Circuit power fail safeguard device and protection method thereof

Abstract

The invention discloses a circuit power fail safeguard device and a protection method thereof. The device comprises a power fail detection circuit, a charging circuit and a discharging circuit, wherein the power fail detection circuit is connected with a circuit to be detected and is used for detecting whether the circuit to be detected has the phenomenon of power failure; the charging circuit isconnected with the power fail detection circuit and is used for storing electrical energy; and the discharging circuit is respectively connected with the charging circuit and the circuit to be detected and is used for supplying power for the circuit to be detected when the circuit to be detected has the phenomenon of power failure. The invention overcomes the defects of high cost and short service life caused by using a stand-by battery, and simultaneously expands the protection range and increases the protection for cache data and register data of a memory controller, thus being capable of supplying power for an internal memory and an internal memory controller under the condition that equipment suddenly have power down phenomenon, and ensuring the equipment to completely store the processed data and the related status messages. In addition, the invention also has the advantages of simple circuit, low cost, short charging time, high efficiency, small volume and long service life.

Description

technical field [0001] The invention relates to the field of circuits, in particular to a circuit power failure protection device and protection method. Background technique [0002] With the rapid development of the electronics industry, storage devices are used more and more widely. During use, the reading and writing of data is usually performed in the form of files, rather than directly operating on the address of the storage unit. In the event of a sudden power failure, if there is no effective protection, the data in the transmission process will be permanently lost, causing a devastating disaster to the safety of the equipment. Therefore, at present, most storage devices will add redundant designed power-down protection circuits to the circuit design. [0003] Power-down protection is a technology widely used in high-reliability systems. When the power supply system is abnormally powered off, it protects the data and information in the memory for a certain period of...

AI Technical Summary

Problems solved by technology

[0008] The technical problem to be solved by the present invention is to provide a circuit power-down protection device and protection method to solve the problems of complex and low-efficiency power-down protection circuits in the prior art

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