AN2252零电压开关和发射极开关双极晶体管在3相辅助电源

AN2252零电压开关和发射极开关双极晶体管在3相辅助电源

AN2252
Application note
Zero-voltage switching and emitter-switched bipolar transistor
in a 3-phase auxiliary power supply

Introduction
The flyback converter is a popular choice in applications where the required power is
normally less than 200W. The main reasons explaining its popularity are its simplicity, low
cost and high efficiency for a small number of active components.
In switching converters power loss is caused by power dissipation within the parasitic
elements of both passive and active components. Power loss in passive componen