Patent ID: 11869602
Assignee: SAMSUNG ELECTRONICS CO., LTD.
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC G  H | IPC G  H

Claim 13:
14. A storage device system comprising:
an auxiliary power supply including a switching circuit and a charging circuit and configured to:
receive an external power through a first power line,
generate a main power and an auxiliary power based on the external power, the charging circuit including at least one capacitor, and
provide the received external power or the auxiliary power through a second power line to a solid state drive (SSD); and
a controller of a main system configured to control an operation of the auxiliary power supply,
wherein the auxiliary power supply is further configured to charge the charging circuit with a first charging voltage,
wherein the storage device system is configured such that when capacitance of the charging circuit is less than a first reference capacitance, the auxiliary power supply charges the charging circuit with a second charging voltage higher than the first charging voltage, and
wherein, when sudden power off (SPO) occurs and the external power is not normally supplied to the auxiliary power supply through the first power line, the storage device system is configured such that:
the auxiliary power supply provides the auxiliary power through the second power line to the SSD for retaining data stored in the SSD, and
the switching circuit blocks the external power from being output to the second power line.