Disclosure of Invention
The embodiment of the application provides a control method and device of a flyback converter, electronic equipment and a computer readable storage medium, which can solve the problems that in the prior art, an MOS tube of a secondary winding module of the flyback converter overlaps with a conduction signal of an MOS tube of a primary winding module to generate a large through current, so that the primary secondary side is directly connected, and the reliability and safety of power supply work are further reduced.
In a first aspect, an embodiment of the present application provides a control method for a flyback converter, including:
when the secondary winding module of the flyback converter is detected to be at the minimum on time, determining the target turn-off time of the secondary winding module according to the demagnetizing time of the secondary winding module and the minimum on time;
and controlling the secondary winding module to be turned off in the target turn-off time.
Optionally, when detecting that the secondary winding module of the flyback converter is at the minimum on-time, determining the target off-time of the secondary winding module according to the demagnetizing time of the secondary winding module and the minimum on-time includes:
when the demagnetization time is detected to be smaller than the minimum on time, determining a first preset off time as the target off time;
when the demagnetization time is detected to be greater than or equal to the minimum on time, determining a second preset off time as the target off time; the second preset turn-off time is less than the first preset turn-off time.
Optionally, the target off-time is greater than a resonance period of the flyback converter.
Optionally, the resonance period is calculated according to the following formula:
wherein T represents the resonance period, Lm Representing the excitation inductance of the flyback converter, Ceq Representing an equivalent parasitic capacitance of the flyback converter; the equivalent parasitic capacitanceThe parasitic capacitance of the primary side winding module of the flyback converter, the parasitic capacitance of the secondary side winding module and the parasitic capacitance of the transformer are included.
Optionally, before determining the target turn-off time of the secondary winding module according to the demagnetization time of the secondary winding module and the minimum turn-on time when the secondary winding module of the flyback converter is detected to be at the minimum turn-on time, the method further includes:
leading the excitation inductance of the flyback converter, the peak current and the output voltage of the flyback converter into a preset formula to obtain the demagnetization time; the preset formula is as follows:
wherein t represents the demagnetization time, Lm Indicating the exciting inductance and Ipeak Representing the peak current, Vo Representing the output voltage, n represents the ratio of the number of turns of the primary winding to the secondary winding of the flyback converter.
Optionally, when detecting that the secondary winding module of the flyback converter is at the minimum on-time, determining the target off-time of the secondary winding module according to the demagnetizing time of the secondary winding module and the minimum on-time includes:
and determining the target turn-off time according to the working mode of the flyback converter, the demagnetizing time and the minimum turn-on time.
In a second aspect, an embodiment of the present application provides a control device for a flyback converter, including:
the first determining unit is used for determining target turn-off time of the secondary winding module according to the demagnetizing time of the secondary winding module and the minimum turn-on time when the secondary winding module of the flyback converter is detected to be at the minimum turn-on time;
and the control unit is used for controlling the secondary winding module to be turned off in the target turn-off time.
In a third aspect, an embodiment of the present application provides an electronic device, including a memory, a processor, and a computer program stored in the memory and executable on the processor, where the processor implements the steps of the method for controlling a flyback converter according to any one of the first aspects when the processor executes the computer program.
In a fourth aspect, embodiments of the present application provide a computer readable storage medium storing a computer program which, when executed by a processor, implements the steps of the method of controlling a flyback converter as described in any of the first aspects above.
In a fifth aspect, embodiments of the present application provide a computer program product, which, when run on an electronic device, enables the electronic device to perform a method of controlling a flyback converter according to any of the first aspects above.
Compared with the prior art, the embodiment of the application has the beneficial effects that:
according to the control method of the flyback converter, when the secondary winding module of the flyback converter is detected to be in the minimum conduction time, the target turn-off time of the secondary winding module can be determined according to the demagnetizing time and the minimum conduction time of the secondary winding module, and the secondary winding module is controlled to be turned off in the target turn-off time, so that the secondary winding module is ensured to be turned on in the target turn-off time, even if the oscillation amplitude of the drain voltage value of the second MOS tube of the secondary winding module is increased after the secondary winding module is turned on for one time for the minimum conduction time, the secondary winding module can still be prevented from entering the on state again when the secondary winding module reaches the minimum conduction time, because the secondary winding module is in the target turn-off time at the moment, the secondary winding module is in the forced turn-off state, the secondary winding is prevented from being in the on state when the primary winding module of the flyback converter, namely the direct-through phenomenon of the primary secondary winding is prevented, and the reliability and the safety of the power supply are ensured.
Detailed Description
In the following description, for purposes of explanation and not limitation, specific details are set forth such as the particular system architecture, techniques, etc., in order to provide a thorough understanding of the embodiments of the present application. It will be apparent, however, to one skilled in the art that the present application may be practiced in other embodiments that depart from these specific details. In other instances, detailed descriptions of well-known systems, devices, circuits, and methods are omitted so as not to obscure the description of the present application with unnecessary detail.
It should be understood that the terms "comprises" and/or "comprising," when used in this specification and the appended claims, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof.
It should also be understood that the term "and/or" as used in the present specification and the appended claims refers to any and all possible combinations of one or more of the associated listed items, and includes such combinations.
As used in the present description and the appended claims, the term "if" may be interpreted as "when..once" or "in response to a determination" or "in response to detection" depending on the context. Similarly, the phrase "if a determination" or "if a [ described condition or event ] is detected" may be interpreted in the context of meaning "upon determination" or "in response to determination" or "upon detection of a [ described condition or event ]" or "in response to detection of a [ described condition or event ]".
Furthermore, the terms "first," "second," "third," and the like in the description of the present specification and in the appended claims, are used for distinguishing between descriptions and not necessarily for indicating or implying a relative importance.
Reference in the specification to "one embodiment" or "some embodiments" or the like means that a particular feature, structure, or characteristic described in connection with the embodiment is included in one or more embodiments of the application. Thus, appearances of the phrases "in one embodiment," "in some embodiments," "in other embodiments," and the like in the specification are not necessarily all referring to the same embodiment, but mean "one or more but not all embodiments" unless expressly specified otherwise. The terms "comprising," "including," "having," and variations thereof mean "including but not limited to," unless expressly specified otherwise.
Referring to fig. 1, fig. 1 is a circuit configuration diagram of a flyback converter according to an embodiment of the application. As shown in fig. 1, the flyback converter includes a primary winding module 10, a secondary winding module 20, a transformer 30 connecting the primary winding module 10 and the secondary winding module 20, and a load RL connected to the secondary winding module 20. The transformer 30 includes a primary winding Np and a secondary winding Ns. As shown in fig. 1, the flyback converter can be connected with an input voltage Vin and provides a stable output voltage Vo to a load.
As shown in fig. 1, the primary winding module 10 includes: inductance coil Lk, diode D, first MOS transistor MOS1, first capacitor C1, second capacitor C2, third capacitor C3, and resistor R.
The first end of the inductance coil Lk is connected with the first end of the primary winding Np, the first end of the first capacitor C1 and the first end of the resistor R are connected with the second end of the inductance coil Lk, the second end of the first capacitor C1 and the second end of the resistor R are connected with the negative electrode of the diode D, the negative electrode of the diode is connected with the first end of the second capacitor C2, the positive electrode of the diode D, the second end of the second capacitor C2, the drain electrode of the first MOS transistor MOS1 and the first end of the third capacitor are connected with the second end of the primary winding Np, the source electrode of the first MOS transistor MOS1 and the second end of the third capacitor are connected with the negative electrode of the power supply, the grid electrode of the first MOS transistor MOS1 is used for receiving the pulse signal (i.e., PWM-S1) of the primary winding module 10, and the first end of the resistor R and the second end of the inductance coil Lk are connected with the positive electrode of the power supply.
The secondary winding module 20 includes: the second MOS transistor MOS2, the fourth capacitor C4 and the fifth capacitor C5.
The source of the second MOS transistor MOS2 and the first end of the fourth capacitor C4 are commonly connected to the first end of the secondary winding Ns, the drain of the second MOS transistor MOS2 and the second end of the fourth capacitor C4 are commonly connected to the first end of the fifth capacitor, the gate of the second MOS transistor MOS2 is configured to receive the pulse signal (i.e., PWM-SR) of the secondary winding module 20, the second end of the fifth capacitor and the input end of the load are commonly connected to the second end of the secondary winding Ns, and the output end of the load is connected to the first end of the fifth capacitor.
In practical application, referring to fig. 1, the working principle of the flyback converter is that when the primary winding module 10 of the flyback converter is turned on, the primary inductance current starts to rise, at this time, the second MOS2 of the secondary winding module 20 is turned off due to the relationship of the same name end of the secondary winding module 20, the flyback converter stores energy, and the load RL is supplied with energy by the fifth capacitor C5; when the primary winding module 10 is turned off, the primary inductance induced voltage of the flyback converter is reversed, and at this time, the second MOS2 of the secondary winding module 20 is turned on, and energy in the flyback converter supplies power to the load RL via the second MOS2, and simultaneously charges the fifth capacitor C5 to supplement energy output when the primary winding module 10 is turned on.
In the embodiment of the present application, taking the flyback converter as an example in burst mode as shown in fig. 2, when the pulse signal PWM-S1 of the primary winding module of the flyback converter is converted from high level to low level, that is, the primary winding module is turned off (that is, at time t 1), the drain voltage of the second MOS transistor of the secondary winding module will drop sharply, and at time t2, the drain voltage is zero, and the drop slope of the drain voltage from time t1 to time t2 is greater than the preset threshold, at this time, the pulse signal PWM-SR of the secondary winding module is converted from low level to high level, that is, the secondary winding module is in the minimum on time (time t2 to time t 4), that is, in the on state, because the demagnetization time of the secondary winding module is from time t2 to time t3, and before time t4, that is, the demagnetization time of the secondary winding module is less than the minimum on time, so that the secondary winding module 20 generates negative current at time t 3. When the time t4 is reached, the secondary winding module ends the minimum on time and enters an off state (pulse signal PWM-SR of the secondary winding module is converted from high level to low level), at this time, due to the turn-off of negative current, the drain voltage of the second MOS tube of the secondary winding module is rapidly oscillated (such as the time t4 to the time t5, namely the turn-off time of the secondary winding module) until the secondary winding module enters the minimum on time again, at this time, the negative current of the secondary winding module is continuously increased until the secondary winding module ends the minimum on time again and enters the off state, at this time, due to the turn-off of the larger negative current, the drain voltage of the second MOS tube of the secondary winding module is more rapidly oscillated (such as the time t6 to the time t7, namely the turn-off time of the secondary winding module) until the secondary winding module enters the minimum on time again, at the time t8, the primary winding module of the flyback converter reaches the on time, the primary winding module is turned on, and the second MOS tube of the secondary winding module and the primary MOS tube of the primary winding module are overlapped, and the primary MOS tube of the primary winding module generates large current.
Based on this, the electronic device can determine the target turn-off time of the secondary winding module according to the demagnetization time and the minimum turn-on time of the secondary winding module when the secondary winding module of the flyback converter is detected to be in the minimum turn-on time, and control the secondary winding module to turn off in the target turn-off time, so that after the secondary winding module of the flyback converter is turned on in the minimum turn-on time, even if the oscillation amplitude of the drain voltage value of the second MOS transistor of the secondary winding module is increased, and when the secondary winding module reaches the minimum turn-on time again in the later stage, the secondary winding module can still be prevented from entering the turn-on state again, because the secondary winding module is in the target turn-off time, the secondary winding module is in the forced turn-off state, thereby avoiding the direct phenomenon of the primary side and the secondary side when the primary winding module of the flyback converter is in the turn-on state, and ensuring the reliability and safety of the power supply operation.
The flyback converter shown in fig. 1 will be described below as an example, and the flyback converter is in burst mode (burst mode). The burst mode is used for describing an operation mode that the flyback converter turns on the switching tube only when detecting that the voltage is higher than a preset voltage in a light load state (i.e., a low power consumption sleep mode). The preset voltage may be determined according to actual needs, and is not limited herein.
Referring to fig. 3, fig. 3 is a flowchart illustrating a control method of a flyback converter according to an embodiment of the application. An execution main body of the control method of the flyback converter provided by the embodiment of the application is electronic equipment.
As shown in fig. 3, the control method of the flyback converter according to an embodiment of the present application may include S101 to S102, which are described in detail as follows:
in S101, when it is detected that the secondary winding module of the flyback converter is at the minimum on time, determining a target off time of the secondary winding module according to the demagnetizing time of the secondary winding module and the minimum on time.
In the embodiment of the application, after the primary winding module is turned off, the drain voltage of the second MOS tube of the secondary winding module begins to drop sharply, and when the drain voltage of the second MOS tube of the secondary winding module is zero, the slope of the curve formed by the drain voltage value of the second MOS tube of the secondary winding module is larger than the preset slope, the secondary winding module is turned on. When the primary winding module reaches the next conduction time, the secondary winding module is in a conduction state, and at the moment, the second MOS tube of the secondary winding module overlaps with the conduction signal of the first MOS tube of the primary winding module to generate through current, so that the primary and secondary side through phenomenon is caused. Thus, the electronic device needs to determine whether the secondary winding module is at a minimum on-time when detecting that the primary winding module of the flyback converter is off.
In practical applications, since the minimum on-time is usually a fixed time period, when the electronic device detects that the primary winding module of the flyback converter is turned off, and the on-time of the secondary winding module of the flyback converter is a preset time period, it can be determined that the secondary winding module is at the minimum on-time. The preset time period may be set according to actual needs, and exemplary, the preset time period may be set to 300 nanoseconds.
It should be noted that, when the secondary winding module of the flyback converter is in the minimum on time, the secondary winding module may generate negative current, after the secondary winding module generates negative current, if the turn-off time of the secondary winding module is reached at this time, the negative current of the secondary winding module is turned off, so that the oscillation amplitude of the drain voltage value of the second MOS transistor of the secondary winding module is increased, so that the secondary winding module can enter the on state again, and further the negative current is further increased, and the cycle is repeated, so that when the primary winding module enters the next on period, the secondary winding module is also in the on state, and the primary secondary side through phenomenon is generated.
Because whether the secondary winding module generates negative current needs to be determined according to the demagnetizing time and the minimum on time of the secondary winding module, then the electronic device determines the target turn-off time of the secondary winding module according to whether the secondary winding module generates negative current, that is, in the embodiment of the application, the electronic device can determine the target turn-off time of the secondary winding module according to the demagnetizing time and the minimum on time of the secondary winding module.
In practical application, referring to fig. 2, the demagnetization time of the secondary winding module is a period of time when the current of the secondary winding module decreases from the peak value to zero, i.e. from time t2 to time t 3.
In one embodiment of the application, the electronic device can specifically obtain the excitation inductance of the flyback converter, the peak current and the output voltage of the flyback converter, and guide the excitation inductance, the peak current and the output voltage into a preset formula, thereby obtaining the demagnetization time of the secondary winding module. The preset formula is as follows:
wherein t represents the demagnetization time of the secondary winding module, Lm Indicating the excitation inductance of the flyback converter, Ipeak Representing peak current, V, of secondary winding module of flyback convertero The output voltage of the flyback converter is represented, and n represents the ratio of the number of turns of the primary winding to the secondary winding of the flyback converter.
In another embodiment of the present application, S101 may be specifically implemented by steps S1011 to S1012 shown in fig. 4, which are described in detail as follows:
in S1011, when it is detected that the demagnetization time is smaller than the minimum on time, a first preset off time is determined as the target off time.
In S1012, when it is detected that the demagnetization time is greater than or equal to the minimum on time, determining a second preset off time as the target off time; the second preset turn-off time is less than the first preset turn-off time.
In this embodiment, when the electronic device detects that the secondary winding module is at the minimum on time, it may be determined that the demagnetization time of the secondary winding module is less than the minimum on time, so that in order to avoid the subsequent secondary winding module from generating erroneous conduction, that is, to avoid the secondary winding module being in the on state when reaching the next minimum on time, it is necessary to make the secondary winding module be in the forced off state when reaching the next minimum on time by using the target off time, and therefore, the electronic device may determine the first preset off time as the target off time. The first preset off time may be set according to actual needs, and is not limited herein.
As shown in fig. 5, fig. 5 is a schematic waveform diagram of the flyback converter when the electronic device detects that the demagnetization time is less than the minimum conduction time.
In this embodiment, when the electronic device detects that the demagnetization time is greater than or equal to the minimum on time, it indicates that the secondary winding module does not generate erroneous conduction, that is, the secondary winding module of the flyback converter does not need to be turned off for a longer time, so the electronic device may determine the second preset off time as the target off time. The second preset turn-off time is smaller than the first preset turn-off time.
For example, assuming that the exciting inductance of the flyback converter is 70uH and the equivalent parasitic capacitance is 200pf, the resonant period of the flyback converter is 794ns, the first preset off time may be set to 1200ns, and the second preset off time may be set to 600ns.
In another embodiment of the present application, the modes of operation of the flyback converter include, but are not limited to: burst mode and constant frequency mode. The constant frequency mode refers to an operating mode in which the pulse signal frequency of the flyback converter is always kept unchanged and the flyback converter is always operating. Therefore, the electronic device can also determine the target turn-off time according to the working mode of the flyback converter, the demagnetization time of the secondary winding module and the minimum turn-on time.
In one implementation of the embodiment of the present application, when the electronic device determines that the demagnetization time of the secondary winding module is less than the minimum on time, the target off time needs to be greater than the resonance period of the flyback converter.
In one embodiment of the application, the resonant period of the flyback converter can be calculated according to the following formula:
wherein T represents the resonance period of the flyback converter, Lm Representing the excitation inductance of the flyback converter, Ceq Representing the equivalent parasitic capacitance of the flyback converter; the equivalent parasitic capacitance comprises the parasitic capacitance of the first MOS tube of the primary winding module of the flyback converter, the parasitic capacitance of the second MOS tube of the secondary winding module and the parasitic capacitance of the transformer. Wherein parasitic capacitance, also referred to as stray capacitance, refers to distributed capacitance between wires, between coils and a housing, between certain elements, etc.
In S102, the secondary winding module is controlled to turn off during the target off time.
In this embodiment, after determining the target turn-off time, in order to avoid the primary-secondary side through phenomenon of the flyback converter, the electronic device may control the secondary side winding module of the flyback converter to turn off in the target turn-off time.
As can be seen from the above, in the control method of the flyback converter provided by the embodiment of the application, when the secondary winding module of the flyback converter is detected to be in the minimum on time, the target off time of the secondary winding module can be determined according to the demagnetizing time and the minimum on time of the secondary winding module, and the secondary winding module is controlled to be turned off in the target off time, so that the secondary winding module is ensured to be turned on in the target off time, even if the oscillation amplitude of the drain voltage value of the second MOS tube of the secondary winding module is increased after the secondary winding module passes through the minimum on time, and the secondary winding module still can be prevented from entering the on state again when reaching the minimum on time again, because the secondary winding module is at the target off time at this time, the secondary winding module is in the forced off state, and the secondary winding is prevented from being in the on state when the primary winding module of the flyback converter, namely the primary and secondary windings are prevented from being in the on state, and the reliability and the safety of the power supply are ensured.
It should be understood that the sequence number of each step in the foregoing embodiment does not mean that the execution sequence of each process should be determined by the function and the internal logic, and should not limit the implementation process of the embodiment of the present application.
Fig. 6 is a block diagram of a control device of a flyback converter according to an embodiment of the present application, and only the parts related to the embodiment of the present application are shown for convenience of explanation. Referring to fig. 6, the control device 600 of the flyback converter includes: a first determination unit 61 and a control unit 62. Wherein:
the first determining unit 61 is configured to determine, when detecting that a secondary winding module of the flyback converter is at a minimum on time, a target off time of the secondary winding module according to a demagnetization time of the secondary winding module and the minimum on time.
The control unit 62 is configured to control the secondary winding module to be turned off during the target off time.
In one embodiment of the present application, the first determining unit 61 specifically includes: a first time determination unit and a second time determination unit. Wherein:
the first time determining unit is used for determining a first preset turn-off time as the target turn-off time when the demagnetization time is detected to be smaller than the minimum turn-on time.
The second time determining unit is used for determining a second preset turn-off time as the target turn-off time when the demagnetization time is detected to be greater than or equal to the minimum turn-on time; the second preset turn-off time is less than the first preset turn-off time.
In one embodiment of the application, the target off-time is greater than a resonant period of the flyback converter.
In one embodiment of the application, the resonance period is calculated according to the following formula:
wherein T represents the resonance period, Lm Representing the excitation inductance of the flyback converter, Ceq Representing an equivalent parasitic capacitance of the flyback converter; the equivalent parasitic capacitance comprises the parasitic capacitance of the first MOS tube of the primary winding module of the flyback converter, the parasitic capacitance of the second MOS tube of the secondary winding module and the parasitic capacitance of the transformer.
In one embodiment of the present application, the control device 600 of the flyback converter further includes: and an introduction unit.
The input unit is used for inputting the excitation inductance of the flyback converter, the peak current and the output voltage of the flyback converter into a preset formula to obtain the demagnetization time; the preset formula is as follows:
wherein t represents the demagnetization time, Lm Indicating the exciting inductance and Ipeak Representing the peak current, Vo Representing the output voltage, n represents the ratio of the number of turns of the primary winding to the secondary winding of the flyback converter.
In one embodiment of the present application, the first determining unit 62 is specifically configured to: and determining the target turn-off time according to the working mode of the flyback converter, the demagnetizing time and the minimum turn-on time.
As can be seen from the above, in the control device for a flyback converter provided by the embodiment of the present application, when the secondary winding module of the flyback converter is detected to be in the minimum on time, the target off time of the secondary winding module can be determined according to the demagnetizing time and the minimum on time of the secondary winding module, and the secondary winding module is controlled to be turned off in the target off time, so that after the secondary winding module is turned on for one time in the minimum on time, even if the oscillation amplitude of the drain voltage value of the second MOS transistor of the secondary winding module is increased, and the secondary winding module reaches the minimum on time again, the secondary winding module can still be prevented from entering the on state again, because the secondary winding module is at the target off time at this time, so that the secondary winding module is in the forced off state, and further, when the primary winding module of the flyback converter is in the on state, the secondary winding is also in the on state, that is avoided, and the reliability and the through-state of the power supply operation are ensured.
Fig. 7 is a schematic structural diagram of an electronic device according to an embodiment of the present application. As shown in fig. 7, the electronic device 7 of this embodiment includes: at least one processor 70 (only one is shown in fig. 7), a memory 71 and a computer program 72 stored in the memory 71 and executable on the at least one processor 70, the processor 70 implementing the steps in any one of the flyback converter control method embodiments described above when executing the computer program 72.
It will be appreciated by those skilled in the art that fig. 7 is merely an example of the electronic device 7 and is not meant to be limiting of the electronic device 7, and may include more or fewer components than shown, or may combine certain components, or different components, such as may also include input-output devices, network access devices, etc.
The processor 70 may be a central processing unit (Central Processing Unit, CPU) and the processor 70 may be other general purpose processors, a digital signal processor (Digital Signal Processor, DSP), an application specific integrated circuit (Application Specific Integrated Circuit, ASIC), an off-the-shelf programmable gate array (Field-Programmable Gate Array, FPGA) or other programmable logic device, discrete gate or transistor logic, discrete hardware components, or the like. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like.
The memory 71 may in some embodiments be an internal storage unit of the electronic device 7, such as a hard disk or a memory of the electronic device 7. The memory 71 may in other embodiments also be an external storage device of the electronic device 7, such as a plug-in hard disk, a Smart Media Card (SMC), a Secure Digital (SD) Card, a Flash Card (Flash Card) or the like, which are provided on the electronic device 7. Further, the memory 71 may also include both an internal storage unit and an external storage device of the electronic device 7. The memory 71 is used for storing an operating system, application programs, boot loader (BootLoader), data, other programs, etc., such as program codes of the computer program. The memory 71 may also be used for temporarily storing data that has been output or is to be output.
The embodiment of the application also provides a computer readable storage medium, wherein the computer readable storage medium stores a computer program, and the computer program can realize the steps in the embodiment of the control method of any flyback converter when being executed by a processor.
Embodiments of the present application provide a computer program product which, when run on an electronic device, causes the electronic device to perform the steps of any of the above embodiments of the method of controlling a flyback converter.
It should be noted that, because the content of information interaction and execution process between the above devices/units is based on the same concept as the method embodiment of the present application, specific functions and technical effects thereof may be referred to in the method embodiment section, and will not be described herein.
The embodiment of the application also provides a computer readable storage medium, wherein the computer readable storage medium stores a computer program, and the computer program can realize the steps in the embodiment of the control method of any flyback converter when being executed by a processor.
Embodiments of the present application provide a computer program product which, when run on an electronic device, causes the electronic device to perform the steps of an embodiment of a control method that can implement any of the flyback converters described above.
It will be apparent to those skilled in the art that, for convenience and brevity of description, only the above-described division of the functional units and modules is illustrated, and in practical application, the above-described functional distribution may be performed by different functional units and modules according to needs, i.e. the internal structure of the apparatus is divided into different functional units or modules to perform all or part of the above-described functions. The functional units and modules in the embodiment may be integrated in one processing unit, or each unit may exist alone physically, or two or more units may be integrated in one unit, where the integrated units may be implemented in a form of hardware or a form of a software functional unit. In addition, the specific names of the functional units and modules are only for distinguishing from each other, and are not used for limiting the protection scope of the present application. The specific working process of the units and modules in the above system may refer to the corresponding process in the foregoing method embodiment, which is not described herein again.
In the foregoing embodiments, the descriptions of the embodiments are emphasized, and in part, not described or illustrated in any particular embodiment, reference is made to the related descriptions of other embodiments.
Those of ordinary skill in the art will appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware, or combinations of computer software and electronic hardware. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the solution. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present application.
In the embodiments provided in the present application, it should be understood that the disclosed control device and method of the flyback converter may be implemented in other manners. For example, the apparatus/electronic device embodiments described above are merely illustrative, e.g., the division of the modules or units is merely a logical function division, and there may be additional divisions in actual implementation, e.g., multiple units or components may be combined or integrated into another system, or some features may be omitted, or not performed. Alternatively, the coupling or direct coupling or communication connection shown or discussed may be an indirect coupling or communication connection via interfaces, devices or units, which may be in electrical, mechanical or other forms.
The units described as separate units may or may not be physically separate, and units shown 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 may be selected according to actual needs to achieve the purpose of the solution of this embodiment.
The above embodiments are only for illustrating the technical solution of the present application, and not for limiting the same; although the application has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present application, and are intended to be included in the scope of the present application.