Auxiliary power supply and user device including the same

摘要

A user device is provided. The device includes a main power supply, and an auxiliary power supply. The main power supply provides a main power. The auxiliary power supply cuts off the main power according to a power level of the main power supply and provides an auxiliary power upon Sudden Power-Off (SPO).

主权项

1. A solid state drive, comprising:
at least one memory; a controller configured to control the at least one memory; and an auxiliary power system configured to provide auxiliary power to the at least one memory,
the auxiliary power system including,
a first one directional device disposed in a sole power path connecting a main power supply to the controller, the first one directional device configured to permit current to flow only in a first direction, the first direction being from the main power supply to the controller,an auxiliary power source configured to be charged by supplying a power of the main power supply through a charging current path from the main power supply to the auxiliary power source, anda second one directional device configured to permit current to flow in a second direction along a discharging current path, the second direction being from the auxiliary power source to the controller, and wherein the charging current path is different from the discharging current path, and the first one directional device is disposed on the sole power path before the charging current path splits off of the sole power path.