Power supply current detection circuit and system

A technology of current detection circuit and power supply, applied in the direction of measuring current/voltage, measuring device, measuring electric variable, etc., can solve the problem of high cost

Pending Publication Date: 2020-08-21
GUANGDONG INSPUR BIG DATA RES CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] However, considering the possible overcurrent of the hardware circuit during the sampling process, the circuit components in the hardware circuit are required to be able to withstand large current impacts, resulting in higher costs

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Embodiment Construction

[0029] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0030] The input overcurrent protection mechanism is usually sampled by the hardware circuit and input to the software for calculation and analysis. However, considering the possible overcurrent of the hardware circuit during the sampling process, the circuit components in the hardware circuit are required to be able to withstand a large current impact, resulting in high cost. The application uses a transformer to isolate the main circuit of the power supply a...

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Abstract

The invention discloses a power supply current detection circuit and a current detection system. The power supply current detection circuit comprises a transformer, a matching circuit and an operational amplifier circuit; wherein a first end of a primary winding of the transformer is connected to a direct current signal, and a second end of the primary winding of the transformer is connected to apower supply main circuit; the direct current signal is output after a host power supply is rectified by a rectifier bridge; a first end of a secondary winding of the transformer and a first end of the primary winding are dotted terminals mutually, a second end of the secondary winding is connected to a grounding end, two ends of the secondary winding are respectively connected to two input ends of the matching circuit, and the output end of the matching circuit is connected to the input end of the operational amplifier circuit; and the output end of the operational amplifier circuit is connected to the input pin of an overcurrent protection chip. According to the invention, the power supply main circuit and a sampling circuit are isolated into two parts by using the transformer, so that acurrent signal can be accurately and effectively sent to the overcurrent protection chip, elements are not required to bear large current impact, and the element cost of the current detection circuitis reduced.

Description

technical field [0001] The invention relates to the field of power supply protection, in particular to a current detection circuit and system of a power supply. Background technique [0002] At present, the server industry is developing more and more rapidly, and the server power supply is an important part of the server, and its power supply stability is increasingly emphasized. Current state and overcurrent protection are an important direction of power supply stability detection. The input overcurrent protection mechanism is usually sampled by hardware circuits and input into software for calculation and analysis. [0003] However, considering the possible overcurrent of the hardware circuit during the sampling process, the circuit components in the hardware circuit are required to be able to withstand a large current impact, resulting in high cost. Therefore, how to provide a low-cost solution to effectively realize current sampling and overcurrent protection is a probl...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R19/165
CPCG01R19/16571
Inventor 毕勇飞
Owner GUANGDONG INSPUR BIG DATA RES CO LTD
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