目
录
1.1 引言..................................................................................................................................................1
1.2 通信设备对通信开关电源的要求..................................................................................................1
1.3 通信电源的研究现状、水平和发展趋势......................................................................................2
1.3.1 国内外研究现状和水平..........................................................................................................2
1.3.2 通信电源发展趋势..................................................................................................................4
2.1.1 开关电源构成..........................................................................................................................6
2.1.2 开关电源分类..........................................................................................................................7
2.2 PWM 开关电源基本原理...............................................................................................................7
2.3 B
2.3.1 Buck 变换器基本工作原理.....................................................................................................8
2.3.2 Buck 变换器工作模态分析.....................................................................................................8
2.3.3 Buck 变换器外特性...............................................................................................................11
3.1 通信开关电源硬件设计指标和方案............................................................................................17
3.2 输入整流器/滤波器部分的设计..................................................................................................18
3.2.1 EMI 滤波器............................................................................................................................18
3.2.2 单相桥式整流电路................................................................................................................19
3.3.1 占空比 D................................................................................................................................20
3.3.2 滤波电感................................................................................................................................20
3.3.3 滤波电容................................................................................................................................26
3.3.4 开关管 Q 的选取...................................................................................................................28
3.3.5 续流二极管 D 的选取...........................................................................................................28
3.4.1 Buck 变换器仿真参数及指标...............................................................................................28
3.4.2 Buck 变换器开环仿真结果及分析.......................................................................................29
.........................................................................................33
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