摘要：從功能角度出發(fā)對(duì)開關(guān)電源主電路進(jìn)行了分類研究，詳細(xì)分析了開關(guān)電源DC/DC轉(zhuǎn)換器常規(guī)拓?fù)浣Y(jié)構(gòu)的基本原理及它們的優(yōu)點(diǎn)、缺點(diǎn)，并對(duì)開關(guān)電源主電路拓?fù)浣Y(jié)構(gòu)的選擇依據(jù)進(jìn)行了一些探討。 敘詞：開關(guān)電源 主電路 拓?fù)浣Y(jié)構(gòu) Abstract：The classification research of switch power circuit from functional perspective.The working principles and characteristics are described in details for conventional topology of the switching power supply DC/DC converter. On the basis of selecting are discussed for the switch power supply of main circuit topology structure.　　　 Keyword：Switching power supply , Main circuit , Topology structure