阅读说明：本技术 基于直流转换器的电路控制方法、装置以及电子设备 (Circuit control method and device based on direct current converter and electronic equipment ) 是由 张锰 王鑫桃 于 2020-07-06 设计创作，主要内容包括：本申请提供了一种基于直流转换器的电路控制方法、装置以及电子设备,涉及电路技术领域,缓解了由于直流转换器的接法问题导致直流转换器损坏的技术问题。该方法包括：在所述直流转换器通电时,检测所述第一电压端处的第一实际电压值是否高于或等于第一预设电压值；其中,所述第一预设电压值小于所述第一电压值；如果所述第一实际电压值低于所述第一预设电压值,则通过向所述MOSFET发送关断信号控制所述MOSFET处于关断状态,以使所述第一电压端、所述第二电压端以及所述GND端之间的电路不导通。(The application provides a circuit control method and device based on a direct current converter and electronic equipment, relates to the technical field of circuits, and solves the technical problem that the direct current converter is damaged due to the connection problem of the direct current converter. The method comprises the following steps: detecting whether a first actual voltage value at the first voltage end is higher than or equal to a first preset voltage value when the direct current converter is powered on; wherein the first preset voltage value is smaller than the first voltage value; and if the first actual voltage value is lower than the first preset voltage value, a turn-off signal is sent to the MOSFET to control the MOSFET to be in a turn-off state, so that a circuit among the first voltage end, the second voltage end and the GND end is not conducted.)

1. A circuit control method based on a direct current converter is characterized in that an MCU, a first voltage end, a second voltage end, a GND end, a plurality of switching devices and MOSFETs arranged on the switching devices are arranged in the direct current converter, wherein a first voltage value of the first voltage end is larger than a second voltage value of the second voltage end; the method is applied to the MCU; the method comprises the following steps:

detecting whether a first actual voltage value at the first voltage end is higher than or equal to a first preset voltage value when the direct current converter is powered on; wherein the first preset voltage value is smaller than the first voltage value;

and if the first actual voltage value is lower than the first preset voltage value, a turn-off signal is sent to the MOSFET to control the MOSFET to be in a turn-off state, so that a circuit among the first voltage end, the second voltage end and the GND end is not conducted.

2. The method of claim 1, further comprising:

if the first actual voltage value is higher than or equal to the first preset voltage value, detecting whether a second actual voltage value at the second voltage end is higher than or equal to a second preset voltage value; wherein the second preset voltage value is smaller than the second voltage value;

if the second actual voltage value is lower than the second preset voltage value, stopping sending PWM to a plurality of first appointed switching devices so as to stop the direct current converter;

wherein the first designated switching device is connected to the first voltage terminal.

3. The method of claim 2, wherein the step of detecting whether the second actual voltage value at the second voltage terminal is higher than or equal to a second preset voltage value is followed by further comprising:

if the second actual voltage value is higher than or equal to the second preset voltage value, sending a turn-on signal to a second specified switching device to control the second specified switching device to be turned on so that the direct current converter works in a BUCK mode;

wherein the second designated switching device is located at the first voltage terminal.

4. The method of claim 3, wherein the turn-on signal is a high level signal; the turn-off signal is a low level signal; the MCU controls the MOSFET in a mode of driving the MOSFET to be turned on or turned off through the high level signal or the low level signal.

5. The method of claim 1, wherein said off state is achieved by blocking a reverse voltage through a diode embedded in said MOSFET.

6. The method according to any one of claims 1 to 5, wherein the first voltage terminal is a 48V terminal and the second voltage terminal is a 12V terminal.

7. The method according to claim 6, wherein the first predetermined voltage value is 24V and the second predetermined voltage value is 2.5V.

8. The circuit control device based on the direct current converter is characterized in that an MCU, a first voltage end, a second voltage end, a GND end, a plurality of switching devices and MOSFETs arranged on the switching devices are arranged in the direct current converter, wherein a first voltage value of the first voltage end is larger than a second voltage value of the second voltage end; the device is applied to the MCU; the device comprises:

the detection module is used for detecting whether a first actual voltage value at the first voltage end is higher than or equal to a first preset voltage value or not when the direct current converter is powered on; wherein the first preset voltage value is smaller than the first voltage value;

and the control module is used for sending a turn-off signal to the MOSFET to control the MOSFET to be in a turn-off state if the first actual voltage value is lower than the first preset voltage value, so that a circuit among the first voltage end, the second voltage end and the GND end is not conducted.

9. An electronic device comprising a memory and a processor, wherein the memory stores a computer program operable on the processor, and wherein the processor implements the steps of the method of any of claims 1 to 7 when executing the computer program.

10. A computer readable storage medium having stored thereon machine executable instructions which, when invoked and executed by a processor, cause the processor to execute the method of any of claims 1 to 7.

Technical Field

The present disclosure relates to the field of circuit technologies, and in particular, to a circuit control method and apparatus based on a dc converter, and an electronic device.

Background

At present, in the fields of automobile hybrid systems, power converters and the like, direct current converters are often used. The direct current converter can convert direct current of one volt into direct current of another volt, and can be used for charging batteries and the like. For example, the dc converter has a 48V terminal, a GND terminal, and a 12V terminal. The normal connection method of the direct current converter is that 48V is connected with a 48V terminal, the negative electrode of the battery is connected with a GND terminal, and 12V is connected with a 12V terminal.

However, if the actual connection of the dc converter is not consistent with the normal connection, there is a high possibility that the dc converter will be damaged after power is applied.

Disclosure of Invention

The invention aims to provide a circuit control method and device based on a direct current converter and an electronic device, so as to relieve the technical problem of damage of the direct current converter caused by the connection problem of the direct current converter.

In a first aspect, an embodiment of the present application provides a circuit control method based on a dc converter, where the dc converter is provided with an MCU, a first voltage end, a second voltage end, a GND end, a plurality of switching devices, and MOSFETs arranged on the plurality of switching devices, where a first voltage value of the first voltage end is greater than a second voltage value of the second voltage end; the method is applied to the MCU; the method comprises the following steps:

detecting whether a first actual voltage value at the first voltage end is higher than or equal to a first preset voltage value when the direct current converter is powered on; wherein the first preset voltage value is smaller than the first voltage value;

and if the first actual voltage value is lower than the first preset voltage value, a turn-off signal is sent to the MOSFET to control the MOSFET to be in a turn-off state, so that a circuit among the first voltage end, the second voltage end and the GND end is not conducted.

In one possible implementation, the method further comprises:

if the first actual voltage value is higher than or equal to the first preset voltage value, detecting whether a second actual voltage value at the second voltage end is higher than or equal to a second preset voltage value; wherein the second preset voltage value is smaller than the second voltage value;

if the second actual voltage value is lower than the second preset voltage value, stopping sending PWM to a plurality of first appointed switching devices so as to stop the direct current converter;

wherein the first designated switching device is connected to the first voltage terminal.

In one possible implementation, after the step of detecting whether the second actual voltage value at the second voltage terminal is higher than or equal to the second preset voltage value, the method further includes:

if the second actual voltage value is higher than or equal to the second preset voltage value, sending a turn-on signal to a second specified switching device to control the second specified switching device to be turned on so that the direct current converter works in a BUCK mode;

wherein the second designated switching device is located at the first voltage terminal.

In one possible implementation, the turn-on signal is a high level signal; the turn-off signal is a low level signal; the MCU controls the MOSFET in a mode of driving the MOSFET to be turned on or turned off through the high level signal or the low level signal.

In one possible implementation, the off-state implementation includes a reverse voltage cutoff via a diode embedded in the MOSFET.

In one possible implementation, the first voltage terminal is a 48V terminal, and the second voltage terminal is a 12V terminal.

In one possible implementation, the first preset voltage value is 24V, and the second preset voltage value is 2.5V.

In a second aspect, a circuit control device based on a dc converter is provided, where the dc converter is provided with an MCU, a first voltage terminal, a second voltage terminal, a GND terminal, a plurality of switching devices, and MOSFETs arranged on the plurality of switching devices, where a first voltage value of the first voltage terminal is greater than a second voltage value of the second voltage terminal; the device is applied to the MCU; the device comprises:

the detection module is used for detecting whether a first actual voltage value at the first voltage end is higher than or equal to a first preset voltage value or not when the direct current converter is powered on; wherein the first preset voltage value is smaller than the first voltage value;

and the control module is used for sending a turn-off signal to the MOSFET to control the MOSFET to be in a turn-off state if the first actual voltage value is lower than the first preset voltage value, so that a circuit among the first voltage end, the second voltage end and the GND end is not conducted.

In a third aspect, an embodiment of the present application further provides an electronic device, which includes a memory and a processor, where the memory stores a computer program that is executable on the processor, and the processor implements the method of the first aspect when executing the computer program.

In a fourth aspect, this embodiment of the present application further provides a computer-readable storage medium storing machine executable instructions, which, when invoked and executed by a processor, cause the processor to perform the method of the first aspect.

The embodiment of the application brings the following beneficial effects:

the circuit control method, the circuit control device and the electronic equipment based on the direct current converter can detect whether a first actual voltage value at a first voltage end is higher than or equal to a first preset voltage value of the first voltage value or not when the direct current converter is powered on, and if the first actual voltage value at the first voltage end is lower than the first preset voltage value of the first voltage value, a turn-off signal is sent to the MOSFET to control the MOSFET to be in a turn-off state so as to make circuits among the first voltage end, a second voltage end and a GND end not be conducted, in the scheme, the MCU generates a turn-off signal according to a detection result of the actual voltage value at the first voltage end, the turn-off signal is used for controlling the MOSFET to be in the turn-off state, the MCU is used for controlling the switch of the MOSFET, and the sending opportunity of a reverse MOSFET switching prevention command is controlled, the anti-reverse circuit of the direct current converter avoids the damage of the battery or the direct current converter caused by the wrong connection of the positive electrode and the negative electrode of the battery, and can prevent the damage of the direct current converter caused by the wrong connection of all the ends of the direct current converter.

In order to make the aforementioned objects, features and advantages of the present application more comprehensible, preferred embodiments accompanied with figures are described in detail below.

Drawings

In order to more clearly illustrate the detailed description of the present application or the technical solutions in the prior art, the drawings needed to be used in the detailed description of the present application or the prior art description will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative efforts.

Fig. 1 is a schematic flowchart of a circuit control method based on a dc converter according to an embodiment of the present disclosure;

fig. 2 is various connection examples of a dc converter provided in an embodiment of the present application;

fig. 3 is a schematic circuit diagram of a dc converter according to an embodiment of the present disclosure;

fig. 4 is a schematic structural diagram of a circuit control device based on a dc converter according to an embodiment of the present disclosure;

fig. 5 is a schematic structural diagram illustrating an electronic device provided in an embodiment of the present application.

Detailed Description

To make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions of the present application will be clearly and completely described below with reference to the accompanying drawings, and it is obvious that the described embodiments are some, but not all embodiments of the present application. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

The terms "comprising" and "having," and any variations thereof, as referred to in the embodiments of the present application, are intended to cover non-exclusive inclusions. For example, a process, method, system, article, or apparatus that comprises a list of steps or elements is not limited to only those steps or elements but may alternatively include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.

At present, in the fields of automobile hybrid systems, power converters and the like, direct current converters are often used. For example, a dc converter may convert 12V dc to 48V dc for charging a 48V battery. A typical dc converter has a 48V terminal, a GND terminal, and a 12V terminal. The normal connection method of the direct current converter is that 48V is connected with a 48V terminal, the negative electrode of the battery is connected with a GND terminal, and 12V is connected with a 12V terminal. If not consistent with normal connections, there is a high probability of damage to the battery or converter.

Based on this, the embodiments of the present application provide a circuit control method and apparatus based on a dc converter, and an electronic device, by which the technical problem of damage to the dc converter due to the connection problem of the dc converter can be alleviated.

Embodiments of the present invention are further described below with reference to the accompanying drawings.

Fig. 1 is a schematic flowchart of a circuit control method based on a dc converter according to an embodiment of the present disclosure. The direct current converter is provided with an MCU, a first voltage end, a second voltage end, a GND end, a plurality of switching devices and MOSFETs arranged on the switching devices, wherein a first voltage value of the first voltage end is greater than a second voltage value of the second voltage end; the method is applied to the MCU.

As shown in fig. 1, the method includes:

step S110, when the dc converter is powered on, detects whether the first actual voltage value at the first voltage end is higher than or equal to a first preset voltage value.

The first preset voltage value is smaller than the first voltage value.

Step S120, if the first actual voltage value is lower than the first preset voltage value, the MOSFET is controlled to be in an off state by sending an off signal to the MOSFET, so that the circuit between the first voltage terminal, the second voltage terminal, and the GND terminal is not turned on.

As an example, the first voltage terminal is a 48V terminal and the second voltage terminal is a 12V terminal. For example, as shown in fig. 2, the dc converter is provided with a 48V terminal, a 12V terminal, and a GND terminal. The 2 nd, 3 rd, 4 th and 5 th connections in fig. 2 are wrong connections.

For the internal circuit structure in the dc converter, as shown in fig. 3, for example, Q1 to Q12 are switching control transistors, that is, the above-mentioned switching devices.

As an example, the first preset voltage value is 24V. For example, for connection 2 in fig. 2, after the dc converter is powered on, the MCU detects that the voltage at 48V is lower than 24V, and all MOSFETs are in off state, and since Q3 has a diode embedded therein, 12V cannot be conducted through the terminal at 48V and GND, and since Q11 has a diode embedded therein, 48V cannot be conducted through the terminal at 12V and GND.

For another example, in connection 3 in fig. 2, after the dc converter is powered on, the MCU detects that the voltage at 48V is lower than 24V, and all MOSFETs are in off state, and since Q13 has a diode embedded therein, 48V cannot be conducted through GND terminal and 12V terminal, since Q3 has a diode embedded therein, 12V cannot be conducted through 48V terminal and 12V terminal, and since Q8 has a diode embedded therein, 48V cannot be conducted through GND terminal and 12V terminal.

For another example, in connection 4 in fig. 2, after the dc converter is powered on, the MCU detects that the voltage at 48V is lower than 24V, and all MOSFETs are in off state, and since Q13 has a diode embedded therein, 48V cannot be conducted through the GND terminal and the 12V terminal, 12V cannot be conducted through the 12V terminal and the 48V terminal, and since Q8 has a diode embedded therein, 48V cannot be conducted through the GND terminal and the 12V terminal.

For another example, in connection 5 in fig. 2, after the dc converter is powered on, the MCU detects that the voltage at 48V is lower than 24V, and all MOSFETs are in off state, and because Q13 has a diode embedded therein, 48V cannot be conducted through the 12V terminal and the 48V terminal, 12V cannot be conducted through the GND terminal and the 48V terminal, and because Q11 has a diode embedded therein, 48V cannot be conducted through the 12V terminal and the GND terminal.

Of course, in terms of hardware, the driving pins of the power devices such as the MCU and the switching device must be correctly connected, and the logic of the power device switch must be matched with the command sent by the MCU.

The MCU for main control generates a turn-off signal according to the detection result of the actual voltage value at the first voltage end, the turn-off signal is used for controlling the switch state of the MOSFET, the MOSFET switch is controlled by the MCU, the sending time of the switch command of the reverse-prevention MOSFET is controlled, the damage of the battery or the DC converter caused by the wrong connection of the anode and the cathode of the battery is avoided through the reverse-prevention circuit of the DC converter, and for example, the damage of the battery or the converter caused by the abnormal connection of a 48V terminal, a GND terminal and a 12V terminal can be prevented.

The above steps are described in detail below.

In some embodiments, the method may further comprise the steps of:

step a), if the first actual voltage value is higher than or equal to the first preset voltage value, detecting whether a second actual voltage value at the second voltage end is higher than or equal to a second preset voltage value; wherein the second preset voltage value is smaller than the second voltage value;

step b), if the second actual voltage value is lower than the second preset voltage value, stopping sending PWM to the first appointed switching devices so as to stop the direct current converter from working; wherein the first designated switching device is connected to the first voltage terminal.

As an example, the second preset voltage value is 2.5V. For example, in the method of connection 6 in fig. 2, after the dc converter is powered on, the voltage at the 48 terminal is normal, the converter starts BUCK operation, and the Q8 and the Q11 are still in an off state, because the 12V terminal and the GND terminal are reversely connected, five seconds after the converter performs BUCK operation, the voltage between the rear inductor and the Q8 is still lower than 2.5V, at this time, the MCU determines that the 12V side is abnormal, and stops sending PWM to the Q3 and the Q4, and the converter stops operating.

In some embodiments, after the step a) above, the method may further comprise the steps of:

and c), if the second actual voltage value is higher than or equal to the second preset voltage value, sending a turn-on signal to the second specified switching device to control the second specified switching device to be turned on so as to enable the direct current converter to work in a BUCK mode.

Wherein the second designated switching device is located at the first voltage terminal.

For example, for the connection 1 (normal connection) in fig. 2, after the dc converter is powered on, the MCU detects that the voltages at the terminals 48V and 12V are normal, the MCU sends a high level to the Q13 to turn on the Q13, and then the converter starts to operate in BUCK mode to generate 12V voltage.

In some embodiments, the turn-on signal is a high level signal; the turn-off signal is a low level signal; the MCU controls the MOSFET by driving the MOSFET to be switched on or switched off through a high level signal or a low level signal.

In the embodiment of the application, the main control MCU module generates a high-low level switch signal; the MOSFET changes the switch state according to the level of the switch signal. It can also be understood that the switching signal drives the MOSFET switch to control the switching of the anti-reverse MOSFET.

In some embodiments, the off state is achieved by blocking the reverse voltage through a diode embedded in the MOSFET. In the embodiment of the application, a mode of utilizing a MOSFET embedded diode to cut off reverse voltage is adopted.

Fig. 4 provides a schematic structural diagram of a circuit control device based on a dc converter. The direct current converter is provided with an MCU, a first voltage end, a second voltage end, a GND end, a plurality of switching devices and MOSFETs arranged on the switching devices, wherein a first voltage value of the first voltage end is greater than a second voltage value of the second voltage end; the device is applied to the MCU. As shown in fig. 4, the dc converter-based circuit control device 400 includes:

a first detecting module 401, configured to detect whether a first actual voltage value at the first voltage end is higher than or equal to a first preset voltage value when the dc converter is powered on; wherein the first preset voltage value is smaller than the first voltage value;

a first control module 402, configured to, if the first actual voltage value is lower than the first preset voltage value, send a turn-off signal to the MOSFET to control the MOSFET to be in a turn-off state, so that a circuit between the first voltage terminal, the second voltage terminal, and the GND terminal is not turned on.

In some embodiments, the apparatus further comprises:

a second detecting module, configured to detect whether a second actual voltage value at the second voltage end is higher than or equal to a second preset voltage value if the first actual voltage value is higher than or equal to the first preset voltage value; wherein the second preset voltage value is smaller than the second voltage value;

the stopping module is used for stopping sending PWM to the first appointed switching devices to stop the direct current converter from working if the second actual voltage value is lower than the second preset voltage value;

wherein the first designated switching device is connected to the first voltage terminal.

In some embodiments, the apparatus further comprises:

the second control module is used for controlling the second specified switching device to be conducted by sending a turn-on signal to the second specified switching device if the second actual voltage value is higher than or equal to the second preset voltage value, so that the direct current converter works in a BUCK mode;

wherein the second designated switching device is located at the first voltage terminal.

In some embodiments, the turn-on signal is a high level signal; the turn-off signal is a low level signal; the MCU controls the MOSFET in a mode of driving the MOSFET to be turned on or turned off through the high level signal or the low level signal.

In some embodiments, the off state is achieved by blocking a reverse voltage through a diode embedded in the MOSFET.

In some embodiments, the first voltage terminal is a 48V terminal and the second voltage terminal is a 12V terminal.

In some embodiments, the first preset voltage value is 24V, and the second preset voltage value is 2.5V.

The circuit control device based on the dc converter according to the embodiment of the present application has the same technical features as the circuit control method based on the dc converter according to the above embodiment, so that the same technical problems can be solved, and the same technical effects can be achieved.

As shown in fig. 5, an electronic device 500 includes a memory 501 and a processor 502, where the memory stores a computer program that can run on the processor, and the processor executes the computer program to implement the steps of the method provided in the foregoing embodiment.

Referring to fig. 5, the electronic device further includes: a bus 503 and a communication interface 504, and the processor 502, the communication interface 504 and the memory 501 are connected by the bus 503; the processor 502 is for executing executable modules, e.g. computer programs, stored in the memory 501.

The Memory 501 may include a high-speed Random Access Memory (RAM), and may also include a non-volatile Memory (non-volatile Memory), such as at least one disk Memory. The communication connection between the network element of the system and at least one other network element is realized through at least one communication interface 504 (which may be wired or wireless), and the internet, a wide area network, a local network, a metropolitan area network, and the like can be used.

Bus 503 may be an ISA bus, PCI bus, EISA bus, or the like. The bus may be divided into an address bus, a data bus, a control bus, etc. For ease of illustration, only one double-headed arrow is shown in FIG. 5, but this does not indicate only one bus or one type of bus.

The memory 501 is used for storing a program, and the processor 502 executes the program after receiving an execution instruction, and the method performed by the apparatus defined by the process disclosed in any of the foregoing embodiments of the present application may be applied to the processor 502, or implemented by the processor 502.

The processor 502 may be an integrated circuit chip having signal processing capabilities. In implementation, the steps of the above method may be performed by integrated logic circuits of hardware or instructions in the form of software in the processor 502. The Processor 502 may be a general-purpose Processor, and includes a Central Processing Unit (CPU), a Network Processor (NP), and the like; the device can also be a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), a Field-Programmable Gate Array (FPGA) or other Programmable logic device, a discrete Gate or transistor logic device, or a discrete hardware component. The various methods, steps, and logic blocks disclosed in the embodiments of the present application may be implemented or performed. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like. The steps of the method disclosed in connection with the embodiments of the present application may be directly implemented by a hardware decoding processor, or implemented by a combination of hardware and software modules in the decoding processor. The software module may be located in ram, flash memory, rom, prom, or eprom, registers, etc. storage media as is well known in the art. The storage medium is located in the memory 501, and the processor 502 reads the information in the memory 501, and completes the steps of the method in combination with the hardware thereof.

Corresponding to the above-mentioned circuit control method based on the dc converter, the present application also provides a computer readable storage medium, in which machine executable instructions are stored, and when the computer executable instructions are called and executed by a processor, the computer executable instructions cause the processor to execute the steps of the above-mentioned circuit control method based on the dc converter.

The circuit control device based on the dc converter provided in the embodiments of the present application may be specific hardware on a device, or software or firmware installed on a device, or the like. The device provided by the embodiment of the present application has the same implementation principle and technical effect as the foregoing method embodiments, and for the sake of brief description, reference may be made to the corresponding contents in the foregoing method embodiments where no part of the device embodiments is mentioned. It is clear to those skilled in the art that, for convenience and brevity of description, the specific working processes of the foregoing systems, apparatuses and units may refer to the corresponding processes in the foregoing method embodiments, and are not described herein again.

In the embodiments provided in the present application, it should be understood that the disclosed apparatus and method may be implemented in other ways. The above-described embodiments of the apparatus are merely illustrative, and for example, the division of the units is only one logical division, and there may be other divisions when actually implemented, and for example, a plurality of units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection of devices or units through some communication interfaces, and may be in an electrical, mechanical or other form.

For another example, the flowchart and block diagrams in the figures illustrate the architecture, functionality, and operation of possible implementations of apparatus, methods and computer program products according to various embodiments of the present application. In this regard, each block in the flowchart or block diagrams may represent a module, segment, or portion of code, which comprises one or more executable instructions for implementing the specified logical function(s). It should also be noted that, in some alternative implementations, the functions noted in the block may occur out of the order noted in the figures. For example, two blocks shown in succession may, in fact, be executed substantially concurrently, or the blocks may sometimes be executed in the reverse order, depending upon the functionality involved. It will also be noted that each block of the block diagrams and/or flowchart illustration, and combinations of blocks in the block diagrams and/or flowchart illustration, can be implemented by special purpose hardware-based systems which perform the specified functions or acts, or combinations of special purpose hardware and computer instructions.

The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.

In addition, functional units in the embodiments provided in the present application may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit.

The functions, if implemented in the form of software functional units and sold or used as a stand-alone product, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present application or portions thereof that substantially contribute to the prior art may be embodied in the form of a software product stored in a storage medium and including instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the circuit control method based on the dc converter according to the embodiments of the present application. And the aforementioned storage medium includes: various media capable of storing program codes, such as a usb disk, a removable hard disk, a Read-only Memory (ROM), a Random Access Memory (RAM), a magnetic disk, or an optical disk.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus once an item is defined in one figure, it need not be further defined and explained in subsequent figures, and moreover, the terms "first", "second", "third", etc. are used merely to distinguish one description from another and are not to be construed as indicating or implying relative importance.

Finally, it should be noted that: the above-mentioned embodiments are only specific embodiments of the present application, and are used for illustrating the technical solutions of the present application, but not limiting the same, and the scope of the present application is not limited thereto, and although the present application is described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: any person skilled in the art can modify or easily conceive the technical solutions described in the foregoing embodiments or equivalent substitutes for some technical features within the technical scope disclosed in the present application; such modifications, changes or substitutions do not depart from the scope of the embodiments of the present application. Are intended to be covered by the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.