公开(公告)号：US20220014092A1

公开(公告)日：2022-01-13

申请号：US17484005

申请日：2021-09-24

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Jie Ren ,  Xue Zhang ,  Weiyang Zhao

IPC: H02M1/42 ,  H02M1/00

Abstract: A current detection apparatus includes: a first induction circuit including a first auxiliary inductor that is coupled to the power inductor; a second induction circuit including a second auxiliary inductor that is coupled to the power inductor; a detection node between the first induction circuit and the second induction circuit, where the detection node outputs a detection signal; a first switching transistor that is connected in parallel to the first induction circuit; and a second switching transistor that is connected in parallel to the second induction circuit. When an alternating current power supply of a circuit in which the power inductor is located is positive, the first switching transistor is turned on, and the second switching transistor is turned off. When the alternating current power supply is negative, the second switching transistor is turned on, and the first switching transistor is turned off.