Dear all,
one of my AA would use the TLIN2029-Q1 in truck application where the ambient temperature can reach 140degC.
The device will work 1/10 of his life (life time 30000 hours) at 140degC.
Do you have any suggestion ?
regards,
Domenico
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Dear all,
one of my AA would use the TLIN2029-Q1 in truck application where the ambient temperature can reach 140degC.
The device will work 1/10 of his life (life time 30000 hours) at 140degC.
Do you have any suggestion ?
regards,
Domenico
Hi Eric,
from the DPPM tool the failure rate at 140degC is 152ppm, but is there any way to evaluate how many failures in 30000 operating hours ?
Moreover is there any method to evaluate how many hours the Transceiver can work (operative) at 140degC ?
regards,
Domenico
Domenico,
Thank you very much for your patience on this one.
At 140C, this device has a FIT rate of 35.0. FIT is the number of units failing per billion operating hours, which means that the TLIN2029-Q1 has 35 units fail under the given conditions. The MTTF under 140C is 2.86e7, meaning the mean time to failure would be ~29 million hours for one unit.
All of this being said, since this is outside the tested temperature range of the device, we can't guarantee the reliability of the device in 140C operating condition.
Another thing to note is these calculations are based on a specific sample size and probability formulas with an acceleration factor based on the tested temperature and the operating temperature. So according to the probability curves, the FIT rate is 35.0, it doesn't mean through this testing 35 units failed.
Regards,