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Posted by: Thomas Urbanczyk
Date posted: Thu Nov 4 9:52:14 US/Eastern 2004
Subject: How to calculate failure rates for PCBs
Is it possible to model PCBs in PRISM?
What method would you suggest to model PCBs in PRISM?
In other prediction tools like Isograph Workbench (MIL-HDBK-217F) it is possible to use a "Interconnetion Assembly" to take thermal interaction between components and PCB into account.
Posted by: vallon
Date posted: Wed Nov 3 10:15:31 US/Eastern 2004
Subject: Power MOSFET reliability data
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).
Posted by: Fargneil Ausenhaus
Date posted: Thu Jul 29 15:15:49 US/Eastern 2004
I am wondering how one is to use this software to account for several stages of a products life span. We must incorporate shelf time, transport, launch, and operation of a device but I see no way to do this all in one system. Furthermore, how do we accomodate the proper proportions of the overall life span for each stage, ie how do I make the travel time 1/20 of the overall lifetime? Thank you for whomever's assistance.
Posted by: Giovanni Luciani
Date posted: Tue Apr 13 10:05:36 US/Eastern 2004
Subject: Duty cycle assessment/Operating hours conversion
Suppose to have an item with 360 yearly operating hours distributed among 240 yearly operating days, the duty cycle will have to be assessed dividing the annual operating hour by 240*24 or 365*24?
Thank you in advance for your support
Thank you for your support
Posted by: Cong Nguyen
Organization:DRS Technologies-Signal Solutions
Date posted: Thu Apr 8 15:59:12 US/Eastern 2004
What electronic components PRISM does not support, e.g., Inductor, Oscillator?
Is there a way to import failure data from other software (Relex) to compensate for these 'not-supporting' components?
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