50W LED驱动电源研究与设计

发布时间：2018-04-23 01:09

本文选题：LED + 驱动电源　；参考：《西安电子科技大学》2014年硕士论文

【摘要】：随着半导体技术的快速发展，LED(Light Emitting Diode)照明已经在生活、生产中扮演着重要的角色。与传统的LED开关电源相比，新型LED照明技术因其具有可靠性高、电气隔离、光学调光、环保性能好等优点而成为未来节能照明的发展方向。针对LED的特性研究，论文设计了一款LED恒流驱动电源。本文设计的驱动电源采用两级驱动结构。为了提高变换器输入端功率因数，减少对电网的谐波污染，前级电路采用了PFC技术，对Boost PFC电路的工作原理进行了详细研究，对FAN7527B的外围电路进行了详细的设计。为了减小开关损耗，提高变换器的效率，后级电路采用了准谐振的反激变换技术，对准谐振反激电路的工作原理进行分析，设计了芯片STR-Y6753的外围电路。开关电源的输出级采用芯片AP4310完成恒流恒压的功能。采用Saber软件对LED电源进行了建模仿真，得到电路的工作性能参数。仿真结果分析表明，LED开关电源工作效率在85%以上，功率因数为0.90，纹波系数在1%以内，，验证了设计方案的可行性。
[Abstract]:With the rapid development of semiconductor technology, LEDX Light Emitting Diode (LED) lighting has played an important role in daily life and production. Compared with the traditional LED switching power supply, the new LED lighting technology has the advantages of high reliability, electrical isolation, optical dimming, good environmental performance and so on, so it will become the development direction of energy-saving lighting in the future. In view of the characteristic research of LED, a LED constant current driving power supply is designed in this paper. The power supply designed in this paper adopts two-stage drive structure. In order to improve the input power factor of the converter and reduce the harmonic pollution to the power grid, the PFC technology is used in the front stage circuit. The working principle of the Boost PFC circuit is studied in detail, and the peripheral circuit of FAN7527B is designed in detail. In order to reduce the switching loss and improve the efficiency of the converter, the backstage circuit adopts the quasi-resonant flyback conversion technology, analyzes the working principle of the resonant flyback circuit, and designs the peripheral circuit of the chip STR-Y6753. The output stage of the switching power supply uses chip AP4310 to complete the function of constant current and constant voltage. Saber software is used to model and simulate the LED power supply, and the performance parameters of the circuit are obtained. The simulation results show that the efficiency of LED switching power supply is more than 85%, the power factor is 0.90 and the ripple coefficient is less than 1%. The feasibility of the design is verified.
【学位授予单位】：西安电子科技大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TM923.34

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