摘要
LED照明已成为21世纪最引人注目的新技术领域之一,其中的大功率LED更是能适应普通照明领域的需要。然而结温和热阻制约着大功率LED的发展。大功率LED热阻测试技术的开发有利于LED在散热技术上的完善,有助于大功率LED实现迅速发展和更为广泛地应用。本文叙述了利用动态电学测试方法测量大功率LED热阻和结温的原理、测量方法,并基于此开发了热阻测试系统SHU-THERM-1。通过对比实验,证明本热阻测试系统能实现对单个大功率LED稳态热阻的自动且准确测量,精度较高,稳定性好。
LED lighting is one of the most attractive new techniques in the new century, and high-power LED is regarded as the compatible device for conventional lighting. However, the junction temperature and thermal resistance restrict the development of high-power LED. The study on measurement of thermal resistance of high-power LED can improve the deep understanding of LED thermal dispersion and to develop high-power LED fast and wildly. The principle and procedure based on the electrical measurement method for thermal resistance and junction temperature of high-power LED are described. Then, the testing system for thermal resistance, SHU-THERM-1 ,has been prototyped. Compared with commercial equipments, the experimental results show that the testing system can determine steadystate thermal resistance of single high-power LED with high precision and good stability.
出处
《电子测量技术》
2008年第9期17-20,共4页
Electronic Measurement Technology
基金
国家自然科学基金(50675130)
教育部新世纪人才计划(NCET-07-0535)
上海市科委半导体照明专项计划(06DZ11403
07DZ11408)
曙光计划(05SG42)资助
关键词
测试系统
大功率LED
结温
热阻
电学法
testing system
high-power LED
junction temperature
thermal resistance
electrical measurement method
