Abstract
This paper proposes a novel switched-capacitor (SC) ac-ac converter using nested voltage equalizers. In the proposed ac-ac converter, a part of the capacitor voltage of a voltage equalizer is converted by other voltage equalizers. For this reason, the proposed ac-ac converter can achieve not only high step-up/step-down gain but also fewer circuit components than conventional SC ac-ac converters. Furthermore, the proposed ac-ac converter can offer a simple circuit control using non-overlapped two-phase clock pulses. The validity of the proposed design is confirmed by simulation program with integrated circuit emphasis (SPICE) simulations. The SPICE simulations showed that the proposed SC ac-ac converter can achieve higher power efficiency and fewer circuit components than conventional SC ac-ac converters.
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