Junction Temperature Estimation for High Power Light-Emitting Diodes

• Published in: 2007 IEEE International Symposium on Industrial Electronics pp. 3030 - 3035
• Main Authors: Sa, E.M., Antunes, F.L.M., Perin, A.J.
• Format: Conference Proceeding
• Language: English
• Published: IEEE 01-06-2007
• Subjects: Electric resistance; Energy management; Light emitting diodes; Measurement errors; Optical devices; Optical variables control; Photometry; Temperature; Thermal factors; Thermal management
• ISBN: 1424407540; 9781424407545
• ISSN: 2163-5137
• DOI: 10.1109/ISIE.2007.4375098

The understanding of the thermal properties of a high power LEDs is essential in order to achieve the highest optical performance of the device without sacrificing its reliability. In addition to that, the good thermal management is also a key factor to avoid thermal induced variation of the photometric / colorimetric properties of power LEDs, such as variation of relative light output or the spectrum. This paper proposes a methodology to estimate junction temperature of high power LEDs. This method allows discarding the influence of the intrinsic series resistance of the LED electric model in 1-V curve, avoiding, as a consequence measurement errors.