A power overrun detection module without reference source

Abstract

The invention discloses a power supply overrun detection module without a reference source, which is characterized in that it includes an upper limit detection submodule and a lower limit detection submodule connected to the power supply; the upper limit detection submodule and the lower limit detection submodule are the same Each includes a voltage sampling circuit, a voltage comparison circuit, and a power-down protection program starting circuit; the input end of the voltage sampling circuit is connected to the power supply, and the output end of the voltage sampling circuit is electrically connected to the input end of the voltage comparison circuit; The output end of the voltage comparison circuit is electrically connected with the input end of the power-down protection program starting circuit; the output end of the power-down protection program starting circuit is electrically connected with the power-down protection circuit of the system. The invention does not use a reference source chip, reduces corresponding supporting chips, and has lower fault failure rate; overvoltage and undervoltage early warning signal output can be used to start a power-down protection program. It has the advantages of strong versatility, small size, low power consumption and high reliability, and is especially suitable for the status monitoring of 24V power supply.

Description

technical field [0001] The invention relates to a non-reference source voltage overrun detection module applied in fast switching of redundant power supplies. Background technique [0002] As the electronic industry has higher and higher requirements for product stability and reliability, marine automation products, whether industrial or civil, are no longer simple function realization. Reliability and security are more and more valued by developers. For electronic products, the power supply is the source of life for the entire electronic product. The stability and reliability of the power supply determines the availability of the electronic product, so the power processing circuit with switching function can well solve the problem of power supply reliability. [0003] In the past application development, when the system supplies power to each module, most of the modules have isolated the system power supply, which can ensure the stability of the back-end power supply withi...

AI Technical Summary

Problems solved by technology

[0003] In the past application development, when the system supplies power to each module, most of the modules have isolated the system power supply, which can ensure the stability of the back-end power supply within a certain range, but in different environments and load conditions, the system power supply will produce Fluctuation, when the fluctuation range exceeds the design requirements of the isolated power supply, the load will work abnormally or even not work

In this case, some operating data of the product will not be saved in time, or some control processes will be interrupted suddenly, resulting in damage to external devices

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