关键词: 高效率, 反激, 双绕组变压器, 叠加倍压, TL431

Abstract: The switching power supply with wide input voltage range,that output high voltage requirements have become increasingly common.Many high voltage output,but power products R&D needs comprehensive consideration of performance,reliability,manufacturability and cost etc.This paper introduces a design idea of power supply adopts double-column transformer,each winding rectifier and stacked boost,in order to obtain high voltage DC output.Analysis of this method in the device selection,frequency setting and circuit volume weight and other advantages.Finally,the development of a practical circuit,the simulation and experimental results show that the analysis and design meets the requirements..Finally a demo board was designed based on the topology,both simulation and testresultsshowed thatthe circuitmetdesign specifications.

Key words: high efficiency, flyback, double-column transformer, superimposed voltage-doubling, TL431