低電壓大電流VRM拓撲結構和均流技術研究

摘要：針對新一代微處理器對其供電電源的高性能要求，分析了滿足新一代微處理器開關電源指標的拓撲結構和均流方法，表明了交錯并聯(lián)的準方波電路的輸出紋波幅值小，效率高，瞬態(tài)響應快；采用了新型的均流控制技術，并對均此流技術作了概括和拓展。 敘詞：交錯式；準方波；電壓調整模塊； 電流分享； 同步整流 Abstract：Based on the high requirement of microprocessors on the power supply, the topologic structure and current-sharing technique of new switching power supplies in accordance with the performance requirements by future microprocessors was analysed. It is shown that the cross-paralleled quasisquare-wave(QSW)converter circuit features small output wave amplitude, high equivalent efficiency, a fast transient response. A novel current-sensing and current-sharing technique was proposed and generalized. Keyword：interleaved; quasisquare-wave(QSW); voltage regulator module(VRM); current sharing;synchronous rectification