公开(公告)号：US20220149658A1

公开(公告)日：2022-05-12

申请号：US17430907

申请日：2020-02-13

Applicant: SAMSUNG ELECTRONICS CO., LTD.

Inventor： Changhak O. ,  Hyungkoo CHUNG ,  Mincheol HA ,  Yongsang YUN

IPC: H02J50/10 ,  H02J50/80 ,  H02J7/00

Abstract: Disclosed is a power transmission device for wirelessly supplying power to an external electronic device, the power transmission device comprising: a coil configured to transmit a wireless signal to the electronic device based on a transmission power; a power generation circuit configured to supply, to the coil, the transmission power generated based on an input voltage; and a control circuit electrically connected to the coil and the power generation circuit, wherein the control circuit is configured: to receive information about charging power from the electronic device; to determine whether a voltage drop event related to a drop of the internal voltage of the electronic device has occurred, based on the difference between the transmission power and the charging power; and to regulate the level of the input voltage based on results obtained from the determination.