公开(公告)号：US20240223020A1

公开(公告)日：2024-07-04

申请号：US18610705

申请日：2024-03-20

Applicant: SAMSUNG ELECTRONICS CO., LTD.

Inventor： Sangwook LEE ,  Kyungmin LEE ,  Bohwan CHOI ,  Jinsoo CHOI ,  Sungbum PARK

IPC: H02J50/60 ,  H02J50/12 ,  H02J50/80

CPC classification number: H02J50/60 ,  H02J50/12 ,  H02J50/80

Abstract: The disclosure relates to an electronic device and a method for detecting a foreign body, wherein a control circuit of the electronic device may be configured to: supply transmission power to a power transmission circuit; identify, on the basis of a low power wireless communication signal, whether an external device is present in a partial area of the externally exposed surface of the electronic device, which corresponds to a resonant circuit; on the basis of the presence of the external device, apply a high frequency current to the resonant circuit and transmit transmission power generated in the resonant circuit to the external device; obtain analog digital converter samples in a half-wave rectified direct current interval of a direct current link voltage corresponding to a transmission current detected in the power transmission circuit; and detect a foreign body on the basis of the analog digital converter samples.

公开(公告)号：US20220158492A1

公开(公告)日：2022-05-19

申请号：US17523476

申请日：2021-11-10

Applicant: Samsung Electronics Co., Ltd.

Inventor： Beomwoo GU ,  Jaehyun PARK ,  Chongmin LEE ,  Bohwan CHOI

IPC: H02J50/12 ,  H01F27/42

Abstract: A wireless power receiver receiving power from a wireless power transmitter is provided. The receiver includes a resonance circuit, a rectifier circuit, and a driver circuit. The resonance circuit includes first and second coils and a first capacitor. The rectifier circuit includes first and second rectifier circuits. The first rectifier circuit includes first through fourth MOSFETs. Sources of the first and second MOSFETs are connected to ends of a resonator including the first coil and the first capacitor. Sources of the third and fourth MOSFETs are connected to ground. The driver circuit is connected to gates of the first through fourth MOSFETs, When the driver circuit switches off the first and second MOSFETs and switches on the third and fourth MOSFETs, as currents are induced in the resonator and the second coil, the resonance circuit receives the wireless power, and the current induced in the second coil is rectified by the second rectifier circuit.