Reliability Evaluation of Isolated Buck-Boost DC-DC Series Resonant Converter

This paper investigates the reliability of an isolated buck-boost DC-DC converter (IBBC) based on configuration a series resonant (SRC). Two approaches are employed to predict IBBC reliability, which MIL-HDBK-217F handbook and FIDES guide. The latter approach can take into account how failure rate components physics is influenced by varying yearly mission profile. To do this, thermal loading each component obtained, taking photovoltaic (PV) profile solar irradiance ambient temperature. In such case, PV module operating at maximum power point (MPP) transfers this DC microgrid (MG). Second, component-level calculated with both assessment approaches, evaluate converter-level rate. Therefore, be defined while serial connection account. analysis carried out using cloud Python engine installed running in Google Colaboratory notebook. results indicate that primary semiconductors most vulnerable IBBC. $B_{10}$ lifetime case-study 14.80 23.20 years, respectively. indicates that, when compared methodology from handbook, guide provide more accurate prediction for lifespan considering real field