CN103051190B - Be applied to the Power over Ethernet circuit of network monitoring device - Google Patents
Be applied to the Power over Ethernet circuit of network monitoring device Download PDFInfo
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- CN103051190B CN103051190B CN201210526534.9A CN201210526534A CN103051190B CN 103051190 B CN103051190 B CN 103051190B CN 201210526534 A CN201210526534 A CN 201210526534A CN 103051190 B CN103051190 B CN 103051190B
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- mosfet
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Abstract
Be applied to a Power over Ethernet circuit for network monitoring device, comprise: PD controller, DC-DC controller, power switch FET pipe, transformer, rectification circuit and voltage detecting circuit; In PD controller, be provided with inner MOSFET manage; DC-DC controller, power switch FET pipe is connected successively with transformer, forms dc-dc; Rectification circuit is by voltage detecting circuit feedback link to DC-DC controller, and outside MOSFET pipe is in parallel with the inside MOSFET pipe in PD controller, and outside MOSFET pipe is connected with level shifting circuit, and PD controller is also connected to level shifting circuit simultaneously.Increase overcurrent capability between control inputs GND and the GND of level shifting circuit, save 80% power consumed at PD controller, PD controller can not be damaged because of overheated, and then increase the exportable maximum power of circuit.
Description
Technical field
The present invention relates to the technical field of network monitoring, is a kind ofly have high stability, the highly integrated Power over Ethernet circuit being applied to network monitoring device specifically.
Background technology
Power over Ethernet (being called for short POE) technology is a kind of power delivery mode of practicality and high efficiency, it allows IP network equipment to be powered by POE switch, and carry out transmission of IP data by identical cable, and power supply need not be provided by arrangement cable specially, simplify the installation of network monitoring product, reduce the cost of installation and maintenance, and improve the stability of IP video monitoring system---along with this advantage, POE network monitoring product formally marches toward security protection stage and obtains the strong interest in market.
Along with the market of network monitoring product constantly expands, the continuous renewal of technology, user can not be satisfied with simple video monitoring, and to detect mobile object action, turn to and the demand such as amplification more strong, these power just requiring network monitoring product electric power system to provide are enough large, and the network monitoring product being therefore furnished with high-power POE module is also more outstanding at field of video monitoring institute role.For powerful network monitoring security product, high definition image quality, high integration, intellectuality and low cost always are the difficult problem awaiting urgently solving, and solve the breakthrough that these difficult problems depend on the technology such as POE powers.
At present, in international technology category field, POE power supply technique still needs perfect further, and on market, the POE power supply plan of existing network monitoring product has two kinds, and one is low-power one is high power.Lower powered Power over Ethernet circuit (POE circuit), although cost is low but can not meet high-power network monitoring product requirement, when input voltage strengthens, because conversion efficiency is low, self needs to consume certain energy, self circuit can be burnt out.Although high power POE circuit can meet high-power network monitoring product requirement, cost is higher.The development of these factors to network monitoring product plays great inhibition, high reliability, highly integrated, intelligent, automation and low cost can not be realized in all directions, to offender with opportunity, be therefore badly in need of the high-power Power over Ethernet circuit that research and development form high, highly integrated, the automation of a set of reliability, low cost.
Summary of the invention
The technical problem to be solved in the present invention is to provide a kind ofly has high stability, the highly integrated Power over Ethernet circuit being applied to network monitoring device.
The technical scheme that the present invention takes for the technical problem existed in solution known technology is:
The Power over Ethernet circuit being applied to network monitoring device of the present invention, comprising: PD controller, DC-DC controller, power switch FET pipe, transformer, rectification circuit and voltage detecting circuit; Voltage is input to PD controller, is provided with inner MOSFET and manages in PD controller; DC-DC controller, power switch FET pipe is connected successively with transformer, and form dc-dc, PD controller is connected with dc-dc; Transformer is connected with rectification circuit, by the outside output voltage of rectification circuit, rectification circuit passes through voltage detecting circuit feedback link to DC-DC controller, also comprise outside MOSFET to manage and level shifting circuit, outside MOSFET pipe is in parallel with the inside MOSFET pipe in PD controller, outside MOSFET pipe is connected with level shifting circuit, and PD controller is also connected to level shifting circuit simultaneously.
The present invention can also adopt following technical measures:
The connection of earth terminal GND and disconnection in earth terminal GND and level shifting circuit in outside MOSFET pipe parallel with one another and inner MOSFET pipe control inputs.
Described level shifting circuit provides operating voltage for outside MOSFET.
The advantage that the present invention has and good effect are:
Of the present inventionly be applied in the Power over Ethernet circuit of network monitoring device, outside MOSFET pipe is in parallel with the inside MOSFET pipe in PD controller, the connection of the GND of control inputs GND and level shifting circuit and disconnection, increase overcurrent capability between control inputs GND and the GND of level shifting circuit, save 80% power consumed at PD controller, PD controller can not be damaged because of overheated, and then increase the exportable maximum power of circuit.This circuit, on the basis of primary circuit cost, only increases a small amount of cost and just extends peak power output to 80W, greatly improve competitiveness and the cost performance of product.There is the advantages such as high stability, high integration, high reliability, automation, low cost.
Accompanying drawing explanation
Fig. 1 is the schematic diagram being applied to the Power over Ethernet circuit of network monitoring device of the present invention.
Embodiment
Referring to drawings and Examples, the present invention will be described in detail.
Fig. 1 is the schematic diagram being applied to the Power over Ethernet circuit of network monitoring device of the present invention.
As shown in Figure 1, the Power over Ethernet circuit being applied to network monitoring device of the present invention, comprising: PD controller, DC-DC controller, power switch FET pipe, transformer, rectification circuit and voltage detecting circuit; Voltage is input to PD controller, is provided with inner MOSFET and manages in PD controller; DC-DC controller, power switch FET pipe is connected successively with transformer, and form dc-dc, PD controller is connected with dc-dc; Transformer is connected with rectification circuit, by the outside output voltage of rectification circuit, rectification circuit passes through voltage detecting circuit feedback link to DC-DC controller, also comprise outside MOSFET to manage and level shifting circuit, outside MOSFET pipe is in parallel with the inside MOSFET pipe in PD controller, outside MOSFET pipe is connected with level shifting circuit, and PD controller is also connected to level shifting circuit simultaneously.
The connection of earth terminal GND and disconnection in earth terminal GND and level shifting circuit in outside MOSFET pipe parallel with one another and inner MOSFET pipe control inputs.
Level shifting circuit provides operating voltage for outside MOSFET.
When there being input voltage vin to enter, PD controller carries out voltage detecting, power classification and powers on, managed by the outside MOSFET of the inside MOSFET pipe in PD controller and parallel connection, the connection of the GND of control inputs GND and level shifting circuit and disconnection, export to the dc-dc of rear end afterwards.Dc-dc is primarily of DC-DC controller, power switch FET and transformer composition, and between its 42V-67V mainly PSE provided, voltage transitions becomes the relatively low voltage of 12V.Dc-dc passes through PWM, realize the stored energy to transformer and release, the energy of transformer release passes to rectification circuit, after carrying out filter rectification, pass to voltage detecting circuit to detect, and feed back to DC-DC controller, and if there is deviation to regulate through DC-DC controller again, final output Vout output voltage.
The above, it is only preferred embodiment of the present invention, not any pro forma restriction is done to the present invention, although the present invention with preferred embodiment openly as above, but, and be not used to limit the present invention, any those skilled in the art, do not departing within the scope of technical solution of the present invention, certainly the technology contents of announcement can be utilized to make a little change or modification, become the Equivalent embodiments of equivalent variations, in every case be the content not departing from technical solution of the present invention, according to any simple modification that technical spirit of the present invention is done above embodiment, equivalent variations and modification, all belong in the scope of technical solution of the present invention.
Claims (1)
1. be applied to a Power over Ethernet circuit for network monitoring device, comprise: PD controller, DC-DC controller, power switch FET pipe, transformer, rectification circuit and voltage detecting circuit, voltage is input to PD controller, is provided with inner MOSFET and manages in PD controller, DC-DC controller, power switch FET pipe is connected successively with transformer, and form dc-dc, PD controller is connected with dc-dc, transformer is connected with rectification circuit, by the outside output voltage of rectification circuit, rectification circuit passes through voltage detecting circuit feedback link to DC-DC controller, it is characterized in that: also comprise outside MOSFET and manage and level shifting circuit, outside MOSFET pipe is in parallel with the inside MOSFET pipe in PD controller, outside MOSFET pipe is connected with level shifting circuit, PD controller is also connected to level shifting circuit simultaneously, the connection of earth terminal GND and disconnection in earth terminal GND and level shifting circuit in outside MOSFET pipe parallel with one another and inner MOSFET pipe control inputs, level shifting circuit provides operating voltage for outside MOSFET.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210526534.9A CN103051190B (en) | 2012-12-10 | 2012-12-10 | Be applied to the Power over Ethernet circuit of network monitoring device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210526534.9A CN103051190B (en) | 2012-12-10 | 2012-12-10 | Be applied to the Power over Ethernet circuit of network monitoring device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103051190A CN103051190A (en) | 2013-04-17 |
| CN103051190B true CN103051190B (en) | 2016-04-20 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201210526534.9A Expired - Fee Related CN103051190B (en) | 2012-12-10 | 2012-12-10 | Be applied to the Power over Ethernet circuit of network monitoring device |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107271876A (en) * | 2017-07-27 | 2017-10-20 | 深圳市和为顺网络技术有限公司 | PD detects circuit |
| US11209883B2 (en) * | 2018-11-01 | 2021-12-28 | Elo Touch Solutions, Inc. | Snap on power over the ethernet (POE) monitor system |
| CN109450653B (en) * | 2018-11-30 | 2021-07-16 | 锐捷网络股份有限公司 | Ethernet power supply protection method and device |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101594236A (en) * | 2009-06-29 | 2009-12-02 | 华为技术有限公司 | The implementation method of a kind of Power over Ethernet POE, Apparatus and system |
| CN201774455U (en) * | 2010-08-27 | 2011-03-23 | 深圳市润汇诚科技有限公司 | POE receiving power conversion board in high-power AP integration |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8199906B2 (en) * | 2006-10-17 | 2012-06-12 | Broadcom Corporation | Implementation of a communication link in powered device for layer 2 support |
| US7696640B2 (en) * | 2008-02-05 | 2010-04-13 | Broadcom Corporation | Power over Ethernet power sourcing equipment architecture for variable maximum power delivery |
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2012
- 2012-12-10 CN CN201210526534.9A patent/CN103051190B/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101594236A (en) * | 2009-06-29 | 2009-12-02 | 华为技术有限公司 | The implementation method of a kind of Power over Ethernet POE, Apparatus and system |
| CN201774455U (en) * | 2010-08-27 | 2011-03-23 | 深圳市润汇诚科技有限公司 | POE receiving power conversion board in high-power AP integration |
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|---|---|
| CN103051190A (en) | 2013-04-17 |
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Granted publication date: 20160420 Termination date: 20161210 |
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| CF01 | Termination of patent right due to non-payment of annual fee |