This digest presents a comparative evaluation between a novel input-parallel output-series (IPOS) asymmetric buck-boost bidirectional dc-dc converter and the non-inverting buck-boost (NIBB) converter. The proposed converter is formed by an IPOS connection of an NIBB module and a boost module, operated in three optimized modes depending on the output voltage requirement. The proposed converter and the NIBB converter are compared based on the voltage gain, active switch utilization, total passive component energy ratings, and efficiency over a wide range of output voltage and power levels. The results indicate that the proposed converter can offer better overall efficiency, with reduced stress on semiconductor devices and lower filter size.
