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In this paper, a positive output DC/DC converter with low total switching device power in dual working modes is introduced. One working mode is a step-up mode (boost), and other is a step-up/down mode (buck-boost). The proposed converter in step-up mode has high voltage gain ratio, low stress on switches, and continuous input current. In other working mode, the buck-boost converter with six relevant DC/DC converters is compared. By this comparison, it can be seen that the proposed converter has a lower voltage gain ratio, but instead the converter characteristics such as voltage stress on power switches and charge pump capacitors are in good condition for this mode. The proposed converter is analyzed in terms of the continuous conduction mode (CCM), steady state and efficiency with replacement of parasitic resistance effects. To validate the performance of the proposed converter experiments are conducted in the laboratory to claim the theoretical waveforms obtained from the PLECS simulation.

A Non-Isolated DC-DC Converter with Dual Working Modes and Positive Output Voltage