US 12,334,159 B2
Method and circuit for providing auxiliary power and storage device including the same
Chunghyun Ryu, Suwon-si (KR); and Jaewoong Choi, Suwon-si (KR)
Assigned to SAMSUNG ELECTRONICS CO., LTD., Suwon-si (KR)
Filed by Samsung Electronics Co., Ltd., Suwon-si (KR)
Filed on Nov. 24, 2023, as Appl. No. 18/518,651.
Application 18/518,651 is a continuation of application No. 16/846,648, filed on Apr. 13, 2020, granted, now 11,869,602.
Claims priority of application No. 10-2019-0083951 (KR), filed on Jul. 11, 2019.
Prior Publication US 2024/0096427 A1, Mar. 21, 2024
This patent is subject to a terminal disclaimer.
Int. Cl. G11C 5/14 (2006.01); G11C 16/30 (2006.01); H02J 7/00 (2006.01); H02J 7/34 (2006.01)
CPC G11C 16/30 (2013.01) [G11C 5/141 (2013.01); H02J 7/0048 (2020.01); H02J 7/0063 (2013.01); H02J 7/007182 (2020.01); H02J 7/345 (2013.01); H02J 2207/50 (2020.01)] 12 Claims
OG exemplary drawing
 
1. A method of providing an auxiliary power to a storage device including an auxiliary power supply circuit, a power management integrated circuit (PMIC), a controller, a first memory and a second memory, the method comprising:
receiving an external power at the auxiliary power supply circuit through a first power line;
providing the received external power to the PMIC of the storage device through a second power line;
converting the external power to a plurality of charging voltages;
providing a first charging voltage of the plurality of charging voltages to a charging circuit of the auxiliary power supply circuit, wherein the charging circuit includes at least one capacitor;
monitoring a change in capacitance of the charging circuit by measuring a voltage of the charging circuit;
storing information generated based on the change in capacitance of the charging circuit, in a voltage monitoring circuit of the auxiliary power supply circuit;
providing a second charging voltage of the plurality of charging voltages to the charging circuit when capacitance of the charging circuit is less than a first reference capacitance based on the information, wherein the second charging voltage is higher than the first charging voltage;
providing the auxiliary power generated based on the voltage of the charging circuit to the PMIC of the storage device through the second power line when sudden power off (SPO) occurs;
respectively providing the auxiliary power to the controller, the first memory and the second memory by through the PMIC of the storage device; and
measuring a discharge time taken to decrease from the voltage of the charging circuit to a first threshold voltage lower than the first charging voltage,
wherein the providing of the first charging voltage to the charging circuit is performed when the discharge time is longer than a first reference time interval, and
wherein the providing of the second charging voltage to the charging circuit is performed when the discharge time is shorter than the first reference time interval.