TWI779955B - Ethernet power supply and method of intelligent power saving control the same - Google Patents

Abstract

An Ethernet power supply receives a DC voltage through a bus positive pole and a bus negative pole, and is coupled to a load equipment through the bus positive pole. The Ethernet power supply includes a first control module and a second control module, the first control module is used to provide a first control signal through the bus negative pole to confirm whether the load equipment is a valid load, and the second control module is used to turn on or off an electrical coupling relationship between the bus positive pole and the first control module according to whether the load equipment is connected or not.

Description

Ethernet power supply and its power saving control method

The present invention relates to an Ethernet network power supply and its control method, especially to an Ethernet network power supply with power saving function and its power saving control method.

Most of the products currently on the market use full-time first control signal communication between the power supply (Power Source Equipment (PSE)) and the load Power Device (PD) to determine whether the PSE should supply power to the correct load PD. Therefore, even if the load PD is When not connected, the PSE will continue to send the first control signal for detection, resulting in power loss. As a result, the current Ethernet power supply cannot meet the requirements of the current energy efficiency regulations (Ex: DoE, EC CoC, etc.), and its circuit structure diagram is shown in Figure 1 below.

When this circuit design realizes the communication of the first control signal all the time, even if the load PD system has been removed, the controller PSE controller of the power supply will continue to send the first control signal to consume power, so the current situation cannot be achieved. Efficiency energy regulations (Ex: DoE, EC CoC... etc.) regulate the power consumption (No Load Power) under no-load conditions.

Therefore, how to design an Ethernet power supply and its power-saving control method, so that when the load device is not connected to the Ethernet power supply, the PSE controller inside the power supply is powered off and stops working The status of this case is a major subject of research that the author of this case wants to study.

In order to solve the above problems, the present invention provides an Ethernet power supply to overcome the problems of the prior art. Therefore, the Ethernet power supply of the present invention is coupled to the positive terminal and the negative terminal of the load device through the bus positive terminal and the bus negative terminal and receives the DC voltage. The Ethernet power supply includes a first control module and a second control module, and the second control module includes a path control circuit, a first control loop, and a second control loop. The first control module includes a power supply terminal, and the other terminal is coupled to the negative pole of the bus and is used to control the power supplied by the Ethernet power supply to the load device. The second control module is coupled to the first control module, the positive pole of the bus and the negative pole of the bus. The path control circuit is used to turn on or turn off the coupling relationship between the power supply terminal and the positive pole of the bus. The first control loop is coupled to the bus negative pole and the path control circuit, and is used for providing a first control signal to turn on the path control circuit according to the access transient phase when the negative terminal is connected to the bus negative pole. The second control loop is coupled to the first control module and the path control circuit, and is used to conduct the path control circuit according to the second control signal provided by the first control module. Among them, the negative pole of the bus provides the first control signal according to the negative terminal connected to or withdrawn from the negative pole of the bus; the first control module provides the second control signal; The off-path control circuit; and the first control module is used to be in the power-on working state according to the conduction of the path control circuit, and is used to be in the power-off stop working state according to the off-path control circuit.

In order to solve the above problems, the present invention provides an Ethernet power supply to overcome the problems of the prior art. Therefore, the Ethernet power supply of the present invention is coupled to the positive terminal and the negative terminal of the load device through the bus positive terminal and the bus negative terminal and receives the DC voltage. The Ethernet power supply includes a first control module and a second control module, and the second control module includes a path control circuit, a first control loop, and a second control loop. The first control module includes a power supply terminal, and the other terminal is coupled to the negative pole of the bus and is used to control the power supplied by the Ethernet power supply to the load device. The second control module is coupled to the first control module, the positive pole of the bus and the negative pole of the bus, and the path control circuit is used for turning on or off the coupling relationship between the power supply end and the positive pole of the bus. The first control loop is coupled to the negative pole of the bus and the path control circuit, and is used to provide a valid signal of the first control loop to trigger the path control circuit from the off state to the on state according to the negative terminal connected to the bus negative pole, and the first control module corresponds to It is in the power-on working state. The second control loop is coupled to the first control module and the path control circuit, and is used to provide an invalid signal of the second control loop to trigger the path control circuit to turn from the on state to the off state according to the negative terminal being separated from the bus negative pole, and the first control loop The module corresponds to a power-off state. Wherein, when the first control module corresponds to the power-on working state, the first control module causes the second control loop to provide the second control loop invalid signal according to the negative terminal being pulled away from the bus negative pole.

In order to solve the above problems, the present invention provides a power saving control method of an Ethernet power supply to overcome the problems of the prior art. Therefore, the Ethernet power supply of the present invention receives a DC voltage and is coupled to the positive terminal and the negative terminal of the load device. The Ethernet power supply includes a first control module, and the first control module receives a DC voltage through the positive pole of the bus and the negative pole of the bus, and is coupled to the negative terminal through the negative pole of the bus, so as to provide a first control signal through the negative pole of the bus to confirm the load Whether the device is a payload. The power saving control method includes the following steps: (a) detecting whether the load device is connected or not, and turning on or off the path control circuit between the power terminal of the first control module and the positive pole of the bus. (b) Conducting the path control circuit through the first control loop according to the connection of the negative terminal to the negative pole of the bus. (c) According to the grounding of the negative pole of the bus, it is changed to pass through The second control loop conducts the path control circuit. (d) Shutting down the path control circuit according to the negative terminal pulling away from the bus negative terminal.

The main purpose and function of the present invention is that the Ethernet power supply detects whether the load device is connected to determine whether to enable the first control module to operate. When the load device is not connected to the Ethernet power supply, the second control module controls the first control module to power off and stop working, so as to save the power consumption of the Ethernet power supply, and Efficiency in compliance with energy regulations.

In order to further understand the technology, means and effects that the present invention adopts to achieve the predetermined purpose, please refer to the following detailed description and accompanying drawings of the present invention. It is believed that the purpose, characteristics and characteristics of the present invention can be obtained from this in depth and For specific understanding, however, the accompanying drawings are provided for reference and illustration only, and are not intended to limit the present invention.

L: power cord

100:Ethernet power supply

100-1: first end

100-2: second end

100-3: the third end

Bp: bus positive

Bn: bus negative

1: The first control module

1-1: Power terminal

12: Stabilized energy storage module

14: Power supply controller

VDD: power supply pin

Ec: communication terminal

Ec1: the first pin

Ec2: the second pin

16: Communication module

SWc: switch

2: The second control module

22: Path control circuit

222: Path switch

224: drive switch

24: The first control loop

SW1: first switching element

26: The second control loop

SW2: second switching element

3: Data conversion module

200: load equipment

200-1: Device interface

Ep: Positive extreme

En: Negative extreme

300: external device

Po: output power

Vdc: DC voltage

Vcc: supply voltage

Vc: terminal voltage

Vref1: the first reference voltage

Vref2: the second reference voltage

Sc1: the first control signal

Sc2: Second control signal

Sc3: The third control signal

Sc4: The fourth control signal

So: external signal

Se1: Valid signal of the first control loop

Sn1: invalid signal of the first control loop

Se2: Valid signal of the second control loop

Sn2: Second control loop invalid signal

Fig. 1 is a circuit block diagram of the Ethernet power supply with power saving function of the present invention; Fig. 2 is a detailed block diagram of the Ethernet power supply with power saving function of the present invention; Fig. 3A is the first circuit diagram of the present invention 2. The circuit block diagram of the first embodiment of the second control module; FIG. 3B is the circuit block diagram of the second embodiment of the second control module of the present invention; FIG. 4 is the circuit block diagram of the third embodiment of the second control module of the present invention ; and FIG. 5 is a method flow chart of the power saving control method of the Ethernet power supply of the present invention.

Hereby, the technical content and detailed description of the present invention are described as follows in conjunction with the drawings:

Please refer to FIG. 1 which is a circuit block diagram of an Ethernet power supply with power saving function according to the present invention. The Ethernet power supply 100 is used for providing the DC voltage Vdc to the load device 200 to supply power to the load device 200 . The Ethernet power supply 100 includes a first control module 1, a second control module 2 and a data conversion module 3, and the first control module 1 is coupled to the second control module 2 and the data conversion module 3 . The first control module 1 is coupled to the power line L through the first terminal 100-1 (the DC voltage Vdc, for example but not limited to, can be 20V~55V, depending on the specifications of the Ethernet power supply 100), so as to The bus positive pole Bp and the bus negative pole Bn receive the DC voltage Vdc provided by the power line L to operate. The data conversion module 3 is coupled to an external device 300 (such as but not limited to, a network camera, a central server) through the second end 100 - 2 to receive an external signal So provided by the external device 300 .

Specifically, the main purpose and function of the present invention is that the Ethernet power supply 100 detects whether the load device 200 is connected, so as to determine whether to supply power to the first control module 1 and make it operate. When the load device 200 is not connected to the Ethernet power supply 100, the second control module 2 controls the first control module 1 to power off and is in a state of stopping work, so as to save the power of the Ethernet power supply 100 Consumption, and comply with efficiency energy regulations (such as but not limited to, DoE, EC CoC, MEPS, Tier...etc.). When the load device 200 is connected to the Ethernet power supply 100, the second control module 2 controls the first control module 1 to be powered on and in a working state, so that the first control module 1 controls the Ethernet power supply The supplier 100 supplies power to load devices.

Please refer to FIG. 2 which is a detailed block diagram of the Ethernet power supply with power saving function of the present invention, and refer to FIG. 1 for the combination. The first control module 1 includes a power terminal 1 - 1 , and the other terminal is coupled to the negative bus Bn and used to control the power supplied by the Ethernet power supply 100 to the load device 200 . The second control module 2 includes a path control circuit 22 , a first control loop 24 and a second control loop 26 . Wherein, the bus negative pole Bn outputs the first control according to the connection of the negative terminal En of the load device 200 to or from the bus negative pole Bn. The control signal Sc1, the first control signal Sc1 may be but not limited to the DC voltage Vdc of the negative bus Bn. The path control circuit 22 is coupled to the power terminal 1 - 1 of the first control module 1 and the positive bus Bp for turning on or off the coupling relationship between the power terminal 1 - 1 and the positive bus Bp. The first control loop 24 is coupled to the negative bus Bn and the path control circuit 22, and is used for turning on the path control circuit 22 according to the first control signal Sc1 provided by the negative bus Bn. The second control loop 26 is coupled to the first control module 1 and the path control circuit 22 , and is used for turning on the path control circuit 22 according to the second control signal Sc2 provided by the first control module 1 .

Specifically, when the load device 200 is not connected to the Ethernet power supply 100 and the negative terminal En is not connected to the negative terminal Bn of the bus, the negative terminal Bn of the bus provides the DC voltage corresponding to the first control signal Sc1 Vdc is the state where the negative terminal En is not connected to the negative bus Bn and the negative bus Bn is not grounded, and the first control module 1 is in a power-off and stopped working state without providing the second control signal Sc2, so the first control loop 24 and The second control loop 26 enables the path control circuit 22 to turn off the coupling relationship between the power terminal 1 - 1 and the bus positive terminal Bp according to the states of the first control signal Sc1 and the second control signal Sc2 respectively.

Furthermore, when the load device 200 is connected to the Ethernet power supply 100 and the negative terminal En is connected to the negative terminal Bn of the bus, the Ethernet power supply 100 and the load device 200 will generate a first terminal 100-1. In the transient phase of connecting the bus positive pole Bp and the load device 200 to the bus negative pole Bn loop, the terminal voltage Vc of the bus negative pole Bn is raised and provided to the first control loop 24 as the first control signal Sc1, the first The control loop 24 provides a first control loop valid signal Se1 to the path control circuit 22 according to the first control signal Sc1 of the access transient phase. And, when the second control loop 26 is connected to the transient state, it provides the second control loop invalid signal Sn2 to the path control circuit 22 according to the first control module 1 is still in the power-off and stop working state. Therefore, the path control circuit 22 is turned on according to the effective signal Se1 of the first control loop, so as to be electrically coupled to the bus positive pole Bp at the power supply terminal 1-1, and the first control mode The group 1 receives the power supply voltage Vcc (or DC voltage Vdc) through the path control circuit 22 and is in the power-on working state.

Based on the above-mentioned embodiment, in the access transient phase and the first control module 1 is in the power-on working state, the above-mentioned first control module 1 starts to provide the third control signal Sc3 through the bus negative terminal Bn and the negative terminal En to connect with the load The device 200 performs handshake communication, and controls the status of the Ethernet power supply 100 supplying power to the load device 200 according to the result of the handshake communication. Wherein, the handshaking communication system between the first control module 1 and the load device 200 includes judging whether the load device 200 is a valid load or an invalid load. The first control module 1 and the load device 200 handshake communication and control the Ethernet power supply 100 to supply power to the load device 200 under the condition that the load device 200 is judged to be a valid load, and enter the power supply from the access transient state stage. And, when it is judged that the load device 200 is not loaded, the Ethernet power supply 100 is controlled to stop supplying power to the load device 200 , and to leave the power supply stage and enter the no power supply stage.

Please refer to Figure 1 and Figure 2, based on the foregoing embodiments, another specific embodiment is that the first control module 1 includes a voltage-stabilized energy storage module 12, a power supply controller 14, and a communication module 16, and the voltage-stabilized energy storage module The group 12 is coupled to the second control module 2 through the power terminal 1-1. Wherein, the voltage stabilizing energy storage module 12 can be, for example but not limited to, a voltage stabilizing circuit, an energy storage element, a converter, and other components or circuits with functions of voltage stabilizing, energy storage, or power conversion. The power supply controller 14 has a power supply pin VDD and a communication terminal Ec, the power supply pin VDD is coupled to the power supply terminal 1-1 through the energy storage module 12, and the communication terminal Ec is coupled to the second control module 2 and the communication module 16 . The communication terminal Ec may include a first pin Ec1 and a second pin Ec2 , the first pin Ec1 is coupled to the second control loop 26 , and the second pin Ec2 is coupled to the negative bus Bn through the communication module 16 . And, the power supply controller 14 is used to provide the second control signal Sc2 and the third control signal Sc3 respectively through the first pin Ec1 and the second pin Ec2 in the working state for corresponding control.

In addition, the aforementioned regulated energy storage module 12 is used to store the DC voltage Vdc as the power supply voltage Vcc, and stabilize the voltage value of the power supply voltage Vcc, so as to provide power for the power supply controller 14 to be powered on and in a working state. It is worth mentioning that if the power supply controller 14 can directly use the DC voltage Vdc to work, the voltage-stabilizing energy storage module 12 can also be omitted.

In the aforementioned second control module 2, the first control loop 24 is coupled to the bus negative pole Bn and the control terminal of the path control circuit 22, and the second control loop 26 is coupled to the first pin Ec1 of the power supply controller 14 and the path control circuit. 22 control terminal. Wherein, the first control loop 24 provides the first control loop effective signal Se1 to the path control circuit 22 according to the first control signal Sc1 in which the negative terminal En is connected to the negative terminal Bn of the bus and connected to the transient phase, so that the path control circuit 22 turns on the power terminal. 1-1 is electrically coupled to the bus positive pole Bp, and the power supply controller 14 is further in a power-on working state. The power supply controller 14 in the power-on working state provides the third control signal Sc3 through the second pin Ec2 and couples the bus negative pole Bn through the communication module 16 to perform handshake communication with the load device 200. The power supply controller 14 performs handshake communication according to the handshake communication The result corresponds to outputting the second control signal Sc2 from the first pin Ec1. The second control loop 26 provides the second control loop effective signal Se2 to the path control circuit 22 according to the second control signal Sc2 output by the first pin Ec1, and the path control circuit 22 turns on the power terminal 1- according to the second control loop effective signal Se2. 1 is electrically coupled with the positive pole Bp of the bus, so that the power supply controller 14 continues to maintain the power-on working state, and the power supply controller 14 controls the Ethernet power supply 100 to provide the DC voltage Vdc to the load device 200 and is in the supply state. power stage. And, the second control loop 26 provides the second control loop invalid signal Sn2 to the path control circuit 22 according to the first pin Ec1 not outputting the second control signal Sc2, and the path control circuit 22 turns off the power supply according to the second control loop invalid signal Sn2 Terminal 1-1 is electrically coupled to the bus positive pole Bp, so that the power supply controller 14 enters the power-off stop working state, and the power supply controller 14 controls the Ethernet power supply 100 to stop providing the DC voltage Vdc to the load device 200 And in the stage of no power supply.

The second pin Ec2 of the aforementioned power supply controller 14 provides a third control signal Sc3 via the communication module 16 coupled to the bus negative pole Bn to carry out handshake communication with the load device 200 to confirm whether the load device 200 is a valid load or an invalid load, and The power supply controller 14 outputs the second control signal Sc2 through the first pin Ec1 according to the load device 200 being a valid load, and the power supply controller 14 outputs the fourth control signal Sc4 through the first pin Ec1 according to the load device 200 being an invalid load. Wherein, the second control loop 26 provides the second control loop effective signal Se2 to the path control circuit 22 according to the second control signal Sc2 output by the first pin Ec1, and the path control circuit 22 turns on the power terminal according to the second control loop effective signal Se2 1-1 is electrically coupled with the bus positive pole Bp, so that the power supply controller 14 continues to maintain the power-on working state, and the power supply controller 14 controls the Ethernet power supply 100 to provide the DC voltage Vdc to the load device 200 and In the stage of power supply. And, the second control loop 26 outputs the fourth control signal Sc4 according to the first pin Ec1 to provide the second control loop invalid signal Sn2 to the path control circuit 22, and the path control circuit 22 turns off the power terminal according to the second control loop invalid signal Sn2 1-1 is electrically coupled with the bus positive pole Bp, so that the power supply controller 14 enters the power-off stop working state, and the power supply controller 14 controls the Ethernet power supply 100 to stop providing the DC voltage Vdc to the load device 200 and In the stage of no power supply.

Furthermore, the aforementioned power supply controller 14 couples the bus negative terminal Bn to ground according to the load device 200 being an effective load, and the power supply controller 14 turns off the bus negative terminal Bn to ground according to the load device 200 being an invalid load.

In the aforementioned specific embodiments, the communication module 16 may further include a switch SWc, and the first pin Ec1 is coupled to the control terminal of the switch SWc, one end of the switch SWc is grounded and the other end is coupled to the negative bus Bn. And, the second pin Ec2 is coupled to the bus negative electrode Bn through the communication module 16 . Therefore, the power supply controller 14 provides the second control signal Sc2 according to the effective load of the load device 200 to switch SWc is turned on, so that the negative pole of the bus Bn is coupled to the ground. And, the power supply controller 14 provides the fourth control signal Sc4 to turn off the switch SWc according to the load device 200 being an invalid load, so that the bus negative electrode Bn is turned off and grounded.

The aforementioned power supply controller 14 judges whether the load device 200 is a valid load or an invalid load according to the Ethernet power supply specification (such as but not limited to the IEEE802.3 Ethernet power supply specification). Wherein, the power supply controller 14 starts to provide the third control signal Sc3 to carry out handshake communication with the load device 200 through the negative terminal Bn and the negative terminal En of the bus, and controls the supply and load of the Ethernet power supply 100 according to the handshake communication result. Power for device 200 . Therefore, when the power supply controller 14 regards the load device 200 as an effective load and is in the stage of supplying power, the power supply controller 14 controls the power supplied to the load device 200 according to the definition of the Ethernet power supply specification.

In addition, the aforementioned Power over Ethernet specification can also be defined by the user-defined payload and invalid load, and can also be defined by the power range supplied when the user defines the payload.

The aforementioned first control loop 24 correspondingly provides the first control loop valid signal Se1 or the first control loop invalid signal Sn1 according to the bus negative Bn terminal voltage Vc corresponding to the first control signal Sc1. Wherein, the first control signal Sc1 corresponds to the connection transient phase when the negative terminal En is connected to the bus negative terminal Bn and the bus negative terminal Bn is not grounded, and the first control loop 24 provides the first control loop effective signal Se1 according to the first control signal Sc1 To the path control circuit 22 , the path control circuit 22 is turned on according to the effective signal Se1 of the first control loop so that the power supply controller 14 is in a power-on working state. When the negative terminal En of the first control signal Sc1 is connected to the negative terminal of the bus Bn and the negative terminal Bn of the bus is grounded to leave the state of entering the transient phase, the first control loop 24 provides the invalidation of the first control loop according to the first control signal Sc1 The signal Sn1 is sent to the path control circuit 22 . And, when the first control signal Sc1 corresponds to the state where the negative terminal En is separated from the bus negative terminal Bn, the first control loop 24 provides the first control loop invalid signal Sn1 to the path control circuit 22 according to the first control signal Sc1. Therefore, when the first control loop 24 provides the first The control loop effective signal Se1, and the second control loop 26 provides the second control loop invalid signal Sn2, so that the path control circuit 22 conducts the electrical coupling relationship between the power supply terminal 1-1 and the bus positive pole Bp, and the power supply controller 14 is powered on. state, but still in the stage of no power supply. When the first control loop 24 provides the first control loop invalid signal Sn1, and the second control loop 26 provides the second control loop valid signal Se2, so that the path control circuit 22 conducts the electrical coupling relationship between the power supply terminal 1-1 and the bus positive pole Bp, And the power supply controller 14 is in the power-on working state, and at the same time it is in the power supply stage. And, when the first control loop 24 provides the first control loop invalid signal Sn1, and the second control loop 26 provides the second control loop invalid signal Sn2, the path control circuit 22 turns off the electrical coupling between the power supply terminal 1-1 and the bus positive pole Bp. connection relationship, and the power supply controller 14 enters the power-off stop working state.

Specifically, when the load device 200 is connected to the bus negative pole Bn of the Ethernet power supply 100, the Ethernet power supply 100 and the load device 200 will generate the first terminal 100-1, the bus positive pole Bp 1. In the transient phase of connecting the load device 200 to the bus negative pole Bn loop, the terminal voltage Vc of the bus negative pole Bn is increased, thus. The first control loop 24 is connected to the transient phase according to the load device 200 , and the terminal voltage Vc of the bus negative pole Bn increases to provide the first control loop effective signal Se1 to the path control circuit 22 . At the same time, since the power supply controller 14 is still in a power-off state and stops working, the second control loop 26 provides the second control loop invalid signal Sn2 to the path control circuit 22 . Next, the path control circuit 22 is turned on according to the first control loop effective signal Se1, so as to be electrically coupled to the bus positive terminal Bp at the power terminal 1-1. At the same time, the power supply controller 14 receives the power supply voltage Vcc (or DC voltage Vdc) through the path control circuit 22 and is in the power-on working state, and the second pin Ec2 of the power supply controller 14 starts to provide the third control signal Sc3 and the load device 200 tries to communicate to determine whether the load device 200 is a valid load or an invalid load.

As mentioned above, when the power supply controller 14 handshakes communication with the load device 200 through the third control signal Sc3 and determines that the load device 200 is an effective load, the power supply controller 14 provides the second control signal Sc2 (such as but not limited to a high potential signal ) to the communication module 16, so as to control the communication module 16 to ground the bus negative pole Bn to be in the power supply stage. In the stage of power supply, the electric controller 14 also provides the second control signal Sc2 to the second control loop 26, and after the bus negative pole Bn is grounded, the DC voltage Vdc can be provided to the load device 200 through the bus positive pole Bp and the bus negative pole Bn to supply The power required by the load device 200 . At this time, since the bus negative electrode Bn is grounded and enters the power supply phase from the access transient phase, the first control loop 24 provides the first control loop invalid signal Sn1 to the path control circuit 22 according to the power supply phase. The second control loop 26 provides the second control loop effective signal Se2 to the path control circuit 22 according to the second control signal Sc2 provided by the second pin Ec2, so that the path control circuit 22 can control the path according to the second control loop effective signal Se2. continuous conduction.

Further, the above-mentioned communication module 16 can be constituted by, for example but not limited to, a switch SWc, and the power supply controller 14 can transmit the third control signal Sc3 to the After the communication of the bus negative pole Bn is completed, the first pin Ec1 of the communication terminal Ec of the power supply controller 14 provides the second control signal Sc2 to turn on the switch SWc, so that the bus negative pole Bn is grounded through the switch SWc. That is, the second control signal Sc2 can be a high potential signal, and the signal potential is sufficient to turn on the switch SWc. In addition, when the load device 200 is removed from the Ethernet power supply 100, the first pin Ec1 of the communication terminal Ec provides the fourth control signal Sc4 to turn off the switch SWc, so that the negative pole Bn of the bus returns to the one that has not been connected to the load device 200. state.

Please refer to FIG. 3A which is a circuit block diagram of the first embodiment of the second control module of the present invention, and FIG. 3B is a circuit block diagram of the second embodiment of the second control module of the present invention. Refer to FIGS. 1-2 for complex coordination. In FIG. 3A, the first control loop 24 and the second control loop 26 can be electric circuits with a function of comparing potentials. road. Taking the circuit formed by the comparator as an example, the first control loop 24 can be coupled to the first reference voltage Vref1 , and the second control loop 26 can be coupled to the second reference voltage Vref2 . The first control loop 24 compares the signal provided by the bus negative pole Bn with the first reference voltage Vref1, and provides the first control loop effective signal Se1 according to the comparison result, so that the first control loop 24 provides the first control loop effective signal Se1 to control the conduction path Circuit 22. And, the second control loop 26 compares the signal provided by the first pin Ec1 with the second reference voltage Vref2, and provides the second control loop effective signal Se2 according to the comparison result, so that the second control loop 26 provides the second control loop effective signal Se2 turns on the path control circuit 22 . Wherein, when the signal potential provided by the bus negative pole Bn is higher than the first reference voltage Vref1, the first control loop 24 provides the first control loop effective signal Se1 to conduct the path control circuit 22, and when the signal potential provided by the first pin Ec1 is high At the second reference voltage Vref2 , the second control loop 26 provides the second control loop effective signal Se2 to conduct the path control circuit 22 .

In addition, the first control loop 24 can further compare the first control signal Sc1 corresponding to the bus negative Bn terminal voltage Vc with the first reference voltage Vref1 to provide the first control loop effective signal Se1. And, the second control loop 26 can further compare the second control signal Sc2 provided by the first pin Ec1 with the second reference voltage Vref2 to provide the second control loop effective signal Se2.

Moreover, the first control loop 24 can further compare the first control signal Sc1 corresponding to the bus negative terminal Bn terminal voltage Vc higher than the first reference voltage Vref1 to provide the first control loop effective signal Se1, and the first control signal Sc1 When the first reference voltage Vref1 is lower than the first control loop invalid signal Sn1 is provided. And, the second control loop 26 can further compare the second control signal Sc2 provided by the first pin Ec1 higher than the second reference voltage Vref2 to provide the second control loop valid signal Se2, and the second control signal Sc2 is lower than the second reference voltage Vref2. The voltage Vref2 sometimes provides the second control loop invalid signal Sn2.

In the aforementioned first embodiment, when the potential of the second control signal Sc2 provided by the first pin Ec1 or when the second control signal Sc2 is not provided is lower than the second reference voltage Vref2, the second control loop provides the second control Loop invalid signal Sn2.

In the aforementioned first embodiment, when the potential of the second control signal Sc2 provided by the first pin Ec1 is lower than the second reference voltage Vref2 , the second control loop provides the second control loop invalid signal Sn2 .

In the above-mentioned first embodiment, the path control circuit 22 includes a path switch 222, which may be composed of, for example but not limited to, components with switching functions such as MOSFET transistors and electronic components (such as resistors, capacitors, etc.). Taking a transistor as an example, one end of the path switch 222 is coupled to the bus anode Bp, and the other end is coupled to the power terminal 1 - 1 . The control terminal of the path switch 222 is coupled to the first control loop 24 and the second control loop 26 to control the path switch 222 to be turned on or off through signals provided by the first control loop 24 and the second control loop 26 . When one of the first control loop 24 and the second control loop 26 provides a valid signal, the path switch 222 is turned on, and when both the first control loop 24 and the second control loop 26 provide an invalid signal, the path switch 222 is turned off. broken.

In FIG. 3B , the first control loop 24 and the second control loop 26 can be, for example but not limited to, switching circuits composed of components with switching functions such as MOSFET transistors and electronic components (such as resistors, capacitors, etc.). The first control loop 24 may be a switching circuit composed of a first switching element SW1, and the second control loop 26 may also be a switching circuit composed of a second switching element SW2, wherein the first switching element SW1 and the second switching element SW2 may be For example, but not limited to, components with switching functions such as MOSFET transistors. When the first control circuit 24 receives the first control signal Sc1 provided by the line negative Bn, the first switch element SW1 correspondingly provides the first control circuit valid signal Se1 to turn on the path control circuit 22 to generate the power terminal 1-1 and The electrical coupling relationship between the positive poles of the bus Bp. when the second control When the control loop 26 receives the second control signal Sc2, the second switch element SW2 correspondingly provides the second control loop effective signal Se2 to turn on the path control circuit 22, so as to generate electrical coupling between the power supply terminal 1-1 and the bus positive pole Bp relation.

In the aforementioned embodiment, in the implementation where the first switch element SW1 and the second switch element SW2 are transistors, the first switch can be driven according to the first control signal Sc1 corresponding to the terminal voltage Vc and through the first control signal Sc1 The control terminal of the element SW1 turns on or off the first switch element SW1, and the first control loop 24 provides a first control loop valid signal Se1 or a first control loop invalid signal Sn1 according to the first switch element SW1 being turned on or off. And, according to the second control signal Sc2 provided by the first pin Ec1, the control terminal of the second switch element SW2 can be driven to turn on or off the second switch element SW2, and the second control loop 26 can be turned on or off according to the second switch element SW2. Turn off and correspondingly provide the second control loop valid signal Se2 or the second control loop invalid signal Sn2.

In addition, the control end of the second switching element SW2 can be further driven according to the second control signal Sc2 and the fourth control signal Sc4 provided by the first pin Ec1, and the second switching element SW2 is turned on and off correspondingly, so that the first The second control loop 26 provides the second control loop effective signal Se2 according to the second control signal Sc2, and the second control loop 26 provides the second control loop invalid signal Sn2 according to the fourth control signal Sc4.

In the aforementioned embodiments, when the first control loop 24 provides the first control loop effective signal Se1 or the second control loop 26 provides the second control loop effective signal Se2, the path switch 222 is turned on to generate the power supply terminal 1-1 and the bus positive pole. The electrical coupling relationship between Bp, and when the first control loop 24 provides the first control loop invalid signal Sn1 and the second control loop 26 provides the second control loop invalid signal Sn2, the path switch 222 is turned off.

In the above-mentioned embodiment, the first control loop 24 can be turned on according to the first control signal Sc1 corresponding to the increase of the voltage Vc at the negative bus terminal Bn.

It is worth mentioning that in an embodiment of the present invention, the path control circuit 22 further includes a driving switch 224 . One terminal of the driving switch 224 is coupled to the control terminal of the path switch 222 , and the control terminal of the driving switch 224 is coupled to the first control loop 24 and the second control loop 26 . The driving switch 224 is used to drive the path switch 222 to be turned on or off. Specifically, since the DC voltage Vdc received by the first terminal 100-1 can be a high voltage of 48V~55V, the transistor of the path switch 222 needs to use a p-MOSFET to withstand the DC voltage Vdc, so as to avoid the voltage breakdown of the transistor. Insufficient (the price will be too expensive if a compliant n-MOSFET is used). Therefore, the path switch 222 must be driven by the drive switch 224 so that the path switch 222 can smoothly connect the first terminal 100 - 1 and the power supply terminal 1 - 1 of the voltage stabilizing energy storage module 12 . However, if the DC voltage Vdc is not high or there is a qualified n-MOSFET transistor, the driving switch 224 can be omitted. Furthermore, if the DC voltage Vdc is above a specific voltage (such as but not limited to 30V), then it is preferable to use the two switches 222 and 224 in FIG. 3B as the switch unit 22 to be more resistant to the DC voltage Vdc . On the contrary, below a certain voltage, the single switch 222 of FIG. 3A can be used as the switch unit 22 .

Please refer to FIG. 4 which is a circuit block diagram of the third embodiment of the second control module of the present invention, and refer to FIG. 3B for the combination. In the third embodiment of the present invention, the path control circuit 22 further constitutes a self-locking circuit, and when the first control loop 24 provides the first control loop effective signal Se1, the path control circuit 22 is turned on to the power terminal 1-1 When the path control circuit 22 maintains the conduction state, when the first control loop 24 stops providing the first control loop effective signal Se1, the path control circuit 22 maintains the conduction state. And, when the path control circuit 22 maintains the on state and the first control loop 24 stops providing the first control loop effective signal Se1, when the second control loop 26 When the second control loop invalid signal Sn2 is provided, the path control circuit 22 shuts off the electrical coupling relationship between the power terminal 1 - 1 and the bus positive terminal Bp.

To further illustrate, the first control loop 24 provides the first control loop effective signal Se1, so that the trigger path control circuit 22 enters the conduction state from the off state, and when the path control circuit 22 is in the conduction state, the first control loop 24 stops or Providing the first control loop effective signal Se1 intermittently will not change the conduction state of the path control circuit 22 . And, the second control loop 26 provides the second control loop invalid signal Sn2 to make the trigger path control circuit 22 turn from the on state to the off state.

In the path switch 222 and the drive switch 224 of the aforementioned path control circuit 22, the drive switch 224 can further be one end coupled to the control end of the path switch 222, and the control end of the drive switch 224 is coupled to the first control circuit 24, the second control circuit The loop 26 and the path switch 222 enable the first control loop 24 and the path switch 222 to drive the drive switch 224 to be turned on, the second control loop 26 is used to drive the drive switch 224 to turn off, and the drive switch 224 is further used to drive the path switch 222 on or off. Therefore, when the first control loop 24 provides the first control loop effective signal Se1 to drive the drive switch 224 to conduct, the drive switch 224 is further used to drive the path switch 222 to conduct, so that the path control circuit 22 conducts the power terminal 1-1 and the bus positive pole. The electrical coupling relationship between Bp, and when the path control circuit 22 maintains the conduction state, when the first control loop 24 stops providing the first control loop effective signal Se1, the path switch 222 that has been turned on is further used to drive the drive switch 224 to turn on , so that the path switch 222 and the driving switch 224 are continuously driven to conduct each other, and the locking path control circuit 22 is maintained in the conduction state, so that the path control circuit 22 also maintains the electrical coupling relationship between the power supply terminal 1-1 and the bus positive pole Bp . And, when the path control circuit 22 maintains the on state and the first control loop 24 stops providing the first control loop effective signal Se1, when the second control loop 26 provides the second control loop invalid signal Sn2 to turn off the driving switch 224 , turning off the drive switch 224 also further turns off the path control circuit 22 , and finally makes the path control circuit 22 turn off the electrical coupling relationship between the power supply terminal 1 - 1 and the bus positive pole Bp.

Please refer to FIG. 5 , which is a flow chart of the power-saving control method of the Ethernet power supply of the present invention, and refer to FIGS. 1-4 for complex cooperation. The power saving control method of the present invention is mainly used to control the first control module 1 to be powered off and stop working when the load device 200 is not connected to the Ethernet power supply 100, so as to save the Ethernet network. Power consumption of the power supply 100 . Therefore, the power saving control method includes: detecting whether the load device is connected or not, and turning on or off the path control circuit between the power terminal of the first control module and the positive pole of the bus ( S100 ). The Ethernet power supply 100 detects whether the load device 200 is connected to determine whether to enable the first control module 1 to operate. When the load device 200 is not connected to the Ethernet power supply 100, the second control module 2 controls the first control module 1 to power off and is in a state of stopping work, and when the load device 200 is connected to the Ethernet network When the power supply 100 is used, the second control module 2 controls the first control module 1 to be powered on to be in a working state. Then, the path control circuit is turned on through the first control loop according to the connection of the negative terminal to the negative pole of the bus (S200). A preferred embodiment is that the first control loop 24 provides the first control loop effective signal Se1 to the path control circuit 22 according to the terminal voltage Vc of the negative bus Bn rising during the transient phase when the load device 200 is connected. The path control circuit 22 is turned on according to the effective signal Se1 of the first control loop, so as to be electrically coupled to the positive terminal Bp of the first terminal bus at the power terminal 1 - 1 .

Then, according to the negative pole of the bus being grounded, the path control circuit is switched on through the second control loop ( S300 ). A preferred embodiment is that when the negative terminal Bn of the bus is grounded and the negative terminal En is connected to the negative terminal Bn of the bus during the transient phase, the DC voltage Vdc can be provided to the load device 200 through the positive bus Bp and the negative bus Bn, so as to control the load device 200 powered by. At this time, since the bus negative pole Bn is grounded, the second control loop 26 provides the second control loop effective signal Se2 to the path control circuit 22 according to the second control signal Sc2 provided by the first pin Ec1 of the communication terminal Ec. Path control circuit 22 according to the second control The effective signal Se2 of the control loop is continuously turned on. Finally, the path control circuit is turned off according to the negative terminal being pulled away from the negative terminal of the bus (S400). In a preferred implementation manner, when the load device 200 is disconnected from the Ethernet power supply 100 , the terminal voltage Vc of the negative bus Bn will change. The power supply controller 14 provides the fourth control signal Sc4 to the communication module 16 according to the potential change of the terminal voltage Vc of the negative bus Bn. The first control loop 24 provides the first control loop invalid signal Sn1 to the path control circuit 22 according to the potential change of the terminal voltage Vc of the negative bus Bn. The second control loop 26 provides the second control loop invalid signal Sn2 to the path control circuit 22 according to the fourth control signal Sc4. The path control circuit 22 turns off the path control circuit 22 according to the first control loop deactivation signal Sn1 and the second control loop deactivation signal Sn2.

It is worth mentioning that in the above-mentioned embodiments, the specific circuit elements and their coupling relationships contained in each circuit are not limited. For example, any circuit, controller (with internal software control) and other implementation modes that can achieve the above-mentioned functions can be used. Should be included in the category of this embodiment. In addition, in an embodiment of the present invention, the detailed flow of the above steps can refer to the content described in FIG. 2 , and will not be repeated here.

However, the above description is only a detailed description and drawings of preferred embodiments of the present invention, but the features of the present invention are not limited thereto, and are not intended to limit the present invention. The entire scope of the present invention should be applied for as follows The scope of the patent shall prevail, and all embodiments that conform to the spirit of the patent scope of the present invention and its similar changes shall be included in the scope of the present invention, and any person familiar with the art can easily think of it in the field of the present invention Changes or modifications can be covered by the scope of the following patents in this case.

L: power cord

100:Ethernet power supply

100-1: first end

100-2: second end

100-3: the third end

Bp: bus positive

Bn: bus negative

1: The first control module

2: The second control module

3: Data conversion module

200: load equipment

200-1: Device interface

Ep: Positive extreme

En: Negative extreme

300: external device

Po: output power

Vdc: DC voltage

Sh: first control signal

So: external signal

Claims (22)

An Ethernet network power supply is coupled to a positive terminal and a negative terminal of a load device through a bus positive terminal and a bus negative terminal and receives a DC voltage. The Ethernet network power supply includes: a first control A module, including a power supply terminal, and the other terminal is coupled to the negative pole of the bus and used to control the power supplied by the Ethernet power supply to the load device; and a second control module, coupled to the first control module . The positive pole of the bus and the negative pole of the bus, including: a path control circuit, used to turn on or off the coupling relationship between the power supply terminal and the positive pole of the bus; a first control loop, coupled to the negative pole of the bus and the path control circuit circuit, and is used to provide a first control signal to turn on the path control circuit according to the access transient phase when the negative terminal is connected to the negative pole of the bus; and a second control loop, coupled to the first control module and the a path control circuit, and is used to turn on the path control circuit according to a second control signal provided by the first control module; wherein, the negative pole of the bus provides the first Control signal; the first control module provides the second control signal; the second control module is used to turn off the path control circuit according to the negative terminal being separated from the bus negative pole; and the first control module It is used to be in the power-on working state according to the conduction of the path control circuit, and is used to be in the power-off stop working state according to the shutdown of the path control circuit. The Ethernet power supply as described in claim item 1, wherein the first control module is in the power-on working state and grounds the negative pole of the bus, and is out of the access transient phase, so as to pass the positive pole of the bus to the bus The negative electrode provides the DC voltage to the load device. The Ethernet power supply as described in claim item 2, wherein the first control module provides the second control signal and grounds the negative electrode of the bus when confirming that the load device is a valid load, and confirms that the load device is A fourth control signal is provided to turn off the negative pole of the bus and ground the negative pole of the bus for invalid load. The Ethernet power supply as described in claim 3, wherein the first control signal is a terminal voltage of the negative pole of the bus, and the first control loop compares the first control signal with a first reference voltage, and according to The comparison result of the first control signal and the first reference voltage corresponds to the negative terminal being inserted into the negative state of the bus to turn on the path control circuit; and the second control loop compares the second control signal and a second reference voltage, and According to the comparison result between the second control signal and the second reference voltage, the path control circuit is turned on corresponding to the load device being in a valid load state. The Ethernet power supply as described in claim item 4, wherein the first control module provides the fourth control signal and interrupts the negative pole of the bus to ground when confirming that the load device is invalid; the second control loop compares The fourth control signal and the second reference voltage; and according to the comparison result between the first control signal and the first reference voltage, the negative terminal is drawn from the bus negative state, and the fourth control signal and the second reference The voltage comparison result corresponds to the invalid load state of the load device, and the second control module turns off the path control circuit. The Ethernet power supply as described in claim 3, wherein the second control loop compares the second control signal with a second reference voltage, and according to the comparison result between the second control signal and the second reference voltage The path control circuit is turned on corresponding to the load device being in a valid load state. The Ethernet power supply as described in claim 6, wherein the first control module provides the fourth control signal and interrupts the bus negative terminal to ground when confirming that the load device is invalid; and the second control loop comparing the fourth control signal with a second reference voltage, and the fourth control signal The comparison result of the signal and the second reference voltage is corresponding to the invalid load state of the load device and the path control circuit is turned off. The Ethernet power supply as described in claim 3, wherein the first control loop is a switching circuit composed of a first switching element; the first control signal is a terminal voltage of the negative pole of the bus, and the first control signal is a terminal voltage of the bus negative pole. A switch element is turned on according to the first control signal in the transient state of the load device, and the second control module turns on the path control circuit according to the turn-on of the first switch element. The Ethernet power supply as described in claim 3, wherein the second control loop includes a switching circuit composed of a second switching element; the second switching element is turned on when receiving the second control signal, and the The second control module turns on the path control circuit according to the conduction of the second switch element. The Ethernet power supply as described in claim item 9, wherein the first control module provides the fourth control signal when confirming that the load device is invalid, and the first control module interrupts the negative terminal of the bus to ground ; the second switch element is turned off upon receiving the fourth control signal; group turns off the path control circuit. The Ethernet power supply as described in claim 3, wherein the first control module includes: a power supply controller, coupled to the path control circuit and the second control module, and used to control the path according to the path The circuit is turned on to receive the DC voltage, so as to provide the second control signal in the power-on working state; and a communication module, which is coupled to the power supply controller and the negative pole of the bus, and transmits a third control signal to the bus The negative pole carries out the handshake mechanism. The Ethernet power supply as described in claim item 11, wherein the power supply controller transmits the third control signal to the negative pole of the bus through the communication module to perform a handshake mechanism and is used to confirm that it is provided for the payload The second control signal controls the communication module to ground the negative pole of the bus, and is used to provide the fourth control signal for confirming that the load device is in an invalid load state or that the negative terminal is separated from the negative pole state of the bus. The Ethernet power supply as described in claim 12, wherein the first control signal is a terminal voltage of the negative pole of the bus, and according to the first control signal, the negative terminal is inserted into the negative pole state of the bus to turn on the Path control circuit; wherein, the first control loop corresponds to the access transient phase of the bus negative terminal according to the negative terminal according to the first control signal, and the second control loop is based on the second control signal Corresponding to the load device being in a valid load state, the second control module turns on the path control circuit; and the first control loop is correspondingly separated from the access transient phase or the negative terminal is withdrawn from the bus negative terminal according to the first control signal state, and the second control loop corresponds to the invalid load state of the load device according to the fourth control signal, and the second control module turns off the path control circuit. The Ethernet power supply as described in claim 3, wherein the path control circuit includes: a path switch, one end of which is coupled to the positive pole of the bus and the other end is coupled to the power supply end; and a driving switch, one end of which is coupled to the a path switch control terminal, and the driving switch control terminal is coupled to the first control loop and the second control loop; wherein, the first control loop and the second control loop are used to drive the path switch to be turned on or off, and The drive switch is used to drive the path switch to turn on or off; the first control loop is based on the first control signal corresponding to the transient phase when the negative terminal is connected to the negative pole of the bus or the second control loop is based on the second control loop. Two control signals to conduct the drive switch, and the drive switch in the conduction state drives the path switch to conduct, and further conducts the coupling relationship between the power supply end and the positive pole of the bus; and the first control in the second control module The loop and the second control loop are used to turn off the drive switch according to the negative terminal being pulled away from the negative pole of the bus, and the drive switch in the off state drives the path switch to turn off, and further shuts off the power supply terminal and the Coupling relationship of bus positive pole. An Ethernet network power supply is coupled to a positive terminal and a negative terminal of a load device through a bus positive terminal and a bus negative terminal and receives a DC voltage. The Ethernet network power supply includes: a first control A module, including a power supply terminal, and the other terminal is coupled to the negative pole of the bus and used to control the power supplied by the Ethernet power supply to the load device; and a second control module, coupled to the first control module . The positive pole of the bus and the negative pole of the bus, including: a path control circuit, used to turn on or off the coupling relationship between the power supply terminal and the positive pole of the bus; a first control loop, coupled to the negative pole of the bus and the path control circuit circuit, and is used to provide a first control loop effective signal to trigger the path control circuit to enter the conduction state from the off state according to the negative terminal connected to the bus negative pole, and the first control module is correspondingly in the power-on working state; and a second control loop, which is coupled to the first control module and the path control circuit, and is used to provide a second control loop invalid signal to trigger the path control circuit to turn on according to the negative terminal being separated from the negative pole of the bus Enter the shutdown state, and the first control module is corresponding to the power-off state; wherein, when the first control module is corresponding to the power-on working state, the first control module is separated from the negative terminal of the bus according to the negative terminal Make the second control loop provide the second control loop invalid signal. The Ethernet power supply as described in claim 15, wherein the path control circuit includes: a path switch, one end of which is coupled to the positive pole of the bus and the other end is coupled to the power supply end; and a drive switch, one end of which is coupled to the path switch control end, and the drive switch control end is coupled to the first control loop, the second The control loop and the path switch; wherein, the effective signal of the first control loop triggers the drive switch to be in the conduction state, so that the drive switch drives the path switch to be in the conduction state, and the drive switch is maintained in conduction according to the path switch in the conduction state State, the path control circuit correspondingly maintains the coupling relationship between the power supply terminal and the positive pole of the bus; and the second control loop invalid signal triggers the drive switch to be in the off state, so that the drive switch drives the path switch to be in the off state , and maintain the drive switch in the off state according to the path switch in the off state, and the path control circuit correspondingly maintains off the coupling relationship between the power supply end and the positive pole of the bus. A power-saving control method for an Ethernet power supply. The Ethernet power supply receives a DC voltage and is coupled to a positive terminal and a negative terminal of a load device; the Ethernet power supply Including a first control module, and the first control module receives the DC voltage through a bus positive pole and a bus negative pole, and couples the negative terminal through the bus negative pole to provide a first control signal through the bus negative pole Confirming whether the load device is an effective load; the power saving control method includes the following steps: detecting whether the load device is connected or not, and turning on or off the connection between a power supply terminal of the first control module and the positive pole of the bus A path control circuit; according to the negative terminal connected to the negative pole of the bus, the path control circuit is turned on through a first control loop; according to the negative pole of the bus is grounded, the path control circuit is turned on through a second control loop; and according to The negative terminal is pulled away from the negative terminal of the bus to turn off the path control circuit. The power-saving control method as described in claim 17 further includes the following steps: The first control loop provides a valid signal of the first control loop according to the boost of a terminal voltage of the bus negative pole; the second control loop provides a second control loop according to the state that the first control module is powered off and stops working control loop invalid signal; and conducting the path control circuit according to the first control loop valid signal and the second control loop invalid signal. The power-saving control method according to claim 18, wherein the first control module is in a power-on and working state according to the conduction of the path control circuit, and confirms whether the load device is the effective load by providing the first control signal . The power-saving control method as described in claim 18, wherein the first control module provides a second control signal to ground the negative electrode of the bus after the communication is completed, and the power-saving control method further includes the following steps: the first control The loop provides a first control loop invalid signal according to the bus negative ground; the second control loop provides a second control loop valid signal according to the second control signal; and according to the first control loop invalid signal and the second The valid signal of the control loop turns on the path control circuit. The power saving control method as described in claim item 18, wherein the first control module provides a fourth control signal according to the negative terminal being separated from the negative pole of the bus, and the power saving control method further includes the following steps: the first The control loop provides a first control loop invalid signal according to the terminal voltage of the negative electrode of the bus being at the first potential; the second control loop provides a second control loop invalid signal according to the fourth control signal; and The path control circuit is turned off according to the first control loop invalid signal and the second control loop invalid signal. The power-saving control method as described in claim 18, wherein the first control module confirms that the load device is not for the effective load and provides a second control signal to ground the negative pole of the bus, and controls the Ethernet power supply Provide a default power to the load device.

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