Switched-capacitor converter with zero-voltage and zero-current switching control and control method thereof

Abstract

and a plurality of switches configured to perform periodic switching between a plurality of switching phases to convert a first voltage into a second voltage, or vice versa. Upon entering one of the switching phases, referred to as the first switching phase, the first terminal of at least one of the flying capacitors is turned on earlier than its second terminal to electrically connect to a node corresponding to the first switching phase, thereby forming a required coupling relation for the phase. This configuration allows the second terminal to gradually approach a zero-voltage switching (ZVS) before being subsequently turned on, which enables the corresponding switch to operate under ZVS condition. As a result, switching loss is reduced and power conversion efficiency is improved.

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