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i.MXRT1050 Product Lifetime Usage Estimates

Question asked by gcary on Dec 10, 2018
Latest reply on Dec 13, 2018 by gcary

I have a question about application note AN12170, "i.MXRT1050 Product Lifetime Usage Estimates".

Why is the lifetime estimate for the industrial qualified part different than the commercial part for the same exact operating conditions?  Here are the conditions:

 

DCDC Enabled
ARM core speed: 528 MHz
ARM core operating voltage: 1.15V

 

Commercial Qualification
These conditions are represented by the green curve in Figure 1 of AN12170.  Let's pick an arbitrary point that can be used to compare to the Industrial graph.  At a Junction Temperature of about 91.5 degrees C, the Power-On Hours is estimated at 95,000 hours.

 

Industrial Qualification
These conditions are represented by Figure 3 of AN12170.  At a Junction Temperature of about 91.5 degrees C, the Power-On Hours is estimated at 195,000 hours.

 

If the DCDC power mode, frequency, voltage, and packages are exactly the same, why is there such a large difference in the estimated lifetime of these devices?

 

Thanks,

Greg

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