大功率LED照明的驱动和散热设计  

Driving Circuit and Thermal Radiation Design for High Power LED

作　　者：范永金[1] 王东明[1] 吴刚[1] 

机构地区：[1]中国电子科技集团公司光电研究院,天津300000

出　　处：《光电技术应用》2014年第2期75-78,86,共5页Electro-Optic Technology Application

摘　　要：对大功率LED光源的驱动电源和散热特性进行了分析。通过对大功率LED驱动电源的应用效率和光源热量产生、热源传导方式及热流特性的研究,提出了优化改进驱动电路设计和结构设计方法,在驱动电路设计中通过升/降压恒流电路、采用工频变压整流设计提高电源的利用率,降低电源耗热;在结构设计中通过优化改进翅片材质及界面材料、改进翅片结构、加装热管和均温板几种方式进一步提高散热效果,从而使产品的质量和性能得到全面提升。The characteristics of driving power and thermal radiation for high-power LED light source are ana-lyzed. Based on the research on application efficiency, light source heat generation, heat conduction and heat cur-rent characteristics of high power LED driving power, a method of improving driving circuit and structure design isproposed. The efficiency of the power source is improved and the thermal loss is reduced through boost-buck con-stant current circuit as well as using the frequency transformer rectifier in the driving circuit. For structure design,thermal radiation effect is improved further through optimizing the materials for the fins and interfaces, improvingthe fins structure, installing heat pipes and temperature equalization plate. So the quality and performances of theproduct will be better.

关 键 词：大功率LED 恒流 热阻 散热片 热管 

分 类 号：TN705[电子电信—电路与系统]