SRC Forum - Message Replies

Forum: Reliability & Maintainability Questions and Answers

Topic: Reliability & Maintainability Questions and Answers

Topic Posted by: Reliability & Maintainability Forum (src_forum@alionscience.com )
Organization: System Reliability Center
Date Posted: Mon Aug 31 12:47:36 US/Eastern 1998

Original Message:

Posted by: Stanford Lee (stanford@serv.unityopto.com.tw )
Date posted: Mon Mar 1 1:45:04 US/Eastern 2004
Subject: LED Prediction
Message:
I have a question about how to prediction 50,000 hours power depreciation curve. I only have 1,000 hours room temperature burn-in data. Thanks.

Reply:

Subject: LED Reliability
Reply Posted by: BWD (bdudley@alionscience.com )
Organization: RAc
Date Posted: Mon Mar 15 15:00:52 US/Eastern 2004
Message:
Finding the L10 or wear-out point of the LED reliability will require a lot more data than 1000 hours. The only realistic way to find out the life parameters is to place a sample on accelerated stress test. The test needs to be performed to failure, then the life characteristics can be determined.