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Power device detection circuit, power device detection method and power device

A technology of power equipment and detection circuit, applied in the field of power equipment and power equipment detection circuit, can solve the problem of difficult debugging of PD detection scheme, and achieve the effect of difficult debugging, easy implementation and easy debugging.

Active Publication Date: 2015-10-21
BOWEI TECH
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  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to provide a power device detection circuit, a method for detecting power devices, and a power device, so as to solve the technical problem that the PD detection scheme in the prior art is difficult to debug, and the PD detection scheme in the prior art can only be used for Technical problems in the use of power supply equipment around 40V ~ 55V

Method used

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  • Power device detection circuit, power device detection method and power device
  • Power device detection circuit, power device detection method and power device
  • Power device detection circuit, power device detection method and power device

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Embodiment Construction

[0018] In order to solve the technical problem that the PD detection scheme in the prior art is difficult to debug, and the technical problem that the PD detection scheme in the prior art can only be used by power supply equipment of about 40V ~ 55V, the embodiment of the present invention provides a power equipment The detection circuit, the method for detecting the power equipment and the power equipment, the general idea is as follows:

[0019] Including the PD detection circuit and the PD end part, the PD detection circuit is applied to the PoE device, so that the PoE device with the PD discrimination circuit can correctly detect whether the load is the corresponding PD end with the PD detection circuit or a general Ethernet port, so as to determine Whether the PSE provides external power.

[0020] Through the above solution, the PD discrimination circuit can correctly detect whether the load has a corresponding PD feedback circuit, is not affected by the voltage, can supp...

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Abstract

The invention discloses a power device detection circuit, a power device detection method and a power device, applies to the power supply technical field and solves the technical problems that it is difficult to debug a PD detection scheme and the PD detection scheme can only be applied to a power supply device about 40-55 V in the prior art. The power device detection circuit is applied to a PoE device. The power device detection circuit comprises a PD polling circuit, a PD judgment circuit, a first Ethernet port, a power output switch and a power circuit change-over switch. The technical scheme can support the use of the power supply device lower than 40 V, and flexible application is realized; and the adopted feedback judgment circuit is easy to debug, and the scheme is easier to realize.

Description

technical field [0001] The invention relates to the technical field of power supply, in particular to a power device detection circuit, a power device detection method and the power device. Background technique [0002] Without making any changes to the existing Ethernet Cat.5 cabling infrastructure, it can transmit data for some IP (Internet Protocol, Internet Protocol)-based terminals (such as IP phones, wireless LAN access points, network cameras, etc.) At the same time as the signal, it can also provide DC power supply technology for such devices. PoE (Power Supply Equipment, Power over Ethernet) technology can guarantee the normal operation of the existing network while ensuring the safety of the existing structured wiring, and minimize the cost. [0003] At present, the PoE standards in the industry mainly include IEEE 802.3af and IEEE802.3at, which support PD (Power Device, power device) power consumption up to 25.5w. In addition, there is also non-standard LTPoE++ ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R31/00
Inventor 李汝虎蔡舒宏欧阳宁
Owner BOWEI TECH
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