Capacitor defect monitoring device, method of monitoring capacitor defect using the device and storage device using the device

A method of monitoring capacitor defect, the method comprising:

• outputting, by a power integrated circuit, an auxiliary power, wherein the power integrated circuit is configured to output one of a primary power and the auxiliary power, wherein the auxiliary power is provided using an auxiliary power storage circuit, and wherein the primary power is provided from an external source, the power integrated circuit comprising a selection circuit and a connection circuit, the selection circuit selecting one of the primary power and the auxiliary power, and the connection circuit providing a connection path between the selection circuit and the auxiliary power storage circuit;
• changing a resistance value of the connection path in an auxiliary power monitoring mode;
• monitoring changes in voltage values of one or more storage capacitors of the auxiliary power storage circuit based on changing the resistance value of the connection path;
• and
• determining a defect type of the auxiliary power storage circuit based on the monitoring.

A storage device comprising:

• a power loss protection integrated circuit (PLP IC) configured to output one of a primary power and an auxiliary power;
• and
• an auxiliary power storage circuit configured to provide the auxiliary power and comprising one or more storage capacitors,
• wherein the PLP IC comprises:
• a selection circuit configured to select one of the primary power and the auxiliary power;
• a connection circuit configured to provide a connection path between the selection circuit and the auxiliary power storage circuit;
• and
• a defect type determination circuit configured to monitor changes in voltage values of the one or more storage capacitors to determine a defect type of the auxiliary power storage circuit based on changing a resistance value of the connection path.