基于D类放大器的可调开关电源的设计

文档编号:JD317       文档字数:14273,页数:22

摘要
在电子技术发展的越来越快的今天，许多设备对电源的要求越来越严格，本文从D类放大器的应用出发，结合模拟电子技术从元器件、电路拓扑结构和电路结构等方面分析开关电源的工作原理，并从开关电源的主要元器件D类放大器出发，分析了D类放大器的工作原理；电压信号的放大技术，以及用555定时器设计施密特触发器整形滤波，全面的分析了开关电源实现的原理、可靠性，元器件对电路产生干扰，讨论其对电网产生的危害；在讨论开关电源产生电磁干扰原因之后提出了相对应的一些常用的抑制措施，诸如电气隔离技术、接地技术、滤波技术等等。
关键词:开关电源；D类放大器；可靠性设计；抑制措施；隔离技术

Abstract:
AT the morden days with the electrinic technology fast development , it is strict to power Supply in the many equipment’ using  This paper analyzes the mechanism of electromagnetic disturbance in switching-mode power supply from the three aspects such as the component, the structure of circuit, the topology destruct of circuit according to the theory of electromagnetic and deduces the used of Classed D and power  amplifiers of the switching mode power supply. And we analyze the reason that the two kinds of noise interfere to the electric network and discuss the harm of the disturbance to the electric network from the point of the theory of the switching mode power supply. After the discussion of the electronic and component cause of switching mode power supply we supply with some corresponding depressed methods such as the electrical isolation technology, grounding technology, filtering technology, the PCB technology, the method of placing line and so on. At last we discuss the soft switch technology and the frequency-modulation technology that are controversial now. In addition, the computation method about inducer, and capacitance, the design of department about the high frequency capacitance, the choice and setting principle about filters have been introduced detailed in the design of amplifiers filters and so on .

Keywords:  Switching Power Supply；class-D Amplifier ；the design of reliability；the ways
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目录
一、摘要  2
二、整体电路的设计  3
三、单元电路的设计  4
1  三角波发生器的设计  4
2  电压放大电路的设计  6
3  脉冲整形电路的设计  9
4  辅助稳压电源电路的设计  10
5  负载输出电路的设计  12
6  电压调整电路的设计  13
7  输出滤波电路的设计   14
8  系统的可靠性分析  14
四、结束语及谢辞  19
五、参考文献  20
六、设计的电路原理图  21

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