US 12,316,154 B2
Electronic device stabilizing output current of charging circuit and controlling method thereof
Beomwoo Gu, Suwon-si (KR); Jaehyun Park, Suwon-si (KR); Kangho Byun, Suwon-si (KR); Jaesun Shin, Suwon-si (KR); and Chongmin Lee, Suwon-si (KR)
Assigned to SAMSUNG ELECTRONICS CO., LTD., Suwon-si (KR)
Filed by SAMSUNG ELECTRONICS CO., LTD., Suwon-si (KR)
Filed on Dec. 16, 2021, as Appl. No. 17/553,233.
Application 17/553,233 is a continuation of application No. PCT/KR2021/018641, filed on Dec. 9, 2021.
Claims priority of application No. 10-2020-0176512 (KR), filed on Dec. 16, 2020.
Prior Publication US 2022/0190621 A1, Jun. 16, 2022
Int. Cl. H02J 7/00 (2006.01); H02J 7/02 (2016.01); H02J 50/12 (2016.01); H02J 50/80 (2016.01)
CPC H02J 7/00714 (2020.01) [H02J 7/00034 (2020.01); H02J 7/02 (2013.01); H02J 50/12 (2016.02); H02J 50/80 (2016.02); H02J 2207/20 (2020.01)] 20 Claims
OG exemplary drawing
 
1. An electronic device comprising:
a battery;
a resonant circuit including a coil and a capacitor configured to wirelessly receive power;
a rectifying circuit configured to rectify an alternating current power provided from the resonant circuit to a direct current power;
a DC/DC converter configured to convert the direct current power provided from the rectifying circuit and to output the converted direct current power;
a charging circuit configured to charge the battery using the converted direct current power provided form the DC/DC converter;
a controller; and
a communication circuit,
wherein the controller is configured to:
control the charging circuit to set a magnitude of a reference current of the charging circuit to a first value, the first value being less than a maximum value of an output current of the charging circuit,
control the charging circuit to set the magnitude of the reference current to a second value greater than the first value, and measure a magnitude of an output current of the charging circuit after setting the magnitude of the reference current to the second value,
control, based on a difference between the measured magnitude of the output current and the second value being less than or equal to a specified set value, the charging circuit to set the magnitude of the reference current to a third value greater than the second value, and
control, based on the difference between the measured magnitude and the second value exceeding the specified set value, the charging circuit to set the magnitude of the reference current to the first value to receive wireless power.