CH SERIES
17th November 1999
| Test Name | Conditions | Sample Size |
Rejects |
|---|---|---|---|
| High Temperature Operating Life | 125° C ,1000Hrs , Vrated | 492 | 0 |
| High Temperature Storage | 150° , 1000Hrs | 537 | 0 |
| Temperature Cycling | -55° C , 25° C ,
125° C 15Min , 5Min ,15Min |
90 | 0 |
| Peak Pulse | (8x20uS) | 790 | 0 |
| Energy | (10x1000uS) | 396 | 0 |
| C&K = Empirically derived constants | ||||||||
| T = Absolute temperature (k) = T( C)+273 | ||||||||
| Note : 1 Failure in time (FIT) = 10^9 Hours at 55 C | ||||||||
| Klow = | 6649.4 |
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| Khigh = | 13129.7 |
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| No units tested = | 492 |
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| No units failed = | 1 |
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| K | 13129.7 |
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| MTBF = (e^(K/328-K/398))*(No units tested*1000) = | 5.62E+08 |
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| FIT = 1/(MTBF/(No units failed *10^9)) | = | 1.780073 |
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| Note :In the model one failure in time has to be estimated in order for the calculations to be completed. | ||||||||