公开(公告)号：US11463009B2

公开(公告)日：2022-10-04

申请号：US17103250

申请日：2020-11-24

Applicant: Huawei Digital Power Technologies Co., Ltd.

Inventor： Yiming Jiang

IPC: H02M3/158 ,  H02J7/34 ,  H02M1/00 ,  H02M3/07

Abstract: This application provides a flying capacitor charging method and apparatus, applied to a multi-level topology circuit, to provide a flying capacitor charging solution with a small occupation area and strong applicability. The circuit is connected to an input power source by using a first switch, and is connected to an output power source by using a second switch. A first end of a first capacitor in flying capacitors in the circuit is connected to a first electrode of a first semiconductor switch transistor, a second end of the first capacitor in the flying capacitors in the circuit is connected to a second electrode of a second semiconductor switch transistor, and a second electrode of the first semiconductor switch transistor is connected to a first electrode of the second semiconductor switch transistor by using a second capacitor. The second capacitor is an input capacitor, an output capacitor, or another flying capacitor.