Power supply and load device

Abstract

The embodiment of the application discloses a power supply and receiving device, which comprises a switching module, a first terminal, a power receiving circuit and a power supply circuit. The switching module comprises a first connecting end, a second connecting end and a third connecting end, and the first terminal is electrically connected with the first connecting end. The power receiving circuit comprises a power receiving chip and a control module, the input end of the power receiving chip is electrically connected with the second connecting end, and the output end of the power receiving chip is electrically connected with the control module. The power supply circuit comprises a power supply chip and a power supply interface, the output end of the power supply chip is electrically connected with the third connecting end, the power supply interface is electrically connected with the input end of the power supply chip, and the power supply interface is electrically connected with the control module. When the power supply interface is not powered, the first connecting end and the second connecting end are electrically connected. The power supply and receiving device switches the first terminal between the power receiving mode and the power supply mode according to the power supply state of the power supply interface, and the flexibility of the power supply and receiving device is enhanced.

Description

Technical Field

[0001] This application relates to the field of power supply and receiving technology in communications, and more particularly to a power supply and receiving device. Background Technology

[0002] Power over Ethernet (PoE) is a technology that transmits data signals to devices that support the Internet Protocol (IP) (hereinafter referred to as IP devices) while simultaneously supplying power to the corresponding IP devices.

[0003] A complete PoE system consists of two PoE devices: a power sourcing equipment (PSE) and a powered device (PD). The PSE and PD are connected via a network cable. Specifically, the PD connects to the PSE through an input interface and receives power from the connected PSE. For example, the PSE can be a main router, and the PD can be a sub-router. Alternatively, the PD can be a terminal device such as an IP phone, IP camera, personal computer (PC), or set-top box.

[0004] In related technologies, multi-cascaded devices have two RJ45 ports. One RJ45 port is a power supply terminal to power other devices, and the other RJ45 port is a power receiving terminal to power itself. However, the two RJ45 ports look identical, and users sometimes mistakenly plug them into the wrong ports. Utility Model Content

[0005] This application provides a power supply and receiving device that can improve the technical problem that users sometimes plug in the network port incorrectly.

[0006] In a first aspect, embodiments of this application provide a power supply and receiving device, comprising a switching module, a first terminal, a power receiving circuit, and a power supply circuit. The switching module includes a first connection terminal, a second connection terminal, and a third connection terminal, and has a first connection state and a second connection state. In the first connection state, the first connection terminal is electrically connected to the second connection terminal; in the second connection state, the first connection terminal is electrically connected to the third connection terminal. The first terminal is electrically connected to the first connection terminal. The power receiving circuit includes a power receiving chip and a control module. The input terminal of the power receiving chip is electrically connected to the second connection terminal; the output terminal of the power receiving chip is electrically connected to the control module. The power supply circuit includes a power supply chip and a power interface. The output terminal of the power supply chip is electrically connected to the third connection terminal; the power interface is electrically connected to the input terminal of the power supply chip and the power interface is electrically connected to the control module. When the power interface is not energized, the switching module is in the first connection state.

[0007] The power supply and receiving device in this application embodiment has a power interface. When the power interface is connected to an external power source, the power supply and receiving device can be powered by the external power source. When the power interface is not powered, the first terminal is in power receiving mode by default. When the first terminal is powered, the power receiving chip can immediately perform protocol negotiation and power supply to the power supply and receiving device, thereby enabling the power supply and receiving device to be woken up and started immediately, improving the response speed of the power supply and receiving device.

[0008] In some exemplary embodiments, when the power interface is powered, the switching module is in the second connection state. Alternatively, when the power interface is powered, the switching module is in the first connection state, and when the first terminal is connected to a powered device, the switching module is in the second connection state.

[0009] Based on the above embodiments, when the power interface is powered, the first terminal can supply power to the outside. The power supply and receiving device automatically controls the switching module to change the connection state between each connection terminal according to the power receiving state of the power interface, so that the switching module switches between the first connection state and the second connection state, realizing the intelligent switching of the first terminal between the power receiving mode and the power supply mode, enhancing the flexibility and adaptability of the power supply and receiving device, and enabling it to autonomously select the optimal power supply strategy in different scenarios.

[0010] In some exemplary embodiments, the power supply and receiving device further includes a first transistor, a first terminal of which is electrically connected to the power interface, a second terminal of which is electrically connected to the power supply chip, and a controlled terminal of which is electrically connected to the control module.

[0011] Based on the above embodiments, by setting a first transistor and having its on / off state precisely controlled by the control module, intelligent enable control of the power supply chip is realized. This not only avoids the power supply chip from wasting power when it is not needed, but also enables the power supply path to be quickly cut off when an anomaly is detected, significantly improving the system's energy efficiency and safety.

[0012] In some exemplary embodiments, the power supply and receiving device further includes a boost module, the input terminal of which is electrically connected to the second terminal of the first transistor, and the output terminal of which is electrically connected to the power supply chip.

[0013] Based on the above embodiments, the addition of a boost module enables the power supply chip to operate at the required voltage even when the input voltage at the power interface is low. This broadens the compatibility range of external power supplies, allows the device to use power supplies of various specifications, and enhances the versatility and practicality of the device.

[0014] In some exemplary embodiments, the power supply and receiving device further includes a rectifier module, the input terminal of which is electrically connected to the second connection terminal, and the output terminal of which is electrically connected to the power receiving chip.

[0015] Based on the above embodiments, the rectifier module can perform polarity correction on the power input from the first terminal. Regardless of whether the input is positive or negative, it can ensure that the powered chip is provided with DC power of the correct polarity, effectively preventing equipment damage caused by incorrect connection and improving the fault tolerance and reliability of the equipment.

[0016] In some exemplary embodiments, the switching module includes a double-pole double-throw switch, with the fixed end of the double-pole double-throw switch serving as the first connection end, the normally closed end of the double-pole double-throw switch serving as the second connection end, and the normally open end of the double-pole double-throw switch serving as the third connection end.

[0017] Based on the above embodiments, a double-pole double-throw switch is used as the switching module. Its "normally closed-normally open" mechanical characteristics perfectly match the "power receiving priority" logic. The double-pole double-throw switch has a simple structure, low cost, and extremely high reliability, ensuring the synchronous switching of signal and power lines.

[0018] In some exemplary embodiments, the power supply and receiving device further includes a transformer module, the input terminal of which is electrically connected to the power receiving chip, and the output terminal of which is electrically connected to the control module.

[0019] Based on the above embodiments, the transformer module can convert the unstable voltage output by the powered chip into a stable, low-voltage power supply, providing a clean operating voltage for the control module, ensuring the stability of the control module's operation, and avoiding system restarts or logic errors caused by voltage fluctuations.

[0020] In some exemplary embodiments, the power supply and receiving device further includes a rectifier chip, a first end of which is electrically connected to the output terminal of the transformer module, and a second end of which is electrically connected to the control module.

[0021] Based on the above embodiments, adding a rectifier chip after the transformer module can further filter out voltage ripple and noise, providing a clean and stable DC power supply for the control module. This is crucial for MCUs handling precise logic control, further enhancing the overall system's anti-interference capability and operational reliability.

[0022] In some exemplary embodiments, the power supply and receiving device further includes a voltage divider detection unit electrically connected to the first terminal, the voltage divider detection unit being used to detect the voltage of the device connected to the first terminal, and the control module being electrically connected to the voltage divider detection unit.

[0023] Based on the above embodiments, the voltage divider detection unit can actively detect the type of device (PSE or PD) connected to the first terminal, providing the control module with key decision information, enabling it to achieve more intelligent and forward-looking mode switching, rather than relying solely on the power interface status, thus avoiding potential conflicts or competition scenarios.

[0024] In some exemplary embodiments, the power supply and receiving device further includes a second transistor connected to the controlled terminal of the switching module. The controlled terminal of the switching module is used to switch the connection state between each connection terminal in the first connection state and the second connection state. The control module is connected to the controlled terminal of the second transistor.

[0025] Based on the above embodiments, the electrical signal of the control module is converted into the drive signal required by the switching module (such as a relay) through the second transistor, thereby achieving the goal of controlling a large current load with a small current. This not only protects the control module but also allows the selection of a high-reliability switching module (such as a mechanical relay) that requires a larger drive current, enhancing the robustness of the entire switching drive. Attached Figure Description

[0026] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0027] Figure 1 This is a block diagram of a power supply and receiving device in one embodiment of this application; Figure 2This is a block diagram of a power supply and receiving device in another embodiment of this application; Figure 3 This is a block diagram of a power supply and receiving device in another embodiment of this application; Figure 4 This is a block diagram of a power supply and receiving device in another embodiment of this application; Figure 5 This is a block diagram of a power supply and receiving device in another embodiment of this application; Figure 6 This is a block diagram of a power supply and receiving device in another embodiment of this application; Figure 7 This is a block diagram of a power supply and receiving device in another embodiment of this application; Figure 8 This is a block diagram of a power supply and receiving device in another embodiment of this application; Figure 9 This is a block diagram of a power supply and receiving device in another embodiment of this application; Figure 10 This is a block diagram of a power supply and receiving device in another embodiment of this application.

[0028] Explanation of reference numerals in the attached drawings: 100, power supply and receiving device; 110, switching module; 111, first connection terminal; 112, second connection terminal; 113, third connection terminal; 114, fourth connection terminal; 120, first terminal; 130, power interface; 140, receiving chip; 150, power supply chip; 161, control module; 162, first transistor; 163, boost module; 171, rectifier module; 172, transformer module; 173, rectifier chip; 181, voltage divider detection unit; 182, second transistor; 190, second terminal. Detailed Implementation

[0029] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0030] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in the embodiments of this application are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0031] Furthermore, the use of terms such as "first," "second," etc., in this application is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0032] In this application, unless otherwise expressly specified and limited, the terms "connection," "fixed," etc., should be interpreted broadly. For example, "fixed" can mean a fixed connection, a detachable connection, or an integral part; it can mean a mechanical connection or an electrical connection; it can mean a direct connection or an indirect connection through an intermediate medium; it can mean the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0033] Furthermore, the technical solutions of the various embodiments of this application can be combined with each other, but only if they are based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such combination of technical solutions does not exist and is not within the scope of protection claimed by this application.

[0034] Power over Ethernet (PoE) is a technology that transmits data signals to devices that support the Internet Protocol (IP) (hereinafter referred to as IP devices) while simultaneously supplying power to the corresponding IP devices.

[0035] A complete PoE system consists of two PoE devices: a power sourcing equipment (PSE) and a powered device (PD). The PSE and PD are connected via a network cable. Specifically, the PD connects to the PSE through an input interface and receives power from the connected PSE. For example, the PSE can be a main router, and the PD can be a sub-router. Alternatively, the PD can be a terminal device such as an IP phone, IP camera, personal computer (PC), or set-top box.

[0036] In related technologies, multi-cascaded devices have two RJ45 ports. One RJ45 port is a power supply terminal to power other devices, and the other RJ45 port is a power receiving terminal to power itself. However, the two RJ45 ports look identical, and users sometimes mistakenly plug them into the wrong ports.

[0037] To address this, the inventors designed a network port power supply and receiving architecture that can automatically switch between being a power receiving terminal and a power supply terminal. The aim is to enable a single RJ45 network port to function as both a power receiving terminal and a power supply terminal, allowing a single RJ45 network port terminal to be compatible with both power supply and receiving methods. This better meets market demands and avoids the problem of wiring errors caused by the inability to distinguish between power receiving and power supply terminals.

[0038] like Figure 1-3 As shown in the figure, this application embodiment provides a power supply and receiving device 100, which includes a switching module 110, a first terminal 120, a power receiving circuit and a power supply circuit.

[0039] The switching module 110 includes a first connection terminal 111, a second connection terminal 112 and a third connection terminal 113. The switching module 110 has a first connection state and a second connection state. In the first connection state, the first connection terminal 111 of the switching module 110 is electrically connected to the second connection terminal 112. In the second connection state, the first connection terminal 111 of the switching module 110 is electrically connected to the third connection terminal 113.

[0040] The first terminal 120 is electrically connected to the first connection terminal 111. The first terminal 120 and the first connection terminal 111 can be electrically connected by means of wires, ribbon cables, circuit board traces, etc. The first terminal 120 can be an RJ45 female port.

[0041] The power receiving circuit includes a power receiving chip 140 and a control module 161. The input terminal of the power receiving chip 140 is electrically connected to the second connection terminal 112, and the output terminal of the power receiving chip 140 is electrically connected to the control module 161. The input terminal of the power receiving chip 140 and the second connection terminal 112 can be electrically connected via wires, ribbon cables, circuit board traces, etc., and the output terminal of the power receiving chip 140 and the control module 161 can be electrically connected via wires, ribbon cables, circuit board traces, etc. The output terminal of the power receiving chip 140 is used to supply power to the power supply and receiving device 100 itself. When the first connection terminal 111 supplies power to the power receiving chip 140, the power receiving chip 140 can communicate via protocol to output the voltage required by the power supply and receiving device 100.

[0042] The power interface 130 is used to connect to the local power supply. The power interface 130 is electrically connected to the control module 161 and can supply power to the control module 161.

[0043] The power supply circuit includes a power supply chip 150 and a power interface 130. The power interface 130 is electrically connected to the input terminal of the power supply chip 150 and can also supply power to the power supply chip 150.

[0044] The output terminal of the power supply chip 150 is electrically connected to the third connection terminal 113. The power supply chip 150 can also be electrically connected to the first terminal 120 through the third connection terminal 113 to supply power externally. The power supply chip 150 can negotiate the power supply voltage with the powered device. For example, for standard PoE (compliant with the Institute of Electrical and Electronics Engineers (IEEE) 802.3af or IEEE 802.3at standards), the power supply chip 150 and the powered chip 140 can negotiate the power supply voltage through a handshake protocol, initially using low voltage (2-10V) detection, and switching to high voltage power supply after detecting the powered device.

[0045] like Figure 2 As shown, when power interface 130 is not powered, that is, when power interface 130 is not connected to a local power source, switching module 100 is in the first connection state. Switching module 110 switches to electrical connection between first connection terminal 111 and second connection terminal 112, and first terminal 120 is connected to power receiving chip 140, that is, first terminal 120 is the default power receiving terminal. At this time, the power supply and receiving device 100 draws power from the upstream device through the network cable. When first terminal 120 is powered, power receiving chip 140 can immediately negotiate the protocol and supply power to power supply and receiving device 100, thereby enabling power supply and receiving device 100 to be woken up and started immediately, improving the response speed of power supply and receiving device 100. It should be noted that when power interface 130 is not powered and first terminal 120 is not connected to power, power supply and receiving device 100 has no power supply. When power is lost, switching module 110 automatically switches to electrical connection between first connection terminal 111 and second connection terminal 112, and this process does not require power supply.

[0046] The power supply and receiving device 100 relies on standard PoE power supply, eliminating the need for additional power cables. Only a single network cable is required to transmit data and power, greatly simplifying the installation process, reducing cabling costs and complexity, and facilitating rapid deployment. This mode allows the power supply and receiving device 100 to seamlessly connect to any standard PoE network environment and be used as a terminal power receiving device.

[0047] like Figure 3As shown, when power interface 130 is powered, that is, when power interface 130 is connected to a local power source (such as an AC adapter or local power supply cabinet), control module 161 detects the presence of power and controls switching module 110 to operate. Switching module 100 is in the second connection state, and switching module 110 switches to electrically connecting the first connection terminal 111 and the third connection terminal 113. The first terminal 120 is electrically connected to the power supply chip 150. The first terminal 120 can serve as a power supply terminal to supply power to other powered devices. At this time, the power supply and receiving device 100 obtains energy from the local power source and becomes a power supply device, which can supply power to other downstream powered devices (such as cameras or APs) via a network cable. It should be noted that if power interface 130 is powered and the first terminal 120 is connected to a power supply device, since the power supply from power interface 130 is relatively more stable, the power supply and receiving device 100 can choose power interface 130 as the power supply interface. Since the first terminal 120 does not have a handshake protocol with the power supply device, the two do not supply power to each other. At this time, the switching module 100 can remain in the first connection state so that the first terminal 120 can supply power to the outside at any time, or the switching module 100 can remain in the second connection state so that the first terminal 120 can be used as a backup power interface.

[0048] When the power interface 130 is powered, the switching module 100 can also be temporarily in the first connection state. When the first terminal 120 is connected to the powered device, the switching module 100 switches to the second connection state.

[0049] The power supply and receiving device 100 in this embodiment can automatically control the switching module 110 to change the connection path according to the power supply status of the power interface 130, realizing intelligent switching of the first terminal 120 between the power receiving mode and the power supply mode, thus transforming the power supply and receiving device 100 from a power-consuming device into a power supply hub. This enhances the flexibility and adaptability of the power supply and receiving device 100, enabling it to autonomously select the optimal power supply strategy in different scenarios. This allows the power supply and receiving device 100 to power other devices in the network in scenarios where it is inconvenient to deploy PoE switches (such as small offices, homes, and remote locations), expanding the possibilities of network layout.

[0050] Moreover, the first terminal 120 can be used as a power supply terminal or a power receiving terminal. One terminal can perform different functions in different scenarios, thereby reducing the size and space occupation.

[0051] like Figure 4 As shown, in some embodiments, the power supply and receiving device 100 further includes a first transistor 162, the first end of the first transistor 162 being electrically connected to the power interface 130, the second end of the first transistor 162 being electrically connected to the power supply chip 150, and the controlled end of the first transistor 162 being electrically connected to the control module 161.

[0052] The first transistor 162 can be a MOSFET, a transistor, etc. The control module 161 can control the switching on and off of the power supply chip 150 and the power interface 130 through the first transistor 162, thereby achieving line isolation.

[0053] By setting the first transistor 162 and controlling its on / off state by the control module 161, intelligent enable control of the power supply chip 150 is realized. This not only avoids the power supply chip 150 from wasting power when it is not needed, but also enables the power supply path to be quickly cut off when an abnormality is detected, which significantly improves the energy efficiency and safety of the system.

[0054] like Figure 5 As shown, in some embodiments, the power supply and receiving device 100 further includes a boost module 163, the input terminal of which is electrically connected to the second terminal of the first transistor 162, and the output terminal of which is electrically connected to the power supply chip 150.

[0055] When the power supply device 100 is connected to a local power source, the local power source typically provides a voltage of 19V. This voltage is controlled by the first transistor 162, then boosted to 54V by the boost module 163, controlled by the power supply chip 150, and finally output to the first terminal 120 for external power supply.

[0056] When transmitting the same power, the current drawn by 54V transmission is only about one-third that of 19V transmission. This means more energy is effectively delivered to the receiving device instead of being wasted on cable overheating. For network cables up to 100 meters long, the efficiency improvement is significant. Lower cable and connector temperatures result in a more stable and secure system. Low-temperature operation slows down insulation aging and oxidation of port metal contacts, enhancing the long-term reliability of the entire connection system.

[0057] Additionally, network cables have resistance, which causes a voltage drop along the transmission path. During low-voltage transmission, the large current can create a significant voltage drop on the network cable, potentially resulting in a voltage reaching the receiving device that is lower than the minimum voltage required for its normal operation (e.g., the IEEE standard requires power supply equipment to provide a minimum of 44V). Boosting the voltage to 54V provides a higher "voltage margin," ensuring that even after attenuation over a 100-meter cable, the voltage at the receiving device remains at a sufficiently high level.

[0058] Finally, most internal chips in powered devices (such as camera SoCs and AP MCUs) require low-voltage DC power such as 3.3V, 5V, or 12V. These devices need a buck converter (DC-CDC Buck converter). The voltage difference between stepping down from 54V to 5V, compared to stepping down from 19V to 5V, usually means that a higher input voltage allows for the selection of more efficient and cost-effective buck topologies and components.

[0059] The addition of boost module 163 enables the power supply chip 150 to operate at the required voltage even when the input voltage of the power interface 130 is low. This expands the range of external power supply compatibility, allows the device to use power supplies of various specifications, and enhances the versatility and practicality of the device.

[0060] like Figure 6 As shown, in some embodiments, the power supply and receiving device 100 further includes a rectifier module 171. The input terminal of the rectifier module 171 is electrically connected to the second connection terminal 112, and the output terminal of the rectifier module 171 is electrically connected to the power receiving chip 140. The rectifier module 171 is used for rectification and can be a rectifier diode bridge rectifier.

[0061] The rectifier module 171 can improve port polarity compatibility. Regardless of whether the power supply method used at the other end of the network cable is Alternative A (powering with the data line pair) or Alternative B (powering with the idle line pair), and regardless of whether the wiring sequence is T568A or T568B, the rectifier module 171 can correct it to a uniform DC polarity input to the power receiving chip 140 or the power supply chip 150. This eliminates the risk of equipment malfunction or damage caused by uncertain wiring polarity, and greatly enhances the compatibility and robustness of the power supply and receiving device 100.

[0062] The rectifier module 171 can perform polarity correction on the power input from the first terminal 120. Regardless of whether the input is positive or negative, it can ensure that the powered chip 140 is provided with DC power of the correct polarity, effectively preventing equipment damage caused by incorrect connection and improving the fault tolerance and reliability of the equipment.

[0063] In some embodiments, the switching module 110 includes a double-pole double-throw switch, with the fixed terminal of the double-pole double-throw switch serving as the first connection terminal 111, the normally closed terminal of the double-pole double-throw switch serving as the second connection terminal 112, and the normally open terminal of the double-pole double-throw switch serving as the third connection terminal 113. The double-pole double-throw switch can be a relay.

[0064] Double-pole double-throw (DPDT) switches can simultaneously switch between positive and negative terminals, replacing multiple single-pole switches. This simplifies circuit board design, reduces the number of components, improves reliability, and lowers costs. The "double-pole" design ensures that power lines switch synchronously and consistently, preventing data errors or circuit failures caused by asynchronous switching. The physically separated normally open and normally closed contacts of a DPDT provide excellent electrical isolation between the power supply and receiving circuits, preventing mutual interference.

[0065] A double-pole double-throw switch (DPDS) is used as the switching module 110. Its normally closed-normally open mechanical characteristics perfectly match the "power priority" logic. When the power supply device 100 is without power, after the external network port power supply is connected, the DPDS, without power, defaults to PD mode, and the entire device can be recognized and powered on upon power-up. The DPDS's simple structure, low cost, and extremely high reliability ensure synchronous switching of signal and power lines.

[0066] like Figure 7 As shown, in some embodiments, the power supply and receiving device 100 further includes a transformer module 172, the input terminal of which is electrically connected to the power receiving chip 140, and the output terminal of which is electrically connected to the control module 161.

[0067] The transformer module 172 can convert the unstable voltage output by the power receiving chip 140 into a stable, low-voltage power supply, providing a clean operating voltage for the control module 161, ensuring the stability of the operation of the control module 161, and avoiding system restarts or logic errors caused by voltage fluctuations.

[0068] like Figure 8 As shown, in some embodiments, the power supply and receiving device 100 further includes a rectifier chip 173, the first end of which is electrically connected to the output end of the transformer module 172, and the second end of which is electrically connected to the control module 161.

[0069] Adding a rectifier chip 173 after the transformer module 172 can further filter out voltage ripple and noise, providing a clean and stable DC power supply for the control module 161. This is crucial for the MCU handling precise logic control, further enhancing the overall system's anti-interference capability and operational reliability.

[0070] When the first terminal 120 is a power receiving terminal, the network power supply entering the first terminal 120 is rectified by the rectifier module 171 and then sent to the power receiving chip 140. After passing through the transformer module 172 and the synchronous rectifier chip 173, it supplies power to the control module 161.

[0071] like Figure 9 As shown, in some embodiments, the power supply and receiving device 100 further includes a voltage divider detection unit 181, which is electrically connected to the first terminal 120. The voltage divider detection unit 181 is used to detect the voltage condition of the device connected to the first terminal 120, thereby detecting whether the device connected to the first terminal 120 is a power supply device or a power receiving device. The control module 161 is electrically connected to the voltage divider detection unit 181, and the control module 161 controls the switching module 100 to switch between the first connection state and the second connection state according to the connected device condition.

[0072] The voltage divider detection unit 181 can actively detect the type (PSE or PD) of the device connected to the first terminal 120, providing key decision information to the control module 161. This enables the control module 161 to perform mode switching more intelligently, rather than relying solely on the state of the power interface 130, thus avoiding potential conflicts or competition. When the PSE needs to supply power externally, the entire unit needs to be powered by DC_IN 19V. During normal power-on operation, the voltage divider detection unit via the RJ45 port identifies whether the device connected to the first terminal 120 is a power supply device or a receiving device, thereby controlling the electromagnetic relay to switch modes.

[0073] like Figure 9 As shown, in some embodiments, the power supply and receiving device 100 further includes a second transistor 182, which is connected to the controlled terminal of the switching module 110. The controlled terminal of the switching module 110 is used to switch the connection state between each connection terminal in the first connection state and the second connection state. The control module 161 is connected to the controlled terminal of the second transistor 182.

[0074] For example, the switching module 110 is a double-pole double-throw electromagnetic relay, which has two moving contacts, two normally open stationary contacts, and two normally closed stationary contacts. The two moving contacts are electrically connected to the first terminal 120, the two normally open stationary contacts are electrically connected to the input terminal of the power receiving chip 140, and the two normally closed stationary contacts are electrically connected to the output terminal of the power supply chip 150.

[0075] The coil of the double-pole double-throw electromagnetic relay serves as the controlled terminal. A second transistor 182 is connected in series with the coil. When the second transistor 182 is turned on, the coil of the double-pole double-throw electromagnetic relay is energized, and the two moving contacts move to contact the two normally open stationary contacts respectively. When the second transistor 182 is turned off, the coil of the double-pole double-throw electromagnetic relay is de-energized, and the two moving contacts move to contact the two normally closed stationary contacts respectively.

[0076] The second transistor 182 can be a MOSFET, a transistor, etc. The control module 161 can control the switching module 110 through the second transistor 182 to switch the switching module 110 between the first connection state and the second connection state. The drive current of the control module 161 is usually small and difficult to directly drive the switching module 110. However, the second transistor 182 can act as a current amplifier. The control module 161 only needs to provide a very small base / gate current (usually only 1-5mA) to control the second transistor 182, and then the second transistor 182 will bear the large current required to drive the switching module 110.

[0077] The electrical signal from the control module 161 is converted into the drive signal required by the switching module 110 (such as a relay) by the second transistor 182, thus achieving the goal of controlling a large current load with a small current. This not only protects the control module 161, but also allows the selection of a high-reliability switching module 110 (such as a mechanical relay) that requires a larger drive current, enhancing the robustness of the entire switching drive.

[0078] like Figure 10 As shown, in some embodiments, the switching module 110 further includes a fourth connection terminal 114, which can be electrically connected to the second connection terminal 112 or the third connection terminal 113. The power supply and receiving device 100 also includes a second terminal 190, which is connected to the fourth connection terminal 114. The second terminal 190 and the first fourth connection terminal can be electrically connected via wires, ribbon cables, circuit board traces, etc., and the second terminal 190 can be an RJ45 female port.

[0079] The switching module 110 also has a third connection state, a fourth connection state, a fifth connection state, and a sixth connection state.

[0080] When the switching module 100 is in the third connection state, the switching module 110 switches to the first connection terminal 111 and the third connection terminal 113 for electrical connection, and the fourth connection terminal 114 and the second connection terminal 112 for electrical connection. At this time, the first terminal 120 serves as the power supply terminal and the second terminal 190 serves as the power receiving terminal.

[0081] When the switching module 100 is in the fourth connection state, the switching module 110 switches to the first connection terminal 111 and the second connection terminal 112 to be electrically connected, and the fourth connection terminal 114 and the third connection terminal 113 to be electrically connected. At this time, the first terminal 120 is used as the power receiving terminal and the second terminal 190 is used as the power supply terminal.

[0082] When the switching module 100 is in the fifth connection state, the switching module 110 switches to the first connection terminal 111 and the third connection terminal 113 are electrically connected, and the fourth connection terminal 114 is electrically connected to the third connection terminal 113. At this time, the first terminal 120 is used as a power supply terminal, and the second terminal 190 is used as a power supply terminal.

[0083] When the switching module 100 is in the sixth connection state, the switching module 110 switches to the first connection terminal 111 and the second connection terminal 112 are electrically connected, and the fourth connection terminal 114 is electrically connected to the second connection terminal 112. At this time, the first terminal 120 is used as the power receiving terminal and the second terminal 190 is used as the power receiving terminal.

[0084] It should be noted that in this embodiment, the voltage divider detection unit 181 can be electrically connected to the first terminal 120 and the second terminal 190. The voltage divider detection unit 181 can detect the voltage of the first terminal 120 and the second terminal 190, thereby detecting whether the device connected to the first terminal 120 is a power supply device or a power receiving device, and whether the device connected to the second terminal 190 is a power supply device or a power receiving device. The control module 161 controls the switching module 100 to switch between the third connection state, the fourth connection state, the fifth connection state and the sixth connection state according to the connected device status.

[0085] In some embodiments, the power supply and receiving device 100 includes one of a multi-level microphone, a conference control screen, a camera, and a router.

[0086] Multi-level microphones can be connected in series to form a linear array microphone, and cameras can be connected in series to form a camera chain. The conference control panel can be powered via PoE and can also power its connected peripheral devices (such as another secondary screen and microphones), becoming the power and data hub of the desktop.

[0087] Routers act as edge nodes in a network environment, flexibly accepting power from upstream devices and providing power and network access to downstream devices (such as sensors and access points).

[0088] A standard Category 5 network cable has four twisted pairs. IEEE 80 2.3af allows two power supply methods using different wiring sequences: one transmits current through pairs 4, 5, 7, and 8, with pairs 4 and 5 being positive and pairs 7 and 8 being negative. The other method transmits power through pairs 1, 2, 3, and 6, with arbitrary polarity; pairs 1 and 2 are positive, and pairs 3 and 6 are negative, or pairs 1 and 2 are negative, and pairs 3 and 6 are positive.

[0089] The above description is merely a preferred embodiment of this application and does not limit the patent scope of this application. Any equivalent structural transformations made based on the concept of this application and the contents of the specification and drawings of this application, or direct / indirect applications in other related technical fields, are included within the patent protection scope of this application.

Claims

1. A power supply and receiving device, characterized in that, include: A switching module includes a first connection terminal, a second connection terminal, and a third connection terminal. The switching module has a first connection state and a second connection state. In the first connection state, the first connection terminal is electrically connected to the second connection terminal; in the second connection state, the first connection terminal is electrically connected to the third connection terminal. The first terminal is electrically connected to the first connection terminal; The power receiving circuit includes a power receiving chip and a control module, wherein the input terminal of the power receiving chip is electrically connected to the second connection terminal; and the output terminal of the power receiving chip is electrically connected to the control module. The power supply circuit includes a power supply chip and a power interface. The output terminal of the power supply chip is electrically connected to the third connection terminal. The power interface is electrically connected to the input terminal of the power supply chip and to the control module. When the power interface is not powered, the switching module is in the first connection state.

2. The power supply and receiving device according to claim 1, characterized in that, When the power interface is powered, the switching module is in the second connection state; or, when the power interface is powered, the switching module is in the first connection state, and when the first terminal is connected to the powered device, the switching module is in the second connection state.

3. The power supply and receiving device according to claim 1, characterized in that, The power supply and receiving device further includes a first transistor, a first terminal of which is electrically connected to the power interface, a second terminal of which is electrically connected to the power supply chip, and a controlled terminal of which is electrically connected to the control module.

4. The power supply and receiving device according to claim 3, characterized in that, The power supply and receiving device further includes a boost module, the input terminal of which is electrically connected to the second terminal of the first transistor, and the output terminal of which is electrically connected to the power supply chip.

5. The power supply and receiving device according to claim 1, characterized in that, The switching module includes a double-pole double-throw switch, with the fixed end of the double-pole double-throw switch serving as the first connection end, the normally closed end of the double-pole double-throw switch serving as the second connection end, and the normally open end of the double-pole double-throw switch serving as the third connection end.

6. The power supply and receiving device according to claim 1, characterized in that, The power supply and receiving device further includes a rectifier module, the input terminal of which is electrically connected to the second connection terminal, and the output terminal of which is electrically connected to the power receiving chip.

7. The power supply and receiving device according to claim 1, characterized in that, The power supply and receiving device also includes a transformer module, the input terminal of which is electrically connected to the power receiving chip, and the output terminal of which is electrically connected to the control module.

8. The power supply and receiving device according to claim 7, characterized in that, The power supply and receiving device also includes a rectifier chip, the first end of which is electrically connected to the output end of the transformer module, and the second end of which is electrically connected to the control module.

9. The power supply and receiving device according to claim 1, characterized in that, The power supply and receiving device further includes a voltage divider detection unit, which is electrically connected to the first terminal. The voltage divider detection unit is used to detect the voltage of the device connected to the first terminal, and the control module is electrically connected to the voltage divider detection unit.

10. The power supply and receiving device according to claim 1, characterized in that, The power supply and receiving device further includes a second transistor, which is connected to the controlled terminal of the switching module. The controlled terminal of the switching module is used to switch the connection state between each connection terminal in the first connection state and the second connection state. The control module is connected to the controlled terminal of the second transistor.

11. The power supply and receiving device according to any one of claims 1-10, characterized in that, The power supply and receiving device includes one of the following: multi-level microphone, conference control screen, camera, and router.

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