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IES TM 26 2015

$27.08

IES TM-26-15: Methods for Projecting Catastrophic Failure Rate of LED Packages

Published By Publication Date Number of Pages
IES 2015 15
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PDF Catalog

PDF Pages PDF Title
1 Cover
3 Copyright
4 Prepared by the Solid State Lighting Subcommittee of the IES Testing Procedures Committee
6 Contents
8 Introduction
1.0 Scope
2.0 Normative References
3.0 Definitions
3.1 Catastrophic LED Package Failure
3.2 Failure in Time (FIT) Rate
9 4.0 Description of Failure Rates – “Bathtub Curve
4.1 Early Failure Period
4.2 Stable Failure Rate Period
4.3 Wearout Failure Period
5.0 Methods of Failure Rate Projection for the Stable Rate Period
5.1 Prioritization of Catastrophic Failures Analysis and Projection
10 5.2 Convert All Temperatures to Kelvins
5.3 Method 1 – Results of Catastrophic Failure Rate Reported in Table Format
5.4 Method 2 – Catastrophic Failure Rate Projection Model A
5.4.1 Stress Factor for Temperature Dependence
5.4.2 Stress Factor for Forward Current Dependence
11 5.4.3 Reporting Results
5.5 Method 3 – Catastrophic Failure Rate Projection Model B
5.5.1 Stress Factor for Temperature Dependence
5.5.2 Stress Factor for Forward Current Dependence
5.5.3 Reporting Results
Informative References
12 Annex A – Weibull Analysis for Catastrophic Failure Rate Projection
14 References for Annex A
IES TM 26 2015
$27.08