基于单片机控制的高效率LED驱动电源的设计  

Design of High Efficiency LED Driving Power Supply Based on MCU Control

作　　者：李慧秀[1] 石桂名[1] LI Hui-xiu;SHI Gui-ming(School of Electrical Engineering,Dalian University of Science and Technology,Dalian 116052 China)

机构地区：[1]大连科技学院电气工程学院,辽宁大连116052

出　　处：《自动化技术与应用》2021年第9期80-84,89,共6页Techniques of Automation and Applications

基　　金：辽宁省教育厅项目(编号LPEDL[2018]471)。

摘　　要：针对两级式结构驱动电源效率偏低的问题,设计了一款基于单片机控制的高效率LED驱动电源。我们首先设计了LED驱动电源的硬件电路,包括PFC升压电路及DC/DC降压变换电路。在此基础上,对DC/DC降压变换电路的参数进行了选择。进一步将硬件电路与单片机控制程序结合来提高LED电源效率。最后设计了一台功率为50W的LED样机,实验结果验证了用单片机控制LED驱动电源能有效的将LED电源效率提高到93%以上。In order to solve the low efficiency of two-stage structure driving power supply,a high efficiency LED driving power supply based on MCU control is designed.First,the hardware circuit of LED driver power supply is designed,which includes PFC boost circuit and DC/DC voltage depressed transform circuit.Secondly,the parameters of DC/DC voltage depressed transform circuit are selected.The hardware circuit and MCU control program are combined to improve the efficiency of LED power supply.Finally,a 50W LED prototype is designed and the experimental results show the efficiency of LED power supply can be increased to over 93%,when the LED driving power supply is controlled by MCU.

关 键 词：LED 驱动电源 DC/DC降压变换电路 LM3445 填谷式电路 

分 类 号：TP273.5[自动化与计算机技术—检测技术与自动化装置]