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.
出处
《实验技术与管理》
CAS
北大核心
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)
关键词
LED
热阻
正向电压
负偏压
LED
thermal resistance
forward voltage, negative bias voltage