Description

Flyback topologies are the most common and widely used topologies in auxiliary power supply design. Fly-back converter could be single phase as well as three phase types.  Fly- back is most commonly used due to its simplicity in design and control, less components, low cost solution, and built-in galvanic isolation.  
Two Switch Flyback helps to overcome the limitations of conventional flyback converter by splitting overall voltage stress equally between the two transistors. Two Switch Flyback is typically used for the power supplies >250W.

Overview

An overview of relevant components, power class and topologies is shown in below table.