Hello,
In ISO7841 datasheet, there is a graph of operation lifetime, figure 1 and figure 2.
It is described operation lifetime is 135 years in figure 1 and operation lifetime is 34 years in figure 2.
What does the operation lifetime mean?
The customer feels 34 year is short number which is describe in figure 2 and how much is the operation lifetime under 1800Vrms case.
If operation lifetime is defined as TDDB line(<1PPM failure rate), then the answer will be 254 years.
Please let me ask the operation lifetime meaning and 254 years is the number of 1800Vrms case is.
I heard we are still keeping the test and no failure happens. I guess the green area will become much higher value but need time to update the number for test is done though...
Best regards,
Toshihiro Watanabe