Holdup Capacitor Energy Harvesting

摘要

The various embodiments described herein include circuits, methods and/or devices used to protect data in a storage device. In one aspect, a method includes performing a power fail operation on a first section of the storage device. The power fail operation includes supplying power, via an energy storage device, to the first section of the storage device, where the energy storage device is distinct from a power source used during normal operation of the storage device, and where supplying power via the energy storage device includes switching the output of the energy storage device from an output of a boost regulator to an input of the boost regulator. The power fail operation also includes performing data hardening on the first section of the storage device.

主权项

1. A circuit to protect data in a storage device, the circuit comprising:
an energy storage device; a boost regulator for boosting an input voltage; a load switch for selectively coupling a power source to the input of the boost regulator, wherein the load switch is configured to de-couple the power source from the input of the boost regulator in response to receiving a power fail signal; a selector for selectively coupling the energy storage device to either an input or an output of the boost regulator;
wherein the selector is configured to couple the energy storage device to the output of the boost regulator during normal operation of the storage device; andwherein the selector is further configured to couple the energy storage device to the input of the boost regulator in response to receiving a first signal; and a plurality of regulators coupled to the output of the boost regulator for supplying power to a first portion of the storage device.