目录引言.....................................................................11概述..................................................................21.1课题来源及意义........................................................21.2课题基本要求..........................................................21.3课题相关背景..........................................................22开关电源方案设计....................................................32.1开关电源工作原理......................................................32.2开关电源与线性电源的比较..............................................42.3方案论证..............................................................42.3.1方案1...............................................................42.3.2方案2...............................................................52.3.3方案3...............................................................52.3.4方案分析............................................................52.3.5总体结构设计........................................................52.4难点分析..............................................................62.4.1如何提高电源工作频率................................................62.4.2储能电感的绕制......................................................72.4.3标度转换技术........................................................72.5控制技术选择..........................................................82.6开关变换器结构分析与选择..............................................92.7开关电路器件参数选择.................................................122.7.1功率开关管的选择...................................................122.7.2滤波电容的选择.....................................................122.7.3储能电感的选择.....................................................132.7.4续流二极管的选择...................................................133硬件电路设计.......................................................133.1电源电路设计.........................................................133.1.1整流滤波电路.......................................................143.1.2开关变换电路.......................................