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    【6h】 PoF-Simulation-Assisted Reliability Prediction for Electrolytic Capacitor in LED Drivers

    机译LED驱动器中电解电容器的PoF模拟辅助可靠性预测

    【摘要】The temperature of electrolytic capacitor in light-emitting diode (LED) drivers continuously increases under operation conditions, thus the capacitors degrade faster than that with constant temperature assumption. In this paper, a physics-of-failure (PoF)-based reliability prediction methodology is developed for LED drivers to consider the temperature change of electrolytic capacitor. SPICE simulation, compact thermal modeling, and Monte Carlo simulation are integrated to predict the failure rate distribution of an electrolytic capacitor of given LED driver systems. The simulation results agree well with the accelerated test results for an RC linear AC-DC converter. Furthermore, a single inductor buck-boost DC-DC converter is simulated to understand the degradation behavior of electrolytic capacitor. It has been found that the temperature of an output stage capacitor increases significantly during operation time. The capacitor's performance without taking temperature change into account results in an overestimated driver lifetime by more than 38% for the selected case study.

    【摘要机译】在工作条件下,发光二极管(LED)驱动器中电解电容器的温度持续升高,因此,与假定恒定温度的情况相比,电容器的退化速度更快。本文针对LED驱动器,开发了一种基于失效物理(PoF)的可靠性预测方法,以考虑电解电容器的温度变化。集成了SPICE仿真,紧凑型热模型和Monte Carlo仿真,以预测给定LED驱动器系统的电解电容器的故障率分布。仿真结果与RC线性AC-DC转换器的加速测试结果非常吻合。此外,模拟了单个电感器降压-升压型DC-DC转换器,以了解电解电容器的退化行为。已经发现,输出级电容器的温度在工作时间内显着升高。在选定的案例研究中,不考虑温度变化的情况下电容器的性能会导致驱动器寿命被高估超过38%。

    【原文格式】PDF

    机译 电容器;集成电路建模;发光二极管;退化;可靠性; Monte Carlo方法;电容;
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