The Topology Design of the Multiple Flyback DC-DC converter
It's difficult to select suitable switching component in designing the switched power converter when the input-bus voltage is high, especially for low-output power.
The reason
is that because the voltage stresses of the ordinary switching
transistor ,are less than 1OOO Vdc, the transistor with high
voltage stresses, higher than 14OO Vdc are not only difficult to
get but also expensive.
Several topologies with transistors
series haw: been proposed to solve this problem. But as there
are some differences in switching parameters, the operating
voltage across the transistors probably deviates, going
beyond the voltage stress.