Single plate power backup circuit and single plate power system

Abstract

The invention relates to a single plate power-supply backup circuit and a single plate power-supply system, belonging to the field of power supply. The circuit comprises a detection switching unit, at least one redundancy power-supply backup unit, a feedback circuit, a resistivity switching unit and a backup power-supply input switching unit, wherein the detection switching unit detects main power-supply output voltage on the single plate and issues a switch enabling signal when a fault occurs; the at least one redundancy power-supply backup unit comprises a power-supply conversion module the output end of which is connected with the main power-supply output end through a first switch; the feedback circuit comprises serially-connected upper proportion resistor and lower proportion resistor; the resistivity switching unit switches the lower proportion resistor to a determined resistivity when a fault occurs and switches the output voltage of the power-supply conversion module to a fault main power-supply voltage; and the backup power-supply input switching unit is connected to a first switch upon reception of the switch enabling signal. The single plate power system performs redundancy power backup by utilizing the single plate power backup circuit. The invention can realize rapid switching among a plurality of needed voltages during power supply and can switch to a needed backup power supply, thereby greatly shortening the MTTR (Mean Time to Restoration) recovering time.

Description

technical field [0001] The invention relates to the technical field of power supply circuits, in particular to a single-board power supply backup circuit and a single-board power supply system. Background technique [0002] The power supply is the energy source of electronic products, and a stable and reliable power supply is a prerequisite for ensuring the stable and reliable operation of electronic products. The complexity of integrated circuit chips used in modern electronic products is getting higher and higher, the number of integrated circuit chips used is increasing, and the demand for power supplies is becoming more and more stringent. [0003] When designing an electronic system, it is often encountered that the external power supply cannot meet the power requirements of the electronic system. For example, the power supply voltage provided by the external power grid is AC 220V, and the voltage required by the single board of the electronic product in the electronic...

AI Technical Summary

Problems solved by technology

The output terminal of the power module uses a diode. Because the diode is affected by the ambient temperature, the voltage drop is unstable, resulting in the unstable voltage supplied by the power module to the load.

At the same time, this solution cannot realize intelligent detection of multiple different voltage power supplies and switching of backup power supplies, that is, real-time detection of system power supplies, and when a power failure is detected, switch to the corresponding backup power supply

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