less total losses for the BIMOSFET.