The Effect of Electrolytic Capacitors on SMPS's Failure Rate

 Abstract—Recently, reliability is one of the serious requirements of electronic systems. The numbers of system failures, repair cost, guarantee and etc are estimated by reliability prediction. In this paper, the reliability of a switching power supply, which is used for personal computers, evaluates. It will show that electrolytic capacitors, used in input and output filters, play a significant role on the computer's power supply's life time. Ambient temperature, derating, and capacitance effect on the failure rate will discuss. The remedies are recommended for more life time.