US 12,463,435 B2
Charging integrated circuit and operating method
Sungkyu Cho, Hwaseong-si (KR); Minkyu Kwon, Hwaseong-si (KR); Sungwoo Lee, Hwaseong-si (KR); Taejin Jeong, Incheon (KR); and Daewoong Cho, Yongin-si (KR)
Assigned to Samsung Electronics Co., Ltd., Suwon-si (KR)
Filed by SAMSUNG ELECTRONICS CO., LTD., Suwon-si (KR)
Filed on Nov. 6, 2023, as Appl. No. 18/502,827.
Application 18/502,827 is a continuation of application No. 17/035,921, filed on Sep. 29, 2020, granted, now 11,837,887.
Claims priority of application No. 10-2019-0125680 (KR), filed on Oct. 10, 2019.
Prior Publication US 2024/0079883 A1, Mar. 7, 2024
Int. Cl. H02J 7/00 (2006.01); H02J 50/80 (2016.01)
CPC H02J 7/00034 (2020.01) [H02J 7/0031 (2013.01); H02J 7/0036 (2013.01); H02J 50/80 (2016.02); H02J 2207/30 (2020.01)] 18 Claims
OG exemplary drawing
 
1. A method of operating a charging integrated circuit (IC) in a mobile device including a battery, the method comprising:
detecting a connection between the mobile device and an external power unit which is providing an external power signal;
activating a direct charger to charge the battery;
monitoring temperature information of the battery;
determining, based on the temperature information, a temperature of the battery;
based on the temperature of the battery exceeding a first threshold temperature, decreasing an amount of charging current;
based on the temperature of the battery being less than the first threshold temperature, bypassing the decreasing of the amount of charging current;
in response to detecting that a voltage level of the battery reaches a predetermined voltage level, performing a step constant current charging, wherein the step constant current charging comprises repeatedly decreasing the charging current when the voltage level of the battery reaches the predetermined voltage level; and
in response to detecting that the charging current is less than a threshold charging current, deactivating the direct charger and activating a switching charger.