CN205584216U - System is listened in POE power supply - Google Patents
System is listened in POE power supply Download PDFInfo
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- CN205584216U CN205584216U CN201620322460.0U CN201620322460U CN205584216U CN 205584216 U CN205584216 U CN 205584216U CN 201620322460 U CN201620322460 U CN 201620322460U CN 205584216 U CN205584216 U CN 205584216U
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Abstract
The utility model discloses a system is listened in POE power supply, including POE power supply unit and the POE oading equipment who has rectifier circuit, POE oading equipment includes ON -OFF control circuit, this ON -OFF control circuit with rectifier circuit's output is connected, ON -OFF control circuit listens resistance R1 and connection including rectifying circuit's even two outputs the ON -OFF control circuit of rectifier circuit's two outputs, wherein, the resistance that should listen resistance R1 detects when the POE power supply unit for 24.9K ohm listen resistance R1 and POE oading equipment's PD impedance phase waiting, the ON -OFF control circuit disconnection is in order to guarantee that this POE power supply unit lasts the power supply. This technology POE power supply unit lasts the power supply to POE oading equipment, break away from the predicament that relies on external PD in the past and listen the chip, realized low -cost efficient listening, guarantee the operation high efficiency of product.
Description
Technical field
This utility model relates to POE power supply technique field, especially a kind of POE power switch control circuit.
Background technology
POE electric power system develops rapidly along with a large amount of the most universal of network at present, POE (Power over Ethernet), Chinese commonly referred to as power over Ethernet, refer in the case of existing Ethernet Cat.5 wiring architecture does not do any change, transmit while data signal for being based partially on the terminal unit of IP, the technology of electrical power can also be provided, including PSE (Power Sourcing for this kind equipment
Equipment, power supply unit), two parts of PD (Powered Device, power receiving equipment).For network communication equipment, POE powers and means to reduce by a supply line, and it has features such as using simple, low cost, reliability height, safety and control simply, connects up for engineering construction and has great benefit.
PSE device is the equipment powered for ethernet client equipment, also it is the manager of whole PoE POE process simultaneously, and PD equipment is the PSE load accepting power supply, the i.e. client device of PoE system, other ethernet devices as many in IP phone, network security video camera, AP and palm PC (PDA) or charger for mobile phone etc..Both set up the informational linkage of the aspects such as the connection about receiving end equipment PD, device type, power consumption level based on IEEE 802.3af standard, and the PSE that takes this as a foundation is powered to PD by Ethernet.Five class netting twines of standard have four pairs of twisted-pair feeders, and IEEE80 2.3af allows two kinds of line sequence method of supplying power to: one is to uploading transmission of electricity stream at 4,5,7,8 lines, and specifies, 4,5 is positive pole, and 7,8 is negative pole.Another kind of power supply is to upload power transmission source at 1,2,3,6 lines, and polarity be that arbitrarily 1,2 be positive pole, 3,6 be negative pole or 1,2 be negative pole, 3,6 is positive pole, and one therein is powered polarity.
Existing POE power supply unit all uses PD detecting chip to carry out detecting process, especially domestic market substantially dependence on import PD detecting chip and completes, and its cost is high, and has undesirable effect domestic technique.
Summary of the invention
In order to overcome the deficiencies in the prior art, the utility model proposes a kind of POE and power detecting system, its objective is to simplify the complexity of PD detecting, reduce product cost, improve the operational efficiency of product.
In order to solve above-mentioned technical problem, the basic technical scheme that the utility model proposes is: a kind of POE powers detecting system, including with the POE power supply unit of rectification circuit and POE load equipment, it is characterised in that:
Described POE load equipment includes ON-OFF control circuit, and this ON-OFF control circuit is connected with the outfan of described rectification circuit；
Described ON-OFF control circuit includes connecting the detecting resistance R1 of two outfans of rectification circuit and connecting the ON-OFF control circuit of two outfans of described rectification circuit；
Wherein, the resistance of this detecting resistance R1 is 24.9K ohm, and when the PD impedance that POE power supply unit detects described detecting resistance R1 and POE load equipment is equal, ON-OFF control circuit disconnects to ensure this POE power supply unit continued power.
Further, ON-OFF control circuit also includes the first Zener diode D, and the positive pole of this first Zener diode D connects the cathode output end of rectification circuit, and the negative electricity of the first Zener diode D connects the cathode output end of described rectification circuit.
Further, described ON-OFF control circuit includes the second resistance R2, second Zener diode D2, 3rd resistance R3 and metal-oxide-semiconductor, first end of described second resistance R2 connects the cathode output end of rectification circuit, its second end connects the positive terminal of the second Zener diode D2, the negative pole end of this second Zener diode D2 connects first end of the 3rd resistance R3, second end of the 3rd resistance R3 connects the cathode output end of described rectification circuit, wherein, metal-oxide-semiconductor grid connects the negative pole end of the second Zener diode D2, its source electrode connects second end of the 3rd resistance R3, its grounded drain.
Further, ON-OFF control circuit also includes that one end of the first electric capacity C1 and the second electric capacity C2, this first electric capacity C1 connects the cathode output end of rectification circuit, and the other end connects the cathode output end of rectification circuit；One end of second electric capacity C2 connects second end of the second resistance R2, and the other end connects the cathode output end of rectification circuit.
The beneficial effects of the utility model are:
This utility model utilizes PD impedance for the characteristic of 24.9K ohm, at the detecting resistance that the rear end of rectification circuit one resistance of connection is 24.9K ohm, realize to be powered to POE load equipment when this resistance detected by POE power supply unit by this detecting resistance, and now, the on-off circuit of this utility model design will disconnect, it is achieved POE power supply unit is to POE load equipment continued power.This technology breaks away from the predicament in the past relying on external PD detecting chip, it is achieved that the detecting of low-cost high-efficiency, it is ensured that the operation high efficiency of product.
Accompanying drawing explanation
Fig. 1 is that a kind of POE of this utility model powers the structured flowchart of detecting system；
Fig. 2 is that the POE described in Fig. 1 powers the circuit diagram of detecting system.
Detailed description of the invention
Below with reference to accompanying drawing 1 and accompanying drawing 2, this utility model is described further, but protection domain of the present utility model should not limited with this.
Comparison Fig. 1:
This utility model one POE is powered detecting system, including POE the power supply unit 10 and POE load equipment 20 with rectification circuit 101,
Described POE load equipment 20 includes ON-OFF control circuit 201, and this ON-OFF control circuit 201 is connected with the outfan of described rectification circuit 101；
Described ON-OFF control circuit 201 includes connecting the detecting resistance R1 of two outfans of rectification circuit 101 and connecting the ON-OFF control circuit 201 of two outfans of described rectification circuit 101；
Wherein, the resistance of this detecting resistance R1 is 24.9K ohm, and when the PD impedance that POE power supply unit 10 detects described detecting resistance R1 and POE load equipment 20 is equal, now ON-OFF control circuit 2011 disconnects ensureing this POE power supply unit 10 continued power.
The technical program, mainly by the characteristic that PD impedance is 24.9K ohm, devises detecting resistance R1, and the resistance of this detecting resistance R1 is identical with the resistance of PD impedance, is all 24.9K ohm.In the course of the work, described POE power supply unit 10 exports a voltage the least, then detecting that the resistance of POE load equipment 20 is identical with detecting resistance R1, then ON-OFF control circuit 2011 will disconnect, and POE power supply unit 10 can continue to provide electric power to POE load equipment 20.
With reference to Fig. 2, ON-OFF control circuit 2011 also includes the first Zener diode D, and the positive pole of this first Zener diode D connects the cathode output end of rectification circuit, and the negative electricity of the first Zener diode D connects the cathode output end of described rectification circuit 101.Can effectively protect posterior member from the damage of high-voltage pulse by the first Zener diode D.
Detailed, ON-OFF control circuit includes the second resistance R2, the second Zener diode D2, the 3rd resistance R3 and metal-oxide-semiconductor, first end of described second resistance R2 connects the cathode output end of rectification circuit, its second end connects the positive terminal of the second Zener diode D2, the negative pole end of this second Zener diode D2 connects first end of the 3rd resistance R3, second end of the 3rd resistance R3 connects the cathode output end of described rectification circuit, wherein, metal-oxide-semiconductor grid connects the negative pole end of the second Zener diode D2, its source electrode connects second end of the 3rd resistance R3, its grounded drain.In this circuit, achieving the open and close controlling to metal-oxide-semiconductor by this second resistance R2, the second Zener diode D2, the 3rd resistance R3, when the resistance of the POE load equipment 20 detected is identical with detecting resistance R1, metal-oxide-semiconductor disconnects and realizes continued power.By adjusting the parameter of this second Zener diode D2, it is possible to the standard of compatible IEEE 802.3af and IEEE802.3at.It is in detail, when the second Zener diode D2 uses 15V Zener diode, it is provided that can reach 15.4W to the power of load, i.e. IEEE802.3af standard；When using 12V Zener diode, it is provided that can reach 25.5W to the power of load, i.e. IEEE802.3at standard.
In order to raising compatibility issue, compatibility issue especially for PSE chip, ON-OFF control circuit 2011 also includes that one end of the first electric capacity C1 and the second electric capacity C2, this first electric capacity C1 connects the cathode output end of rectification circuit, and the other end connects the cathode output end of rectification circuit 101；One end of second electric capacity C2 connects second end of the second resistance R2, and the other end connects the cathode output end of rectification circuit 101.
The scheme of this technology is simple, and the product cost of formation is low, and efficiency is high.
The announcement of book and teaching according to the above description, above-mentioned embodiment can also be changed and revise by this utility model those skilled in the art.Therefore, this utility model is not limited to detailed description of the invention disclosed and described above, should also be as falling in scope of the claims of the present utility model to modifications and changes more of the present utility model.Although additionally, employ some specific terms in this specification, but these terms are merely for convenience of description, this utility model is not constituted any restriction.
Claims (4)
1. POE powers a detecting system, including with the POE power supply unit of rectification circuit and POE load equipment, it is characterised in that: described POE load equipment includes ON-OFF control circuit, and this ON-OFF control circuit is connected with the outfan of described rectification circuit；Described ON-OFF control circuit includes connecting the detecting resistance R1 of two outfans of rectification circuit and connecting the ON-OFF control circuit of two outfans of described rectification circuit；Wherein, the resistance of this detecting resistance R1 is 24.9K ohm, and when the PD impedance that POE power supply unit detects described detecting resistance R1 and POE load equipment is equal, ON-OFF control circuit disconnects to ensure this POE power supply unit continued power.
2. POE as claimed in claim 1 a kind of powers detecting system, it is characterized in that: ON-OFF control circuit also includes the first Zener diode D, the positive pole of this first Zener diode D connects the cathode output end of rectification circuit, and the negative electricity of the first Zener diode D connects the cathode output end of described rectification circuit.
3. POE as claimed in claim 1 or 2 a kind of powers detecting system, it is characterized in that: described ON-OFF control circuit includes the second resistance R2, second Zener diode D2, 3rd resistance R3 and metal-oxide-semiconductor, first end of described second resistance R2 connects the cathode output end of rectification circuit, its second end connects the positive terminal of the second Zener diode D2, the negative pole end of this second Zener diode D2 connects first end of the 3rd resistance R3, second end of the 3rd resistance R3 connects the cathode output end of described rectification circuit, wherein, metal-oxide-semiconductor grid connects the negative pole end of the second Zener diode D2, its source electrode connects second end of the 3rd resistance R3, its grounded drain.
4. POE as claimed in claim 3 a kind of powers detecting system, it is characterised in that:
ON-OFF control circuit also includes that one end of the first electric capacity C1 and the second electric capacity C2, this first electric capacity C1 connects the cathode output end of rectification circuit, and the other end connects the cathode output end of rectification circuit；One end of second electric capacity C2 connects second end of the second resistance R2, and the other end connects the cathode output end of rectification circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620322460.0U CN205584216U (en) | 2016-04-18 | 2016-04-18 | System is listened in POE power supply |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620322460.0U CN205584216U (en) | 2016-04-18 | 2016-04-18 | System is listened in POE power supply |
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| Publication Number | Publication Date |
|---|---|
| CN205584216U true CN205584216U (en) | 2016-09-14 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201620322460.0U Expired - Fee Related CN205584216U (en) | 2016-04-18 | 2016-04-18 | System is listened in POE power supply |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106888099A (en) * | 2017-03-20 | 2017-06-23 | 厦门亿联网络技术股份有限公司 | A kind of simple compatible POE electric supply installations |
| CN106972936A (en) * | 2017-04-28 | 2017-07-21 | 上海斐讯数据通信技术有限公司 | A kind of system and method for adjustable POE supply voltages |
| 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 |
| CN112688788A (en) * | 2020-12-16 | 2021-04-20 | 普联国际有限公司 | Discrete PD circuit and power supply system |
-
2016
- 2016-04-18 CN CN201620322460.0U patent/CN205584216U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106888099A (en) * | 2017-03-20 | 2017-06-23 | 厦门亿联网络技术股份有限公司 | A kind of simple compatible POE electric supply installations |
| CN106972936A (en) * | 2017-04-28 | 2017-07-21 | 上海斐讯数据通信技术有限公司 | A kind of system and method for adjustable POE supply voltages |
| 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 |
| CN112688788A (en) * | 2020-12-16 | 2021-04-20 | 普联国际有限公司 | Discrete PD circuit and power supply system |
| CN112688788B (en) * | 2020-12-16 | 2022-11-08 | 普联国际有限公司 | Discrete PD circuit and power supply system |
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| C14 | Grant of patent or utility model | ||
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| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20160914 Termination date: 20190418 |