System for realizing Ethernet port conversion

Abstract

The utility model relates to a system for realizing Ethernet port conversion, which comprises a PoE (Power over Ethernet) port input module, a transformer, a PoE port output module, an MCU (Microprogrammed Control Unit) detection switch, an MOS (Metal Oxide Semiconductor) switch, a 54V-to-12V step-down circuit, an adapter interface input module, a priority switch and a 12V-to-54V booster circuit, the output end of the transformer is respectively connected with the PoE network port output module, the MCU detection switch is connected with the transformer and is also connected with an A / D center tap of the transformer, the output end of the MCU detection switch is connected with the MOS switch, and the output end of the MOS switch is connected with the 54V-to-12V voltage reduction circuit. By adopting the system for realizing Ethernet port conversion, a low-cost and reliable-quality power supply mode is provided for converting the Ethernet into common direct-current power supply and converting the common direct-current power supply into Ethernet power supply, and the system can be used for transmitting data and supplying power to non-PoE equipment at the same time; and a common network port can be converted into an interface with a PoE function through power supply of an external adapter.

Description

Technical Field

[0001] The utility model relates to the field of network devices, in particular to the field of Ethernet conversion, and specifically refers to a system for realizing Ethernet port conversion. Background Art

[0002] Most Ethernet PSE products on the market only supply power to PD products with the same protocol and the same voltage, which requires the ports of the powered devices to match the ports and voltages of the PSE. This is unnecessary for many household low-voltage network devices. This utility model can convert an Ethernet PSE into a data port and a 12V DC power supply to supply the backend devices, and can also supply power to network devices without PoE function through a common 12V adapter to realize the Ethernet PSE function. This utility model bridges low-voltage network devices and PSE devices, enabling some original 12V-powered network devices to be extended and applied. Summary of the Utility Model

[0003] The purpose of the utility model is to overcome the above-mentioned disadvantages of the prior art and provide a system for realizing Ethernet port conversion that meets the requirements of low cost, reliable quality, and a relatively wide range of applications.

[0004] To achieve the above purpose, the system for realizing Ethernet port conversion of the utility model is as follows:

[0005] The system for realizing Ethernet port conversion mainly features that the system includes a PoE network port input module, a transformer, a PoE network port output module, an MCU detection switch, a MOS switch, a 54V to 12V step-down circuit, an adapter interface input module, a priority switch, and a 12V to 54V boost circuit. The output end of the PoE network port input module is connected to the transformer, the output end of the transformer is respectively connected to the PoE network port output module, the MCU detection switch is connected to the primary center tap of the transformer and also to the A / D center tap of the transformer, the output end of the MCU detection switch is connected to the MOS switch, the output end of the MOS switch is connected to the 54V to 12V step-down circuit, the output end of the adapter interface input module is connected to the priority switch, the output end of the priority switch is connected to the 12V to 54V boost circuit, and the output end of the 12V to 54V boost circuit is connected to the B / C center tap of the transformer.

[0006] Preferably, the PoE Ethernet port input module inputs data with PoE. When the adapter interface input port is vacant, the transformer separates data and the power supply 54V_IN. The transformer transmits the data to the PoE Ethernet port output module, and transmits the power supply 54V_IN to the MCU detection switch, and sends out a V_ON signal through the MCU detection switch to turn on the MOS switch. The 54V to 12V buck circuit receives 54V_IN and outputs a 12V_OUT DC power supply.

[0007] Preferably, the PoE Ethernet port input module inputs data with PoE. When 12V is input through the adapter interface, the transformer transmits the data to the PoE Ethernet port output module. The adapter interface input module transmits a 12V_AD signal to the priority switch, and the priority switch is not turned on, and the PoE Ethernet port output module outputs data.

[0008] Preferably, the PoE Ethernet port input module inputs data without PoE. When 12V is input through the adapter interface, the transformer transmits the data to the PoE Ethernet port output module. The adapter interface input module transmits a 12V_AD signal to the priority switch, and the priority switch is turned on. The 12V to 54V boost circuit outputs a 54V power supply to the B / C center tap of the transformer. The MCU detection module detects whether the backend device meets the standard of the powered device. If it meets the powered standard, then it pulls V_DTC to the ground to output a 54V voltage.

[0009] Preferably, the priority switch circuit includes a first triode Q1, a second MOS tube Q2, a first resistor R1, a second resistor R2, and a first diode D1. The gate and source of the second MOS tube Q2 are conducted. The second MOS tube Q2 is connected to the 12V to 54V boost circuit. The base of the first triode Q1 is connected to the 12V_OUT signal. The emitter of the first triode Q1 is grounded. The collector of the first triode Q1 is connected to the 12V_AD signal through the first resistor. One end of the second resistor R2 is connected to the first resistor R1, and the other end is grounded. The negative electrode of the first diode D1 is connected to the first resistor, and the positive electrode is grounded.

[0010] Preferably, the system further includes a second rectifier bridge D2 and a third rectifier bridge D3, and the second rectifier bridge D2 and the third rectifier bridge D3 are connected to the transformer.

[0011] The system for realizing Ethernet port conversion adopting the present utility model provides a low-cost and reliable power supply method for converting Ethernet into ordinary DC power supply and converting ordinary DC power supply into Ethernet power supply. It can supply power to non-PoE devices while transmitting data, and can also convert an ordinary network port into an interface with PoE function through external adapter power supply. Description of the Drawings

[0012] Figure 1 It is a schematic diagram of the port conversion design circuit of the system for realizing Ethernet port conversion of the present utility model.

[0013] Figure 2 It is a schematic diagram of the priority switch circuit of the system for realizing Ethernet port conversion of the present utility model.

[0014] Figure 3 It is the basic schematic diagram of the PoE port conversion of the system for realizing Ethernet port conversion of the present utility model. Detailed Embodiment

[0015] In order to be able to more clearly describe the technical content of the present utility model, the following will be further described in combination with specific embodiments.

[0016] The system for realizing Ethernet port conversion of the present utility model includes a PoE network port input module, a transformer, a PoE network port output module, an MCU detection switch, a MOS switch, a 54V to 12V step-down circuit, an adapter interface input module, a priority switch, and a 12V to 54V boost circuit. The output end of the PoE network port input module is connected to the transformer, the output end of the transformer is respectively connected to the PoE network port output module, the MCU detection switch is connected to the primary center tap of the transformer and also connected to the A / D center tap of the transformer, the output end of the MCU detection switch is connected to the MOS switch, the output end of the MOS switch is connected to the 54V to 12V step-down circuit, the output end of the adapter interface input module is connected to the priority switch, the output end of the priority switch is connected to the 12V to 54V boost circuit, and the output end of the 12V to 54V boost circuit is connected to the B / C center tap of the transformer.

[0017] As a preferred embodiment of the present utility model, when the PoE network port input module inputs data with PoE and the adapter interface input port is vacant, the transformer separates data and the power supply 54V_IN, the transformer transmits the data to the PoE network port output module, the transformer transmits the power supply 54V_IN to the MCU detection switch, and sends a V_ON signal through the MCU detection switch to turn on the MOS switch, and the 54V to 12V step-down circuit receives 54V_IN and outputs a 12V_OUT DC power supply.

[0018] As a preferred embodiment of the present utility model, the PoE network interface input module inputs data with PoE. When the adapter interface inputs 12V, the transformer transmits the data to the PoE network interface output module. The adapter interface input module transmits the 12V_AD signal to the priority switch. The priority switch is not turned on, and the PoE network interface output module outputs data.

[0019] As a preferred embodiment of the present utility model, the PoE network interface input module inputs data without PoE. When the adapter interface inputs 12V, the transformer transmits the data to the PoE network interface output module. The adapter interface input module transmits the 12V_AD signal to the priority switch. The priority switch is turned on, and the 12V to 54V boost circuit outputs a 54V power supply to the B / C center tap of the transformer. The MCU detection module detects whether the backend device meets the standard of the powered device. If it meets the power receiving standard, it pulls V_DTC to the ground to output a 54V voltage.

[0020] As a preferred embodiment of the present utility model, the priority switch circuit includes a first triode Q1, a second MOS tube Q2, a first resistor R1, a second resistor R2, and a first diode D1. The gate and source of the second MOS tube Q2 are conducted. The second MOS tube Q2 is connected to the 12V to 54V boost circuit. The base of the first triode Q1 is connected to the 12V_OUT signal. The emitter of the first triode Q1 is grounded. The collector of the first triode Q1 is connected to the 12V_AD signal through the first resistor. One end of the second resistor R2 is connected to the first resistor R1, and the other end is grounded. The negative pole of the first diode D1 is connected to the first resistor, and the positive pole is grounded.

[0021] As a preferred embodiment of the present utility model, the system further includes a second rectifier bridge D2 and a third rectifier bridge D3. The second rectifier bridge D2 and the third rectifier bridge D3 are connected to the transformer.

[0022] In the specific embodiment of the present utility model, as Figure 1 shown, when the PoE network interface inputs data with PoE and the adapter interface input port is vacant, the network interface signal is transmitted to the transformer, and the data and the power supply 54V_IN are separated respectively. The data is transmitted to the output network interface through the transformer. After the power supply 54V_IN successfully shakes hands with the PSE through the MCU simulating a PD device and issues a V_ON signal to turn on the MOS switch, the 54V_IN flows to the 54V to 12V buck circuit to output a 12V_OUT DC power supply, realizing the separate transmission of data and 12V power supply;

[0023] When the PoE network port inputs data with PoE and the adapter interface inputs 12V, the data is transmitted through the transformer to the output network port, and 12V_AD is input to the priority switch. This switch executes that the priority of 12V_OUT is greater than that of 12V_AD. That is, when the PoE network port inputs data with PoE, 12V_AD cannot open the switch to supply power to the 12V-to-54V boost circuit. Therefore, similar to the previous case, the output 12V power supply is converted by the PoE network port, and the network port outputs data;

[0024] When the PoE network port inputs data without PoE and the adapter interface inputs 12V, the data is transmitted through the transformer to the output network port. There is no 12V_OUT signal. 12V_AD is input to the priority switch to turn on the switch, supply power to the 12V-to-54V boost circuit, and output the 54V power supply 54V_OUT to the center tap B / C wire pair of the transformer. The signal V_DTC controlled by the MCU detection module is connected to the center tap A / D wire pair of the transformer, which is responsible for detecting whether the backend device meets the power receiving device standard. When the power receiving standard is met, V_DTC is pulled to the ground to output 54V voltage, realizing the conversion of the network port without PoE to the network port with PoE by inputting 12V low-voltage DC.

[0025] Such as Figure 2 As shown in the priority switch circuit, when 12V_OUT is at a high level, regardless of whether 12V_AD is at a high level or a low level, the G pole and S pole of MOS transistor Q2 are conducted, and the MOS is turned off; when 12V_OUT is at a low level and 12V_AD is at a high level, MOS transistor Q2 is conducted, and the 12V-to-54V boost conversion is performed through U1 to output the 54V power supply 54V_OUT.

[0026] Such as Figure 3 As shown in the basic schematic diagram of PoE port conversion, CN2 is the input of the PoE network port. The network port signal separates the differential voltage on the network port wire pair through the center tap of the primary side of transformer T1, and after the rectifier bridges D2 and D3, the 54V power supply 54V_IN is obtained. After 54V_IN is input to the MCU detection module, the MCU simulates the PD device to handshake with the front-end PSE device. After the handshake is successful, it controls the V_ON signal to be at a high level to turn on MOS transistor Q3. The 54V_IN is input to the 54V-to-12V step-down chip U3 for step-down, and the output is the 12V voltage 12V_OUT to the adapter output terminal CN4 to realize power supply to the outside. Combined with Figure 2It can be known that when the CN2 inputs a network port signal without PoE and the adapter input interface CN1 inputs a 12V power supply, 12V_AD is high and 12V_OUT is low. After being boosted by U1, 54V_OUT is obtained. 54V_OUT is connected to the center tap of the secondary of the transformer, corresponding to the network port B and C wire pairs. To achieve power supply, the negative voltage of the center tap corresponding to the network port A and D wire pairs, that is, V_DCT, is also required. V_DCT is a detection signal sent by the MCU detection module. When it is necessary to detect whether the rear-end powered device meets the power reception standard, V_DCT and 54V_OUT form a detection voltage of about 10V to detect the rear-end powered device. After detecting that it meets the power reception standard, V_DCT is conducted with GND_OUT. At this time, the secondary A and D wire pairs of the transformer are negative voltages, and the B and C wire pairs are positive voltages, with a voltage difference of 54V. Combined with the wire pair data, it is output to CN3, making CN3 a PoE network port and realizing the conversion from a common network port to a PoE network port.

[0027] The technical solution of the present invention is different from the prior art in that a secondary power supply is used for low-voltage power supply.

[0028] For the specific implementation solution of this embodiment, reference can be made to the relevant descriptions in the above embodiments, and details will not be repeated here.

[0029] It can be understood that the same or similar parts in the above embodiments can be referred to each other, and the content not detailed in some embodiments can be referred to the same or similar content in other embodiments.

[0030] It should be noted that in the description of the present utility model, terms such as "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance. In addition, in the description of the present utility model, unless otherwise specified, the meaning of "a plurality" refers to at least two.

[0031] In the description of this specification, the description with reference to terms such as "one embodiment", "some embodiments", "example", "specific example", or "some examples" means 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 representations of the above terms do not necessarily refer 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.

[0032] The system for realizing Ethernet port conversion adopting the present utility model provides a low-cost and reliable-quality power supply method for converting Ethernet to ordinary DC power supply and converting ordinary DC power supply to Ethernet power supply. It can be used to supply power to non-PoE devices while transmitting data, and can also convert a common network port into an interface with PoE function through external adapter power supply.

[0033] In this specification, the present utility model has been described with reference to its specific embodiments. However, it is obvious that various modifications and alterations can still be made without departing from the spirit and scope of the present utility model. Therefore, the specification and the drawings should be regarded as illustrative rather than restrictive.

Claims

1. A system for implementing Ethernet port conversion, characterized in that, The described system includes a PoE network interface input module, a transformer, a PoE network interface output module, an MCU detection switch, a MOS switch, a 54V to 12V step-down circuit, an adapter interface input module, a priority switch, and a 12V to 54V boost circuit. The output end of the PoE network interface input module is connected to the transformer. The output end of the transformer is respectively connected to the PoE network interface output module. The MCU detection switch is connected to the primary center tap of the transformer and also to the A / D center tap of the transformer. The output end of the MCU detection switch is connected to the MOS switch. The output end of the MOS switch is connected to the 54V to 12V step-down circuit. The output end of the adapter interface input module is connected to the priority switch. The output end of the priority switch is connected to the 12V to 54V boost circuit. The output end of the 12V to 54V boost circuit is connected to the B / C center tap of the transformer.

2. The system for implementing Ethernet port conversion according to claim 1, wherein When the PoE network interface input module inputs data with PoE and the adapter interface input port is vacant, the transformer separates the data and the power supply 54V_IN. The transformer transmits the data to the PoE network interface output module. The transformer transmits the power supply 54V_IN to the MCU detection switch, and sends out a V_ON signal through the MCU detection switch to turn on the MOS switch. The 54V to 12V step-down circuit receives 54V_IN and outputs a 12V_OUT DC power supply.

3. The system for implementing Ethernet port conversion according to claim 1, characterized in that, When the PoE network interface input module inputs data with PoE and the adapter interface inputs 12V, the transformer transmits the data to the PoE network interface output module. The adapter interface input module transmits a 12V_AD signal to the priority switch. The priority switch does not turn on, and the PoE network interface output module outputs data.

4. The system for implementing Ethernet port conversion according to claim 1, characterized in that, When the PoE network interface input module inputs data without PoE and the adapter interface inputs 12V, the transformer transmits the data to the PoE network interface output module. The adapter interface input module transmits a 12V_AD signal to the priority switch. The priority switch turns on. The 12V to 54V boost circuit outputs a 54V power supply to the B / C center tap of the transformer. The MCU detection switch detects whether the backend device meets the power receiving device standard. If it meets the power receiving standard, it pulls V_DTC to the ground to output a 54V voltage.

5. The system for implementing Ethernet port conversion according to claim 1, characterized in that, The described priority switch circuit includes a first triode Q1, a second MOS transistor Q2, a first resistor R1, a second resistor R2, and a first diode D1. The gate and source of the second MOS transistor Q2 are conducted. The second MOS transistor Q2 is connected to a 12V to 54V boost circuit. The base of the first triode Q1 is connected to the 12V_OUT signal. The emitter of the first triode Q1 is grounded. The collector of the first triode Q1 is connected to the 12V_AD signal through the first resistor. One end of the second resistor R2 is connected to the first resistor R1, and the other end is grounded. The negative electrode of the first diode D1 is connected to the first resistor, and the positive electrode is grounded.

6. The system for implementing Ethernet port conversion according to claim 1, characterized in that, The system further includes a second rectifier bridge D2 and a third rectifier bridge D3. The second rectifier bridge D2 and the third rectifier bridge D3 are connected to the transformer.

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