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1、合 肥 学 院 电 子 系Electronic Dept, Hefei University论 文 翻 译 专 业： 08电子系电子信息工程专业 班 级： 电子信息（1）班 姓 名： 学 号： 指导教师： 论文题目: 基于单片机的开关电源设计 【摘 要】本论文是有关基于单片机的开关电源设计的论述，开关电源在日常生活中应用非常广泛，比如电视机、电脑、冰箱以及其它常用的电子产品都需要开关电源，如今是数字化时代，用单片机实现电子产品十分方便，所以在这次设计中使用了单片机实现。在这次设计文档中，详细阐述了开关电源与线性电源的比较，方案论证，总体结构设计，并附以相关电路图表示，最后生成了相关的PCB电路
2、图。【关键词】线性，半导体，开关，储能，转换，滤波【Abstract】 This paper is discourse based on single chip switching power supply design, switching power supplies in their daily lives in a very wide range, such as televisions, computers, refrigerators and other commonly used electronic products require switching power supply
3、, now is the digital age, withsingle-chip electronic products is very convenient, so the MCU used in this design. In the design documents, elaborated a comparison of the switching power supply and linear power demonstration program, the overall structural design, accompanied by the relevant circuit
4、diagram, and finally generate the PCB schematic.【Key words】 Linear, semiconductors, switches, energy storage, conversion, filteringThe design Based on single chip switching power supply 1、uses The switching power supply products are widely used in industrial automation and control, military equipmen
5、t, scientific equipment, LED lighting, industrial equipment, communications equipment,electrical equipment,instrumentation, medical equipment, semiconductor cooling and heating, air purifiers, electronic refrigerator, LCD monitor, LED lighting, communications equipment, audio-visual products, securi
6、ty, computer chassis, digital products and equipment and other fields.2、Introduction With the rapid development of power electronics technology, power electronics equipment and peoples work, the relationship of life become increasingly close, and electronic equipment without reliable power, into the
7、 1980s, computer power and the full realization of the switching power supply, the first to complete the computer Power new generation to enter the switching power supply in the 1990s have entered into a variety of electronic, electrical devices, program-controlled switchboards, communications, elec
8、tronic testing equipment power control equipment, power supply, etc. have been widely used in switching power supply, but also to promote the rapid development of the switching power supply technology . Switching power supply is the use of modern power electronics technology to control the ratio of
9、the switching transistor to turn on and off to maintain a stable output voltage power supply, switching power supply is generally controlled by pulse width modulation (PWM) ICs and switching devices (MOSFET, BJT) composition. Switching power supply and linear power compared to both the cost and grow
10、th with the increase of output power, but the two different growth rates. A power point, linear power supply costs, but higher than the switching power supply. With the development of power electronics technology and innovation, making the switching power supply technology to continue to innovate, t
11、he turning points of this cost is increasingly move to the low output power side, the switching power supply provides a broad space for development. The direction of its development is the high-frequency switching power supply, high frequency switching power supply miniaturization, and switching pow
12、er supply into a wider range of application areas, especially in high-tech fields, and promote the miniaturization of high-tech products, light of. In addition, the development and application of the switching power supply in terms of energy conservation, resource conservation and environmental prot
13、ection are of great significance.3、classification Modern switching power supply, there are two: one is the DC switching power supply; the other is the AC switching power supply. Introduces only DC switching power supply and its function is poor power quality of the original eco-power (coarse) - such
14、 as mains power or battery power, converted to meet the equipment requirements of high-quality DC voltage (Varitronix) . The core of the DC switching power supply DC / DC converter. DC switching power supply classification is dependent on the classification of DC / DC converter. In other words, the
15、classification of the classification of the DC switching power supply and DC/DC converter is the classification of essentially the same, the DC / DC converter is basically a classification of the DC switching power supply. DC /DC converter between the input and output electrical isolation can be divided into two categories: one is isolated called isolated DC/DC converter; the other is not isolated as non-isolated DC / DC converter. Isolated DC / DC converter can also be classified by the number of active power de
