负偏压法测试大电压LED器件热阻  

Measuring thermal resistance for high voltage LED device and module by applying negative bias voltage

作　　者：陈国龙[1] 雷瑞瑞[1] 陈焕庭[1] 陈莹亮[1] 吕毅军[1] 高玉琳[1] 朱丽虹[1] 陈忠[1] 

机构地区：[1]厦门大学电子科学系,福建省半导体照明工程技术研究中心,福建厦门361005

出　　处：《实验技术与管理》2012年第4期48-52,共5页Experimental Technology and Management

基　　金：福建省重大科技项目(2011H6025);国家自然科学基金项目(11104230)

摘　　要：热阻是衡量LED器件散热性能的重要热学参数。采用外接负偏压恒压源方法,分别使用T3Ster/Teraled热光参数测试仪和NC2991热阻仪对正向电压超过仪器量程的同一型号功率型LED的热阻进行测试,并对两种测试结果的误差进行比较分析讨论。该方法拓展了热阻仪测量范围,使正向电压大于5V的LED器件/模块的热阻测试成为可能。Thermal resistance is a key parameter on rating the heat dissipating capability of LEDs, so its meas- urement becomes particularly essential. A thermal resistance measurement method for high voltage LED device and module is provided here, which can measure LED sample with forward voltage larger than 5V by applying negative bias voltage to the T3Ster/Teraled and the NC2991 thermal resistance testers respectively. The re-sults are further compared and discussed and prove to effectively expand the testing range of thermal resistance tester.

关 键 词：LED 热阻 正向电压 负偏压 

分 类 号：TN312.8[电子电信—物理电子学]