Power supply power failure monitoring circuit

By designing a power supply power outage monitoring circuit including energy storage delay unit, detection unit and signal output unit, the problem of high cost and complexity of the power supply voltage monitoring system in the prior art is solved, and the simplicity, reliability and application scope of the circuit are improved.

CN119718042APending Publication Date: 2025-03-28GUANGZHOU GAOXING INTERNET CONNECTION TECH CO LTD
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Patent Information

Application Number
CN202411853741.4
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2024-12-16
Publication Date
2025-03-28

AI Technical Summary

Technical Problem

In the prior art, the power supply voltage monitoring and reset system has high cost, complex peripheral circuits, high power consumption and a narrow range of application.

Method used

A power supply power outage monitoring circuit including an energy storage delay unit, a detection unit and a signal output unit is designed. By sampling the voltage of the power supply in real time and detecting whether the power supply is normally powered according to the preset threshold voltage, it outputs high and low level signals to the rear-level system circuit to control shutdown and data storage.

Benefits of technology

It realizes the simplicity, high reliability, low cost and wide application range of power supply power outage monitoring circuit, and can be flexibly applied to various circuits that require monitoring voltage.

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Abstract

The invention provides a power supply failure monitoring circuit. The circuit comprises an energy storage delay unit, a detection unit and a signal output unit, one end of the energy storage delay unit is connected to a power supply; the input end of the detection unit is connected with a power supply, the first output end of the detection unit is connected with the first input end of the signal output unit, the second output end of the detection unit is connected with the second input end of the signal output unit, and the output end of the signal output unit is connected with a post-stage system circuit; the energy storage delay unit adjusts a window period of power-down shutdown of the system; the detection unit detects the voltage of the power supply and transmits a trigger signal to the signal output unit, so that the signal output unit is switched on or switched off under the trigger of the trigger signal, and the trigger signal is used for indicating whether the power supply is powered off; the signal output unit outputs a high-level signal to the post-stage system circuit when being disconnected, and outputs a low-level signal to the post-stage system circuit when being connected. The whole circuit is simple and efficient in design, low in cost and high in universality.
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