Combination control circuit and control method thereof, equipment, medium and product

Abstract

The invention discloses a combination control circuit, a control method thereof, equipment, a medium and a product, and relates to the technical field of boost circuits, the combination control circuit comprises a state detection module and a switch module, the state detection module detects the voltage working state of each boost branch, and outputs a switch signal based on the working state of all boost branches, the switch module receives a switch signal and disconnects or connects the output end of each boost branch with the power supply output end, and can disconnect or connect the output end of each boost branch with the power supply output end based on the working state of all boost branches so as to prevent the output end of each boost branch from being connected with the power supply output end when all boost branches are in an abnormal working state or are not started. The voltage of the power supply input end is output to the power supply output end, so that the power supply output end is not really closed, the output voltage is lower than the requirement, and a post-stage circuit is damaged. Therefore, the effects of really turning off the power supply of the output end and protecting a post-stage circuit are achieved.

Description

Technical Field

[0001] The present application relates to the technical field of boost circuits, and particularly to a combining control circuit, its control method, device, medium, and product. Background Art

[0002] In many systems with high requirements for power supply reliability, such as servers and communication devices, ORing circuits (commonly used to prevent power backflow, and the basic forms include diode and MOS transistor solutions) are often used to achieve redundant backup of dual power supplies or multiple power supplies. It can connect multiple power inputs. When one of the power supplies fails or the voltage is abnormal, the ORing circuit can automatically switch the load to other normally operating power supplies to ensure that the system continuously obtains stable power supply and avoid equipment downtime caused by a single power supply failure.

[0003] For a boost-based ORing circuit, when the boost circuit stops working completely or malfunctions, there is still a residual voltage in the combined output voltage VOUT and it cannot be truly turned off. Since its voltage is lower than the normal voltage when the boost circuit is working, it may cause damage to the subsequent circuit, greatly reducing the reliability of the power supply. Summary of the Invention

[0004] The present application provides a combining control circuit, its control method, device, medium, and product to at least solve the problem in the related art that the boost circuit cannot be truly turned off and may cause damage to the subsequent circuit.

[0005] The present application provides a combining control circuit. The combining control circuit is connected to multiple boost branches and includes: A state detection module. The input ends of the state detection module are respectively connected to each boost branch, and are used to collect the operation information of each boost branch, judge the working state of all boost branches based on the operation information, and output a switching signal based on the working state of all boost branches; A switching module. The switching module is connected to the state detection module and is arranged between the output end of each boost branch and the power output end, and is used to receive a control signal and disconnect or establish the connection between the output end of the boost branch and the power output end based on the control signal.

[0006] The present application also provides a control method for a combining control circuit, which is applied to the combining control circuit as above and includes: Collect the operation information of each boost branch and judge the working state of all boost branches based on the operation information; Disconnect or conduct the connection between the output end of the boost branch and the power output end based on the working state of all boost branches.

[0007] The present application also provides an electronic device, including: a memory for storing a computer program; a processor for implementing the steps of any one of the above-mentioned control methods of the combining circuit when executing the computer program.

[0008] The present application also provides a computer-readable storage medium storing a computer program, wherein the computer program implements the steps of any one of the above-mentioned control methods of the combining circuit when executed by a processor.

[0009] The present application also provides a computer program product including a computer program, which implements the steps of any one of the above-mentioned control methods of the combining circuit when executed by a processor.

[0010] Through the present application, the state detection module respectively detects the voltage working states of each boost branch, and outputs a switching signal based on the working states of all the boost branches. The switching module receives the switching signal and disconnects or conducts the connection between the output ends of each boost branch and the power output end, and can disconnect or connect the output ends of each boost branch to the power output end based on the working states of all the boost branches, so as to prevent the voltage at the power input end from being output to the power output end when all the boost branches are in an abnormal working state, or when all the boost branches are not started, or when some of the boost branches are in an abnormal working state and some of the boost branches are not started. Thus, the problem that the power output end is not truly turned off, resulting in the voltage at the power input end being directly transmitted to the subsequent circuit without boosting, causing the output voltage to be lower than the requirement and damaging the subsequent circuit, and at the same time, there is still a problem that the voltage at the input end is transmitted to the power output end when all the boost branches are turned off and not working. Therefore, the effect of truly turning off the power at the output end and protecting the subsequent circuit is achieved. Description of the Drawings

[0011] To more clearly illustrate the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present application. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0012] Figure 1 is a related boost circuit; Figure 2 is a structural diagram of a combining circuit provided by an embodiment of the present application; Figure 3 is a structural diagram of another combining circuit provided by an embodiment of the present application; Figure 4 is a structural diagram of a state detection module in a combining circuit provided by an embodiment of the present application; Figure 5 Another structural diagram of the combining control circuit provided by the embodiment of the present application; Figure 6 It is a schematic diagram of the hardware structure of the computer device according to the embodiment of the present invention. Detailed implementation manners

[0013] Next, the technical solutions in the embodiments of the present application will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the protection scope of the present application.

[0014] It should be noted that in the description of the present application, the terms "include", "comprise" or any other variation thereof are intended to cover a non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article or device. The terms "first", "second", etc. in the present application are used to distinguish similar objects and are not used to describe a specific order or sequence.

[0015] In order to enable those skilled in the art of the present technology to better understand the solution of the present application, the present application will be further described in detail below in conjunction with the accompanying drawings and specific implementation manners.

[0016] In many systems with high requirements for power supply reliability, such as servers, communication devices, etc., the ORing circuit (commonly used to prevent power backflow, and the basic form includes diode and MOS transistor solutions) is often used to implement redundant backup of dual power supplies or multiple power supplies. It can connect multiple power inputs. When one of the power supplies fails or the voltage is abnormal, the ORing circuit can automatically switch the load to other normally operating power supplies to ensure that the system continuously obtains stable power supply and avoid equipment downtime caused by a single power supply failure.

[0017] For the ORing circuit based on boost boost, when the boost circuit stops working completely or is abnormal, there is still a residual voltage in the combined output voltage VOUT and it cannot be truly turned off. The reason is that there is a freewheeling diode in the boost boost circuit topology, such as Figure 1As shown, when the first boost controller stops working, the voltage Vboost1 does not drop to 0V. Due to the effect of D1, Vboost1 is equal to the input voltage VIN1 (ignoring the diode voltage drop). Similarly, when the second boost controller stops working, the voltage Vboost2 is equal to the input voltage VIN2 (ignoring the diode voltage drop). After the two boost circuits stop working due to being disabled or abnormal conditions, VOUT can still draw power from the higher of VIN1 and VIN2, and cannot be truly turned off. Moreover, since its voltage is lower than the normal voltage when the boost circuit is working, it may damage the subsequent circuit, greatly reducing the reliability of the power supply.

[0018] In addition, when there are more than two boost branches, after the multiple boost branches stop working due to being disabled or abnormal conditions, VOUT can still draw power from the higher of the power input terminals of the multiple boost branches and cannot be truly turned off. Moreover, since its voltage is lower than the normal voltage when the boost circuit is working, it may damage the subsequent circuit. Also, when there is one boost branch, after the boost branch stops working due to being disabled or abnormal conditions, VOUT can still draw power from the power input terminal of this boost branch and cannot be truly turned off. Moreover, since its voltage is lower than the normal voltage when the boost circuit is working, it may damage the subsequent circuit.

[0019] When the input power supply voltage is lower than the voltage required by the load, functional abnormalities and performance degradation may occur, including logical errors. For example, digital circuits (such as CPUs, memories) may experience signal level unrecognizability due to insufficient power supply, resulting in system crashes, resets, or data loss. It also includes the situation of insufficient driving ability. For example, the output amplitude of analog circuits (such as operational amplifiers, sensors) decreases, the signal-to-noise ratio deteriorates, and the accuracy decreases. Another example is that insufficient reference voltage of the ADC may cause sampling value distortion. It also includes the situation of power device failure. For example, loads such as motors and LEDs may have insufficient torque and reduced brightness due to undervoltage, and may even fail to start (such as motor stalling and burning out the windings).

[0020] There may also be risks of hardware damage, including overcurrent heating. Since the switching power supply may continuously increase the duty cycle to compensate for the output voltage, resulting in overcurrent heating of the MOSFET / inductor, and when the voltage difference of the linear regulator is too large, the efficiency drops suddenly, leading to thermal runaway. It also includes battery over-discharge. Since lithium batteries will accelerate electrode aging and even cause copper dendrite short circuits (at this time, the risk level is high) when deeply discharged under undervoltage. It also includes reverse current. Since some DC-DC circuits may experience current backflow when the input voltage suddenly drops, damaging the input source (such as solar panel reverse power feeding).

[0021] System-level risks may also occur, including misoperation of the protection circuit. For example, undervoltage lock out (UVLO) may be triggered repeatedly, causing the device to restart frequently and impacting the circuit reliability. It also includes cascading failures. For example, a voltage drop at a certain node in the power grid may cause downstream devices to disconnect from the network collectively (such as a large area of photovoltaic inverters going offline). It also includes the loss of safety redundancy. For example, an emergency system (such as a fire alarm) cannot be activated under undervoltage, violating safety standards.

[0022] To solve the above problems, an embodiment of the present application provides a combining control circuit, as Figure 2 shown. The combining control circuit is connected to multiple boost branches and includes: A status detection module 10. The input ends of the status detection module 10 are respectively connected to each boost branch, and are used to collect the operation information of each boost branch, judge the working status of all boost branches based on the operation information, and output a switch signal based on the working status of all boost branches; A switch module 20. The switch module 20 is connected to the status detection module 10 and is arranged between the output ends of each boost branch and the power supply output end VOUT, and is used to receive the switch signal and disconnect or establish the connection between the output end of the boost branch and the power supply output end VOUT based on the switch signal.

[0023] Optionally, the working status of all boost branches includes: all boost branches are in an abnormal working state and any one boost branch is in a normal working state. The switch signal includes: a turn-off signal and a closure signal.

[0024] Specifically, referring to Figure 2 , the multiple boost branches are respectively K1 to KN, and the power supply input ends are respectively VIN1 to VINN. Each boost branch respectively receives the input end voltage, and after being boosted under the control of the boost controller, outputs. The voltages respectively output by each boost branch are combined into one path and used as the combined voltage VOUT_R. Optionally, the working status includes a normal working state and an abnormal working state. The operation information includes the start information and boost information of the boost branch. The abnormal work includes an abnormal working state or a non-started working state.

[0025] It should be noted that the boost branch includes an inductor, a diode, an anti-backflow switch tube, a boost controller and an anti-backflow control circuit. Referring to Figure 2 , the inductors are respectively L1 to LN, and the diodes are respectively D1 to DN, and the anti-backflow switch tubes are respectively Q1 to QN.

[0026] Specifically, the switch module 20 is respectively connected to the output ends of each boost branch and is used to receive the combined voltage VOUT_R. Optionally, the switch module 20 can be a switching device for receiving the switch signal and conducting or disconnecting the connection.

[0027] The multiplexing control circuit provided by the present invention respectively detects the voltage working states of each boost branch through the state detection module 10, and outputs a switching signal based on the working states of all the boost branches. The switching module 20 receives the switching signal and disconnects or conducts the connection between the output ends of each boost branch and the power output end VOUT. Compared with the traditional boost circuit, the present application can, based on the working states of all the boost branches, disconnect or connect the output ends of each boost branch to the power output end VOUT, so as to prevent the voltage at the power input end from being output to the power output end VOUT when all the boost branches are in an abnormal working state, or when all the boost branches are not started, or when some of the boost branches are in an abnormal working state and some of the boost branches are not started. As a result, the power output end VOUT is not truly turned off, causing the voltage at the power input end to be directly transmitted to the subsequent circuit without being boosted, resulting in the output voltage being lower than the requirement and damaging the subsequent circuit. At the same time, there is still a problem that the voltage at the input end is transmitted to the power output end when all the boost branches are turned off and not working. Therefore, the effect of truly turning off the power at the output end and protecting the subsequent circuit is achieved, and the power supply reliability is greatly improved.

[0028] It should be noted that the multiplexing control circuit provided in this embodiment is not only applicable to the boost circuit in the related art as Figure 1 shown, but can be applicable to any boost circuit. The boost circuit includes multiple boost branches such as two boost branches or three boost branches, or the boost circuit includes one boost branch. When the boost circuit only includes multiple boost branches, since the voltage at the power input end is still transmitted to the load after the boost controller is turned off, or in the case of abnormal operation, the voltage at the input end is still output from the power output end and transmitted to the subsequent load through the power output end. At this time, when all the boost branches are not working properly, the state detection module 10 and the switching module 20 disconnect the connection between the output end of the boost branch and the power output end. When the boost circuit only includes one boost branch, since the voltage at the power input end is still transmitted to the load after the boost controller is turned off, or in the case of abnormal operation, the voltage at the input end is still output from the power output end and transmitted to the subsequent load through the power output end. At this time, when the boost branch is not working, the state detection module 10 and the switching module 20 disconnect the connection between the output end of the boost branch and the power output end.

[0029] Such as Figure 1 shown in the boost circuit in the related art, it may further include an anti-backflow control circuit for preventing the voltage at the power output end or the voltage of other boost branches from flowing back to the input end, causing a power failure problem.

[0030] In some feasible embodiments, the status detection module 10 is configured to output a turn-off signal when it detects that all the boost branches are in an abnormal working state; The switch module 20 is configured to receive the turn-off signal and disconnect the connection between the output ends of the boost branches and the power output end VOUT.

[0031] Specifically, the status detection module 10 is configured to detect the working state of each boost branch. When it detects that all the boost branches are in an abnormal working state, it outputs a turn-off signal, causing the switch module 20 to disconnect the connection between the output ends of the boost branches and the power output end VOUT.

[0032] In addition, when the status detection module 10 detects that any one of the boost branches is in a normal working state, it outputs a closing signal. After receiving the closing signal, the switch module 20 conducts the connection between the output ends of the boost branches and the power output end VOUT.

[0033] It should be noted that when all the boost branches are in an abnormal working state, or when all the boost branches are not started, or when some of the boost branches are in an abnormal working state and some of the boost branches are not started, the combined voltage VOUT_R will take the maximum value among the multiple power input ends. That is, the combined voltage VOUT_R is the maximum value among the power input ends minus the voltage drop of the diode D1, which is equivalent to that all the boost branches are not working, and there is still a residual voltage in the combined voltage VOUT_R.

[0034] In some feasible embodiments, as Figure 3 shown, the status detection module 10 includes: Multiple branch status judgment units 11, each branch status judgment unit 11 is respectively connected to the working state terminal of each boost branch, and is configured to judge whether each boost branch is in an abnormal working state and output a judgment result; A detection unit 12, the input end of the detection unit 12 is respectively connected to the output ends of the multiple branch status judgment units, and is configured to receive the judgment result and detect whether all the boost branches are in an abnormal working state. When it detects that all the boost branches are in an abnormal working state, it outputs a turn-off signal.

[0035] Specifically, each branch status judgment unit 11 receives the working state of each boost branch, judges whether the boost branch is in an abnormal working state based on the working state, and sends the judgment result to the detection unit 12. Optionally, the multiple branch status judgment units 11 can be respectively logic judgment units. By performing logical judgment, it is detected whether the boost branch is in an abnormal working state.

[0036] Specifically, the detection unit 12 is configured to receive the judgment result and confirm whether each boost branch is in an abnormal working state. If it is detected that each boost branch is in an abnormal working state, it indicates that each boost branch is in a non-operating state or an abnormal state. At this time, a turn-off signal is output to disconnect the connection between the output end of each boost branch and the power output end VOUT. Optionally, the detection unit 12 can be a logic judgment unit. By performing logical judgment, it is detected whether each boost branch is in an abnormal working state.

[0037] In some feasible embodiments, the branch state judgment unit 11 is configured to respectively determine whether each boost branch is in an abnormal working state based on the control signal of the boost branch and the feedback signal of the boost branch.

[0038] Specifically, the control signal of the boost branch is the signal output by the control chip to the boost controller, which is used to control the boost branch to perform boosting. After receiving the control signal, the boost branch boosts the voltage at the power input end and then outputs it. The feedback signal of the boost branch is the signal output by the boost controller, which is used to feedback the signal based on the boosting situation after controlling the boost branch to perform boosting. Refer to Figure 2 , the feedback signals of the boost branches are respectively the first feedback signal to the Nth feedback signal. When Vboost1 boosts to the first target voltage value, the first feedback signal is output, and when VboostN boosts to the Nth target voltage value, the Nth feedback signal is output. The control signals of the boost branches are respectively the first control signal to the Nth control signal. The branch state judgment unit 11 determines the working state of the boost branch based on the control signal and the feedback signal.

[0039] It should be noted that the control chip is the main chip that controls each boost controller, and controls each boost controller based on a preset control method.

[0040] It can be understood that the branch state judgment unit 11 can also add other operating information and can also include other operating information, such as current or voltage stability conditions, etc. For example, by detecting the current, when the detected current is greater than the preset current threshold, or by calculating the current value through voltage and resistance, when the detected current is greater than the current value, it is confirmed that the boost branch is in an abnormal working state. For example, when it is detected that the boosted voltage is not stable, it is confirmed that the boost branch is in an abnormal working state. Specifically, it is judged whether the boost branch is working normally according to the actual application situation.

[0041] In some feasible embodiments, the branch state judgment unit 11 is further configured to respectively determine whether each boost branch is in an abnormal working state based on the control signal of the boost branch, the feedback signal of the boost branch, and the output voltage signal of the boost branch.

[0042] Specifically, the combining control circuit further includes a voltage detection circuit. The voltage detection circuit is connected to the output end of the boost branch and is used to detect the output voltage of the boost branch respectively. It should be noted that since the boost controller detects the voltage between the diode and the anti-backflow control switch, and in fact, the anti-backflow control switch may have faults such as open circuit. Therefore, by detecting whether the output voltage of the boost branch is a preset value, or detecting whether the output voltage of the boost branch is the same as the voltage detected by the boost controller, the working state of the boost branch can be judged. That is to say, the branch state judgment unit 11 is also used to judge whether there are abnormal working conditions in each boost branch respectively based on the control signal of the boost branch, the feedback signal of the boost branch and the output voltage signal of the boost branch.

[0043] In addition, the branch state judgment unit 11 is also used to judge whether each boost branch is in an abnormal working state respectively based on the control signal of the boost branch, the feedback signal of the boost branch and the combining voltage signal of the boost branch.

[0044] Specifically, the voltage detection circuit can also be connected to the combined boost circuit. That is to say, the voltage detection circuit collects the combined voltage VOUT_R and detects whether the combined voltage VOUT_R is a preset value, or detects whether the combined voltage VOUT_R is the same as the value obtained by adding the voltages detected by each boost controller, so as to judge the working state of the boost branch. That is to say, based on the control signal of the boost branch, the feedback signal of the boost branch and the combining voltage signal of the boost branch respectively, it is judged whether there are abnormal working conditions in each boost branch, thus greatly improving the reliability of control.

[0045] It should be noted that the branch state judgment unit 11 is also used to judge whether each boost branch is in an abnormal working state based on multiple other input signals. It is not limited to judging based on the control signal of the boost branch, the feedback signal of the boost branch and the output voltage signal of the boost branch.

[0046] In addition, after the branch state judgment unit 11 receives multiple input signals, among the multiple input signals, a preset number of input signals are selected, and based on the selected inputs, it is judged whether each boost branch is in an abnormal working state. The preset number is more than two. For example, among the control signal of the boost branch, the feedback signal of the boost branch and the output voltage signal of the boost branch, the control signal of the boost branch and the output voltage signal of the boost branch are selected, and based on the control signal of the boost branch and the output voltage signal of the boost branch, it is judged whether each boost branch is in an abnormal working state. It should be noted that the selected signals for each boost branch can be different.

[0047] In some feasible embodiments, such as Figure 4 shown, the branch state judgment unit 11 includes: An AND gate AND, the first input terminal of the AND gate AND is connected to the control signal terminal of the boost branch, the second input terminal of the AND gate AND is connected to the feedback signal terminal of the boost branch, and the output terminal of the AND gate AND is connected to the detection unit 12.

[0048] Specifically, referring to Figure 4 , the control signals of each boost branch are respectively EN1 to ENN, the boost controller receives the control signals, and when the control signals are at a high level, the boost controller starts to work.

[0049] Specifically, referring to Figure 4 , the feedback signal terminals of each boost branch are respectively PWGD1 to PWGDN, the boost controller detects the voltage at the output terminal of the boost branch, and after the boost controller adjusts the output voltage to the target value, it sets the feedback signal to high, that is, outputs a high level.

[0050] Specifically, the first input terminal of the AND gate AND is connected to the output terminal of the control chip, and the control signal is specifically an enable signal. The second input terminal of the AND gate AND is connected to the feedback signal terminal of the boost controller. The AND gate AND outputs a high level when it receives the corresponding control signal and feedback signal and both the control signal and the feedback signal are at a high level, that is, the boost branch is in a normal working state. That is to say, when both the control signal and the feedback signal are at a high level, it is confirmed that the boost branch is controlled, and the boost branch boosts the voltage at the power input terminal to the target value. At this time, it is determined that the boost branch is in a normal working state. When the control signal and / or the feedback signal is at a low level, a low level is output, that is, the boost branch is in an abnormal working state. That is to say, when the control signal and / or the feedback signal is at a low level, it is confirmed that the boost branch is not controlled, so that the boost branch does not work, or the boost branch is controlled, but the boost branch does not boost the voltage at the power input terminal to the target value. At this time, it is determined that the boost branch is in an abnormal working state.

[0051] Specifically, in some other feasible embodiments, the branch state judgment unit 11 is further configured to respectively determine whether each boost branch is in an abnormal working state based on the control signal of the boost branch, the feedback signal of the boost branch, and the output voltage signal of the boost branch. At this time, the AND gate AND includes three input terminals and one output terminal. The first input terminal is connected to the control signal terminal of the boost branch, the second input terminal is connected to the feedback signal terminal of the boost branch, and the third input terminal is connected to the output voltage signal terminal of the boost branch. A logical operation of "AND" is performed on the three input signals. It should be noted that the branch state judgment unit 11 can also be a controller that performs a logical operation of "AND" on the three input terminals.

[0052] Exemplarily, when the AND gate receives the corresponding control signal, feedback signal, and output voltage signal, and all of the control signal, feedback signal, and output voltage signal are at a high level, a high level is output, that is, the boost branch is in a normal working state. That is to say, when the control signal, feedback signal, and output voltage signal are all at a high level, it is confirmed that the boost branch is controlled, and the boost branch boosts the voltage at the power input terminal to the target value. At this time, it is determined that the boost branch is in a normal working state. When the control signal, output voltage signal, and / or feedback signal is at a low level (that is, any one of the control signal, output voltage signal, or feedback signal is at a low level), a low level is output, that is, the boost branch is in an abnormal working state. That is to say, when the control signal, output voltage signal, and / or feedback signal is at a low level, it is confirmed that the boost branch is not controlled, so that the boost branch does not work, or the boost branch is controlled, but the boost branch does not boost the voltage at the power input terminal to the target value. At this time, it is determined that the boost branch is in an abnormal working state.

[0053] In some feasible embodiments, as Figure 4 shown, the detection unit 12 includes: an OR gate, and the input terminals of the OR gate are respectively connected to the output terminals of a plurality of branch state determination units 11.

[0054] Specifically, the OR gate respectively obtains the working state of each boost branch. When it is detected that all boost branches are in an abnormal working state, a turn-off signal is output. When it is detected that any boost branch is in a normal working state, a closing signal is output. It should be noted that the number of input terminals of the OR gate is not less than the number of boost branches.

[0055] It should be noted that the detection unit 12 can also be a controller that performs a logical "OR" operation.

[0056] Exemplarily, the OR gate receives the level signals output by the AND gates of each boost branch. If at least one of the level signals output by the AND gates is a high level, a high level signal is output to the switch module 20, causing the switch module 20 to establish a connection between the output end of the boost branch and the power output end. Thus, at least one boost branch in a normal operating state boosts the voltage at the power input end and transmits it to the power output end VOUT. If all the level signals output by the AND gates are low levels, a low level signal is output to the switch module 20, causing the switch module 20 to disconnect the output end of the boost branch from the power output end VOUT, so as to prevent the voltage at the power input end from being output to the power output end VOUT when all the boost branches are in an abnormal operating state, or when all the boost branches are not started, or when some of the boost branches are in an abnormal operating state and some of the boost branches are not started. Thus, the power output end VOUT is not truly turned off, resulting in the voltage at the power input end being directly transmitted to the subsequent circuit without being boosted, causing the output voltage to be lower than the requirement and damaging the subsequent circuit.

[0057] In some feasible embodiments, such as Figure 3 shown, the switch module 20 includes: A control unit 21, which is connected to the state detection module 10, is configured to receive a shutdown signal and output a disconnection control signal; A switch unit 22, which is connected to the control unit 21 and is disposed between the output end of each boost branch and the power output end, is configured to receive the disconnection control signal and disconnect the connection between the output end of each boost branch and the power output end VOUT.

[0058] Specifically, the control unit 21 is a driving device, that is, it is used to drive the switch unit 22 to act. The control unit 21 receives the shutdown signal and outputs a disconnection control signal, and the disconnection control signal is a disconnection driving signal.

[0059] Specifically, the switch unit 22 is a switching device that disconnects the connection after receiving the shutdown signal and connects after receiving the closing signal.

[0060] In some feasible embodiments, the switch module 20 further includes: A control unit 21, which is connected to the state detection module 10, is configured to receive a shutdown signal and output a disconnection control signal; Multiple switch units 22, each switch unit 22 is connected to the control unit 21, the first end of the switch unit 22 is connected to the output end of the boost branch, and the second ends of each switch unit are connected and connected to the power output end.

[0061] Specifically, multiple switch units 22 are respectively arranged at the output ends of the boost branches. Optionally, the first ends of the switch units 22 are respectively connected to the boost switching transistors, and the second ends of the switch units 22 are combined and connected to the power output terminal VOUT. That is to say, the output ends of the boost branches are combined after passing through the switch units 22 respectively. It should be noted that when the state detection module 10 detects that all the boost branches are in abnormal operation, it outputs shutdown signals respectively. After receiving the shutdown signals, the switch units 22 disconnect the connection between the power input terminal and the power output terminal, thereby preventing the voltage at the power input terminal from being output to the power output terminal VOUT when all the boost branches are in an abnormal working state, or when all the boost branches are not started, or when some of the boost branches are in an abnormal working state and some of the boost branches are not started.

[0062] It should be noted that the switch unit 22 can be connected between the diode and the boost switching transistor, or between the boost switching transistor and the output end of the boost branch. In multiple boost branches, the connection positions of each switch unit 22 can be different. For example, in the first boost branch, the switch unit 22 can be connected between the diode and the boost switching transistor, and in the second boost branch, the switch unit 22 can be connected between the boost switching transistor and the output end of the boost branch.

[0063] In some feasible embodiments, the control unit 21 includes: A gate driver, which is respectively connected to the switch unit and the state detection module.

[0064] Specifically, the control unit 21 can be a gate driver for driving the switch unit 22, and the switch unit 22 includes a gate.

[0065] In some feasible embodiments, as Figure 5 shown, the switch unit 22 includes: A field effect transistor S1, the control end of the field effect transistor S1 is connected to the control unit 21, the first end of the field effect transistor S1 is connected to the output ends of the boost branches, and the second end of the field effect transistor S1 is connected to the power output terminal.

[0066] Specifically, the output ends of the boost branches are combined into VOUT_R. Optionally, the field effect transistor S1 can be an NMOS transistor (N-Metal-Oxide-Semiconductor).

[0067] It should be noted that referring to Figure 5, the field effect transistor S1 also includes a diode. The cathode of the diode in the field effect transistor S1 is connected to the output ends of multiple boost branches, and the anode of the diode in the field effect transistor S1 is connected to the power output terminal VOUT. Thus, when the field effect transistor S1 is turned off or on, the voltage at the output ends of the multiple boost branches is transmitted to the power output terminal VOUT.

[0068] In some feasible embodiments, the switching unit 22 includes: Multiple field effect transistors, the control terminals of each field effect transistor are respectively connected to the control unit 21, the first ends of each field effect transistor connected in sequence are connected to the output ends of each boost branch, and the second ends of each field effect transistor connected in sequence are connected to the power output terminal.

[0069] Specifically, by setting multiple field effect transistors (not shown in the figure), the control stability is improved.

[0070] Exemplarily, as long as one set of the N boost branches works normally, it means that its control signal and feedback signal are high levels. After logical AND operation, it is still a high level. After OR gate OR logical operation, the output switch signal is a high level, so that the gate driver drives the NMOS transistor to conduct, and the combined voltage VOUT_R supplies power to the subsequent load.

[0071] It should be noted that multiple field effect transistors can be respectively arranged in each boost branch. That is to say, the number of multiple field effect transistors is the same as the number of boost branches, and they are arranged after the anti-backflow switch transistors. Each boost branch is combined after passing through its respective field effect transistor. The state detection module 10 respectively detects the working states of each boost branch. In the circuit where the working state of the boost branch is detected to be abnormal, it controls the corresponding field effect transistors of each boost branch to be turned off. It should be noted that at this time, the state detection module 10 only includes an AND gate and does not include an OR gate. That is, after the state detection module 10 respectively obtains the operation information of each boost branch, it judges the working state corresponding to the operation information, and directly sends the switch signal corresponding to the working state to the corresponding field effect transistor through the control unit 21. However, this solution requires a large number of field effect transistors and is more complex in structure than a single field effect transistor, increasing the volume.

[0072] In some feasible embodiments, as Figure 5 shown, each field effect transistor S1 is reversely connected in parallel with a diode.

[0073] Specifically, the positive electrode of the diode connected in parallel with the field effect transistor S1 is connected to the power output terminal VOUT, and the negative electrode of the diode connected in parallel with the field effect transistor S1 is connected to the output ends of each boost path. Refer to Figure 5, the negative electrode of the diode is connected to the boosted path of the combined path. Thus, when the field effect transistor S1 is turned off, the voltage at the power input terminal will not be transmitted to the power output terminal VOUT through this diode.

[0074] The embodiment of the present application also provides a boost circuit. The boost circuit includes multiple boost branches and the combined path control circuit as above. The boost branch may further include an anti-backflow control circuit for preventing the voltage at the power output terminal or the voltage of other boost branches from flowing back to the input terminal, causing a power failure problem. The boost circuit of this embodiment can, based on the working states of all boost branches, disconnect or connect the output terminals of each boost branch to the power output terminal VOUT, so as to prevent the voltage at the power input terminal from being output to the power output terminal VOUT when all boost branches are in an abnormal working state, or when all boost branches are not started, or when some boost branches are in an abnormal working state and some other boost branches are not started. Thus, the problem that the power output terminal VOUT is not truly turned off, resulting in the voltage at the power input terminal being directly transmitted to the subsequent circuit without being boosted, causing the output voltage to be lower than the requirement and damaging the subsequent circuit, and at the same time, when all boost branches are turned off and not working, there is still a problem that the voltage at the input terminal is transmitted to the power output terminal. Thus, the effect of truly turning off the power at the output terminal and protecting the subsequent circuit is achieved, and the power supply reliability is greatly improved.

[0075] The embodiment of the present application also provides a control method for the combined path control circuit. The control method for the combined path control circuit is applied to the combined path control circuit as above, and includes: Step 1, collect the operation information of each boost branch, and judge the working states of all boost branches based on the operation information; Step 2, disconnect or establish the connection between the output terminal of the boost branch and the power output terminal based on the working states of all boost branches.

[0076] Specifically, refer to Figure 2 , the multiple boost branches are respectively K1 to KN, and the power input terminals are respectively VIN1 to VINN. Each boost branch respectively receives the input terminal voltage and is controlled by the boost controller to perform boosting and then output. The voltages respectively output by each boost branch are combined into one path and used as the combined path voltage VOUT_R. Optionally, the working state includes a normal working state and an abnormal working state. The operation information includes the start information and boost information of the boost branch. The abnormal working includes an abnormal working state or a non-started working state.

[0077] It should be noted that the boost branch includes an inductor, a diode, a boost switch tube, a boost controller and an anti-backflow control circuit. Refer to Figure 2 , the inductors are respectively L1 to LN, and the diodes are respectively D1 to DN, and the boost switch tubes are respectively Q1 to QN.

[0078] Specifically, the switch module 20 is respectively connected to the output ends of each boost branch for receiving the combined voltage VOUT_R. Optionally, the switch module 20 can be a switching device for receiving a switching signal and conducting or disconnecting the connection.

[0079] Specifically, by detecting the voltage working states of each boost branch and outputting a switching signal based on the working states of all boost branches, and disconnecting or conducting the connection between the output ends of each boost branch and the power output end VOUT. Compared with the traditional boost circuit, the present application can, based on the working states of all boost branches, disconnect or connect the output ends of each boost branch to the power output end VOUT to prevent the voltage at the power input end from being output to the power output end VOUT when all boost branches are in an abnormal working state, or when all boost branches are not started, or when some boost branches are in an abnormal working state and some other boost branches are not started. Thus, the power output end VOUT is not truly turned off, resulting in the voltage at the power input end being directly transmitted to the subsequent circuit without boosting, causing the output voltage to be lower than the requirement and damaging the subsequent circuit. At the same time, there is also a problem that the voltage at the input end is still transmitted to the power output end when all boost branches are turned off and not working. Thus, the effect of truly turning off the power at the output end and protecting the subsequent circuit is achieved, and the reliability of power supply is greatly improved.

[0080] In some feasible embodiments, step two includes the following steps: Step (1), detecting whether all boost branches are in an abnormal working state; Step (2), when it is detected that all boost branches are in an abnormal working state, disconnecting the connection between the output end of the boost branch and the power output end.

[0081] Specifically, the working state of each boost branch is detected. When it is detected that all boost branches are in an abnormal working state, a turn-off signal is output, so that the switch module 20 disconnects the connection between the output ends of each boost branch and the VOUT of the power output end.

[0082] In addition, when it is detected that any one of the boost branches is in a normal working state, a closing signal is output. After receiving the closing signal, the switch module 20 conducts the connection between the output ends of each boost branch and the power output end VOUT.

[0083] It should be noted that when all the boost branches are in an abnormal working state, or when all the boost branches are not started, or when some of the boost branches are in an abnormal working state and some of the boost branches are not started, the combined voltage VOUT_R will take the maximum value among multiple power input terminals. That is, the combined voltage VOUT_R is the maximum value among the power input terminals minus the voltage drop of the diode D1, which is equivalent to all the boost branches not working, and the combined voltage VOUT_R still has a residual voltage.

[0084] Specifically, the connection between the combined output of the output terminals of the boost branches and the power output terminal can be disconnected, and the output terminals of each boost branch can also be disconnected separately. That is to say, the output terminals of each boost path are combined after passing through the switching unit respectively. It is worth noting that when it is detected that all the boost branches are in an abnormal working state, a shutdown signal is output respectively. After each switching unit receives the shutdown signal, the connection between the power input terminal and the power output terminal is disconnected, so as to prevent the voltage of the power input terminal from being output to the power output terminal VOUT when all the boost branches are in an abnormal working state, or when all the boost branches are not started, or when some of the boost branches are in an abnormal working state and some of the boost branches are not started.

[0085] In some feasible embodiments, Step 1 includes the following steps: Step (1), obtaining the control signal and feedback signal of each boost branch; Step (2), when it is detected that the control signal is not an enable signal, and / or when it is detected that the feedback signal is not a boost signal, it is confirmed that the boost branch is in an abnormal working state.

[0086] Specifically, when the control signal is at a high level, it is confirmed that the control signal is an enable signal. When the feedback signal is at a high level, it is confirmed that the feedback signal is a boost signal. When it is detected that the control signal is at a low level, and / or when it is detected that the feedback signal is at a high level, it is confirmed that the boost branch is in an abnormal working state.

[0087] Specifically, the AND gate and the OR gate in the combining control circuit can be used to confirm that the boost branch is in an abnormal working state. Specifically, the first input terminal of the AND gate is connected to the output terminal of the control chip, and the control signal is specifically an enable signal. The second input terminal of the AND gate is connected to the feedback signal terminal of the boost controller. When the AND gate receives the corresponding control signal and feedback signal, and both the control signal and the feedback signal are at a high level, it outputs a high level, indicating that a boost branch is in a normal working state. That is to say, when both the control signal and the feedback signal are at a high level, it is confirmed that the boost branch is controlled, and the boost branch boosts the voltage of the power input terminal to the target value. At this time, it is determined that the boost branch is in a normal working state. When the control signal and / or the feedback signal is at a low level, it outputs a low level, indicating that a boost branch is in an abnormal working state. That is to say, when the control signal and / or the feedback signal is at a low level, it is confirmed that the boost branch is not controlled, so that the boost branch does not work, or the boost branch is controlled, but the boost branch does not boost the voltage of the power input terminal to the target value. At this time, it is determined that the boost branch is in an abnormal working state.

[0088] Specifically, the OR gate obtains the working states of each boost branch respectively. When it detects that all boost branches are in an abnormal working state, it outputs a turn-off signal. When it detects that any boost branch is in a normal working state, it outputs a closing signal. It should be noted that the number of input terminals of the OR gate is not less than the number of boost branches.

[0089] Exemplarily, the OR gate receives the level signals output by the AND gates of each boost branch. If at least one of the level signals output by the AND gates is at a high level, it is confirmed that all boost branches are in a normal working state. If all the level signals output by the AND gates are at a low level, it is confirmed that all boost branches are in an abnormal working state.

[0090] In some feasible embodiments, step one may further include the following steps: Step (1): Obtain the control signal, feedback signal, and output voltage signal of each boost branch; Step (2): When it is detected that the control signal is not an enable signal, the feedback signal is not a boost signal, and / or the output voltage signal is not a preset voltage signal, confirm that the boost branch is in an abnormal working state.

[0091] Specifically, the combining control circuit further includes a voltage detection circuit. The voltage detection circuit is connected to the output end of the boost branch and is used to detect the output voltage of the boost branch respectively. It should be noted that since the boost controller detects the voltage between the diode and the anti-backflow control switch, and in fact, there may be faults such as open circuit in the anti-backflow control switch. Therefore, by detecting whether the output voltage of the boost branch is a preset value, or detecting whether the output voltage of the boost branch is the same as the voltage detected by the boost controller, thereby, the working state of the boost branch is judged. That is to say, based on the control signal of the boost branch, the feedback signal of the boost branch, and the output voltage signal of the boost branch respectively, it is judged whether there is an abnormal working condition in each boost branch, thereby greatly improving the reliability of the control.

[0092] In addition, the branch state judgment unit is further used to judge whether each boost branch is in an abnormal working state based on the control signal of the boost branch, the feedback signal of the boost branch, and the combining voltage signal of the boost branch respectively.

[0093] Specifically, the voltage detection circuit can also be connected to the combined boost circuit. That is to say, the voltage detection circuit collects the combined voltage VOUT_R and detects whether the combined voltage VOUT_R is a preset value, or detects whether the combined voltage VOUT_R is the same as the value obtained by adding the voltages detected by each boost controller, thereby, the working state of the boost branch is judged. That is to say, based on the control signal of the boost branch, the feedback signal of the boost branch, and the combined voltage signal of the boost branch respectively, it is judged whether there is an abnormal working condition in each boost branch, thereby greatly improving the reliability of the control.

[0094] It should be noted that the branch state judgment unit 11 is further used to judge whether each boost branch is in an abnormal working state based on multiple other input signals. It is not limited to judging based on the control signal of the boost branch, the feedback signal of the boost branch, and the output voltage signal of the boost branch.

[0095] In addition, after the branch state judgment unit 11 receives multiple input signals, among the multiple input signals, a preset number of input signals are selected, and based on the selected inputs, it is judged whether each boost branch is in an abnormal working state. The preset number is more than two. For example, among the control signal of the boost branch, the feedback signal of the boost branch, and the output voltage signal of the boost branch, the control signal of the boost branch and the output voltage signal of the boost branch are selected, and based on the control signal of the boost branch and the output voltage signal of the boost branch, it is judged whether each boost branch is in an abnormal working state. It should be noted that the selected signals for each boost branch can be different.

[0096] Exemplarily, when the AND gate receives the corresponding control signal, feedback signal, and output voltage signal, and the control signal, feedback signal, and output voltage signal are all at high level, it outputs a high level, that is, the boost branch is in a normal working state. That is to say, when the control signal, feedback signal, and output voltage signal are all at high level, it is confirmed that the boost branch is controlled, and the boost branch boosts the voltage at the power input end to the target value. At this time, it is determined that the boost branch is in a normal working state. When the control signal, output voltage signal, and / or feedback signal is at low level (that is, any one of the control signal, output voltage signal, or feedback signal is at low level), it outputs a low level, that is, the boost branch is in an abnormal working state. That is to say, when the control signal, output voltage signal, and / or feedback signal is at low level, it is confirmed that the boost branch is not controlled, so that the boost branch does not work, or the boost branch is controlled, but the boost branch does not boost the voltage at the power input end to the target value. At this time, it is determined that the boost branch is in an abnormal working state.

[0097] Through the description of the above embodiments, those skilled in the art can clearly understand that the method according to the above embodiments can be implemented by means of software plus a necessary general hardware platform. Of course, it can also be implemented by hardware, but in many cases, the former is a better implementation method.

[0098] An embodiment of the present application also provides an electronic device, such as Figure 6 shown, including a memory A1 and a processor A2. A computer program is stored in the memory A1, and the processor A2 is configured to run the computer program to execute the steps in any one of the embodiments of the control method of the above-mentioned combining control circuit.

[0099] An embodiment of the present application also provides a computer-readable storage medium, in which a computer program is stored. Wherein, the computer program is configured to execute the steps in any one of the embodiments of the control method of the above-mentioned combining control circuit when running.

[0100] In an exemplary embodiment, the above computer-readable storage medium may include, but is not limited to: USB flash drive, read-only memory (abbreviated as ROM), random access memory (abbreviated as RAM), mobile hard disk, magnetic disk, or optical disc and other various media that can store computer programs.

[0101] An embodiment of the present application also provides a computer program product. The above computer program product includes a computer program, and when the computer program is executed by a processor, it implements the steps in any one of the embodiments of the control method of the above-mentioned combining control circuit.

[0102] Embodiments of the present application also provide another computer program product, including a non-volatile computer-readable storage medium storing a computer program, and the computer program, when executed by a processor, implements the steps in any of the above-described control method embodiments of the combining circuit control circuit.

[0103] Those skilled in the art can further realize that the units and algorithm steps of each example described in combination with the embodiments disclosed herein can be implemented by electronic hardware, computer software, or a combination of both. To clearly illustrate the interchangeability of hardware and software, the components and steps of each example have been generally described according to functions in the above description. Whether these functions are executed in a hardware or software manner depends on the specific application and design constraints of the technical solution. Skilled professionals can use different methods to implement the described functions for each specific application, but such implementation should not be considered to exceed the scope of the present application.

[0104] The above has introduced in detail a combining circuit control circuit, its control method, device, medium, and product provided by the present application. Specific examples are used herein to illustrate the principle and implementation manner of the present application. The description of the above embodiments is only used to help understand the method and its core idea of the present application. It should be noted that for those of ordinary skill in the art in the technical field, without departing from the principle of the present application, several improvements and modifications can be made to the present application, and these improvements and modifications also fall within the protection scope of the claims of the present application.

Claims

1. A combiner control circuit, characterized in that, The combining control circuit is connected to one or more boosting branches, and the combining control circuit includes: A status detection module, the input end of the status detection module is respectively connected to each boosting branch, and is used for collecting the operation information of each boosting branch, judging the working status of all boosting branches based on the operation information, and outputting a switching signal based on the working status of all boosting branches; A switching module, the switching module is connected to the status detection module and is arranged between the output end of each boosting branch and the power supply output end, and is used for receiving the switching signal and disconnecting or establishing the connection between the output end of the boosting branch and the power supply output end based on the switching signal; The status detection module is used for outputting a turn-off signal when it detects that all boosting branches are in an abnormal working state; The switching module is used for receiving the turn-off signal and disconnecting the connection between the output end of each boosting branch and the power supply output end; The status detection module includes: a plurality of branch status judgment units; The branch status judgment unit is used for respectively judging whether each boosting branch is in an abnormal working state based on the control signal of the boosting branch and the feedback signal of the boosting branch.

2. The combining control circuit according to claim 1, wherein Each of the branch status judgment units is respectively connected to the working status terminal of each boosting branch, and is used for judging whether each boosting branch is in an abnormal working state and outputting a judgment result; The status detection module includes: A detection unit, the input end of the detection unit is respectively connected to the output ends of the plurality of branch status judgment units, and is used for receiving the judgment result and detecting whether all boosting branches are in an abnormal working state, and outputting a turn-off signal when it detects that all boosting branches are in an abnormal working state.

3. The multiplexing control circuit according to claim 2, wherein The branch status judgment unit is further used for respectively judging whether each boosting branch is in an abnormal working state based on the control signal of the boosting branch, the feedback signal of the boosting branch and the output voltage signal of the boosting branch.

4. The combining control circuit according to claim 2, wherein The branch status judgment unit includes: An AND gate, the first input end of the AND gate is connected to the control signal terminal of the boosting branch, the second input end of the AND gate is connected to the boosting signal terminal of the boosting branch, and the output end of the AND gate is connected to the detection unit.

5. The multiplexing control circuit according to claim 2, wherein The detection unit includes: An OR gate, the input ends of the OR gate are respectively connected to the output ends of the plurality of branch status judgment units.

6. The combining control circuit according to claim 1, characterized in that, The switching module includes: A control unit, the control unit is connected to the status detection module, and is used for receiving the turn-off signal and outputting a disconnection control signal; A switching unit, the switching unit is connected to the control unit and is arranged between the output end of each boosting branch and the power supply output end, and is used for receiving the disconnection control signal and disconnecting the connection between the output end of each boosting branch and the power supply output end.

7. The combining control circuit according to claim 1, wherein The switching module further includes: A control unit, the control unit is connected to the status detection module, and is used for receiving the turn-off signal and outputting a disconnection control signal; Multiple switching units, each of the switching units is connected to a control unit, a first end of the switching unit is connected to an output end of a boost branch, and second ends of the switching units are connected and connected to a power output end.

8. The combining control circuit according to claim 6 or 7, characterized in that, The control unit includes: A gate driver, the gate driver is respectively connected to the switching unit and the state detection module.

9. The multiplexing control circuit according to claim 6, wherein The switching unit includes: A field effect transistor, a control end of the field effect transistor is connected to the control unit, a first end of the field effect transistor is connected to the output ends of the boost branches, and a second end of the field effect transistor is connected to the power output end.

10. The combining control circuit according to claim 6, characterized in that, The switching unit includes: Multiple field effect transistors, control ends of the field effect transistors are respectively connected to the control unit, first ends of the field effect transistors connected in sequence are connected to the output ends of the boost branches, and second ends of the field effect transistors connected in sequence are connected to the power output end.

11. The multiplexing control circuit according to claim 9 or 10, characterized in that, A diode is reversely connected in parallel to each field effect transistor.

12. A control method for a combining control circuit, characterized in that The control method of the combining control circuit is applied to the combining control circuit according to any one of claims 1 to 11, and the control method of the combining control circuit includes: Collect the operation information of each boost branch, and judge the working state of all boost branches based on the operation information; Disconnect or establish the connection between the output end of the boost branch and the power output end based on the working state of all boost branches.

13. The control method of the multiplexing control circuit according to claim 12, characterized in that, The step of disconnecting or conducting the connection between the output end of the boost branch and the power output end based on the working state of all boost branches includes: Detect whether all boost branches are in an abnormal working state; When it is detected that all boost branches are in an abnormal working state, disconnect the connection between the output end of the boost branch and the power output end.

14. The control method of the multiplexing control circuit according to claim 12, characterized in that, The step of collecting the operation information of each boost branch and judging the working state of all boost branches based on the operation information includes: Obtain the control signal and feedback signal of each boost branch; When it is detected that the control signal is not an enable signal, and / or when it is detected that the feedback signal is not a boost signal, confirm that the boost branch is in an abnormal working state.

15. The control method of the multiplexing control circuit according to claim 12, characterized in that, The step of collecting the operation information of each boost branch and judging the working state of all boost branches based on the operation information further includes: Obtain the control signal, feedback signal and output voltage signal of each boost branch; When it is detected that the control signal is not an enable signal, it is detected that the feedback signal is not a boost signal, and / or when it is detected that the output voltage signal is not a preset voltage signal, confirm that the boost branch is in an abnormal working state.

16. An electronic device, characterized in that, It includes: A memory for storing a computer program; A processor, when executing the computer program, implements the steps of the control method of the combining control circuit according to any one of claims 12 to 15.

17. A computer-readable storage medium, characterized in that, A computer program is stored in the computer-readable storage medium, wherein when the computer program is executed by a processor, the steps of the control method of the combining control circuit according to any one of claims 12 to 15 are implemented.

18. A computer program product comprising a computer program, characterized in that, When the computer program is executed by a processor, the steps of the control method of the combining control circuit according to any one of claims 12 to 15 are implemented.

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