کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
4971584 1450524 2017 8 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Converter-level FEM simulation for lifetime prediction of an LED driver with improved thermal modelling
موضوعات مرتبط
مهندسی و علوم پایه مهندسی کامپیوتر سخت افزارها و معماری
پیش نمایش صفحه اول مقاله
Converter-level FEM simulation for lifetime prediction of an LED driver with improved thermal modelling
چکیده انگلیسی
Light-emitting diode (LED) drivers are widely regarded as the weakest link in the solid-state lighting systems. This paper proposes an improved thermal modelling process for the mission profile based lifetime prediction of reliability critical components in a LED driver for the outdoor lighting application. A converter-level finite element simulation (FEM) simulation is carried out to obtain the ambient temperature of electrolytic capacitors and power MOSFETs used in the LED driver, which takes into account the impact of the driver enclosure and the thermal coupling among different components. Therefore, the proposed method bridges the link between the global ambient temperature profile outside of the enclosure and the local ambient temperature profiles of the components of interest inside the driver. A quantitative comparison of the estimated annual lifetime consumptions of MOSFETs and capacitors are given based on the proposed thermal modelling process, and the datasheet thermal impedance models and the global ambient temperature.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Microelectronics Reliability - Volumes 76–77, September 2017, Pages 117-122
نویسندگان
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