US 11,742,689 B2
Power sensing circuit and electronic device including the same
Hyunsu Kim, Suwon-si (KR); and Hyoungseok Oh, Seoul (KR)
Assigned to SAMSUNG ELECTRONICS CO., LTD., Suwon-si (KR)
Filed by Samsung Electronics Co., Ltd., Suwon-si (KR)
Filed on Feb. 10, 2021, as Appl. No. 17/172,117.
Claims priority of application No. 10-2020-0016637 (KR), filed on Feb. 11, 2020; and application No. 10-2020-0121789 (KR), filed on Sep. 21, 2020.
Prior Publication US 2021/0249891 A1, Aug. 12, 2021
Int. Cl. H02J 7/04 (2006.01); H02J 50/80 (2016.01); H02J 7/00 (2006.01)
CPC H02J 7/04 (2013.01) [H02J 7/00032 (2020.01); H02J 50/80 (2016.02); H02J 2207/20 (2020.01)] 20 Claims
OG exemplary drawing
 
1. An electronic device configured to operate in a plurality of power modes, the electronic device comprising:
a power receiving circuit configured to receive wireless power from an external power transmitting device; and
a processor configured to control an operation of the electronic device,
wherein the plurality of power modes comprise a power charging mode in which the wireless power is continuously provided, a power hold mode including a state in which the wireless power is provided and a state in which the wireless power is cut off are periodically repeated in a ping period, and a power cutoff mode in which the wireless power is continuously cut off,
wherein the power receiving circuit is configured to generate a ping flag signal that alternates between a high level and a low level with the ping period in the power hold mode, and change the power mode based on a counting value obtained by counting particular level sections of the ping flag signal,
wherein the power receiving circuit comprises a power converting circuit configured to rectify the received wireless power and generate a rectified voltage, and
wherein the power receiving circuit is configured to generate a ping flag signal having a square wave, having a high level when the rectified voltage is above a certain value, and having a low level when the rectified voltage is less than a certain value.