The internationally accepted definition of reliability is: the ability to complete specified functions under specified conditions and within a specified time. This definition is suitable for a system, as well as a device or a unit. The probability of describing such random events can be used as a characteristic quantity and characteristic function to characterize the reliability of the switching power supply. This leads to the definition of reliability [R(t)]: the probability that the system completes the specified function under specified conditions and within a specified time.
If the system has no components working at the beginning (t = 0), and no components are still working normally at time t, then
Mean time between failures (MTBF) is an important indicator of switching power supplies, which is used to measure the reliability of switching power supplies.
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