Power-down protection circuit, data storage device and power-down protection method

Abstract

The invention relates to the technical field of data storage, and provides a power-down protection circuit, a data storage device and a power-down protection method. The working voltage of a solid-state driver is monitored in real time through a power supply detection circuit, and the capacity of a power storage capacitor is obtained through a capacitor management circuit, so that a power supply control circuit controls the power supply according to the capacity of the power storage capacitor; the input power supply is controlled to charge the power storage capacitor, the power failure protection mechanism is triggered when it is judged that power failure occurs in the solid-state driver, and a corresponding storage mode is adopted in combination with the capacity of the power storage capacitor to store the data, so that the effectiveness of the electric quantity of the power storage capacitor is ensured, and different strategies are adopted for writing of the data. Enough conversion tables of user data and data pages can be stored as much as possible under the condition of limited capacitance.

Description

technical field [0001] The present application relates to the technical field of data storage, and in particular to a power-down protection circuit, a data storage device and a power-down protection method. Background technique [0002] At present, in order to store data in a solid state drive (Solid State Disk or Solid State Drive, SSD) when a power failure occurs, a capacitor is usually added to the board of the SSD. When the SSD system detects a power-off signal, it supplies power to the SSD through the capacitor, so as to write the data sent by the host to the SSD or the data page table of the SSD into the Flash memory as much as possible. [0003] However, once the power signal detection is inaccurate, it will cause the firmware of the SSD to enter the power-down process by mistake, resulting in a series of error handling (for example, when the abnormal power supply is detected, the device controller and hardware controller will disconnect from the system bus. connecti...

AI Technical Summary

Problems solved by technology

[0005] The purpose of this application is to provide a power-down protection circuit, a data storage device and a power-down protection method, aiming to solve the problem of user data or data pages stored in the cache when the system is powered down in the existing solid-state drive power-down technology The problem of the missing mapping table

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