There are many practical situations in which the reliability of a device cannot be correctly predicted by considering only a single stress. In these cases, the use of a more complicated life model working with multi-stress is needed: in practice, taking into account two stresses provides good results in several real applications. In this paper, the problem of deriving a life model for LEDs that can be usefully employed in actual operating conditions is faced. The combination of thermal stress and forward current is considered and a test system used to carry out an exhaustive measurement campaign is presented. The results of some experiments are also presented and discussed.
A. Albertini, M.G. Masi, G. Mazzanti, L. Peretto, R. Tinarelli (2011). Experimental Analysis of LEDs’Reliability Under Combined Stress Conditions. s.l : s.n [10.1109/IMTC.2011.5944219].
Experimental Analysis of LEDs’Reliability Under Combined Stress Conditions
ALBERTINI, ANDREA;MASI, MARIA GABRIELLA;MAZZANTI, GIOVANNI;PERETTO, LORENZO;TINARELLI, ROBERTO
2011
Abstract
There are many practical situations in which the reliability of a device cannot be correctly predicted by considering only a single stress. In these cases, the use of a more complicated life model working with multi-stress is needed: in practice, taking into account two stresses provides good results in several real applications. In this paper, the problem of deriving a life model for LEDs that can be usefully employed in actual operating conditions is faced. The combination of thermal stress and forward current is considered and a test system used to carry out an exhaustive measurement campaign is presented. The results of some experiments are also presented and discussed.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.