目录中文摘要......................................................................1Abstract......................................................................2第一章绪论...................................................................31.1设计概述................................................................31.2课题背景及意义..........................................................31.3设计的前景和价值........................................................41.4设计的目的及可行性分析..................................................41.5论文结构安排............................................................5第二章国内外研究现状分析.....................................................62.1LED基础知识.............................................................62.1.1LED的基本特性.......................................................62.1.2LED驱动电路基本的设计需求...........................................72.2LED驱动方式.............................................................72.2.1线性电源驱动方式....................................................72.2.2开关电源拓扑结构类型................................................82.2.3开关电源拓扑结构比较...............................................102.2.4开关电源调制模式...................................................102.3调光方式...............................................................112.3.1模拟调光...........................................................112.3.2PWM调光...........................................................112.3.3调光方式比较及选择.................................................12第三章基本设计模型建立及参数计算............................................133.1设计概述.............................................................133.1.1时分复用控制方案.................................................143.1.2故障保护协议.....................................................143.2Boost变换器运行基本原理及工作模式的选择..............................153.3参数计算及元器件选择.................................................163.3.1计算电感最大输入电流.............................................163.3.2计算电感值.......................................................163.3.3输入电容选择.....................................................173.3.4每条支路LED数量的确定............................................173.3.5MOS管的选择......................................................183.3.6二极管的选择.....................................................19第四章实际设计应用及安全性保护..............................................204.1电流过冲保护.........................................................204.1.1Boost电路中产生电流过冲的原因....................................204.1.2软启动过程.......................................................214.2EMI的抑制............................................................224.2.1MOS管栅极串联电阻................................................224.2.2RC缓冲器........................................................234.2.3纯电阻支路.......................................................234.3器件保护.............................................................244.3.1MOS管放电保护....................................................244.3.2肖特基二极管反向尖峰保护.........................................254.4人体感应功能................................................
