Mix-voltage power conversion for single-inductor dual-output (SIDO) boost converters and SIDO bipolar converters

A comprehensive analysis was conducted to develop DC characteristic equations for single-inductor dual-output (SIDO) boost converters and SIDO bipolar converters. From the analysis results, it was discovered, contrary to conventional thinking, that the SIDO boost converters can step-down one of the output voltages. And the SIDO bipolar can also step down the positive output voltage previously deemed not possible. These findings extend the application ranges of both converter types, e.g., both types can possibly be used in the applications where a single lithium-ion battery is deemed not possible previously. Experimental results validated the findings and the analytical results.