Standby wake-up circuit, control method and device, circuit board and electronic equipment

Abstract

The invention discloses a standby wake-up circuit, a control method and device, a circuit board and electronic equipment, the standby wake-up circuit is applied to a slave side of a current loop communication circuit, and a host side of the current loop communication circuit is connected with the slave side of the current loop communication circuit through a zero line and a signal line; the standby wake-up circuit comprises a bridgeless PFC module; the main control unit is connected with the bridgeless PFC module; the first power supply conversion module is respectively connected with the bridgeless PFC module and the main control unit; the second power supply conversion module is respectively connected with the zero line, the signal line and the main control unit, and is used for receiving the wake-up voltage of the host side of the current loop communication circuit, converting the wake-up voltage and outputting the converted wake-up voltage to the main control unit to wake up the main control unit, so that the main control unit controls the bridgeless PFC module to utilize the main power supply to power on the main control unit. Therefore, the main control unit in the standby mode can be awakened with low power consumption.

Description

Technical Field

[0001] The present invention relates to the technical field of electronic circuits, and in particular to a standby wake-up circuit, a control method, a device, a circuit board and an electronic device. Background Art

[0002] For devices powered by external power, such as microcontrollers, when the external power supply to the microcontroller is cut off and the microcontroller is shut down, if the microcontroller needs to be woken up again, an additional device is usually required. For example, some devices use power switching devices to implement power factor correction (PFC). The bridgeless PFC circuit with the function of correcting the power of the PFC (PFC) supplies power to the control chip. Since the bridgeless PFC circuit must rely on the control chip to control the corresponding power switch device to realize the current rectification process, when the control chip is powered off and enters the standby mode, the power switch device in the bridgeless PFC circuit cannot be controlled to supply power to the control chip before the control chip is powered on, resulting in the bridgeless PFC circuit being unable to wake up the control chip, and then causing the bridgeless PFC circuit to fail to work properly. In the related art, an auxiliary power supply circuit needs to be additionally set for the bridgeless PFC circuit to supply power to the control chip separately. Therefore, even when the control chip is in the standby mode, the auxiliary power supply circuit is still in the power-on working state, which makes it difficult to reduce the power consumption of the circuit. Moreover, for some multi-connected systems, when the host uses the additional auxiliary power supply circuit to wake up the slave, it is also necessary to add a wiring harness and an interface between the host and the slave, which is inconvenient to use and has a high modification cost. Therefore, how to realize the low-power wake-up of the control chip in the standby mode has become an urgent problem to be solved. Summary of the invention

[0003] The purpose of the present invention is to solve at least one of the technical problems existing in the prior art, and to provide a standby wake-up circuit, a control method, a device, a circuit board and an electronic device, which do not require adding a wiring harness and an interface between the host and the slave, and can easily realize low-power waking up of the main control unit in standby mode.

[0004] In a first aspect, an embodiment of the present invention provides a standby wake-up circuit, which is applied to a slave side of a current loop communication circuit, wherein the host side of the current loop communication circuit is connected to the slave side of the current loop communication circuit through a neutral line and a signal line respectively; the standby wake-up circuit comprises:

[0005] Bridgeless PFC module for access to the main power supply;

[0006] A main control unit connected to the bridgeless PFC module, the main control unit being used to control the bridgeless PFC module;

[0007] A first power conversion module, connected to the bridgeless PFC module and the main control unit respectively, the first power conversion module is used to convert the voltage output by the bridgeless PFC module and supply power to the main control unit;

[0008] A second power conversion module is respectively connected to the neutral line, the signal line and the main control unit. The second power conversion module is used to receive the wake-up voltage on the host side of the current loop communication circuit, and convert the wake-up voltage and output it to the main control unit to wake up the main control unit, so that the main control unit controls the bridgeless PFC module to power on the main control unit using the main power supply.

[0009] The standby wake-up circuit provided according to the embodiment of the present invention has at least the following beneficial effects: when the host needs to drive the main control unit, since the main control unit cannot control the normal operation of the bridgeless PFC module in the power-off state, the main power cannot pass through the bridgeless PFC module, and thus cannot wake up the main control unit. Therefore, the current loop communication circuit between the host and the slave can be utilized, and the neutral line and the signal line of the current loop communication circuit are respectively connected to the second power conversion module, so that the second power conversion module can receive the wake-up voltage provided by the host side through the current loop communication circuit, and after voltage conversion by the second power conversion module, the converted wake-up voltage is output to the main control unit, thereby being able to wake up the main control unit. Therefore, when the standby wake-up circuit is completely powered off, the current loop communication circuit can be reused to provide a wake-up voltage from the host side to the slave side, so that the main control unit can be awakened. Compared with the related art of additionally setting an auxiliary power supply circuit between the host and the slave to power the control chip separately, the standby wake-up circuit provided by the embodiment of the present invention does not require a new wiring harness and interface between the host and the slave, and utilizes the current loop communication circuit for communication between the host and the slave to improve the convenience of the circuit. At the same time, when the main control unit needs to be in a standby dormant state, the standby wake-up circuit can be completely powered off without maintaining the auxiliary power supply circuit in a powered working state. The standby wake-up circuit has no power loss, and can reduce the power loss of the main control unit in the wake-up standby mode.

[0010] In the standby wake-up circuit provided in an embodiment of the present invention, the second power conversion module includes a wake-up control chip for controlling the wake-up of the main control unit, and a power-on detection circuit for detecting the power-on status of the main control unit, the wake-up control chip includes an enable port, a power supply port, a ground port and an output port, the enable port is connected to the power-on detection circuit, the neutral line is connected to the power supply port, the signal line is connected to the ground port, and the output port is connected to the main control unit.

[0011] In the standby wake-up circuit provided in an embodiment of the present invention, the power-on detection circuit includes a first switch component, and the enable port, the power port and the signal control port of the main control unit are respectively connected to the first switch component, so that the main control unit can control the level state of the enable port by controlling the conduction state of the first switch component when powered on.

[0012] In the standby wake-up circuit provided in an embodiment of the present invention, the first switch component includes a first switch tube and the first photocoupler, the power port and the first end of the first switch tube are respectively connected to the light source of the first photocoupler, the second end of the first switch tube is connected to the signal control port, the third end of the first switch tube is grounded, and the light receiver of the first photocoupler is connected to the enable port.

[0013] In the standby wake-up circuit provided in the embodiment of the present invention, the neutral line is connected to the input end of the light receiver, the signal line is connected to the output end of the light receiver, and the enable port is connected to the connection point between the neutral line and the input end of the light receiver.

[0014] In the standby wake-up circuit provided in an embodiment of the present invention, the second power conversion module also includes an isolation transformer and a half-wave rectifier circuit, the output port is connected to the primary side of the isolation transformer, and the half-wave rectifier circuit is respectively connected to the main control unit and the secondary side of the isolation transformer.

[0015] In the standby wake-up circuit provided in an embodiment of the present invention, the wake-up control chip further includes a feedback port, the second power conversion module further includes a feedback module, and the feedback port is connected to the primary side of the isolation transformer through the feedback module.

[0016] In the standby wake-up circuit provided in an embodiment of the present invention, the feedback module includes a first feedback capacitor, a first feedback resistor and a second feedback resistor, the feedback port is connected to the primary side of the isolation transformer through the first feedback resistor, the first feedback capacitor and the second feedback resistor are respectively connected to the connection point between the feedback port and the first feedback resistor, and the first feedback capacitor and the second feedback resistor are both grounded.

[0017] In the standby wake-up circuit provided in the embodiment of the present invention, the standby wake-up circuit further includes a voltage stabilizing module, and the first power conversion module and the second power conversion module are respectively connected to the main control unit through the voltage stabilizing module.

[0018] In a second aspect, an embodiment of the present invention provides a control method for a standby wake-up circuit, which is applied to a host side of a current loop communication circuit, wherein the host side of the current loop communication circuit is connected to a second power conversion module in the standby wake-up circuit as described in the embodiment of the first aspect through the neutral line and the signal line, respectively, and the control method includes:

[0019] The wake-up voltage is output to the second power conversion module through the neutral line and the signal line, so that the second power conversion module performs voltage conversion on the wake-up voltage and outputs the wake-up voltage after voltage conversion to the main control unit.

[0020] According to the control method of the standby wake-up circuit provided by the embodiment of the present invention, there are at least the following beneficial effects: when the standby wake-up circuit is completely powered off, the host side provides the wake-up voltage to the second power conversion module through the neutral line and the signal line of the current loop communication circuit, so that the second power conversion module can convert the wake-up voltage and output the converted wake-up voltage to the main control unit, thereby waking up the main control unit. After the main control unit wakes up, the bridgeless PFC module can be controlled so that the main power is transmitted to the first power conversion module through the bridgeless PFC module, and then the main power is supplied to the main control unit after the voltage conversion of the main power by the first power conversion module, thereby completing the power-on operation of the main control unit. Therefore, when the standby wake-up circuit is completely powered off, the communication circuit between the host and the slave, that is, the current loop communication circuit, can be used to provide power to the second power conversion module of the standby wake-up circuit on the slave side, thereby waking up the main control unit on the slave side, without maintaining the auxiliary power circuit in the powered-on working state, realizing the standby wake-up circuit without power loss, and reducing the power loss of the main control unit in the wake-up standby mode, while no additional wiring harness and interface between the host and the slave are required, thereby improving the utilization rate of the circuit.

[0021] In a third aspect, an embodiment of the present invention provides an operation control device, comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the program to implement the control method as described in the embodiment of the second aspect above.

[0022] According to the operation control device provided by the embodiment of the present invention, there are at least the following beneficial effects: when the standby wake-up circuit is completely powered off, the host side provides the wake-up voltage to the second power conversion module through the neutral line and the signal line of the current loop communication circuit, so that the second power conversion module can convert the wake-up voltage and output the converted wake-up voltage to the main control unit, thereby waking up the main control unit. After the main control unit wakes up, the bridgeless PFC module can be controlled so that the main power is transmitted to the first power conversion module through the bridgeless PFC module, and then the main power is supplied to the main control unit after the voltage conversion of the main power by the first power conversion module, thereby completing the power-on operation of the main control unit. Therefore, when the standby wake-up circuit is completely powered off, the communication circuit between the host and the slave, that is, the current loop communication circuit, can be used to provide power to the second power conversion module of the standby wake-up circuit on the slave side, thereby waking up the main control unit on the slave side, without maintaining the auxiliary power circuit in the powered-on working state, realizing the standby wake-up circuit without power loss, and reducing the power loss of the main control unit in the wake-up standby mode, while no additional wiring harness and interface between the host and the slave are required, thereby improving the utilization rate of the circuit.

[0023] In a fourth aspect, an embodiment of the present invention provides a circuit board, comprising the standby wake-up circuit as described in the embodiment of the first aspect above.

[0024] The circuit board provided according to the embodiment of the present invention has at least the following beneficial effects: when the host needs to drive the main control unit, since the main control unit cannot control the normal operation of the bridgeless PFC module in the power-off state, the main power cannot pass through the bridgeless PFC module, and thus cannot wake up the main control unit. Therefore, the current loop communication circuit between the host and the slave can be utilized, and the neutral line and the signal line of the current loop communication circuit are respectively connected to the second power conversion module, so that the second power conversion module can receive the wake-up voltage provided by the host side through the current loop communication circuit, and after the voltage conversion by the second power conversion module, the converted wake-up voltage is output to the main control unit, thereby being able to wake up the main control unit. Therefore, when the standby wake-up circuit is completely powered off, the current loop communication circuit can be reused to provide a wake-up voltage from the host side to the slave side, so that the main control unit can be awakened. Compared with the related art of additionally setting an auxiliary power supply circuit between the host and the slave to power the control chip separately, the standby wake-up circuit provided by the embodiment of the present invention does not require a new wiring harness and interface between the host and the slave, and utilizes the current loop communication circuit for communication between the host and the slave to improve the convenience of the circuit. At the same time, when the main control unit needs to be in a standby dormant state, the standby wake-up circuit can be completely powered off without maintaining the auxiliary power supply circuit in a powered working state. The standby wake-up circuit has no power loss, and can reduce the power loss of the main control unit in the wake-up standby mode.

[0025] In a fifth aspect, an embodiment of the present invention provides an electronic device, comprising the standby wake-up circuit as described in the embodiment of the first aspect above or the circuit board provided in the embodiment of the fourth aspect above.

[0026] The electronic device provided according to the embodiment of the present invention has at least the following beneficial effects: when the host needs to drive the main control unit, since the main control unit cannot control the bridgeless PFC module to work normally in the power-off state, the main power cannot pass through the bridgeless PFC module, and thus cannot wake up the main control unit. Therefore, the current loop communication circuit between the host and the slave can be utilized, and the neutral line and the signal line of the current loop communication circuit are respectively connected to the second power conversion module, so that the second power conversion module can receive the wake-up voltage provided by the host side through the current loop communication circuit, and after the voltage conversion by the second power conversion module, the converted wake-up voltage is output to the main control unit, thereby being able to wake up the main control unit. Therefore, when the standby wake-up circuit is completely powered off, the current loop communication circuit can be reused to provide a wake-up voltage from the host side to the slave side, so that the main control unit can be awakened. Compared with the related art of additionally setting an auxiliary power supply circuit between the host and the slave to power the control chip separately, the standby wake-up circuit provided by the embodiment of the present invention does not require a new wiring harness and interface between the host and the slave, and utilizes the current loop communication circuit for communication between the host and the slave to improve the convenience of the circuit. At the same time, when the main control unit needs to be in a standby dormant state, the standby wake-up circuit can be completely powered off without maintaining the auxiliary power supply circuit in a powered working state. The standby wake-up circuit has no power loss, and can reduce the power loss of the main control unit in the wake-up standby mode.

[0027] In a sixth aspect, an embodiment of the present invention provides a computer-readable storage medium, wherein the computer-readable storage medium stores computer-executable instructions, and the computer-executable instructions are used to enable a computer to execute the control method described in the embodiment of the second aspect above.

[0028] According to the computer-readable storage medium provided by the embodiment of the present invention, there are at least the following beneficial effects: when the standby wake-up circuit is completely powered off, the host side provides a wake-up voltage to the second power conversion module through the neutral line and the signal line of the current loop communication circuit, so that the second power conversion module can convert the wake-up voltage and output the converted wake-up voltage to the main control unit, thereby waking up the main control unit. After the main control unit wakes up, the bridgeless PFC module can be controlled so that the main power is transmitted to the first power conversion module through the bridgeless PFC module, and then the main power is supplied to the main control unit after the voltage conversion of the main power by the first power conversion module, thereby completing the power-on operation of the main control unit. Therefore, when the standby wake-up circuit is completely powered off, the communication circuit between the host and the slave, that is, the current loop communication circuit, can be used to provide power to the second power conversion module of the standby wake-up circuit on the slave side, thereby waking up the main control unit on the slave side, without maintaining the auxiliary power circuit in the energized working state, realizing no power loss in the standby wake-up circuit, and reducing the power loss of the main control unit in the wake-up standby mode, while no additional wiring harness and interface between the host and the slave are required, thereby improving the utilization rate of the circuit.

[0029] Other features and advantages of the present invention will be described in the following description, and partly become apparent from the description, or understood by practicing the present invention. The purpose and other advantages of the present invention can be realized and obtained by the structures particularly pointed out in the description, claims and drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] The accompanying drawings are used to provide a further understanding of the technical solution of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the technical solution of the present invention and do not constitute a limitation on the technical solution of the present invention.

[0031] The present invention is further described below in conjunction with the accompanying drawings and embodiments;

[0032] Figure 1 It is a structural schematic diagram of a three-phase bridgeless PFC circuit in the related art;

[0033] Figure 2 is a structural schematic diagram of a current loop communication circuit provided by an embodiment of the present invention;

[0034] Figure 3 is a structural schematic diagram of a standby wake-up circuit provided by an embodiment of the present invention;

[0035] Figure 4 is a structural schematic diagram of a second power conversion module provided by an embodiment of the present invention;

[0036] Figure 5 is a structural schematic diagram of another standby wake-up circuit provided by an embodiment of the present invention;

[0037] Figure 6 It is a structural schematic diagram of an operation control device provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0038] This section will describe in detail the specific embodiments of the present invention. The preferred embodiments of the present invention are shown in the accompanying drawings. The purpose of the accompanying drawings is to supplement the description of the text part of the specification with graphics, so that people can intuitively and vividly understand each technical feature and the overall technical solution of the present invention, but it cannot be understood as a limitation on the scope of protection of the present invention.

[0039] In the description of the present invention, "several" means one or more, "more" means more than two, "greater than", "less than", "exceed", etc. are understood to exclude the number itself, "above", "below", "within", etc. are understood to include the number itself, "at least one" means one or more, "at least one of the following" and similar expressions refer to any combination of these items, including any combination of single or plural items. If there is a description of the first and the second, it is only used for the purpose of distinguishing the technical features, and cannot be understood as indicating or implying the relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0040] It should be noted that the terms such as setting, installing, and connecting in the embodiments of the present invention should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above terms in the embodiments of the present invention in combination with the specific content of the technical solution. For example, the term "connection" can be a mechanical connection, an electrical connection, or mutual communication; it can be directly connected or indirectly connected through an intermediate medium.

[0041] It should be noted that the technical features involved in the various embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0042] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, connecting, etc. should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention based on the specific content of the technical solution.

[0043] At present, for devices powered by an external power supply, such as a single-chip microcomputer, when the external power supply to the single-chip microcomputer is cut off and the single-chip microcomputer is turned off, if it is necessary to wake up the single-chip microcomputer again, an additional device is usually required to achieve it. For example, some devices use power switching devices to implement a bridgeless PFC circuit to power the control chip. Since the bridgeless PFC circuit must rely on the control chip to control the corresponding power switching devices to achieve current rectification processing, when the control chip is powered off and enters the standby mode, the power switching devices in the bridgeless PFC circuit cannot be controlled to power the control chip before the control chip is powered on, resulting in the bridgeless PFC circuit being unable to wake up the control chip, and then causing the bridgeless PFC circuit to fail to work properly. For example, Figure 1 In the three-phase bridgeless PFC circuit shown, a relay circuit and a rectifier circuit are sequentially arranged in the three-phase circuit, and the rectifier circuit includes six switch tubes, which are controlled by the control chip to perform switching actions and play the role of a rectifier bridge. The relay circuit is provided with two relays. When the relay is disconnected, the subsequent circuit is powered off. Therefore, when the three-phase bridgeless PFC circuit needs to enter the standby state to reduce power consumption, all the relays in the relay circuit are disconnected, so that the control chip is completely powered off. If the control chip needs to be awakened, even if all the relays in the relay are turned on, all the switch tubes in the rectifier circuit are still in the disconnected state, and the subsequent load and control chip still cannot be powered. Therefore, in the related art, an auxiliary power supply circuit needs to be additionally arranged for the bridgeless PFC circuit to supply power to the control chip separately, so that the control chip can control the switch tubes in the rectifier circuit according to the instructions of the host computer, and realize the use of a three-phase power supply to supply power to the subsequent load and the control chip. After the three-phase bridgeless PFC circuit enters the standby state, all relays and all switch tubes are disconnected, and the three-phase bridgeless PFC circuit is completely powered off, but the auxiliary power supply circuit is still powered on to wake up the control chip at any time, so it is difficult to reduce the power consumption of the circuit. In addition, due to the addition of an auxiliary power supply circuit, in some electrical systems, additional wiring harnesses and interfaces are required between the host and the slave, which is inconvenient to use and has high modification costs. Therefore, how to achieve low-power consumption to wake up the control chip in standby mode has become an urgent problem to be solved.

[0044] Based on this, an embodiment of the present invention provides a standby wake-up circuit, a control method, an apparatus, a circuit board and an electronic device, which utilizes a communication circuit between a host and a slave, namely a current loop communication circuit, and connects the neutral line and the signal line in the current loop communication circuit to the second power conversion module of the standby wake-up circuit on the slave side, respectively. Therefore, when the host needs to drive the main control unit, since the main control unit cannot control the bridgeless PFC module to work normally in a power-off state, the main power cannot pass through the bridgeless PFC module, thereby failing to wake up the main control unit. Therefore, the current loop communication circuit between the host and the slave can be utilized to provide a wake-up voltage to the second power conversion module through the neutral line and the signal line of the current loop communication circuit. After voltage conversion by the second power conversion module, the converted wake-up voltage is output to the main control unit, thereby being able to wake up the main control unit. Therefore, when the standby wake-up circuit is completely powered off, the current loop communication circuit can be reused to provide a wake-up voltage from the host side to the slave side, so that the main control unit can be awakened. Compared with the related art of additionally setting an auxiliary power supply circuit between the host and the slave to power the control chip separately, the standby wake-up circuit provided by the embodiment of the present invention does not require a new wiring harness and interface between the host and the slave, and utilizes the current loop communication circuit for communication between the host and the slave to improve the convenience of the circuit. At the same time, when the main control unit needs to be in a standby dormant state, the standby wake-up circuit can be completely powered off without maintaining the auxiliary power supply circuit in a powered working state. The standby wake-up circuit has no power loss, and can reduce the power loss of the main control unit in the wake-up standby mode.

[0045] The embodiments of the present invention are further described below in conjunction with the accompanying drawings.

[0046] Reference Figure 2 , Figure 2 The structure diagram of the current loop communication circuit provided by the embodiment of the present invention is shown. It can be understood that the current loop communication circuit can be applied to the communication circuit between the indoor unit and the outdoor unit in the air-conditioning system, and the current loop communication circuit includes a host side circuit and a slave side circuit, and the host side circuit includes a neutral line N and a live line L, wherein a host half-wave rectifier circuit is arranged between the neutral line N and the live line L, and the host half-wave rectifier circuit can rectify the voltage between the neutral line and the live line L, and the communication voltage output by the host half-wave rectifier circuit can be used as the power supply of the current loop communication circuit, that is, the wake-up voltage of the standby wake-up circuit 100 in the slave side. Among them, as Figure 2As shown, the current loop communication circuit includes four photocouplers, and the four photocouplers are connected in series to form a current loop circuit. Among them, the output end of the first communication photocoupler IC1 is the host receiving end RXI, the output end of the second communication photocoupler IC2 is the host transmitting end TXI, the output end of the third communication photocoupler IC3 is the slave transmitting end TXO, and the output end of the fourth communication photocoupler IC4 is the slave receiving end RXO. When the second communication photocoupler IC2 and the third communication photocoupler IC3 are both in the on state, current flows through the current loop circuit, and at this time, the level states of the host receiving end RXI and the slave receiving end RXO are both high. When the second communication photocoupler IC2 or the third communication photocoupler IC3 is in the off state, no current flows through the current loop circuit, and at this time, the level states of the host receiving end RXI and the slave receiving end RXO are both low. When the main control unit 110 of the standby wake-up circuit 100 on the slave side is in a power-off state, the main control unit 110 cannot send a signal through the slave transmitting end TXO, causing the third communication photoelectric coupler IC3 to be in a disconnected state, so that the host and the slave cannot communicate; if the host transmitting end TXI inputs a low-level signal, the second communication photoelectric coupler IC2 is turned on, and the voltage between the neutral line N and the signal line S is the communication voltage VCC (i.e., the wake-up voltage); if the host transmitting end TXI inputs a high-level signal, the second communication photoelectric coupler IC2 is disconnected, and the signal line S is open-circuited with the half-wave rectifier circuit, and the voltage between the neutral line N and the signal line S is zero.

[0047] It should be noted that the first current limiting resistor R1, the second current limiting resistor R2, the third current limiting resistor R7 and the fourth current limiting resistor R8 are added to the live line L and the signal line S in the current loop communication circuit respectively. Since the conventional current loop communication circuit only has a communication function, the current flowing through the signal line S and the neutral line N is small. However, the embodiment of the present invention uses the current loop communication circuit to wake up and power on the main control unit 110. The voltage between the neutral line N and the signal line S needs to drive the relay circuit, the switch tube and the main control unit 110 and other loads, and the required current is large. Therefore, by adding the first current limiting resistor R1, the second current limiting resistor R2, the third current limiting resistor R7 and the fourth current limiting resistor R8 to protect the current loop communication circuit, the first current limiting resistor R1, the second current limiting resistor R2, the third current limiting resistor R7 and the fourth current limiting resistor R8 can be adjusted according to the actual current value, and the parameters of the first communication photoelectric coupling IC1, the second communication photoelectric coupling IC2, the third communication photoelectric coupling IC3 and the fourth communication photoelectric coupling IC4 can be adjusted.

[0048] Reference Figure 3 , Figure 3FIG. 1 is a schematic diagram of the structure of the standby wake-up circuit 100 provided in an embodiment of the present invention. It can be understood that the standby wake-up circuit 100 includes a bridgeless PFC module 120, a main control unit 110, a first power conversion module 130 and a second power conversion module 140. The bridgeless PFC module 120 includes a PFC rectifier circuit that uses a switch tube to partially or completely replace a rectifier bridge or a rectifier diode, for example, Figure 3 As shown, the bridgeless PFC module 120 includes six switches and two rectifier capacitors, specifically switch tube Q1, switch tube Q2, switch tube Q3, switch tube Q4, switch tube Q5, switch tube Q6, rectifier capacitor C1 and rectifier capacitor C2, wherein all the switches in the bridgeless PFC module 120 are connected to the main control unit 110, so that the main control unit 110 can switch all the switches in the bridgeless PFC module 120 according to the instructions of the host computer, thereby realizing the control of the bridgeless PFC module 120. And the main power supply (such as Figure 2 The three-phase power supply shown in the figure is output to the first power conversion module 130 after passing through the bridgeless PFC module 120 in the working state. The first power conversion module 130 steps down the voltage output by the bridgeless PFC module 120, and then provides the stepped-down voltage to the main control unit 110, so that the main control unit 110 can be powered on by the main power supply.

[0049] The neutral line N and the signal line S of the current loop communication circuit are respectively connected to the second power conversion module 140. When the level state of the host transmitting end TXI is at a low level, the second photocoupler IC2 is turned on, and the voltage between the neutral line N and the signal line S is the wake-up voltage, so that the wake-up voltage can be provided to the second power conversion module. The second power conversion module 140 performs voltage conversion on the wake-up voltage, and outputs the converted wake-up voltage to the main control unit 110 on the slave side through the ring output port, so that the main control unit 110 is powered on and awakened, and then the main control unit 110 can control the bridgeless PFC module 120 according to the instructions of the host side (such as the voltage signal between the signal line S and the neutral line N in the current loop communication circuit), so that the main power can be supplied to the main control unit 110 through the bridgeless PFC module 120 and the first power conversion module 130 in turn, and the power-on operation of the main control unit 110 is completed. When the main control unit 110 needs to be in standby sleep mode, the bridgeless PFC module 120 can be controlled to be turned off, cutting off the power supply line from the main power supply to the main control unit 110, thereby realizing the power-off operation of the main control unit 110. When the wake-up voltage is received, the current loop communication circuit and the second power conversion module 140 can be used to provide a wake-up voltage from the host side to the main control unit 110 on the slave side, thereby waking up the main control unit 110 in the standby sleep mode. Therefore, when the standby wake-up circuit 100 is completely powered off, the main control unit 110 can be directly awakened by the wake-up voltage provided by the neutral line N and the live line L of the current loop communication circuit, thereby realizing the wake-up control of the main control unit 110 by the host side. Compared with the related art of additionally setting up an auxiliary power supply circuit to power the control chip separately, the standby wake-up circuit 100 provided in the embodiment of the present invention does not need to add a wiring harness and interface between the host and the slave, and utilizes the current loop communication circuit for communication between the host and the slave to improve the convenience of the circuit. At the same time, when the main control unit 110 needs to be in a standby dormant state, the standby wake-up circuit 100 can be completely powered off without maintaining the auxiliary power supply circuit in a powered-on working state. The standby wake-up circuit 100 has no power loss, and can reduce the power loss of the main control unit 110 in the wake-up standby mode.

[0050] It should be noted that the first power conversion module 130 can be an isolated power conversion module or a non-isolated power conversion module, and the second power conversion module 140 is an isolated power conversion module.

[0051] It should be noted that the bridgeless PFC module 120 may include: Figure 3 The PWM bridgeless PFC circuit is shown, and the bridgeless PFC module 120 may also include a totem pole bridgeless PFC circuit or a single-phase bridgeless PFC circuit.

[0052] It should be noted that the standby wake-up circuit 100 can be applied to the outdoor unit of the air-conditioning system. Since the indoor unit in the air-conditioning system can always remain powered on, and the outdoor unit in the air-conditioning system can be powered off and enter the standby sleep mode when the air-conditioning system is shut down, when the air-conditioning system needs to be operated, the indoor unit can wake up the main control unit 110 in the outdoor unit through the standby wake-up circuit 100, thereby enabling the outdoor unit to be powered on and operated.

[0053] Reference Figure 4 , Figure 4The schematic diagram of the structure of the second power conversion module 140 provided in the embodiment of the present invention is shown. It can be understood that the second power conversion module 140 includes a wake-up control chip 141 and a power-on detection circuit 142, and the wake-up control chip 141 has an enable port EN for controlling the switch of the wake-up control chip 141, an output port SW for the wake-up control chip 141 to output power, and a power supply port VIN and a ground port GND for powering the wake-up control chip 141, wherein the neutral line N is connected to the power supply port VIN, the signal line S is connected to the ground port GND, and the output port SW is connected to the main control unit 110, and the neutral line N and the signal line S can be used to provide a wake-up voltage for the wake-up control chip 141, and the wake-up voltage can power the wake-up control chip 141, and then the wake-up control chip 141 can perform voltage conversion on the wake-up voltage and output the converted wake-up voltage through the output port SW. In addition, the enable port EN and the power-on detection circuit 142, the power-on detection circuit 142 can detect the power-on status of the main control unit 110. The level state of the enable port EN is different when the main control unit 110 is in a different power-on status, that is, the wake-up control chip 141 is in a different switching state. Therefore, when the main control unit 110 is not powered on, the enable port EN is in a high level state, and the wake-up control chip 141 is turned on. After being powered on, the wake-up control chip 141 can convert the wake-up voltage to supply power to the main control unit 110 and wake up the main control unit 110; when the main control unit 110 is successfully powered on, the enable port EN is in a low level state, and the wake-up control chip 141 is turned off, so that the main control unit 110 cannot be powered on by the second power conversion module 140, thereby saving power. Therefore, when the standby wake-up circuit 100 is completely powered off, the neutral line N and the signal line S of the current loop communication circuit are used to provide a wake-up voltage to the second power conversion module 140 of the standby wake-up circuit 100, so that the main control unit 110 can be directly woken up without maintaining the auxiliary power supply circuit in operation all the time, thereby realizing the host's wake-up control of the main control unit 110. At the same time, the standby wake-up circuit 100 has no power consumption in the standby sleep state. Compared with the method in the related art that the auxiliary power supply circuit is always in operation to realize the wake-up of the main control unit 110, the power loss of the circuit in the standby sleep state can be reduced. At the same time, due to the reuse of the current loop communication circuit between the host and the slave, there is no need to increase the wiring harness and interface between the host and the slave, thereby improving the utilization and convenience of the circuit.

[0054] It should be noted that the wake-up control chip 141 also includes a bootstrap port BST, which is connected to the output port SW through a bootstrap capacitor C3. A power regulator is also provided inside the wake-up control chip 141. The power regulator charges the bootstrap capacitor C3 through the bootstrap port BST, so that the bootstrap capacitor C3 forms a floating power supply, thereby assisting the wake-up control chip 141 to work normally (such as providing driving energy for the switch tube inside the wake-up control chip 141), so that the output port SW can output the required voltage.

[0055] It can be understood that the power-on detection circuit 142 includes a first switch component, and the main control unit 110 includes a power port IN and a signal control port K, wherein the power port IN can supply power to the main control unit 110, wherein the power port IN can be connected to the wake-up output port OUT of the second power conversion module 140, and can also be connected to the first power conversion module 130. When the main control unit 110 is powered on, the power port IN can detect the corresponding voltage signal, and the main control unit 110 can send a control signal for controlling the wake-up control chip 141 through the signal control port K. The power port IN, the signal control port K and the enable port EN are respectively connected to the first switch component, wherein the input port of the first switch component is respectively connected to the power port IN and the signal control port K, and the output end of the first switch component is connected to the enable port EN, so that the first switch component switches the conduction state according to the level states of the power port IN and the signal control port K. For example, when the main control unit 110 is successfully powered on, the power port IN is in a high level state, and after power is obtained, the main control unit 110 can send a high level control signal through the signal control port K to control the wake-up control chip 141 to enter the shutdown state. Therefore, the power port IN and the signal control port K are both in a high level state, and the first switch component is turned on, so that the level state at the enable port EN is converted from a low level to a high level, thereby switching the wake-up control chip 141 from the running state to the shutdown state. It should be noted that the first switch component can be a transistor, and the power port IN can be connected to the collector of the transistor, the signal control port K can be connected to the base of the transistor, and the enable port EN can be connected to the emitter. Therefore, when the power port IN and the signal control port K are both in a high level state, the transistor is turned on, and the enable port EN is in a high level, so that the wake-up control chip 141 stops supplying power to the main control unit 110. When the main control unit 110 is not successfully powered on, that is, the power port IN or the signal control port K is in a low level state, the first switch component is cut off, and the enable port EN maintains the current level state, that is, the wake-up control chip 141 maintains the current state, such as maintaining power to the main control unit 110 until the main control unit 110 is successfully powered on.

[0056] It can be understood that the first switch component includes a first switch tube Q1 and a first photocoupler IC6, the power port IN is connected to the input end of the light source of the first photocoupler IC6, and the first end of the first switch tube Q1 (such as the collector of the triode) is connected to the output end of the light source of the first photocoupler IC6. When the voltage between the input end and the output end of the light source is normal, the light source emits light, and the first photocoupler IC6 is turned on. In addition, the second end of the first switch tube Q1 (such as the base of the triode) is connected to the signal control port K, and the third end of the first switch tube Q1 (such as the emitter of the triode) is grounded, and the control signal for controlling the wake-up control chip 141 to shut down is sent by the main control unit 110 through the signal control port K as a high-level signal. Therefore, when the main control unit 110 sends a high-level signal through the signal control port K to control the wake-up control chip 141 to shut down after powering on, the first switch tube Q1 is turned on, that is, the first photocoupler IC6 is turned on, so that the enable port EN of the light receiver connected to the first photocoupler IC6 can receive the corresponding shutdown signal. When the main control unit 110 is not powered, that is, the power port IN or the signal control port K is in a low level state, the first photocoupler IC6 is in a disconnected state. If the neutral line N and the signal line S provide a wake-up voltage, the wake-up control chip 141 starts working and provides voltage to the power port IN of the main control unit 110, so that the power port IN is in a high level state; if the wake-up control chip 141 is successfully connected to the main power supply through the first power conversion module 130 and the bridgeless PFC module 120, the signal control port K is in a high level state, the first photocoupler IC6 is in a conducting state, and the enable port EN receives a shutdown signal, then the wake-up control chip 141 is controlled to enter a shutdown state.

[0057] It can be understood that the neutral line N of the current loop communication circuit is connected to the input end of the photoreceiver of the first photocoupler IC6, the signal line S is connected to the output end of the photoreceiver of the first photocoupler IC6, and the enable port EN is connected to the connection point between the neutral line N and the input end of the photoreceiver of the first photocoupler IC6. Therefore, when the first photocoupler IC6 is disconnected, the neutral line N provides a high-level signal to the enable port EN, thereby waking up the control chip 141 to work; and when the first photocoupler IC6 is turned on, the level at the enable port EN is pulled low, thereby waking up the control chip 141 to shut down.

[0058] It can be understood that the second power conversion module also includes an isolation transformer T1 and a half-wave rectifier circuit 143, wherein the primary side of the isolation transformer T1 is connected to the output port SW of the wake-up control chip 141, and the secondary side of the isolation transformer T1 is connected to the main control unit 110 through the half-wave rectifier circuit 143. Therefore, after the wake-up voltage is processed by the voltage conversion of the wake-up control chip 141, the converted voltage is output to the isolation transformer T1, and the voltage is converted by the isolation transformer T1. Secondary voltage conversion is performed on the voltage, and then the half-wave rectifier circuit 143 can process the voltage signal again to provide a stable voltage for the main control unit 110 to wake up.

[0059] It should be noted that the half-wave rectified current 143 includes a diode D1 and a half-wave rectifier capacitor C10, the positive electrode of the diode D1 is connected to the secondary side of the isolation transformer T1, the negative electrode of the diode D1 is connected to the output port OUT and one end of the half-wave rectifier capacitor C10 respectively, and the other end of the half-wave rectifier capacitor C10 is grounded.

[0060] It can be understood that the second power conversion module 140 also includes a feedback component 144, and the wake-up control chip 141 also includes a feedback port FB, and the feedback port FB is connected to the primary side of the isolation transformer T1 through the feedback component 144, so that the wake-up control chip 141 can obtain a voltage feedback signal through the feedback component 144, and then perform voltage conversion on the wake-up voltage, adjust the voltage value output by the output port SW, and provide a more accurate voltage for the primary side of the isolation transformer T1, thereby helping to provide a suitable voltage for the main control unit 110.

[0061] It can be understood that the feedback component 144 includes a first feedback capacitor C7, a first feedback resistor R10 and a second feedback resistor R11, the feedback port FB is grounded through the first feedback capacitor C7, and the second feedback resistor R11 is connected in parallel with the first feedback capacitor C7. In addition, one end of the first feedback resistor R10 is connected to the connection point between the first feedback capacitor C7 and the feedback port FB, and the other end is connected to the primary side of the isolation transformer T1. Therefore, the wake-up control chip 141 can use the voltage division and filtering processing of the feedback component 144 to receive the feedback voltage, and then use the feedback voltage to adjust the voltage output by the output port SW to provide a suitable voltage for the main control unit 110 to wake up.

[0062] like Figure 5As shown, it can be understood that the standby wake-up circuit 100 also includes a voltage stabilizing module, such as a low drop-out regulator (LDO). In order to provide a stable power supply voltage to the main control unit 110, the first power conversion module 130 and the second power conversion module 140 are both connected to the input end of the voltage stabilizing module, and the output port of the voltage stabilizing module is connected to the main control unit 110. Therefore, when the main power supply is used to power the main control unit 110, the main power supply is sequentially processed by the bridgeless PFC module 120 and the first power conversion module 130, and then enters the voltage stabilizing module for voltage stabilization, and then provides the voltage after voltage stabilization to the main control unit 110. Correspondingly, when the main control unit 110 is awakened by the wake-up voltage provided by the neutral line N and the signal line S, the wake-up voltage enters the voltage stabilizing module after the voltage conversion of the second power conversion module 140, so that the voltage stabilizing module can be used to provide a stable voltage to the main control unit 110 to wake up the main control unit 110.

[0063] It can be understood that in the initial state, the host transmitting end TXI in the current loop communication circuit is in a high level state, the second communication optocoupler IC2 is in a disconnected state, and there is an open circuit between the neutral line N and the signal line S with no output voltage, and the slave side, i.e., the standby wake-up circuit 100, is in a completely power-off state with no power loss. When power is required, the host transmitting end TXI switches to a low level state, the second communication photoelectric coupler IC2 is in a conducting state, the neutral line N and the signal line S can provide a wake-up voltage to the second power conversion module 140, and at this time, the power port IN of the main control unit 110 is not powered, that is, the light source of the first photoelectric coupler IC6 is open. Since the power supply port VIN of the wake-up control chip 141 is connected to the neutral line N, and the ground port GND is connected to the signal line S, the wake-up control chip 141 starts to work, and the wake-up control chip 141 outputs the converted wake-up voltage to the power port IN of the main control unit 110 through the isolation transformer T1 and the half-wave rectifier circuit 143. After the main control unit 110 is powered, it can control the relay circuit and the bridgeless PFC module 120, so that the main power supply can supply power to the main control unit 110 through the bridgeless PFC module 120 and the first power conversion module 130, completing the wake-up operation and power-on operation of the main control unit 110. When the main control unit 110 is powered on, the main control unit 110 can output a high-level control signal through the signal control port K, the first switch tube Q1 is turned on, and the first photocoupler IC6 is turned on, thereby causing the voltage of the enable port EN to be pulled down, and the wake-up control chip 141 stops working, so that the current loop communication circuit stops supplying power to the main control unit 110 and is only used for communication between the host and the slave.

[0064] When the slave side, i.e., the standby wake-up circuit 100, needs to be powered off and shut down, the host side can send a shutdown command to the main control unit 110 in the slave side through the current loop communication circuit, and then the host transmitting terminal TXI of the host side is switched to a high level state, and the second communication photoelectric coupler IC2 is in a disconnected state, and there is no voltage between the neutral line N and the signal line S; after the main control unit 110 on the slave side receives the shutdown command, it can control the relay circuit and the bridgeless PFC module 120 to be disconnected, and the standby wake-up circuit 100 is completely powered off and enters the standby mode until the host transmitting terminal TXI of the host side is switched to a low level state, and the main control unit 110 on the slave side is powered on.

[0065] It can be understood by those skilled in the art that Figure 2 , Figure 3 , Figure 4 or Figure 5 The structure of the standby wake-up circuit 100 shown in the figure does not constitute a limitation on the embodiment of the present invention, and may include more or less components than those shown in the figure, or combine certain components, or arrange the components differently.

[0066] Based on the structure of the standby wake-up circuit 100, various embodiments of the control method of the standby wake-up circuit of the second aspect of the present invention are proposed. The control method can be applied to the host side of the current loop communication circuit, and the host side of the current loop communication circuit is connected to the host side of the current loop communication circuit through the neutral line and the signal line. Figure 2 , Figure 3 or Figure 4 The second power conversion module in the standby wake-up circuit shown is connected, and the control method includes but is not limited to the following steps:

[0067] Step S110: outputting a wake-up voltage to the second power conversion module through the neutral line and the signal line, so that the second power conversion module performs voltage conversion on the wake-up voltage and outputs the wake-up voltage after voltage conversion to the main control unit.

[0068] It can be understood that in the initial state, the host transmitting end in the current loop communication circuit is in a high level state, the second communication photoelectric coupler IC2 is in a disconnected state, and there is no output voltage between the neutral line and the signal line, and the slave side, that is, the standby wake-up circuit, is in a completely power-off state, and there is no power loss. When power is required, the host transmitting end of the current loop communication circuit is switched to a low level state, the second communication photoelectric coupler IC2 is in a conducting state, and the neutral line and the signal line can provide a wake-up voltage to the second power conversion module, while the power port of the main control unit is not powered at this time, that is, the light source of the first photoelectric coupler IC6 is open, and since the power supply port of the wake-up control chip is connected to the neutral line and the grounding port is connected to the signal line, the wake-up control chip starts to work, and the wake-up control chip outputs the converted wake-up voltage to the power port of the main control unit through the isolation transformer and the half-wave rectifier circuit. After the main control unit is powered, it can control the relay circuit and the bridgeless PFC module, so that the main power supply can supply power to the main control unit through the bridgeless PFC module and the first power conversion module, and complete the wake-up operation and power-on operation of the main control unit. When the main control unit is powered on, the main control unit can output a high-level control signal through the signal control port, the first switch tube is turned on, and the first photocoupler IC6 is turned on, thereby causing the voltage of the enable port to be pulled down, and the wake-up control chip stops working, so that the current loop communication circuit stops supplying power to the main control unit and is only used for communication between the host and the slave.

[0069] When the slave side, i.e., the standby wake-up circuit, needs to be powered off and shut down, the host side can send a shutdown command to the main control unit in the slave side through the current loop communication circuit, and then the host transmitting end of the host side switches to a high level state, and the second communication photoelectric coupler IC2 is in a disconnected state, and there is no voltage between the neutral line and the signal line; after the main control unit on the slave side receives the shutdown command, it can control the relay circuit and the bridgeless PFC module to be disconnected, and the standby wake-up circuit is completely powered off and enters the standby mode until the host transmitting end of the host side switches to a low level state, and the main control unit on the slave side is powered.

[0070] Thirdly, refer to Figure 6 An embodiment of the present invention provides an operation control device 600, including a memory 620, a processor 610, and a computer program stored in the memory 620 and executable on the processor 610. The processor 610 executes the program to implement the control method of the second aspect embodiment as described above, for example, executing the above-mentioned method step S110.

[0071] According to the operation control device provided by the embodiment of the present invention, when the standby wake-up circuit is completely powered off, the host side provides a wake-up voltage to the second power conversion module through the neutral line and the signal line of the current loop communication circuit, so that the second power conversion module can convert the wake-up voltage and output the converted wake-up voltage to the main control unit, thereby waking up the main control unit. After the main control unit wakes up, the bridgeless PFC module can be controlled so that the main power is transmitted to the first power conversion module through the bridgeless PFC module, and then the main power is supplied to the main control unit after the voltage conversion of the main power by the first power conversion module, thereby completing the power-on operation of the main control unit. Therefore, when the standby wake-up circuit is completely powered off, the communication circuit between the host and the slave, that is, the current loop communication circuit, can be used to provide power to the second power conversion module of the standby wake-up circuit on the slave side, thereby waking up the main control unit on the slave side, without maintaining the auxiliary power circuit in the energized working state, realizing no power loss in the standby wake-up circuit, and reducing the power loss of the main control unit in the wake-up standby mode, while no additional wiring harness and interface between the host and the slave are required, thereby improving the utilization rate of the circuit.

[0072] In a fourth aspect, an embodiment of the present invention provides a circuit board, which includes a standby wake-up circuit as described in the first aspect of the embodiment above. The circuit board is provided with a bridgeless PFC module, a main control unit, a first power conversion module, and a second power conversion module. When the host needs to drive the main control unit, since the main control unit cannot control the normal operation of the bridgeless PFC module in a power-off state, the main power cannot pass through the bridgeless PFC module, thereby failing to wake up the main control unit. Therefore, the current loop communication circuit between the host and the slave can be used to connect the neutral line and the signal line of the current loop communication circuit to the second power conversion module respectively, so that the second power conversion module can receive the wake-up voltage provided by the host side through the current loop communication circuit, and after the voltage conversion by the second power conversion module, the converted wake-up voltage is output to the main control unit, thereby being able to wake up the main control unit. Therefore, when the standby wake-up circuit is completely powered off, the current loop communication circuit can be reused to provide a wake-up voltage from the host side to the slave side, so that the main control unit can be awakened. Compared with the related art of additionally setting an auxiliary power supply circuit between the host and the slave to power the control chip separately, the standby wake-up circuit provided by the embodiment of the present invention does not require a new wiring harness and interface between the host and the slave, and utilizes the current loop communication circuit for communication between the host and the slave to improve the convenience of the circuit. At the same time, when the main control unit needs to be in a standby dormant state, the standby wake-up circuit can be completely powered off without maintaining the auxiliary power supply circuit in a powered working state. The standby wake-up circuit has no power loss, and can reduce the power loss of the main control unit in the wake-up standby mode.

[0073] In a fifth aspect, an embodiment of the present invention provides an electronic device, the electronic device comprising a standby wake-up circuit as provided in the first aspect embodiment above or a circuit board as provided in the fourth aspect embodiment above. The electronic device is provided with a bridgeless PFC module, a main control unit, a first power conversion module and a second power conversion module. When the host needs to drive the main control unit, since the main control unit cannot control the bridgeless PFC module to work normally in a power-off state, the main power cannot pass through the bridgeless PFC module, and thus cannot wake up the main control unit. Therefore, the current loop communication circuit between the host and the slave can be used to connect the neutral line and the signal line of the current loop communication circuit to the second power conversion module respectively, so that the second power conversion module can receive the wake-up voltage provided by the host side through the current loop communication circuit, and after the voltage conversion of the second power conversion module, the converted wake-up voltage is output to the main control unit, thereby being able to wake up the main control unit. Therefore, when the standby wake-up circuit is completely powered off, the current loop communication circuit can be reused to provide a wake-up voltage from the host side to the slave side, so that the main control unit can be awakened. Compared with the related art of additionally setting an auxiliary power supply circuit between the host and the slave to power the control chip separately, the standby wake-up circuit provided by the embodiment of the present invention does not require a new wiring harness and interface between the host and the slave, and utilizes the current loop communication circuit for communication between the host and the slave to improve the convenience of the circuit. At the same time, when the main control unit needs to be in a standby dormant state, the standby wake-up circuit can be completely powered off without maintaining the auxiliary power supply circuit in a powered working state. The standby wake-up circuit has no power loss, and can reduce the power loss of the main control unit in the wake-up standby mode.

[0074] In a sixth aspect, an embodiment of the present invention provides a computer-readable storage medium, which stores computer-executable instructions. The computer-executable instructions are used to enable a computer to execute the control method of the standby wake-up circuit of the second aspect embodiment above, for example, to execute the above-mentioned method step S110.

[0075] According to the computer-readable storage medium provided by the embodiment of the present invention, when the standby wake-up circuit is completely powered off, the host side provides a wake-up voltage to the second power conversion module through the neutral line and the signal line of the current loop communication circuit, so that the second power conversion module can convert the wake-up voltage and output the converted wake-up voltage to the main control unit, thereby waking up the main control unit. After the main control unit wakes up, the bridgeless PFC module can be controlled so that the main power is transmitted to the first power conversion module through the bridgeless PFC module, and then the main power is supplied to the main control unit after the voltage conversion of the main power by the first power conversion module, and the power-on operation of the main control unit is completed. Therefore, when the standby wake-up circuit is completely powered off, the communication circuit between the host and the slave, that is, the current loop communication circuit, can be used to provide power to the second power conversion module of the standby wake-up circuit on the slave side, thereby waking up the main control unit on the slave side, without maintaining the auxiliary power circuit in the energized working state, realizing no power loss in the standby wake-up circuit, and reducing the power loss of the main control unit in the wake-up standby mode, while no additional wiring harness and interface between the host and the slave are required, thereby improving the utilization rate of the circuit.

[0076] It will be appreciated by those skilled in the art that all or some of the steps and systems in the disclosed methods above may be implemented as software, firmware, hardware and appropriate combinations thereof. Some physical components or all physical components may be implemented as software executed by a processor, such as a central processing unit, a digital signal processor or a microprocessor, or implemented as hardware, or implemented as an integrated circuit, such as an application specific integrated circuit. Such software may be distributed on a computer-readable medium, which may include a computer storage medium or a non-transitory medium and a communication medium or a temporary medium. As known to those skilled in the art, the term computer storage medium includes volatile and non-volatile, removable and non-removable media implemented in any method or technology for storing information such as computer-readable instructions, data structures, program modules or other data. Computer storage media include, but are not limited to, RAM, ROM, EEPROM, flash memory or other memory technologies, CD-ROM, digital versatile disk DVD or other optical disk storage, magnetic cassettes, magnetic tapes, disk storage or other magnetic storage devices, or any other medium that may be used to store desired information and may be accessed by a computer. Furthermore, it is well known to those skilled in the art that communication media typically embodies computer readable instructions, data structures, program modules, or other data in a modulated data signal such as a carrier wave or other transport mechanism, and may include any information delivery media.

[0077] The embodiments of the present invention are described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Various changes can be made within the knowledge scope of ordinary technicians in the technical field without departing from the purpose of the present invention.

Claims

1. A standby wake-up circuit, characterized in that: Applied to the slave side of a current loop communication circuit, the host side of the current loop communication circuit is connected to the slave side of the current loop communication circuit through a neutral line and a signal line respectively; The standby wake-up circuit comprises: Bridgeless PFC module for access to the main power supply; A main control unit connected to the bridgeless PFC module, the main control unit being used to control the bridgeless PFC module; A first power conversion module, connected to the bridgeless PFC module and the main control unit respectively, the first power conversion module is used to convert the voltage output by the bridgeless PFC module and supply power to the main control unit; A second power conversion module is respectively connected to the neutral line, the signal line and the main control unit. The second power conversion module is used to receive the wake-up voltage on the host side of the current loop communication circuit, and convert the wake-up voltage and output it to the main control unit to wake up the main control unit, so that the main control unit controls the bridgeless PFC module to power on the main control unit using the main power supply.

2. The standby wake-up circuit according to claim 1, characterized in that: The second power conversion module includes a wake-up control chip for controlling the wake-up of the main control unit, and a power-on detection circuit for detecting the power-on status of the main control unit. The wake-up control chip includes an enable port, a power supply port, a ground port and an output port. The enable port is connected to the power-on detection circuit, the neutral line is connected to the power supply port, the signal line is connected to the ground port, and the output port is connected to the main control unit.

3. The standby wake-up circuit according to claim 2, characterized in that: The power-on detection circuit includes a first switch component, and the enable port, the power port and the signal control port of the main control unit are respectively connected to the first switch component, so that the main control unit can control the level state of the enable port by controlling the conduction state of the first switch component when powered on.

4. The standby wake-up circuit according to claim 3, characterized in that: The first switch component includes a first switch tube and the first photocoupler, the power port and the first end of the first switch tube are respectively connected to the light source of the first photocoupler, the second end of the first switch tube is connected to the signal control port, the third end of the first switch tube is grounded, and the light receiver of the first photocoupler is connected to the enable port.

5. The standby wake-up circuit according to claim 4, characterized in that: The neutral line is connected to the input end of the light receiver, the signal line is connected to the output end of the light receiver, and the enable port is connected to the connection point between the neutral line and the input end of the light receiver.

6. The standby wake-up circuit according to claim 2, characterized in that: The second power conversion module also includes an isolation transformer and a half-wave rectifier circuit. The output port is connected to the primary side of the isolation transformer, and the half-wave rectifier circuit is respectively connected to the main control unit and the secondary side of the isolation transformer.

7. The standby wake-up circuit according to claim 6, characterized in that: The wake-up control chip further includes a feedback port, and the second power conversion module further includes a feedback module. The feedback port is connected to the primary side of the isolation transformer through the feedback module.

8. The standby wake-up circuit according to claim 7, characterized in that: The feedback module includes a first feedback capacitor, a first feedback resistor and a second feedback resistor. The feedback port is connected to the primary side of the isolation transformer through the first feedback resistor. The first feedback capacitor and the second feedback resistor are respectively connected to the connection point between the feedback port and the first feedback resistor, and the first feedback capacitor and the second feedback resistor are both grounded.

9. The standby wake-up circuit according to claim 1, characterized in that: The standby wake-up circuit also includes a voltage stabilizing module, and the first power conversion module and the second power conversion module are respectively connected to the main control unit through the voltage stabilizing module.

10. A control method for a standby wake-up circuit, characterized in that: Applied to the host side of the current loop communication circuit, the host side of the current loop communication circuit is connected to the second power conversion module in the standby wake-up circuit according to any one of claims 1 to 9 through a neutral line and a signal line respectively, and the control method includes: The wake-up voltage is output to the second power conversion module through the neutral line and the signal line, so that the second power conversion module performs voltage conversion on the wake-up voltage and outputs the wake-up voltage after voltage conversion to the main control unit.

11. An operation control device, characterized in that: The system comprises a memory, a processor and a computer program stored in the memory and executable on the processor, wherein the processor executes the program to implement the control method according to claim 10.

12. A circuit board, characterized in that: The invention comprises the standby wake-up circuit as claimed in any one of claims 1 to 9.

13. An electronic device, characterized in that: A standby wake-up circuit comprising any one of claims 1 to 9 or a circuit board comprising claim 12.

14. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores computer-executable instructions, and the computer-executable instructions are used to enable a computer to execute the control method according to claim 10.

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