US 11,990,767 B2
Near field communication integrated circuit and wireless communication device including the same
In-hyuk Kim, Hanam-si (KR); Seok-hyun Kim, Hwaseong-si (KR); and Young-seok Kim, Gwangju-si (KR)
Assigned to Samsung Electronics Co., Ltd., Gyeonggi-do (KR)
Filed by Samsung Electronics Co., Ltd., Suwon-si (KR)
Filed on Jun. 21, 2021, as Appl. No. 17/352,684.
Application 17/352,684 is a continuation of application No. 16/258,958, filed on Jan. 28, 2019, granted, now 11,043,849, issued on Jun. 22, 2021.
Claims priority of application No. 10-2018-0035365 (KR), filed on Mar. 27, 2018.
Prior Publication US 2021/0313839 A1, Oct. 7, 2021
This patent is subject to a terminal disclaimer.
Int. Cl. H02J 7/00 (2006.01); G06F 1/26 (2006.01); G06F 1/3234 (2019.01); H02J 50/12 (2016.01); H02J 50/80 (2016.01); H04B 5/00 (2006.01); H04B 5/72 (2024.01); H04B 5/79 (2024.01); G06F 1/28 (2006.01); H04W 4/80 (2018.01); H04W 52/02 (2009.01)
CPC H02J 50/12 (2016.02) [G06F 1/263 (2013.01); G06F 1/325 (2013.01); H02J 7/0068 (2013.01); H02J 50/80 (2016.02); H04B 5/00 (2013.01); H04B 5/72 (2024.01); H04B 5/79 (2024.01); G06F 1/28 (2013.01); H04W 4/80 (2018.02); H04W 52/0251 (2013.01)] 18 Claims
OG exemplary drawing
 
1. A wireless communication device comprising:
an internal device configured to support a near field communication (NFC) operation; and
an NFC integrated circuit connected to a power management integrated circuit (PMIC) that is configured to supply a first supply voltage to the NFC integrated circuit and connected to a battery that is configured to supply a second supply voltage to the NFC integrated circuit, the battery being internal to the wireless communication device, the NFC integrated circuit configured to,
when a state of the NFC integrated circuit transitions from a first state to a second state, open a first power supply path from the PMIC to the internal device to inhibit supply of the first supply voltage to the internal device and form a second power supply path from the battery to the internal device, and
when the state of the NFC integrated circuit transitions from the second state to the first state, control the first and second power supply paths to the internal device based on whether or not the first supply voltage from the PMIC is applied by closing the second power supply path while the first power supply path is open to supply the internal device with only the second supply voltage from the battery, in response to the PMIC applying the first supply voltage to the NFC integrated circuit.