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大功率LED热阻自动测量方法研究
引用本文:王小增,杨久红.大功率LED热阻自动测量方法研究[J].应用声学,2015,23(5):1489-1491.
作者姓名:王小增  杨久红
作者单位:嘉应学院,嘉应学院
摘    要:在没有散热措施的情况下,大功率LED芯片的温度迅速升高,当结温超过最大允许温度时,大功率LED会因过热而损坏。大功率LED灯具设计中,最主要的设计工作就是散热设计。利用LED半导体器件的结电压与结温具有良好的线性关系的特性,通过测量大功率LED工作时的正向压降,工作电流,恒温箱温度和热衬温度,采用的电学参数法,实现了大功率LED热阻的自动测量。设计并制作了大功率LED热阻自动测量仪,快速、准确的测量了LED晶片到热衬的热阻。六种不同规格LED晶片到热衬的热阻测量值与计算值之间的误差小于10%。热阻测量值普遍高于理论计算值,说明LED制造工艺水平还有很大的提升空间。

关 键 词:大功率LED  热阻  自动测量  热衬温度

Method of Automatic measurement of temperature Resistance of High power LED
Yang Jiuhong.Method of Automatic measurement of temperature Resistance of High power LED[J].Applied Acoustics,2015,23(5):1489-1491.
Authors:Yang Jiuhong
Institution:Jiaying University,Meizhou,Guangdong,514015,
Abstract:In the absence of cooling measures, the wafer temperature of high power LED rises rapidly. When the junction temperature exceeds the maximum allowable temperature, the high power LED will be damaged due to overheating. In the design of high power LED lamps, the main work is to the temperature design. Using a good linear relationship characteristic of the semiconductor devices between the LED junction voltage and junction temperature, this paper measured the high-power LED working voltage, working current, temperature of the incubator and heat sink. Adopting the method of electrical parameters, the paper measure the temperature resistor of high power LED. The high-power LED temperature resistance measuring instrument is designed and made. The temperature resistance from the LED wafer to the heat sink is measured fast and accurately, and the error is less than 10%. The measured value of the temperature resistor is generally higher than the theoretical calculated value. It shows that the LED manufacturing technology level can be improved.
Keywords:High Power LED  Temperature Resistor  Automatic Measurement  Heat sink Temperature
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