Estimating the junction temperature of AC LEDs

Yi-wei Liu; Asiri Jayawardena; Terence R. Klein; Nadarajah Narendran

doi:10.1117/12.863060

18 August 2010 Estimating the junction temperature of AC LEDs

Yi-wei Liu, Asiri Jayawardena, Terence R. Klein, Nadarajah Narendran

Proceedings Volume 7784, Tenth International Conference on Solid State Lighting; 778409 (2010) https://doi.org/10.1117/12.863060
Event: SPIE Optical Engineering + Applications, 2010, San Diego, California, United States

Abstract

Light-emitting diodes operating on alternating current are gaining popularity in the LED industry, especially for lighting applications. Because junction temperature is a good predictor of LED performance, the availability of a method to accurately estimate the junction temperature of AC LEDs would be very useful. This study investigated a method in which a low reference current having a pulse width of less than several milliseconds was applied and the corresponding voltage across the device was measured and correlated to the junction temperature. Laboratory experiment data showed that the proposed method is a promising candidate for estimating AC LED junction temperature.

Citation Download Citation

Yi-wei Liu, Asiri Jayawardena, Terence R. Klein, and Nadarajah Narendran "Estimating the junction temperature of AC LEDs", Proc. SPIE 7784, Tenth International Conference on Solid State Lighting, 778409 (18 August 2010); https://doi.org/10.1117/12.863060

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