公开(公告)号：US20190074767A1

公开(公告)日：2019-03-07

申请号：US16183233

申请日：2018-11-07

Applicant: Huawei Technologies Co., Ltd.

Inventor： Jiake WANG ,  Liang CHEN

IPC: H02M3/158 ,  H03K17/687 ,  H02M1/32

Abstract: The present disclosure discloses a voltage conversion circuit, including: a first power transistor; a second power transistor, where the second power transistor is cut off when the first power transistor is conductive and is conductive when the first power transistor is cut off; a first energy storage element; a second energy storage element, a bleed module, configured to be coupled to the first power transistor, where when the first power transistor is cut off and a voltage of a source of the first power transistor reaches a source threshold, provide a current path for a current flowing from the source of the first power transistor to the ground. By means of the foregoing, a voltage difference between a drain and the source of the first power transistor can be decreased, thereby reducing a risk of burning out the first power transistor, and avoiding an increase in manufacturing costs.