Design and Reliability Analysis of a New Non-Isolated DC–DC Converter Without Coupled Inductors

This article proposes a new non-isolated dc–dc converter without coupled inductors to attain a higher voltage gain at a low duty ratio, less voltage stress across the switch, and improved reliability. The operation of the proposed converter is examined through the steady-state mathematical equations in continuous conduction mode and discontinuous conduction mode. The boundary condition mode of the proposed topology is also discussed. Reliability analysis is performed using the MIL-HDBK-217F standard to predict the failure rate of the individual components. A laboratory-based prototype is developed and tested with 250 W to validate the operation of the proposed converter. Also, the proposed converter is tested with steady-state and dynamic conditions by changing the duty ratio and load values. The efficiency and power density of the proposed converter are 91.8% and 37.71 W/in$^{3}$ (2.3 kW/L).