CN204810286U - Discernment supply circuit and ethernet power supply unit, system - Google Patents
Discernment supply circuit and ethernet power supply unit, system Download PDFInfo
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- CN204810286U CN204810286U CN201520523521.5U CN201520523521U CN204810286U CN 204810286 U CN204810286 U CN 204810286U CN 201520523521 U CN201520523521 U CN 201520523521U CN 204810286 U CN204810286 U CN 204810286U
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Abstract
The utility model discloses a discernment supply circuit and ethernet power supply unit, system does through the replacement of the PSE function chip with current the utility model discloses a discernment supply circuit utilizes opening of detection voltage to detect the magnitude of voltage of first node, and then, opening or close the 2nd a controllable switch component and a controllable switch component according to the size of the magnitude of voltage of this first node, furtherly can be exerting the power supply line to last with power supply voltage under the PD load or the non -loaded circumstances at the receiving end to for the receiving end power supply. The use of current PSE function chip has been avoided to this scheme, has simplified discernment supply circuit, has reduced the degree of difficulty that realizes the discernment power supply, has improved user experience.
Description
Technical field
The utility model relates to communication technical field, particularly relates to a kind of identification power supply circuits and power over Ethernet device, system.
Background technology
Power over Ethernet (PowerOverEthernet, POE), refer to when existing Ethernet wiring architecture is not changed, while some terminals based on Ethernet (as IP telephone machine, wireless local network connecting point, web camera etc.) transmission of data signals, the technology of direct current supply can also be provided by kind equipment for this reason.A complete POE system comprises power supply unit (PowerSourcingEquipment, PSE) and power receiving equipment (PowerDevice, PD) two parts.Wherein, PSE is used for powering for ethernet client equipment, is responsible for DC power supply to inject ethernet line, also manages whole POE Power over Ethernet process simultaneously.PD is the PSE load accepting power supply, i.e. the client device of POE system, as other ethernet devices many such as IP phone, web camera, wireless local network connecting point and palmtop PCs.
In 100-M network Ethernet POE system, PSE generally must use special controller, such as PSE functional chip, and the indoor design of this kind of special PSE functional chip is comparatively complicated, and therefore, its price is very expensive.And, during in order to be not enough to supply all of the port in the general supply of PSE device, be convenient to the different loads power of PSE device according to different port, carry out the dynamic management of load, ensure that the port of high priority can preferentially be powered, the port of low priority is not powered when load exceedes the general supply maximum power dissipation of PSE device, need according to POE (802.3af) standard netting twine 1236 or 4578 lines on detect, classification, power supply.Particularly, PSE device exports very little voltage at corresponding line to port, detect the powered device PD whether netting twine receiving end is connected with standard, if so, PSE device can be sorted out for PD, and assesses the power loss needed for PD, within the starting period of a configurable time (being generally less than 15 μ s), PSE starts to power from low-voltage to PD, and if not, then PSE can not open function of supplying power.
As shown in Figure 1, for the network interface design diagram of the PSE device that uses PSE functional chip to realize in traditional POE electric power system, here, 4578 lines pair in the RJ45 connector that PSE functional chip uses, its principle is that PSE functional chip detects by sending at a point, the signal of classification, for identifying 100,000,000 PD loads, after recognizing 100,000,000 legal PD loads, then open switch Q2, realize 53V voltage to pass through 4578 lines in used RJ45 connector to being supplied to 100,000,000 PD loads, thus realize power supply.
In summary, in existing POE electric power system, needing by detecting load-side, classification, just can power.But existing detection, classification etc. need special PSE functional chip, the complexity of its structure brings the larger difficulty that realizes to POE electric power system, and cost is higher.And, simply the PSE functional chip in PSE device can not be saved, otherwise PSE device accurately cannot recognize the loadtype that receiving end connects, when receiving end connects non-PD load, be easy to cause the general supply short circuit of PSE device and power supply cannot be realized.For this reason, need badly to find and a kind of realize comparatively convenient, lower-cost power supply unit.
Utility model content
The utility model embodiment provides a kind of and identifies power supply circuits and power over Ethernet device, system, in order to solve the structure due to PSE functional chip in existing POE electric power system existed in prior art extremely complicated bring realize the problem that difficulty is large and cost is higher.
The utility model embodiment is by the following technical solutions:
A kind of identify power supply circuits, comprising: isolated component, the first build-out resistor, the second build-out resistor and the first controllable switch element and the second controllable switch element;
Wherein, the output of described isolated component connects the right any pin of any one group of line of two groups of mutual line centerings of determining by first node, and input connects one end of described first build-out resistor;
The other end of described first build-out resistor connects detection voltage;
One end of described second build-out resistor connects another pin of the line centering of the two groups of mutual line centering isolated components connections determined, the other end ground connection of described second build-out resistor by Section Point;
Another group line of the mutual line centering of described two groups of determining to short circuit, and passes through the 3rd node ground connection;
The input of described first controllable switch element connects supply power voltage, and output connects first node, and control end connects the input of described second controllable switch element;
The output head grounding of described second controllable switch element, control end connects Section Point.
Preferably, described isolated component is diode.
Preferably, described first controllable switch element is P type metal-oxide-semiconductor, and described second controllable switch element is N-type metal-oxide-semiconductor.
Preferably, when the resistance of powered device PD load is 25K Ω, described detection voltage is 3.3V, and described supply power voltage is 53V, and described first build-out resistor is 2K Ω, and described second build-out resistor is 100K Ω.
A kind of power over Ethernet device, comprises described identification power supply circuits, connector and network interface;
Wherein, described identification power supply circuits, for detecting the PD load identifying receiving end, and power;
Described network interface, for receiving ethernet signal, and sends ethernet signal when the PD load of receiving end is powered;
Described connector, for the mutual line by self to the connection power supply unit of feeder ear and the PD load of receiving end.
Preferably, described connector is RJ45 connector.
Preferably, described RJ45 connector is connected with the identification power supply circuits of feeder ear with 78 lines pair by 45 lines of self.
A kind of Power over Ethernet system, comprises described power over Ethernet device, and by PD load that connector connects.
In the utility model, give up PSE functional chip, and testing circuit is improved, increase isolated component, first build-out resistor, second build-out resistor and the first controllable switch element, second controllable switch element, wherein, the output of isolated component connects the right any pin of any one group of line of two groups of mutual line centerings of determining by first node, input connects one end of the first build-out resistor, the other end of the first build-out resistor connects detection voltage, one end of second build-out resistor connects another pin of the line centering of the two groups of mutual line centering isolated components connections determined by Section Point, the other end ground connection of the second build-out resistor, two groups that determine another group lines of mutual line centering are to short circuit, and by the 3rd node ground connection, the input of the first controllable switch element connects supply power voltage, output connects first node, control end connects the input of the second controllable switch element, the output head grounding of the second controllable switch element, control end connects Section Point.By such Curve guide impeller; make these protection power supply circuits can be detected the magnitude of voltage of first node by the unlatching detecting voltage; and then; the second controllable switch element and the first controllable switch element is opened or closed according to the size of the magnitude of voltage of this first node; like this; just under receiving end is PD load or non-loaded situation, supply power voltage can be applied to supply lines to upper, thus power for receiving end.This solution avoids the use of existing PSE functional chip, simplify identification power supply circuits, reduce the difficulty realizing identifying power supply, improve Consumer's Experience.
Accompanying drawing explanation
In order to be illustrated more clearly in the technical scheme in the utility model embodiment, below the accompanying drawing used required in describing embodiment is briefly introduced, apparently, accompanying drawing in the following describes is only embodiments more of the present utility model, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
Fig. 1 is the network interface design diagram of the PSE device using PSE functional chip to realize in traditional POE electric power system;
A kind of schematic diagram identifying power supply circuits that Fig. 2 provides for the utility model;
A kind of comparatively concrete identification power supply circuits schematic diagram that Fig. 3 provides for the utility model;
The structural representation of a kind of power over Ethernet device that Fig. 4 provides for the utility model;
The power over Ethernet device schematic diagram connecting power supply with RJ45 connector that Fig. 5 provides for the utility model;
The structural representation of a kind of Power over Ethernet system that Fig. 6 provides for the utility model;
Fig. 7 (a)-Fig. 7 (e) be respectively the identification power supply circuits that the utility model provides 5 kinds of application scenarioss being suitable for.
Embodiment
In order to make the purpose of this utility model, technical scheme and advantage clearly, below in conjunction with accompanying drawing, the utility model is described in further detail, obviously, described embodiment is only the utility model part embodiment, instead of whole embodiments.Based on the embodiment in the utility model, those of ordinary skill in the art are not making other embodiments all obtained under creative work prerequisite, all belong to the scope of the utility model protection.
In the utility model, utilize the electric circuit characteristic of 100-M network Ethernet self, add identification power supply circuits, at the line used, port is independently identified whether this line is PD load to receiving end that port connects, only have for legal PD load, or when not affecting power consumption and other lines to port working, just can power to this port, ensure under the prerequisite not using PSE functional chip, realize the function identical with the PSE device of original use PSE functional chip by the simplest mode.
Be described in detail the scheme involved by the utility model below by specific embodiment, the utility model includes, but are not limited to following examples.
As shown in Figure 2, be a kind of schematic diagram identifying power supply circuits that the utility model provides, this main circuit will comprise:
Isolated component D1, first build-out resistor R1, second build-out resistor R2 and the first controllable switch element Q1 and the second controllable switch element Q2, wherein, the output of isolated component D1 connects any one group of line of two groups of mutual line centerings of determining to any pin Tx1 of Tx by first node a, input connects one end of the first build-out resistor R1, the other end of the first build-out resistor R1 connects detection voltage Vt, one end of second build-out resistor R2 connects another pin Tx2 of the line centering of the two groups of mutual line centering isolated components connections determined by Section Point b, the other end ground connection of the second build-out resistor R2, two groups that determine another group lines of mutual line centering are to Ty1 and Ty2 short circuit, and by the 3rd node c ground connection, the input x1 of the first controllable switch element Q1 connects supply power voltage Vg, output x2 connects first node a, control end x3 connects the input y1 of the second controllable switch element Q2, the output y2 ground connection of the second controllable switch element Q2, control end y3 connects Section Point b.
In the utility model, preferably, this isolated component D1 can be diode.In addition, this isolated component D1 can also for having other switching tube of buffer action, with isolation detection voltage and supply power voltage when powering.
Preferably, the first controllable switch element Q1 involved by the utility model can be P type metal-oxide-semiconductor, and the second controllable switch element Q2 can be N-type metal-oxide-semiconductor.
As shown in Figure 3, for a kind of comparatively concrete identification power supply circuits schematic diagram that the utility model provides, these identification power supply circuits are applied in POE electric power system, for the electric power system of the type, its receiving end connects 100,000,000 PD loads, and the resistance of this PD load is generally 25K Ω, now, be called PD load, other situations are all called as non-PD load or non-loaded.Below in conjunction with Fig. 4, the operation principle of this circuit is described.
In the circuit, detecting voltage Vt is 3.3V, and supply power voltage Vg is 53V, and the first build-out resistor R1 is 2K Ω, and the second build-out resistor R2 is 100K Ω.Isolated component D1 is diode, and the first controllable switch element Q1 is P type metal-oxide-semiconductor, and the second controllable switch element Q2 is N-type metal-oxide-semiconductor, wherein, by first group of line, Tx1, Tx2 and second group of line is set up to the connection of feeder ear and receiving end to Ty1 and Ty2.When detecting voltage Vt and opening, diode current flow, the state of the network equipment of receiving end now can be judged by the voltage swing detecting first node a, if now the voltage of first node a is greater than the conducting representative value of N-type metal-oxide-semiconductor, then determine that receiving end connects for PD load or two groups of lines between in open-circuit condition, simultaneously, owing to detecting that the voltage of Section Point b is identical with the voltage of first node a, then now N-type metal-oxide-semiconductor conducting, P type metal-oxide-semiconductor also can conducting, thus supply power voltage 53V can be applied to first node a by P type metal-oxide-semiconductor, and now diode turns off, play the effect that insulation blocking detects voltage.And then the line that supply power voltage 53V can be connected by first node a to the PD load supplying recognized, or is powered under open-circuit condition, and now PSE device does not consume any function.If detect, the voltage of first node a is less than the conducting representative value of N-type metal-oxide-semiconductor, what then determine that receiving end connects is non-PD load, N-type metal-oxide-semiconductor can not conducting, and then P type metal-oxide-semiconductor also can not conducting, and supply power voltage 53V would not by the line of feeder ear to the non-PD load supplying for receiving end.
Meanwhile, the utility model additionally provides a kind of power over Ethernet device, and as shown in Figure 4, this power over Ethernet device comprises above-mentioned arbitrary identification power supply circuits E, connector M and the network interface chip F that relate to; Wherein, identifying power supply circuits E, for detecting the PD load identifying receiving end, and powering; Network interface chip F, for receiving ethernet signal, and sends ethernet signal when the PD load of receiving end is powered; Connector M, for the mutual line by self to the connection power supply unit of feeder ear and the PD load of receiving end.
In this utility model, involved connector is generally RJ45 connector, and this RJ45 connector is a kind of Connection Element conventional in Power over Ethernet system.
As shown in Figure 5, when the PSE of feeder ear is connected by RJ45 connector and receiving end, 45 lines of RJ45 can be utilized to be connected with the identification power supply circuits of feeder ear with 78 lines pair.Particularly, one end that in these identification power supply circuits, the output of isolated component D1 connects pin 4, the second build-out resistor R2 of 45 line centerings by first node a connects the pin 5 of 45 line centerings by Section Point b, and line is to 78 short circuits and by the 3rd node c ground connection.
In addition, the utility model additionally provides a kind of Power over Ethernet system, and as shown in Figure 6, this Power over Ethernet system comprises above-mentioned any one power over Ethernet device PES equipment related to, and by PD equipment that connector connects.
In order to better understand foregoing circuit principle, below by 5 application scenarioss, this circuit is described in detail.It should be noted that, following examples are connected with receiving end by concrete RJ45 connector by these identification power supply circuits, and hypothesis receiving end is when connecting PD load, and its equivalent resistance is 25K Ω.So, these identification power supply circuits then can arrange the parameters such as concrete detection voltage, the first build-out resistor, the second build-out resistor according to this PD load equivalent resistance.
In the principle of work and power, non-PD load has three types, PD load shows as 25k resistance, the large state class of non-loaded connection three at below 10V, when to when applying 3.3V voltage between 45 and 78, only have altogether 5 kinds of possible equivalent electric circuit application scenarioss: short circuit, 150 Ω resistance, open circuit, 25K Ω resistance, non-loaded.
Application scenarios 1: the non-PD load of short circuit
As shown in Fig. 7 (a), for the schematic diagram of the non-PD load of receiving end in the utility model short circuit, because now 45 lines pair and 78 lines are to short circuit, and the direct ground connection of c point, so a point is low level, according to the principle of N-type metal-oxide-semiconductor, what now a point connected is exactly the control end of Q2, and the output head grounding of Q2 is low level, namely the voltage of control end is less than the voltage of output, then Q2 turns off, thus Q1 turns off, so 53V cannot be applied to a point, namely 45 lines on can not provide 53V voltage to receiving end.Visible, whether the network equipment that these identification power supply circuits accurately can recognize receiving end is PD load, if not PD load, does not then power, if PD load, then powers.
The non-PD load of application scenarios 2:150 Ω resistance
As shown in Fig. 7 (b), for the schematic diagram that the non-PD load of receiving end in the utility model is 150 Ω resistance, due to 45 lines to and 78 lines between cross-over connection 150 Ω (being in series by two 75 Ω resistance R3, R4 in figure) resistance, for a, c 2, be equivalent to the second build-out resistor R2 and 150 Ω resistor coupled in parallel, namely 100k and 150 is in parallel, and between equivalent a point and c point, cross-over connection resistance is (R2* (R3+R4))/(R2+R3+R4)=149 Ω.And, be now that diode D1 forward applies 3.3V detection voltage, therefore this diode D1 is in conducting state, simultaneously, this diode D1 constant drain 0.3V voltage, and then by 2k Ω and a of R1, between c, equivalent cross-over connection resistance 149 ohm carries out dividing potential drop, so a point voltage is (3.3-0.3) * 149/ (149+2K)=0.2V, namely the control end voltage of Q2 is 0.2V, now the difference of control end voltage and output end voltage is 0.2-0=0.2V, be less than 0.7V required for the conducting of N-type metal-oxide-semiconductor (in the circuit of reality, 0.7V is NMOS representative value, do not limit and can only be greater than 0.7V, the design selection of Q2 only need select cut-in voltage to be greater than the device of 0.2V), so Q2 turns off, Q1 also turns off, 45 lines are to providing 53V voltage for receiving end.
Application scenarios 3: non-PD load of opening a way
As shown in Fig. 7 (c), for the schematic diagram that the non-PD load of receiving end in the utility model is open circuit, due to 45 lines to 78 line open-circuits, only R2 is there is between a and c, namely a, c cross-over connection 100k Ω resistance, so a point voltage is that 3.3V is after D1 pressure drop, again by R1 and R2 dividing potential drop, namely a point voltage is (3.3-0.3) * 100K/ (100K+2K)=2.9V, the difference of control end voltage and output end voltage is 2.9-0=2.9V, be greater than 0.7V, Q2 conducting, and then the control end ground connection of Q1, simultaneously, because the input of Q1 connects 53V, namely the input terminal voltage of Q1 and the difference of control end voltage are 53-0=53V, be greater than 0.7V, then Q1 conducting, 53V is applied to a point, and output to 45 lines pair, receiving end is powered.This is the identification powered operation of carrying out as feeder ear, but, due to present 45 lines to 78 lines to belonging to open-circuit condition, even if for receiving end provides 53V voltage, PSE device itself does not consume any power consumption yet, does not have any impact yet, so power supply state is now normal.Simultaneously, because a point voltage becomes 53V, Q2 now keeps conducting, Q1 also keeps conducting, ensure that 53V continues to be provided in a point, and due to the existence of diode D1, its input terminal voltage 3.3V is lower than output end voltage 53V, its effect shows as open circuit, such 53V would not pour in down a chimney to detection voltage 3.3V, thus also can not have any impact to the power supply of 3.3V own, serve the effect of isolation, avoid 45 lines to power for receiving end 53V time high voltage pour in down a chimney 3.3V low-voltage and damage the power-supply system that 3.3V is provided, the existence of diode D1 then can play buffer action, guarantee system is normally run.
Application scenarios 4:25K Ω resistance PD load
As shown in Fig. 7 (d), for receiving end PD load in the utility model is the schematic diagram of 25K Ω resistance, between a point and c point, cross-over connection resistance is that 100k and 25k is in parallel, impedance is (100K*25K))/(100K+25K)=20K Ω, so a point voltage is (3.3-0.3) * 20K/ (20K+2K)=2.7V, the difference of control end voltage and output end voltage is 2.7-0=2.7V, be greater than the 0.7V required for NMOS conducting, so Q2 conducting, Q1 is conducting also, 53V voltage is applied to a point, and outputs to 45 lines pair, is the PD load supplying of receiving end.
Application scenarios 5: non-loaded
As shown in Fig. 7 (e), for the non-loaded schematic diagram of receiving end in the utility model, now 4,5 lines are to disconnection, b point only has by a kind of state of R1 ground connection, disconnects so b point is 0V, Q1, Q2 also disconnects, 53V cannot be provided to 4,5 lines pair, and therefore, PSE device is not for receiving end is powered.
To sum up, in the utility model, by newly-designed identification power supply circuits, first node in this circuit is detected, thus tentatively can identify the type of the network equipment of receiving end, and determine whether as non-PD load, if, then not for the network equipment of receiving end is powered, otherwise, utilize the PD load supplying identifying that power supply circuits are receiving end.In fact, only receiving end connect PD load and supply lines to 45,78 between open circuit two kinds of situations under just for receiving end provides 53V voltage (to provide 53V to be all normal condition under both of these case, impact can not be had to system), and other situations are not for receiving end is powered.Use the PSE device (as Fig. 1) of PSE functional chip to compare with tradition, the utility model merely add the first controllable switch element Q1, the first build-out resistor R1, the second build-out resistor R2, isolated component D1 tetra-elements; And the detection voltage 3.3V mentioned is a kind of voltage example, object is to detect PD load (because of the principle according to PD load, as long as apply to it voltage being less than 10V, its effect is just equivalent to 25k resistance), the utility model example is to apply 3.3V voltage to it, but actual is to select the voltage being less than arbitrarily 10V, in order to not increase extra cost, during side circuit design, the voltage being less than 10V can directly selecting PSE device itself to have is connected to and detects voltage place.To sum up, the utility model, relative to PSE functional chip, has altogether only been used four components and parts, and has been all the general-purpose device of Ultra Low Cost, greatly reduced the cost of PSE device.
And, for multiport PSE device, each port copies according to this design, and each port is the independent situation identifying power supply and cannot power, and there will not be any one port connect the network equipment of receiving end thus cause the network equipment failure of self or receiving end.
By each above-mentioned embodiment, recognition function of the present utility model is also different from traditional electric power system and removes measuring resistance, but utilize all circuit typess that may occur in existing network interface standard design, and according to the impact of all circuit typess on system after applying 53V voltage, circuit types is divided into and can powers, with two classes of cannot powering, instead of PD and non-PD.Simultaneously, do not revise the standard design of other parts of existing PSE device, the circuit only connected at former PSE functional chip makes and changes or replace, do not affect other functions existing of PSE device, only original PSE functional chip is replaced with 4 simple elements, enormously simplify design scale, reduce cost.In addition, the design of the utility model the whole series completes with passive passive device, and do not rely on any work being similar to the function of supplying power chips such as PSE functional chip, go for any PSE device, reliability is high, has extremely strong compatibility.And the utility model is not made an amendment the circuit beyond the non-PSE chip of PSE device, and compatible result is good, has very strong portability.
Although described preferred embodiment of the present utility model, those skilled in the art once obtain the basic creative concept of cicada, then can make other change and amendment to these embodiments.So claims are intended to be interpreted as comprising preferred embodiment and falling into all changes and the amendment of the utility model scope.
Obviously, those skilled in the art can carry out various change and modification to the utility model and not depart from spirit and scope of the present utility model.Like this, if these amendments of the present utility model and modification belong within the scope of the utility model claim and equivalent technologies thereof, then the utility model is also intended to comprise these change and modification.
Claims (8)
1. identify power supply circuits, it is characterized in that, comprising:
Isolated component, the first build-out resistor, the second build-out resistor and the first controllable switch element and the second controllable switch element;
Wherein, the output of described isolated component connects the right any pin of any one group of line of two groups of mutual line centerings of determining by first node, and input connects one end of described first build-out resistor;
The other end of described first build-out resistor connects detection voltage;
One end of described second build-out resistor connects another pin of the line centering of the two groups of mutual line centering isolated components connections determined, the other end ground connection of described second build-out resistor by Section Point;
Another group line of the mutual line centering of described two groups of determining to short circuit, and passes through the 3rd node ground connection;
The input of described first controllable switch element connects supply power voltage, and output connects first node, and control end connects the input of described second controllable switch element;
The output head grounding of described second controllable switch element, control end connects Section Point.
2. circuit as claimed in claim 1, it is characterized in that, described isolated component is diode.
3. circuit as claimed in claim 1, it is characterized in that, described first controllable switch element is P type metal-oxide-semiconductor, and described second controllable switch element is N-type metal-oxide-semiconductor.
4. circuit as claimed in claim 1, it is characterized in that, when the resistance of powered device PD load is 25K Ω, described detection voltage is 3.3V, and described supply power voltage is 53V, and described first build-out resistor is 2K Ω, and described second build-out resistor is 100K Ω.
5. a power over Ethernet device, is characterized in that, comprises the arbitrary described identification power supply circuits of claim 1-4, connector and network interface;
Wherein, described identification power supply circuits, for detecting the PD load identifying receiving end, and power;
Described network interface, for receiving ethernet signal, and sends ethernet signal when the PD load of receiving end is powered;
Described connector, for the mutual line by self to the connection power supply unit of feeder ear and the PD load of receiving end.
6. equipment as claimed in claim 5, it is characterized in that, described connector is RJ45 connector.
7. equipment as claimed in claim 6, is characterized in that, described RJ45 connector is connected with the identification power supply circuits of feeder ear with 78 lines pair by 45 lines of self.
8. a Power over Ethernet system, is characterized in that, comprises the arbitrary described power over Ethernet device of claim 5-7, and by PD load that connector connects.
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| CN201520523521.5U CN204810286U (en) | 2015-07-17 | 2015-07-17 | Discernment supply circuit and ethernet power supply unit, system |
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| CN201520523521.5U CN204810286U (en) | 2015-07-17 | 2015-07-17 | Discernment supply circuit and ethernet power supply unit, system |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106027268A (en) * | 2016-06-29 | 2016-10-12 | 杭州士兰微电子股份有限公司 | Power over Ehernet system, control circuit and control method |
| 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 |
| CN107547210A (en) * | 2017-08-25 | 2018-01-05 | 锐捷网络股份有限公司 | A kind of non-standard power supply unit, power receiving equipment and system |
| CN107846286A (en) * | 2017-10-19 | 2018-03-27 | 浙江大华技术股份有限公司 | It is a kind of for the electric supply installation of cascade, method of supplying power to and cascade electric power system |
| CN114264868A (en) * | 2021-11-30 | 2022-04-01 | 深圳飞音时代网络通讯技术有限公司 | Detection circuit and method for power receiving end equipment |
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2015
- 2015-07-17 CN CN201520523521.5U patent/CN204810286U/en not_active Expired - Fee Related
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106027268A (en) * | 2016-06-29 | 2016-10-12 | 杭州士兰微电子股份有限公司 | Power over Ehernet system, control circuit and control method |
| CN106027268B (en) * | 2016-06-29 | 2022-09-09 | 杭州士兰微电子股份有限公司 | Ethernet power supply system and control circuit |
| 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 |
| CN107547210A (en) * | 2017-08-25 | 2018-01-05 | 锐捷网络股份有限公司 | A kind of non-standard power supply unit, power receiving equipment and system |
| CN107846286A (en) * | 2017-10-19 | 2018-03-27 | 浙江大华技术股份有限公司 | It is a kind of for the electric supply installation of cascade, method of supplying power to and cascade electric power system |
| CN114264868A (en) * | 2021-11-30 | 2022-04-01 | 深圳飞音时代网络通讯技术有限公司 | Detection circuit and method for power receiving end equipment |
| CN114264868B (en) * | 2021-11-30 | 2023-10-20 | 深圳飞音时代网络通讯技术有限公司 | Detection circuit and method of power receiving end equipment |
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