US 11,742,753 B2
Electronic device having voltage divider adaptively changing voltage division ratio
Hangseok Choi, Gyeonggi-do (KR); and Sangwoo Kang, Gyeonggi-do (KR)
Assigned to Samsung Electronics Co., Ltd., Suwon-si (KR)
Filed by Samsung Electronics Co., Ltd., Gyeonggi-do (KR)
Filed on May 28, 2020, as Appl. No. 16/885,535.
Claims priority of application No. 10-2019-0062315 (KR), filed on May 28, 2019.
Prior Publication US 2020/0381994 A1, Dec. 3, 2020
Int. Cl. H02M 3/06 (2006.01); H02J 7/00 (2006.01); H02M 3/158 (2006.01); H01M 10/44 (2006.01); H01M 10/42 (2006.01); G05F 1/59 (2006.01); H02J 7/34 (2006.01)
CPC H02M 3/06 (2013.01) [H01M 10/4264 (2013.01); H01M 10/44 (2013.01); H02J 7/0045 (2013.01); H02J 7/00712 (2020.01); H02J 7/007182 (2020.01); H02M 3/158 (2013.01); G05F 1/59 (2013.01); H02J 7/007 (2013.01); H02J 7/345 (2013.01); H02J 2207/20 (2020.01)] 19 Claims
OG exemplary drawing
 
1. An electronic device comprising:
a rechargeable battery;
a connector configured to connect the electronic device with an external electronic device;
a voltage divider comprising:
a plurality of capacitors, wherein the plurality of capacitors comprise a first capacitor and a second capacitor,
a plurality of switches for switching an electrical path between each of the plurality of capacitors and the rechargeable battery,
an input terminal electrically connected with the connector and an output terminal electrically connected with the rechargeable battery,
wherein the voltage divider is configured to provide three or more voltage division ratios; and
a processor operably coupled with the voltage divider and the connector,
wherein the processor is configured to:
receive data indicating a first voltage of a first power from the external electronic device;
select a voltage division ratio from the three or more voltage division ratios, based at least in part on the data; and
control the plurality of switches based on the selected voltage division ratio, comprising:
when the first voltage is substantially triple a charging voltage of the rechargeable battery, control the plurality of switches to electrically connect the first capacitor and the second capacitor in series with respect to the rechargeable battery between the input terminal and the output terminal, and after the first capacitor is charged to a first charging voltage and the second capacitor is charged to a second charging voltage, electrically disconnect the input terminal from the first capacitor, the second capacitor, and the output terminal and electrically connect the first capacitor and the second capacitor in parallel with respect to the output terminal,
wherein the voltage divider is configured to:
charge the rechargeable battery with a second voltage by dividing the first voltage according to the selected voltage division ratio.