Print Email Facebook Twitter A stochastic process based reliability prediction method for LED driver Title A stochastic process based reliability prediction method for LED driver Author Sun, Bo (Guangdong University of Technology) Fan, Xuejun (Lamar University) van Driel, W.D. (TU Delft Electronic Components, Technology and Materials; Philips Lighting Research) Cui, Chengqiang (Guangdong University of Technology) Zhang, Kouchi (TU Delft Electronic Components, Technology and Materials) Date 2018 Abstract In this study, we present a general methodology that combines the reliability theory with physics of failure for reliability prediction of an LED driver. More specifically, an integrated LED lamp, which includes an LED light source with statistical distribution of luminous flux, and a driver with a few critical components, is considered. The Wiener process is introduced to describe the randomness of lumen depreciation. The driver's survival probability is described using a general Markov Chain method. The system compact thermal model (physics of failure model) is developed to couple with the reliability methods used. Two scenarios are studied: Scenario S1 considers constant driver's operation temperature, while Scenario S2 considers driver's temperature rise due to lumen depreciation. It has been found that the wide life distribution of LEDs will lead to a large range of the driver's survival probability. The proposed analysis provides a general approach for an electronic system to integrate the reliability method with physics models. Subject LED driverLED lampLumen depreciationReliability predictionStochastic process To reference this document use: http://resolver.tudelft.nl/uuid:5b47f226-b284-4198-badb-b0de8f6e4079 DOI https://doi.org/10.1016/j.ress.2018.06.001 Embargo date 2021-05-28 ISSN 0951-8320 Source Reliability Engineering & System Safety, 178, 140-146 Bibliographical note Green Open Access added to TU Delft Institutional Repository ‘You share, we take care!’ – Taverne project https://www.openaccess.nl/en/you-share-we-take-care Otherwise as indicated in the copyright section: the publisher is the copyright holder of this work and the author uses the Dutch legislation to make this work public. Part of collection Institutional Repository Document type journal article Rights © 2018 Bo Sun, Xuejun Fan, W.D. van Driel, Chengqiang Cui, Kouchi Zhang Files PDF 1_s2.0_S0951832017310712_main.pdf 1.83 MB Close viewer /islandora/object/uuid:5b47f226-b284-4198-badb-b0de8f6e4079/datastream/OBJ/view