MTBF: misquoted and misunderstood
Reliability is one of the most important factors that a designer needs to consider when specifying components or subsystems – particularly when the component in question is the power supply on which an entire assembly relies. And yet reliability figures are possibly the most ambiguous on any datasheet – including those for power products.
Mean operating time between failures (MTBF) is the most familiar way of specifying reliability. But even this simple measure can be misquoted and misunderstood.
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