Low-cost POE separator

Abstract

The utility model discloses a low-cost POE separator, which comprises an input unit, a signature circuit unit, an under-voltage locking circuit unit and an output unit, the input unit is connected with the signature circuit unit, the signature circuit unit is connected with the under-voltage locking circuit unit in parallel, and the under-voltage locking circuit unit is connected with the output unit. A signature circuit unit and an under-voltage locking circuit unit are arranged in the circuit board, an electric signal of an input unit is detected, an electronic element meeting protocol requirements is arranged in the signature circuit unit, a detected voltage value of an under-voltage locking circuit is used, and when the detected voltage value reaches a preset voltage value, a corresponding power supply is output. Therefore, a special protocol chip is avoided, and the overall cost is reduced.

Description

Technical Field

[0001] This application relates to the technical field of POE splitters, and in particular to a low-cost POE splitter. Background Art

[0002] POE is the abbreviation of Power Over Etheernet, which means "power supply technology based on Ethernet cable" in Chinese. It refers to the technology that can transmit data signals for some IP-based terminal devices and provide DC power for such devices at the same time without any modification to the existing Ethernet wiring infrastructure. POE uses LAN to transmit data and electric power to devices simultaneously, eliminating the need for engineering to install power connections for each Ethernet network terminal, reducing the number of cables for communication and power supply, thus reducing the usage cost and also improving the flexibility of the terminal installation location, which is of great benefit to engineering construction wiring.

[0003] Currently, there are a wide variety of Ethernet terminals with inconsistent power supply requirements. For example, in existing network monitoring systems, there are various terminal devices mainly including network cameras. Currently, in addition to network cameras, there are also small devices such as infrared lamps, indicator lights, and pickups around these terminal devices. Among these devices, there are many non-POE-powered devices that require an independent power supply channel to supply power, and the POE power supply separation technology has emerged as the times require.

[0004] Currently, many POE splitters use special signature protocol chips, which have relatively high costs and cause certain troubles to end users. Summary of the Utility Model

[0005] The technical problem to be solved by this application is that many current POE splitters use special signature protocol chips, which have relatively high costs and cause certain troubles to end users.

[0006] To solve the above technical problem or at least partially solve the above technical problem, this application provides a low-cost POE splitter.

[0007] The utility model discloses a low-cost POE splitter, which includes an input unit, a signature circuit unit, an under-voltage lockout circuit unit, and an output unit. The input unit is connected to the signature circuit unit, the signature circuit unit is connected in parallel with the under-voltage lockout circuit unit, and the under-voltage lockout circuit unit is connected to the output unit.

[0008] Preferably, the input unit includes an input end and a rectification circuit unit, and the input end is connected to the rectification circuit unit.

[0009] Preferably, the signature circuit unit includes a first capacitor and a first resistor, and the first capacitor is in parallel with the first resistor.

[0010] Preferably, the resistance value of the first resistor is 24.9 kΩ.

[0011] Preferably, it includes a through-switch, and the through-switch is connected to the under-voltage lockout circuit unit.

[0012] Preferably, the through-switch is a MOS transistor.

[0013] Preferably, the under-voltage lockout circuit unit includes a first diode, a second diode, a second resistor, and a third resistor;

[0014] The first diode is in parallel with the second resistor, and the second diode is in series with the third resistor.

[0015] Preferably, the first diode and the second diode are zener diodes.

[0016] Preferably, the positive electrode of the first diode is connected to the source electrode of the through-switch, the negative electrode is connected to the gate electrode of the through-switch, and the positive electrode of the second diode is connected to the gate electrode of the through-switch.

[0017] Preferably, the output unit includes a control circuit unit and a switching circuit unit, and the control circuit unit is connected to the switching circuit unit.

[0018] The above technical solution provided by this application has the following advantages compared with the prior art:

[0019] A low-cost POE splitter provided by this application is internally provided with a signature circuit unit and an under-voltage lockout circuit unit. By detecting the electrical signal of the input unit, electronic components meeting the protocol requirements are arranged in the signature circuit unit, and then the detected voltage value of the under-voltage lockout circuit is used. When the predetermined voltage value is reached, the corresponding power supply is output, thereby avoiding setting a dedicated protocol chip and reducing the overall cost. Description of the Drawings

[0020] The drawings here are incorporated into the specification and form a part of this specification, showing the embodiments in line with the present invention and used together with the specification to explain the principles of the present invention.

[0021] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, for those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0022] Figure 1 The circuit of a low-cost POE splitter provided for this application Figure 1 ;

[0023] Figure 2 The circuit of a low-cost POE splitter provided for this application Figure 2 。

[0024] Explanation of reference numerals:

[0025] 1. Low-cost POE splitter; 11. Input unit; 111. Input terminal; 112. Rectification circuit unit; 12. Signature circuit unit; 13. Under-voltage lockout circuit unit; 14. Through-switch; 15. Output unit. Detailed implementation manners

[0026] To make the objectives, technical solutions and advantages of this application clearer, the technical solutions in this application will be clearly and completely described below with reference to the accompanying drawings in this application. Obviously, the described embodiments are some but not all of the embodiments of this application. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in this application without creative efforts shall fall within the scope of protection of this application.

[0027] Refer to Figure 1-2 , this utility model discloses a low-cost POE splitter 1, which includes an input unit 11, a signature circuit unit 12, an under-voltage lockout circuit unit 13, a through-switch 14, and an output unit 15. The input unit 11 is connected to the signature circuit unit 12, the signature circuit unit 12 is connected in parallel with the under-voltage lockout circuit unit 13, the under-voltage lockout circuit unit 13 is connected to the output unit 15, and the through-switch 14 is connected to the under-voltage lockout circuit unit 13.

[0028] Specifically, the input unit 11 inputs an electrical signal and rectifies and filters the signal. The signature circuit unit 12 is used to detect the current of the input electrical signal. The under-voltage lockout unit judges the voltage value of the input electrical signal. When the under-voltage lockout unit determines that it meets the requirements, the through-switch 14 conducts and opens, and the output unit 15 separates the power signal in the electrical signal and outputs it. The output unit 15 is connected to a power receiving device or a signal receiving device.

[0029] It can be understood that in the low-cost POE splitter 1, a signature circuit unit 12 and an under-voltage lockout circuit unit 13 are provided inside. By detecting the electrical signal of the input unit 11, electronic components that meet the protocol requirements are provided in the signature circuit unit 12, and then the voltage value is detected by the under-voltage lockout circuit. When the predetermined voltage value is reached, the corresponding power supply is output, thereby avoiding setting a dedicated protocol chip and reducing the overall cost.

[0030] As an embodiment, the through-switch 14 is a MOS transistor. In this embodiment, the through-switch 14 uses the model number 5N10_C5140036, but the model number of the through-switch 14 is not limited to the model in this embodiment.

[0031] The input unit 11 includes an input terminal 111 and a rectification circuit unit 112, and the input terminal 111 is connected to the rectification circuit unit 112. Specifically, the input terminal 111 is a network interface, generally an RJ45 interface. Two pairs of sub-input terminals 111 in the input terminal 111 are respectively connected to the rectification circuit unit 112 to input electrical signals to the rectification circuit unit 112, and the rectification circuit unit 112 rectifies the electrical signals to the corresponding required electrical signals for subsequent detection.

[0032] The signature circuit unit 12 includes a first capacitor C7 and a first resistor R12, and the first capacitor C7 is in parallel with the first resistor R12. Specifically, the signature circuit unit 12 is set with capacitors and resistors according to the requirements of the IEEE802.3af protocol. By setting the capacitors and resistors with corresponding values, it is convenient to meet the requirements of the current protocol and enable the separator to operate normally. It can be understood that for the device connected through the input unit 11 terminal, the capacitors and resistors of the signature circuit unit 12 are detected by inputting and detecting electrical signals. The current needs to be limited below 100 mA, and the power consumption is classified. When it is determined to meet the requirements, the corresponding electrical signals are input.

[0033] Among them, the resistance value of the first resistor R12 is 24.9 kΩ, the capacitance of the first capacitor C7 is 10 Nf, and the rated voltage is 100 V.

[0034] It can be understood that through the signature circuit unit 12 for signature handshake, it is judged whether the current powered device meets the protocol requirements. When the powered device meets the requirements, the power output device will supply power and output the corresponding electrical signals. That is to say, the signature circuit unit 12 needs to meet the requirements of the power output device connected to the input unit 11, and the power output device will output power to supply power to the powered unit.

[0035] The under-voltage lockout circuit unit 13 includes a first diode D10, a second diode D7, a second resistor R13, and a third resistor R11. Among them, the first diode D10 is in parallel with the second resistor R13, and the second diode D7 is in series with the third resistor R11. The positive electrode of the first diode D10 is connected to the source electrode of the through-switch 14, the negative electrode is connected to the gate electrode of the through-switch 14, the positive electrode of the second diode D7 is connected to the gate electrode of the through-switch 14, the negative electrode of the second diode D7 is connected to the second resistor R13, and the second diode D7 is respectively in series with the first diode D10 and the first resistor R12.

[0036] Specifically, the under-voltage lockout circuit unit 13 determines that the voltage of the current input electrical signal reaches above 42V, turns on the through-switch 14, and outputs an electrical signal with a fixed voltage value.

[0037] As an embodiment, the first diode D10 and the second diode D7 are zener diodes, and the third resistor R11 is a current-limiting resistor, which can prevent the second diode D7 from being damaged due to excessive current. The second diode D7 stably outputs an electrical signal with a voltage value of 27V, making the gate-source voltage value of the through-switch 14 greater than 3V, turning on the through-switch 14, and enabling the output unit 15 to operate normally.

[0038] Particularly, in this embodiment, the first diode D10 uses the BZT52C10 signal, the second diode D7 uses the BZT52C27 model, the resistance value of the second resistor R13 is 24.9KΩ, and the resistance value of the third resistor R11 is 51KΩ.

[0039] The output unit 15 includes a control circuit unit and a switch circuit unit, and the control circuit unit is connected to the switch circuit unit. Specifically, the control circuit unit controls the input signal, and the switch circuit unit controls whether the signal is input to the subsequent circuit unit. Specifically, the output unit 15 outputs the detected and processed electrical signal to the subsequent circuit for subsequent processing.

[0040] In the above embodiments, the descriptions of the respective embodiments have their own emphases. For the parts not described in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0041] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present invention.

[0042] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present invention, "a plurality" means two or more unless otherwise specifically defined.

[0043] In the present utility model, unless otherwise clearly defined and limited, terms such as "installation", "connection", "linkage", "fixation", etc. shall be understood in a broad sense. For example, it may be a connection, a detachable connection, or an integral one; it may be a mechanical connection or an electrical connection; it may be a direct connection or an indirect connection through an intermediate medium, and it may be the communication inside two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0044] In the present utility model, unless otherwise clearly defined and limited, the fact that the first feature is "above" or "below" the second feature may include the direct contact between the first and second features, or may include the situation where the first and second features are not in direct contact but in contact through other features therebetween. Moreover, the fact that the first feature is "above", "over" and "on the top of" the second feature includes that the first feature is directly above and obliquely above the second feature, or merely means that the horizontal height of the first feature is higher than that of the second feature. The fact that the first feature is "under", "beneath" and "underneath" the second feature includes that the first feature is directly below and obliquely below the second feature, or merely means that the horizontal height of the first feature is lower than that of the second feature.

[0045] In the description of this specification, the descriptions with reference to terms such as "one embodiment", "some embodiments", "example", "specific example", or "some examples", etc. mean that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present utility model. In this specification, the schematic descriptions of the above terms should not be understood as necessarily referring to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples. In addition, those skilled in the art can combine and combine the different embodiments or examples described in this specification.

[0046] Obviously, those skilled in the art can make various changes and modifications to the present utility model without departing from the spirit and scope of the present utility model. Thus, if these modifications and variations of the present utility model fall within the scope of the claims of the present utility model and their equivalent technologies, the present utility model also intends to include these changes and modifications.

[0047] The above is the specific implementation manner of the present utility model, but the protection scope of the present utility model is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present utility model can easily think of various equivalent modifications or substitutions, and these modifications or substitutions should all be covered by the protection scope of the present utility model. Therefore, the protection scope of the present utility model shall be subject to the protection scope of the claims.

Claims

1. A low-cost POE splitter, characterized in that: It includes an input unit, a signature circuit unit, an undervoltage lockout circuit unit, and an output unit. The input unit is connected to the signature circuit unit, the signature circuit unit is connected in parallel to the undervoltage lockout circuit unit, and the undervoltage lockout circuit unit is connected to the output unit.

2. The low-cost POE separator according to claim 1, characterized in that: The input unit includes an input terminal and a rectifying circuit unit, and the input terminal is connected to the rectifying circuit unit.

3. The low-cost POE separator according to claim 1, characterized in that: The signature circuit unit includes a first capacitor and a first resistor, and the first capacitor and the first resistor are connected in parallel.

4. The low-cost POE separator according to claim 3, characterized in that: The resistance of the first resistor is 24.9 kΩ.

5. The low-cost POE splitter according to claim 1, characterized in that: A through switch is included, and the through switch is connected to the under-voltage lockout circuit unit.

6. The low-cost POE splitter according to claim 5, characterized in that: The through switch is a MOS tube.

7. The low-cost POE splitter according to claim 1, characterized in that: The undervoltage lockout circuit unit includes a first diode, a second diode, a second resistor, and a third resistor; The first diode is connected in parallel with the second resistor, and the second diode is connected in series with the third resistor.

8. The low-cost POE splitter according to claim 7, characterized in that: The first diode and the second diode are voltage regulator diodes.

9. The low-cost POE splitter according to claim 7, characterized in that: The anode of the first diode is connected to the source of the pass switch, and the cathode of the first diode is connected to the gate of the pass switch. The anode of the second diode is connected to the gate of the pass switch.

10. The low-cost POE splitter according to claim 1, characterized in that: The output unit includes a control circuit unit and a switch circuit unit, and the control circuit unit is connected to the switch circuit unit.

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