Separate type switched-capacitor (SC) AC-DC converter

A switched-capacitor (SC) converter is in the spotlight as a coil less converter that consists of the capacitors and switches. However, it was difficult to output the large-current because the timing which can charge capacitors is short at an AC input. In this paper, we propose a separate type SC converter with an AC input. "Separate type" means an electric separation of input and output. This circuit configuration is based on series-parallel SC converter. The proposed circuit can suppress the capacity of capacitors by using high frequency charging system at the AC input. The validity of the circuit design is confirmed by SPICE simulations