Lightning protection circuit

A lightning protection circuit and lightning protection technology, applied in the field of communication, can solve problems such as unreachable, high protection level, and inability to ensure reliable operation of equipment, and achieve the effect of reducing the number and high-standard lightning protection

Active Publication Date: 2011-06-29
HUAWEI MACHINERY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this technology has two disadvantages: 1. A large number of protective devices must be added to each port, and the packages of these protective devices are very large. When there are many ports, a large number of printed circuit boards (PCB, Printed Circuit Board) must be required ) space, which contradicts the development of PSE equipment towards miniaturization (ports are becoming more and more dense, and PCB layout and wiring are becoming more and more compact), which makes it difficult for this solution to be widely used on PSE equipment with high-density POE ports Applicatio

Method used

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Examples

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Example Embodiment

[0030] Example one

[0031] The lightning protection circuit provided by the embodiment of the present invention specifically includes: a lightning protection device for protecting a PoE port from surge overvoltage; the lightning protection device includes: a first common mode protection device, a second common Mode protection device and differential mode protection device, the first common mode protection device is connected between the first power output line and the common terminal, or the first common mode protection device is connected between the first power input line and the common terminal, wherein , The first power output line is a common power supply line connecting the first output end of the PoE power supply control circuit to the interface area, and the first power input line is a power supply line connecting the first input end of the PoE power control circuit to the PoE power supply; Two common mode protection devices are connected between the second power output ...

Example Embodiment

[0039] Example two

[0040] The lightning protection circuit provided by the embodiment of the present invention specifically includes: a lightning protection device for protecting a PoE port from surge overvoltage; the lightning protection device includes: a first common mode protection device, a second common Mode protection device and differential mode protection device, wherein the first common mode protection device is connected between the first power input line and the common terminal, or the first common mode protection device is connected between the first power output line and the common terminal , The first power input line is a power supply line connecting the first input end of the PoE power supply control circuit to the PoE power supply, and the first power output line is a common power supply line connecting the first output end of the PoE power supply control circuit to the interface area; Two common mode protection devices are connected between the second power i...

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PUM

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Abstract

The embodiment of the invention discloses a lightning protection circuit. In the lightning protection circuit, a common-mode protection device is arranged on a common power supply line connected with the output end of a power over Ethernet (PoE) power control circuit and an interface area or on a power supply line connected with the input end of the PoE power supply control circuit and a PoE power supply, so that the number of protection devices is reduced as much as possible; therefore, the space of a printed circuit board (PCB) is saved and the design cost of a PoE port is reduced; and simultaneously because the protection devices are connected to a common end of all interface areas, great surge energy can be discharged to realize high-specification lightning protection.

Description

technical field [0001] The invention relates to the technical field of communication, in particular to a lightning protection circuit. Background technique [0002] Power over Ethernet (PoE, Power over Ethernet) refers to the transmission of data signals for some terminals based on the interconnection protocol (IP, Internet Protocol) between networks on the existing Ethernet Cat. At the same time, it can also provide DC power technology for such devices. PoE technology uses a common Ethernet cable to transmit Ethernet signals and DC power at the same time, and integrates power and data in the same cable for transmission. PoE technology can be used for Various network terminals, such as: IP phones, wireless access points, portable device chargers, credit card machines, cameras, data acquisition equipment, etc. provide reliable and centralized power supply. Network terminals do not need an external power supply, only one network cable is connected It can work normally, and ba...

Claims

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Application Information

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IPC IPC(8): H02H9/04H02H9/06
CPCH02H9/042
Inventor 朱跃生王玮峰戴养哩
Owner HUAWEI MACHINERY
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