US 12,142,317 B2
Storage device including auxiliary power supply and method of operating the same
Hojin Chun, Seoul (KR); Minsung Kil, Hwaseong-si (KR); and Hyoungtaek Lim, Seoul (KR)
Assigned to Samsung Electronics Co., Ltd., Gyeonggi-do (KR)
Filed by Samsung Electronics Co., Ltd., Suwon-si (KR)
Filed on Jul. 28, 2022, as Appl. No. 17/876,077.
Claims priority of application No. 10-2021-0178878 (KR), filed on Dec. 14, 2021.
Prior Publication US 2023/0186988 A1, Jun. 15, 2023
Int. Cl. G11C 5/14 (2006.01); G11C 14/00 (2006.01)
CPC G11C 14/0018 (2013.01) [G11C 5/141 (2013.01)] 19 Claims
OG exemplary drawing
 
1. A storage device, comprising:
a main system;
a power loss protection integrated circuit (PLP IC) configured to provide output power to the main system based on external power or internal power; and
an auxiliary power supply configured to provide the internal power to the PLP IC,
wherein the main system is configured to operate based on the output power and to operate in a dump mode in which data is backed up in response a determination that at least one of a first condition or a second condition is satisfied,
wherein the PLP IC is configured to provide the output power to the main system based on the internal power in response to a sudden power off (SPO) occurring,
wherein the first condition is determined to be satisfied in response to a determination that
the SPO occurs so that the output power is provided to the main system based on the internal power, and
an SPO time is longer than a maximum filtering time,
wherein the second condition is determined to be satisfied in response to a determination that
the SPO occurs so that the output power is provided to the main system based on the internal power, and
a voltage level of the internal power provided by the auxiliary power supply is lower than a voltage level of a threshold voltage, and
wherein the main system is configured to monitor the voltage level of the internal power based on monitoring a change in capacitance of the auxiliary power supply.