公开(公告)号：US20210305844A1

公开(公告)日：2021-09-30

申请号：US17259351

申请日：2019-07-31

Applicant: SAMSUNG ELECTRONICS CO., LTD.

Inventor： Shinwook CHOI ,  Jeongil KANG ,  Moonyoung KIM

IPC: H02J50/12 ,  H02J50/00 ,  H02J50/80 ,  H02J7/02 ,  H04B5/00

Abstract: A wireless power reception device is disclosed. The wireless power reception device comprises: a reception coil which receives power from a wireless power transmission device; a rectifier which rectifies the received power; an output terminal which outputs the rectified power to an external electronic device; a first switch which is provided between the rectifier and the output terminal; and a controller which identifies the intensity of the rectified power, turns on the first switch so as for the received power to be supplied to the output terminal if the intensity of the rectified power falls within a preset range, and turns off the first switch so as to block the supply of the rectified power to the output terminal if the intensity of the rectified power does not fall within the preset range.

公开(公告)号：US20200021183A1

公开(公告)日：2020-01-16

申请号：US16456263

申请日：2019-06-28

Applicant: Samsung Electronics Co., Ltd.

Inventor： Shinwook CHOI ,  Jeongil KANG ,  Moonyoung KIM

IPC: H02M1/32 ,  H02M7/21 ,  H02M7/04 ,  H02M1/42 ,  H01R24/60

Abstract: Disclosed is an electronic apparatus including a connector configured to connect the electronic device to an external apparatus; and a power circuit configured to supply power to the connected external apparatus, the power circuit including: a transformer configured to output an output voltage by varying a level of an input voltage; a switching unit comprising a switch configured to perform switching operation for the transformer; a controller configured to control the switching unit to match a level of the output voltage with the external apparatus; and an auxiliary power circuit including an auxiliary winding, and configured to supply power to the controller based on a voltage induced in the auxiliary winding by the output voltage and to decrease the number of turns of the auxiliary winding based on the output voltage having a level greater than or equal to a predetermined value.