PRISM Forum - Message Replies


Topic: PRISM Questions and Answers
Topic Posted by: SRC (src_forum@alionscience.com )
Organization: SRC
Date Posted: Wed Jan 12 8:33:33 US/Eastern 2000
Topic Description: Welcome to the PRISM forum! Please feel free to post your questions and comments about the PRISM assessment software here.

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Original Message:

Posted by: vallon (jerome.vallon-renexter@renault.com )
Organization:renault
Date posted: Wed Nov 3 10:15:31 US/Eastern 2004
Subject: Power MOSFET reliability data
Message:
I search some reliability data about power semiconductor like Power MOSFET (70V, 100A) or power IGBT (600V, 100A). these kind of device was used in power inverter (DC-AC converter)and work in switching mode (ON-OFF). Thank


Reply:

Subject: IGBT Failure Rates
Reply Posted by: David Dylis (ddylis@alionscience.com )
Organization: Reliability Analysis Center
Date Posted: Thu Nov 4 14:36:27 US/Eastern 2004
Message:
We have some data for IGBT that was based on 100,000 modules that have been in the field for over five years. The trend analysis of the failure returns indicates a failure rate of 100 fits for high power IGBT modules. I ran a calculation using the model in MIL_HDBK-217 and found that for a ground fixed condition the best case failure rate is 96 fits and the worst case is 384 fits. So, we have a pretty good match at 100 fits for low stressed devices. Switching on and off will increase the stress level, so if you have very high duty cycle you should consider a higher failure rate.


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