A power module, a control circuit and an electronic device

Abstract

Embodiments of the present application provide a power module, a control circuit and an electronic device. One of the power modules is used for receiving alternating current and outputting direct current, and includes two input terminals, two output terminals, an inductor, a rectifier circuit and an output capacitor. The rectifier circuit includes a first bridge arm and a second bridge arm. A bridge arm midpoint of the first bridge arm is connected to one of the input terminals through the inductor, and a bridge arm midpoint of the second bridge arm is connected to the other input terminal. In response to an absolute value of a transient voltage of the alternating current rising to be greater than or equal to a working voltage threshold value, two controllable switch tubes of the first bridge arm are alternately and complementarily turned on or turned off. In response to the absolute value of the transient voltage of the alternating current falling from a peak value to be less than or equal to a standby voltage threshold value, at least one of the two controllable switch tubes of the first bridge arm remains turned off. The embodiments of the present application can simplify the circuit topology, reduce the volume of the power module, and improve the power supply efficiency.

Description

Technical Field

[0001] This application relates to the field of power supply technology, and in particular to a power supply module, control circuit, and electronic device. Background Technology

[0002] Existing electronic devices or power modules typically include rectifier circuits and power factor correction (PFC) circuits. During operation, this PFC circuit controls harmonics generated by the input current and corrects the power factor, reducing harmonics injected into the power grid. However, existing power modules or electronic devices with PFC circuits are complex in structure, have many components, and are large in size, which hinders the evolution of electronic devices or power modules towards high-power miniaturization and also affects their power supply efficiency. Summary of the Invention

[0003] This application provides a power supply module, a control circuit, and an electronic device, which can simplify the circuit topology, reduce the size of the power supply module, and improve power supply efficiency.

[0004] In a first aspect, embodiments of this application provide a power supply module for receiving AC power and outputting DC power, including two input terminals, two output terminals, an inductor, a rectifier circuit, and an output capacitor. The rectifier circuit includes a first bridge arm and a second bridge arm. The first bridge arm includes two controllable switching transistors. The midpoint of the first bridge arm is connected to one of the input terminals via the inductor, and the midpoint of the second bridge arm is connected to the other input terminal. The first bridge arm, the second bridge arm, and the output capacitor are connected in parallel between the two output terminals of the rectifier circuit. In response to the absolute value of the instantaneous voltage of the AC power received at the two input terminals rising to a value greater than or equal to a working voltage threshold, the two controllable switching transistors of the first bridge arm alternately and complementaryly turn on or off. In response to the absolute value of the instantaneous voltage of the AC power received at the two input terminals decreasing from a peak value to a value less than or equal to a standby voltage threshold, at least one of the two controllable switching transistors of the first bridge arm remains off.

[0005] In this embodiment, the rectifier circuit in the power module is a controllable rectifier circuit, and power factor correction can be achieved by adjusting the input of the rectifier circuit. The rectifier circuit includes a first bridge arm and a second bridge arm connected in parallel. During power supply, in response to the absolute value of the instantaneous AC voltage received at the two input terminals rising to a value greater than or equal to the operating voltage threshold, the two controllable switches of the first bridge arm alternately and complementaryly turn on or off, at which point the rectifier circuit operates in the operating state. In response to the absolute value of the instantaneous AC voltage received at the two input terminals falling from its peak value to a value less than or equal to the standby voltage threshold, at least one of the two controllable switches of the first bridge arm remains off, at which point the rectifier circuit operates in the standby state. Because the AC voltage changes periodically, during power supply, the rectifier circuit tracks the instantaneous AC voltage and compares the absolute value of the instantaneous voltage with the operating voltage threshold or the standby voltage threshold. In response to different comparison results, the rectifier circuit can alternately operate in the operating state or the standby state, thereby suppressing the input current harmonics of the power module. Compared to existing rectifier circuits that operate continuously in the working state, the rectifier circuit provided in this application embodiment can alternately operate in the working state or standby state, controlling the harmonics generated by the input current and achieving power factor correction. Furthermore, compared to the circuit structure of traditional power modules, the power module provided in this application embodiment reduces the original power correction conversion circuit, simplifies the circuit topology of the power module, and reduces the size of the power module.

[0006] In one possible implementation, the second bridge arm includes two controllable switches: in response to an instantaneous voltage of the alternating current being greater than or equal to 0, one of the controllable switches in the second bridge arm remains off and the other remains on; in response to an instantaneous voltage of the alternating current being less than 0, one of the controllable switches in the second bridge arm remains on and the other remains off.

[0007] In this embodiment, the two controllable switches in the second bridge arm need to be kept off when the AC power is in different input cycles to ensure that the rectifier circuit can convert the received AC power into DC power, thereby ensuring the stability of the power supply module.

[0008] In one possible implementation, at least one of the operating voltage threshold or the standby voltage threshold is adjusted in response to a comparison between the output power of the power module and a preset output power.

[0009] In existing technologies, to meet the power requirements of the output side, power factor correction circuits often reduce peak current or operate intermittently in Burst mode. However, reducing peak current means increasing the switching frequency in the power factor correction circuit, which increases the turn-off losses of the switching devices and the core losses. Intermittent operation in Burst mode results in excessively high switching frequency, low efficiency, and large output ripple. In the embodiments of this application, the operating time of the rectifier circuit in each cycle is controlled by controlling the operating voltage threshold or the standby voltage threshold to meet the power requirements of the output side. In this case, the peak current does not need to be reduced, and the switching frequency of the rectifier circuit will not be too high, nor will the output ripple increase.

[0010] In one possible implementation, in response to the power output power of the power module being less than the preset output power, at least one of the operating voltage threshold or the standby voltage threshold is increased; or, in response to the power output power of the power module being greater than or equal to the output power, at least one of the operating voltage threshold or the standby voltage threshold is decreased.

[0011] In this embodiment, when the output power of the power module is less than the preset output power, it can be understood as a decrease in output power. In this case, at least one of the operating voltage threshold or the standby voltage threshold can be increased, causing the absolute value of the instantaneous AC voltage of the rectifier circuit to rise to the operating voltage threshold more slowly, or causing the absolute value of the instantaneous AC voltage of the rectifier circuit to drop from its peak value to the standby voltage threshold more quickly. This reduces the operating time of the rectifier circuit in the power module, thereby reducing the output power. Conversely, when the output power of the power module is greater than or equal to the preset output power, it can be understood as an increase in output power. In this case, at least one of the operating voltage threshold or the standby voltage threshold can be decreased, increasing the operating time of the rectifier circuit in the power module, thereby increasing the output power.

[0012] In one possible implementation, the source of one controllable switch in the first bridge arm is connected to the drain of another controllable switch to form the midpoint of the first bridge arm; the source of one controllable switch in the second bridge arm is connected to the drain of another controllable switch to form the midpoint of the second bridge arm; the drains of one controllable switch in the first bridge arm and one controllable switch in the second bridge arm are connected to one output terminal; and the sources of the other controllable switch in the first bridge arm and the other controllable switch in the second bridge arm are connected to another output terminal.

[0013] In this embodiment, the source and drain terminals of two controllable switching transistors in the first bridge arm are connected to form the midpoint of the first bridge arm, and the source and drain terminals of two controllable switching transistors in the second bridge arm are connected to form the midpoint of the second bridge arm. The midpoints of the two bridge arms serve as the two input terminals of the power module to receive AC power, thereby ensuring that the circuit stably receives AC power and outputs DC power.

[0014] In one possible implementation, the power module further includes an isolated conversion circuit or a non-isolated conversion circuit; the isolated conversion circuit or the non-isolated conversion circuit is used to receive the DC power.

[0015] In this embodiment, the power module further includes an isolated converter circuit or a non-isolated converter circuit, which can act as a load and receive the output of the rectifier circuit, i.e., DC power. Furthermore, this embodiment can also adjust the operating frequency of the rectifier circuit by tracking the input voltage of the isolated converter circuit or the non-isolated converter circuit.

[0016] Secondly, embodiments of this application provide a control circuit for controlling the rectifier circuit of a power supply module. The power supply module receives AC power and outputs DC power. The power supply module includes two input terminals, two output terminals, an inductor, the rectifier circuit, and an output capacitor. The rectifier circuit includes a first bridge arm and a second bridge arm. The first bridge arm includes two controllable switching transistors. The midpoint of the first bridge arm is connected to one of the input terminals via the inductor. The midpoint of the second bridge arm is connected to the other input terminal. The first bridge arm, the second bridge arm, and the output capacitor are connected in parallel between the two output terminals of the rectifier circuit. Specifically, the control circuit is used to control the two controllable switching transistors of the first bridge arm to alternately and complementaryly turn on or off in response to the absolute value of the instantaneous voltage of the AC power received at the two input terminals rising to a value greater than or equal to a working voltage threshold. In response to the absolute value of the instantaneous voltage of the AC power received at the two input terminals falling from a peak value to a value less than or equal to a standby voltage threshold, at least one of the two controllable switching transistors of the first bridge arm is kept off.

[0017] In this embodiment, the control circuit can track the input voltage (AC) of the rectifier circuit of the power module, compare the instantaneous AC voltage with the operating voltage threshold or standby voltage threshold, and output a control signal to control the conduction state of the two controllable switches in the first bridge arm of the rectifier circuit in response to the comparison result. During the power supply process of the power module, the absolute value of the instantaneous AC voltage will change periodically, and the corresponding control circuit will control the isolated converter circuit to alternately operate in the operating state or standby state according to different comparison results, suppressing input current harmonics and achieving power factor correction.

[0018] In one possible implementation, the second bridge arm includes two controllable switches, and the control circuit is further configured to control one controllable switch in the second bridge arm to remain off and control the other controllable switch in the second bridge arm to remain on in response to an instantaneous voltage of the AC current being greater than or equal to 0; and to control one controllable switch in the second bridge arm to remain on and control the other controllable switch in the second bridge arm to remain off in response to an instantaneous voltage of the AC current being less than 0.

[0019] In this embodiment, the control circuit outputs different control signals to control the two controllable switches in the second bridge arm to remain on or off when the AC power is in different input cycles, thereby ensuring that the rectifier circuit can convert the received AC power into DC power and thus ensuring the stability of the power supply module.

[0020] In one possible implementation, the control circuit is further configured to adjust at least one of the operating voltage threshold or the standby voltage threshold in response to a comparison between the output power of the power module and a preset output power.

[0021] In this embodiment, in order to meet the power demand on the output side, the control circuit controls the operating time of the rectifier circuit in each cycle by adjusting the operating voltage threshold or the standby voltage threshold, so as to meet the power demand on the output side of the rectifier circuit, thereby reducing the switching frequency in the rectifier circuit while maintaining the peak current.

[0022] In one possible implementation, the control circuit is specifically configured to increase at least one of the operating voltage threshold or the standby voltage threshold in response to the output power of the power module being less than the preset output power; or, in response to the output power of the power module being greater than or equal to the preset output power, decrease at least one of the operating voltage threshold or the standby voltage threshold.

[0023] In this embodiment of the application, when the output power of the power module is less than the preset output power, it can be understood that the power demand on the output side is reduced. At this time, the control circuit increases at least one of the working voltage threshold or the standby voltage threshold to control the reduction of the working time of the rectifier circuit, thereby reducing the output power of the rectifier circuit.

[0024] Thirdly, embodiments of this application also provide a power supply module, including a rectifier circuit and a power factor correction circuit. The two input terminals of the rectifier circuit are used to receive alternating current (AC), and the two output terminals of the rectifier circuit are used to output direct current (DC). The power factor correction circuit is connected in series between the two output terminals of the rectifier circuit. The power factor correction circuit includes an inductor, a controllable switch, and an output capacitor. The source of the controllable switch is connected to one of the output terminals via the inductor, and the drain of the controllable switch is connected to the other output terminal. The output capacitor is connected in parallel between the source and drain of the controllable switch. In response to the absolute value of the instantaneous voltage of the AC or the voltage value of the DC rising to a value greater than or equal to a working voltage threshold, the controllable switch alternately turns on or off. In response to the absolute value of the instantaneous voltage of the AC or the voltage value of the DC falling from its peak value to a value less than or equal to a standby voltage threshold, the controllable switch remains off.

[0025] In one possible implementation, at least one of the operating voltage threshold or the standby voltage threshold is adjusted in response to a comparison between the output power of the power factor correction circuit and a preset output power.

[0026] In one possible implementation, in response to the output power of the power factor correction circuit being less than the preset output power, at least one of the operating voltage threshold or the standby voltage threshold is increased; or, in response to the output power of the power factor correction circuit being greater than or equal to the preset output power, at least one of the operating voltage threshold or the standby voltage threshold is decreased.

[0027] In one possible implementation, an isolated conversion circuit or a non-isolated conversion circuit is also included; the isolated conversion circuit or the non-isolated conversion circuit is used to receive the output of the rectifier circuit.

[0028] It should be understood that the power module provided in the third aspect of this application is consistent with the technical solution of the first or second aspect of this application. Its specific content and beneficial effects can be referred to the power module provided in the first aspect or the control circuit provided in the second aspect, and will not be repeated here.

[0029] Fourthly, this application embodiment also provides a power supply module, including a rectifier circuit and a series circuit. The two input terminals of the rectifier circuit are used to receive alternating current (AC), and the two output terminals of the rectifier circuit are used to output direct current (DC). The series circuit includes two controllable switching transistors. The source of one controllable switching transistor is connected to the drain of the other controllable switching transistor, the drain of one controllable switching transistor is connected to one of the output terminals, and the source of the other controllable switching transistor is connected to the other output terminal. In response to the absolute value of the instantaneous voltage of the AC or the voltage value of the DC rising to a value greater than or equal to the operating voltage threshold, the two controllable switching transistors alternately and complementaryly turn on or off. In response to the absolute value of the instantaneous voltage of the AC or the voltage value of the DC falling from its peak value to a value less than or equal to the standby voltage threshold, at least one of the two controllable switching transistors remains off.

[0030] In one possible implementation, an isolated converter circuit is also included, wherein the series circuit is a bridge arm of the isolated converter circuit; the isolated converter circuit includes one of a resonant converter circuit, a half-bridge forward converter circuit, an asymmetric half-bridge flyback converter circuit, or an active clamp flyback converter circuit.

[0031] In one possible implementation, the isolated converter circuit is an asymmetric half-bridge flyback converter circuit, the series circuit is a bridge arm of the asymmetric half-bridge flyback converter circuit, and the asymmetric half-bridge flyback converter circuit further includes a transformer, the transformer including a primary winding and a secondary winding; the same-name terminal of the primary winding is connected to the source of one of the controllable switches and the drain of another controllable switch, the opposite-name terminal of the primary winding is connected to another output terminal and the source of another controllable switch, and the same-name terminal of the primary winding is in the opposite direction to the same-name terminal of the secondary winding.

[0032] In one possible implementation, the series circuit further includes a clamping capacitor, the isolated converter circuit is an active clamp flyback converter circuit, the series circuit is a bridge arm of the active clamp flyback converter circuit, the active clamp flyback converter circuit further includes a transformer, the transformer includes a primary winding and a secondary winding; one end of the clamping capacitor is connected to an output terminal and an opposite terminal of the primary winding, the other end of the clamping capacitor is connected to the drain of a controllable switch, the same terminal of the primary winding is connected to the source of one controllable switch and the drain of another controllable switch, and the same terminal of the primary winding is in the opposite direction to the same terminal of the secondary winding.

[0033] It should be understood that the power module provided in the fourth aspect of this application is consistent with the technical solution of the first or second aspect of this application. Its specific content and beneficial effects can be referred to the power module provided in the first aspect or the control circuit provided in the second aspect, and will not be repeated here.

[0034] Fifthly, embodiments of this application provide an electronic device, including the power module as described in the first, third, or fourth aspects above, or the control circuit as described in the second aspect.

[0035] It should be understood that the electronic device provided in the fifth aspect of this application is consistent with the technical solution of the first or second aspect of this application. Its specific content and beneficial effects can be referred to the power module provided in the first aspect or the control circuit provided in the second aspect, which will not be repeated here. Attached Figure Description

[0036] To more clearly illustrate the technical solutions in the embodiments of this application or the background art, the accompanying drawings used in the embodiments of this application or the background art will be described below.

[0037] Figure 1 This is a schematic diagram of an application scenario provided in an embodiment of this application.

[0038] Figure 2 This is a schematic diagram of the structure of a power module provided in an embodiment of this application.

[0039] Figure 3 This is a schematic diagram of the circuit topology of a power supply module provided in an embodiment of this application.

[0040] Figure 4 This is a schematic diagram of the time-domain waveforms of the input and output of a power module provided in an embodiment of this application.

[0041] Figure 5 This is a schematic diagram of the time-domain waveforms of the input and output of another set of power modules provided in the embodiments of this application.

[0042] Figure 6 This is a schematic diagram of another power module provided in an embodiment of this application.

[0043] Figure 7 This is a schematic diagram of a control circuit provided in an embodiment of this application.

[0044] Figure 8 This is a schematic diagram of the structure of another power module provided in the embodiments of this application.

[0045] Figure 9 This is a schematic diagram of the circuit topology of another power module provided in an embodiment of this application.

[0046] Figure 10 This is a schematic diagram of the time-domain waveforms of the input and output of another power module provided in the embodiments of this application.

[0047] Figure 11This is a schematic diagram of the time-domain waveforms of the input and output of another power module provided in the embodiments of this application.

[0048] Figure 12 This is a schematic diagram of another power module provided in the embodiments of this application.

[0049] Figure 13 This is a schematic diagram of the circuit topology of another power supply module provided in the embodiments of this application.

[0050] Figure 14 This is a schematic diagram of the circuit topology of another power supply module provided in the embodiments of this application.

[0051] Figure 15 This is a schematic diagram of the circuit topology of another power supply module provided in the embodiments of this application. Detailed Implementation

[0052] The embodiments of this application will now be described with reference to the accompanying drawings.

[0053] The terms "first," "second," and "third," etc., used in the specification, claims, and accompanying drawings of this application are used to distinguish different objects, not to describe a specific order. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion. For example, a process, method, system, product, or apparatus that includes a series of steps or units is not limited to the listed steps or units, but may optionally include steps or units not listed, or may optionally include other steps or units inherent to these processes, methods, products, or apparatuses.

[0054] It should be understood that in this application, "at least one (item)" means one or more, and "more than" means two or more. "And / or" is used to describe the relationship between related objects, indicating that three relationships can exist. For example, "A and / or B" can indicate three cases: only A exists, only B exists, and both A and B exist simultaneously, where A and B can be singular or plural. The character " / " generally indicates that the preceding and following related objects are in an "or" relationship. "At least one (item) of the following" or similar expressions refer to any combination of these items, including any combination of single or plural items. For example, at least one (item) of a, b, or c can represent a, b, c, "a and b", "a and c", "b and c", or "a and b and c", where a, b, and c can be single or multiple.

[0055] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0056] "Coupled" and "connected" are used to refer to electrical connections, including direct connections via wires or terminals or indirect connections via other devices (such as inductors, capacitors, or resistors in the embodiments of this application). Therefore, "coupled" and "connected" should be considered as a broad type of electronic communication connection. Furthermore, the mutual coupling or direct coupling or connection shown or discussed can be indirect coupling or connection via interfaces, devices, units, or components, and can be communication, electrical, or other forms.

[0057] Each circuit or other component may be described or referred to as "for" performing one or more tasks. In this context, "for" is used to imply a structure by indicating that the circuit / component includes a structure (e.g., a circuit system) that performs one or more tasks during operation. Therefore, even when the specified circuit / component is currently inoperable (e.g., not turned on), it can still be referred to as "for performing that task." Circuits / components used with the term "for" include hardware, such as circuits that perform operations.

[0058] As used in this specification, the terms "component," "module," "system," etc., are used to refer to computer-related entities, hardware, firmware, combinations of hardware and software, software, or software in execution. For example, a component can be, but is not limited to, a process running on a processor, a processor, an object, an executable file, an execution thread, a program, and / or a computer. As illustrated, applications running on computing devices and computing devices can both be components. One or more components may reside in a process and / or an execution thread, and components may be located on a single computer and / or distributed among two or more computers. Furthermore, these components can be executed from various computer-readable media on which various data structures are stored. Components can communicate, for example, via local and / or remote processes based on signals having one or more data packets (e.g., data from two components interacting with another component between a local system, a distributed system, and / or a network, such as the Internet interacting with other systems via signals).

[0059] Figure 1 This is a schematic diagram illustrating an application scenario provided in an embodiment of this application. For example... Figure 1As shown, this application scenario may include a power module 10 and electronic devices 20. The power module 10 can receive power and supply power to the electronic devices 20. Furthermore, in some other possible embodiments, the power module 10 can simultaneously output at least two different voltages and supply power to multiple electronic devices 20.

[0060] For example, electronic device 20 may contain a battery. For example, electronic device 20 may be a smartphone, tablet computer, laptop computer, smartwatch, smart bracelet, smart helmet, smart glasses, Bluetooth headset, or other wearable device; it may also be an electric vehicle, drone, or robotic vacuum cleaner, etc. The battery in electronic device 20 may be any one of lead-acid, nickel-cadmium, nickel-iron, nickel-metal hydride, or lithium-ion batteries. For example, electronic device 20 may not contain a battery. For example, electronic device 20 may be a desktop computer, landline phone, radio frequency identification (RFID) card, etc.

[0061] Existing power modules typically include rectifier circuits and power factor correction (PFC) circuits. During operation, this PFC circuit controls harmonics generated by the input current and corrects the power factor, reducing harmonics injected into the power grid by electronic devices. However, existing power modules or electronic devices with PFC circuits are complex in structure, have many components, and are large in size, which restricts the evolution of electronic devices or power modules towards high-power miniaturization and also affects the power supply efficiency of electronic devices or power modules.

[0062] Figure 2 This is a schematic diagram of the structure of a power module provided in an embodiment of this application. The technical solution of this embodiment can be... Figure 2 Implemented in the structure shown in the example or a similar structure. For example... Figure 2 As shown, the power module 10 is used to receive AC power V1 and output DC power V2. The power module 10 includes two input terminals, two output terminals, and an inductor L. B 11 Rectifier circuit and output capacitor C B The power module 10 may also include a control circuit 12 for controlling the rectifier circuit 11.

[0063] Specifically, the rectifier circuit 11 includes a first bridge arm 101 and a second bridge arm 102. The first bridge arm 101 includes two controllable switching transistors. The midpoint of the first bridge arm 101 is connected to an inductor L. BOne of the input terminals is connected, and the midpoint of the second bridge arm 102 is connected to the other input terminal. The first bridge arm 101, the second bridge arm 102, and the output capacitor C are connected. B It is connected in parallel between the two output terminals of the rectifier circuit 11.

[0064] In response to the absolute value of the instantaneous voltage of the AC current V1 received at the two input terminals rising to a level greater than or equal to the operating voltage threshold, the rectifier circuit 11 operates in the operating state, and the two controllable switches of the first bridge arm 101 alternately and complementaryly turn on or off. In response to the absolute value of the instantaneous voltage of the AC current V1 received at the two input terminals falling from its peak value to a level less than or equal to the standby voltage threshold, the rectifier circuit 11 operates in the standby state, and at least one of the two controllable switches in the first bridge arm 101 remains off.

[0065] In addition, at least two controllable switches alternately and complementaryly conduct or turn off means that when two controllable switches alternately and complementaryly conduct, one controllable switch and the other controllable switch switch switch back and forth between the states of conduction and turn-off, if one controllable switch is on, the other controllable switch is off, and if one controllable switch is off, the other controllable switch is on.

[0066] Figure 3 This is a schematic diagram of the circuit topology of a power supply module provided in an embodiment of this application. The technical solution of this embodiment can... Figure 3 Implemented in the structure shown in the example or a similar structure. For example... Figure 3 As shown, the power module 10 includes a rectifier circuit 11 and a control circuit 12.

[0067] Specifically, one of the controllable switches in the first bridge arm 101 is a controllable switch Q. H The other controllable switch is the controllable switch Q. L One of the switching transistors in the second bridge arm 102 is switching transistor S. H The other switching transistor is switching transistor S. L The controllable switch Q in the first bridge arm 101 H The source and controllable switch Q L The drains of the transistors are connected to form the midpoint of the first bridge arm 101. The switching transistor S in the second bridge arm 102... H The source and the switch S L The drains of the transistors are connected to form the midpoint of the second bridge arm 102. The controllable switch Q in the first bridge arm 101... H The drain of the second bridge arm 102, the switching transistor S H The drain of the transistor is connected to an output terminal, and the controllable switch Q in the first bridge arm 101 is... L The source of the second bridge arm, the switch S L The source is connected to another output terminal.

[0068] In one embodiment, a controllable switch Q in the first bridge arm 101 H and another controllable switch Q L These are two controllable switching transistors in the rectifier circuit 11. The rectifier circuit 11 operates in the working state when the absolute value of the instantaneous voltage of the AC current V1 received at the two input terminals rises to a value greater than or equal to the operating voltage threshold. The rectifier circuit 11 operates in the standby state when the absolute value of the instantaneous voltage of the AC current V1 received at the two input terminals drops from its peak value to a value less than or equal to the standby voltage threshold. Here, the two input terminals can be understood as the two input terminals of the rectifier circuit 11. When the rectifier circuit 11 operates in the working state, a controllable switching transistor Q in the first bridge arm 101... H and another controllable switch Q L Alternating complementary conduction or cutoff. The rectifier circuit 11 operates in standby mode, with a controllable switch Q in the first bridge arm 101... H and another controllable switch Q L At least one of them remains off. When the rectifier circuit 11 is operating in a working state or a standby state, the control circuit 12 can output two control signals G1 and G2 to control one of the controllable switching transistors Q in the first bridge arm 101 of the rectifier circuit 11, respectively. H and another controllable switch Q L Turning the circuit on or off. For details regarding control circuit 12, please refer to the following: Figure 7 The relevant descriptions of the embodiments are not described here.

[0069] In one embodiment, a controllable switch Q in the first bridge arm 101 H and another controllable switch Q L At least one of them remains off, which can be understood as the two controllable switches Q of the first bridge arm 101 remaining off when the rectifier circuit 11 is in standby mode. H and Q H The main controllable switch must be kept off at least, while the auxiliary controllable switch can be kept off or turned on occasionally. (As described above) Figure 3 In the circuit structure shown, in response to the instantaneous voltage of the AC current V1 being greater than or equal to 0, i.e., when the AC current V1 is in the positive half-cycle, the other controllable switch Q in the first bridge arm 101... L The main controllable switch of the rectifier circuit 11 is a single controllable switch Q. H This is an auxiliary controllable switch for the rectifier circuit 11. When the rectifier circuit 11 is in standby mode, the other controllable switch Q in the first bridge arm 101... L The controllable switch Q in the first bridge arm 101 needs to be kept off. HIt can remain off or be turned on occasionally. In response to the instantaneous voltage of the AC current V1 being greater than or equal to 0, i.e., when the AC current V1 is in the negative half-cycle, a controllable switch Q in the first bridge arm 101... H The main controllable switch of rectifier circuit 11 is Q, and the other controllable switch is Q. L This is an auxiliary controllable switch transistor for the rectifier circuit 11. When the rectifier circuit 11 is operating in standby mode, one of the controllable switch transistors Q in the first bridge arm 101... H The other controllable switch Q in the first bridge arm 101 needs to be kept off. L It can be kept off or turned on occasionally.

[0070] In one embodiment, a switching transistor S in the second bridge arm 102 H and another switching transistor S L It can be a controllable switch or an uncontrollable diode. Specifically, one of the controllable switches S in the second bridge arm 102... H And another controllable switch S L When all are controllable switches, in response to the instantaneous voltage of the AC current V1 being greater than or equal to 0, i.e., when the AC current V1 is in the positive half-cycle, one of the controllable switches S in the second bridge arm 102... H The other controllable switch S in the second bridge arm 102 remains off. L The circuit remains on. In response to a momentary voltage less than 0 in the AC current V1, i.e., during the negative half-cycle of AC current V1, a controllable switch S in the second bridge arm 102... H Maintaining conduction, another controllable switch S in the second bridge arm 102 L Keep them off. The two controllable switches in the second bridge arm 102 need to remain off during different input cycles of the AC power to ensure that the rectifier circuit can convert the received AC power into DC power, thereby ensuring the stability of the power supply module. The control circuit 12 can also output two control signals G3 and G4 to control one of the controllable switches S in the second bridge arm 102 of the rectifier circuit 11. H And another controllable switch S L Turning the circuit on or off. For details regarding control circuit 12, please refer to the following: Figure 7 The relevant descriptions of the embodiments shown are not described here.

[0071] In one embodiment, a switching transistor S in the second bridge arm 102 H and another switching transistor S L This is an uncontrollable diode. In response to the instantaneous voltage of the AC current V1 being greater than or equal to 0, i.e., during the positive half-cycle of the AC current V1, one of the uncontrollable diodes S in the second bridge arm 102...H Turn off, another uncontrollable diode S in the second bridge arm 102 L The circuit is turned on. In response to the instantaneous voltage of the AC current V1 being less than 0, i.e., during the negative half-cycle of AC current V1, the current direction is opposite to the current direction during the positive half-cycle of AC current V1. Therefore, an uncontrolled diode S in the second bridge arm 102... H Conduction occurs, and another uncontrollable diode S in the second bridge arm 102 is turned on. L Turn off. The two switching transistors in the second bridge arm 102 need to be kept off when the AC power is in different input cycles to ensure that the rectifier circuit can convert the received AC power into DC power, thereby ensuring the stability of the power supply module.

[0072] It should be noted that the controllable switching transistor involved in this application and the following related embodiments can be a metal-oxide-semiconductor field-effect transistor (MOSFET). For example, it can be an NMOS transistor or a PMOS transistor. This application does not impose specific limitations on the type of controllable switching transistor.

[0073] Figure 4 This is a schematic diagram of the time-domain waveforms of the input and output of a power module provided in an embodiment of this application. For example... Figure 4 As shown, the alternating current V1 serves as the input to the rectifier circuit 11, exhibiting a sinusoidal variation over time. The direct current V2 output by the rectifier circuit 11 follows the alternating current V1 and varies periodically. The rectifier circuit 11 operates in either a working state or a standby state based on a comparison between the absolute values ​​of the instantaneous voltages of the alternating current V1 received at the two input terminals and the operating voltage threshold. Similarly, the rectifier circuit 11 operates in either a working state or a standby state based on a comparison between the absolute values ​​of the instantaneous voltages of the alternating current V1 received at the two input terminals and the standby voltage threshold.

[0074] It should be noted that, to meet the power supply requirements of the power module 10 and to allow the rectifier circuit 11 to alternate between operating and standby states during power supply, the instantaneous voltage of the AC current V1 is compared with the operating voltage threshold as the input voltage gradually increases, and the instantaneous voltage of the AC current V1 is compared with the standby voltage threshold as the input voltage gradually decreases. This input voltage can be understood as the instantaneous voltage of the AC current received at the two input terminals. The operating voltage threshold and the standby voltage threshold are independent of each other. This application does not specifically limit the magnitudes of the operating voltage threshold and the standby voltage threshold in its embodiments.

[0075] For example, as the absolute value of the instantaneous voltage of AC V1 gradually increases, the absolute value of the instantaneous voltage of AC V1 is compared with the operating voltage threshold. In response to the absolute value of the instantaneous voltage of AC V1 gradually increasing but still being less than the operating voltage threshold, a controllable switch Q in the first bridge arm 101... H and another controllable switch Q L At least one of them remains off. In response to the absolute value of the instantaneous voltage of AC V1 rising to greater than or equal to the operating voltage threshold, a controllable switch Q in the first bridge arm 101... H and another controllable switch Q L Alternately and complementaryly turn on or off.

[0076] As the absolute value of the instantaneous voltage of AC V1 gradually decreases from its peak value, the absolute value of the instantaneous voltage of AC V1 is compared with the standby voltage threshold. In response to the absolute value of the instantaneous voltage of AC V1 gradually decreasing from its peak value but still exceeding the standby voltage threshold, a controllable switch Q in the first bridge arm 101... H and another controllable switch Q L Alternately and complementaryly turn on or off.

[0077] In response to the absolute value of the instantaneous voltage of AC V1 dropping from its peak value to less than or equal to the standby voltage threshold, a controllable switch Q in the first bridge arm 101... H and another controllable switch Q L At least one of them remains off.

[0078] like Figure 4 As shown, for AC voltage V1, the standby time T is the period from 0 to t1. off The rectifier circuit 11 operates in standby mode, and the input current I of the power supply module 10 is... LB The value is 0. The working time T is during the period t1-t2. on The rectifier circuit 11 is operating in the working state, and the input current I of the power supply module 10 is... LB Not zero. The standby time T is during the period t2-t4. off The rectifier circuit 11 operates in standby mode, and the input current I of the power supply module 10 is... LB The value is 0. The working time T is during the period t4-t6. on The rectifier circuit 11 is operating in the working state, and the input current I of the power supply module 10 is... LB It is not zero. It should be noted that the input current I of power module 10 is... LB This can be understood as the current flowing through inductor L B The current.

[0079] In one implementation, in response to a comparison between the output power of the power module and a preset output power, at least one of the operating voltage threshold or the standby voltage threshold is adjusted. In the prior art, to meet the power demands of the output side, existing power factor correction circuits often reduce peak current or operate intermittently in Burst mode. However, reducing peak current means increasing the switching frequency in the power factor correction circuit, which increases the turn-off losses of the switching devices and the core losses. Intermittent operation in Burst mode results in excessively high switching frequency, low efficiency, and large output ripple. In this embodiment, the power module 10 not only achieves power factor correction but also controls the operating time of the rectifier circuit in each cycle by controlling the operating voltage threshold or the standby voltage threshold to meet the power demands of the output side, reducing the switching frequency while maintaining a high peak current.

[0080] In one embodiment, in response to the output power of the power module 10 being less than a preset output power, at least one of the operating voltage threshold or the standby voltage threshold is increased. When the output power of the power module 10 is less than the preset output power, it can be understood that the power demand on the output side is reduced. At this time, at least one of the operating voltage threshold or the standby voltage threshold can be increased, so that the absolute value of the instantaneous voltage of the rectifier circuit 11 on the AC power V1 rises to the operating voltage threshold more slowly, or so that the absolute value of the instantaneous voltage of the rectifier circuit 11 on the AC power V1 drops from the peak value to the standby voltage threshold more quickly, thereby reducing the operating time of the rectifier circuit 11 in the power module 10, and thus the equivalent power on the output side is reduced accordingly throughout the entire input cycle.

[0081] In one embodiment, in response to the output power of the power module 10 being greater than or equal to a preset output power, at least one of the operating voltage threshold or the standby voltage threshold is reduced. When the output power of the power module 10 is greater than or equal to the preset output power, it can be understood that the power demand on the output side increases. At this time, at least one of the operating voltage threshold or the standby voltage threshold can be reduced, so that the absolute value of the instantaneous voltage of the rectifier circuit 11 on the AC power V1 rises to the operating voltage threshold more quickly, or so that the absolute value of the instantaneous voltage of the rectifier circuit 11 on the AC power V1 decreases from the peak value to the standby voltage threshold more slowly, thereby reducing the operating time of the rectifier circuit 11 in the power module 10, and thus the equivalent power on the output side is reduced accordingly throughout the entire input cycle.

[0082] As mentioned above Figure 4 As shown, when the instantaneous voltage of AC V1 gradually increases, the absolute value of the instantaneous voltage of AC V1 is compared with the operating voltage threshold. In response to the absolute value of the instantaneous voltage of AC V1 received at both input terminals rising to be greater than or equal to the operating voltage threshold, a controllable switch Q in the first bridge arm 101...H and another controllable switch Q L Alternating complementary on / off states control the input current I of power module 10. LB Not zero. As the instantaneous voltage of AC V1 gradually decreases from its peak value, the absolute value of the instantaneous voltage of AC V1 is compared with the standby voltage threshold. In response to the absolute value of the instantaneous voltage of AC V1 received at both input terminals decreasing from its peak value to less than or equal to the standby voltage threshold, a controllable switch Q in the first bridge arm 101... H and another controllable switch Q L At least one of them remains off, and the input current I of power module 10 LB The value is 0. As mentioned above, the instantaneous voltage of AC V1 changes periodically throughout the entire AC cycle. In this embodiment, the rectifier circuit 11 can be controlled to operate for a specific time T throughout the entire AC cycle. on The length of the [unclear] is used to control the output power on the output side.

[0083] Figure 5 This is a schematic diagram of the time-domain waveforms of another set of power module inputs and outputs provided in an embodiment of this application. For example... Figure 5 As shown, when the output power of the power module 10 is less than the preset output power, at least one of the operating voltage threshold or the standby voltage threshold is increased; that is, in this embodiment, the operating voltage threshold is greater than the aforementioned threshold. Figure 4 The operating voltage threshold in the illustrated embodiment is greater than the standby voltage threshold in this embodiment. Figure 4 The standby voltage threshold in the illustrated embodiment. Compared to the above... Figure 4 The embodiment shown in this application reduces the operating time of the rectifier circuit 11 in the working state, thereby reducing the output power on the output side.

[0084] In one embodiment, the power module further includes an isolated conversion circuit or a non-isolated conversion circuit. The isolated conversion circuit or the non-isolated conversion circuit is used to receive the output of the rectifier circuit. Figure 6 This is a schematic diagram of another power module provided in an embodiment of this application. For example... Figure 6 As shown, the power module 10 also includes an isolated converter circuit 13, which can act as a load and receive the output of the rectifier circuit 11. The power module 10 may also include a non-isolated converter circuit, which can act as a load, receive the output of the rectifier circuit 11, and supply power to the electronic device 20. This non-isolated converter circuit is not shown.

[0085] For example, the isolated converter circuit 13 can be one of the following: resonant converter LLC, asymmetrical half-bridge flyback converter (AHB), half-bridge forward converter, single-ended flyback converter, and active clamp flyback converter (ACF). This application embodiment does not impose specific restrictions on the type of isolated converter circuit.

[0086] For example, the non-isolated conversion circuit can be one of a boost converter, a buck converter, or a buck-boost converter. This application does not impose specific limitations on the type of non-isolated conversion circuit.

[0087] In addition, the power module 10 may also include an isolated converter circuit 13 and a non-isolated converter circuit. The isolated converter circuit 13 can serve as the load of the rectifier circuit 11, receive the output of the rectifier circuit 11, and input the output of the rectifier circuit 11 into the non-isolated converter circuit after voltage conversion. The non-isolated converter circuit receives the input of the isolated converter circuit 13 and supplies power to the electronic device 20.

[0088] Figure 7 This is a schematic diagram of a control circuit provided in an embodiment of this application. The technical solution of this embodiment can... Figure 7 Implemented in the structure shown in the example or a similar structure.

[0089] like Figure 7 As shown, the control circuit 12 is used to control the rectifier circuit 11 of the power module 10. The power module 10 is used to receive AC power V1 and output DC power V2. The power module 10 includes two input terminals, two output terminals, and an inductor L. B 11 Rectifier circuit and output capacitor C B The rectifier circuit 11 includes a first bridge arm 101 and a second bridge arm 102. The first bridge arm 101 includes two controllable switching transistors. The midpoint of the first bridge arm 101 is connected to an inductor L. B One of the input terminals is connected, and the midpoint of the second bridge arm 102 is connected to the other input terminal. The first bridge arm 101, the second bridge arm 102, and the output capacitor C are connected. B It is connected in parallel between the two output terminals of the rectifier circuit 11.

[0090] Specifically, the control circuit 12 is used to output a control signal G to control the rectifier circuit 11 to operate in a working state or a standby state in response to the comparison result between the absolute value of the instantaneous voltage of the AC power V1 received at the two input terminals and a preset voltage threshold. The preset voltage threshold includes a working voltage threshold and a standby voltage threshold.

[0091] Specifically, the power module 10 can be as described above. Figures 2-3 The power module 10 provided in this application embodiment can sample and obtain the absolute value of the instantaneous voltage of AC power V1 through a sampling circuit in the power module 10 (not shown). The control circuit 12 compares the absolute value of the instantaneous voltage of AC power V1 received at the two input terminals with a preset voltage threshold. In response to different comparison results, at least one different control signal G is output to control the two controllable switches in the first bridge arm 101 to turn on or off respectively. For example, in response to the absolute value of the instantaneous voltage of AC power V1 received at the two input terminals rising to a level greater than or equal to the operating voltage threshold, the two controllable switches in the first bridge arm 101 are controlled to alternately and complementaryly turn on or off; in response to the absolute value of the instantaneous voltage of AC power V1 received at the two input terminals falling from the peak value to a level less than or equal to the standby voltage threshold, at least one of the two controllable switches in the first bridge arm 101 is controlled to remain off. The control circuit provided in this application embodiment can control the rectifier circuit 11 to alternately operate in the operating state or standby state, suppressing input current harmonics and achieving the purpose of power factor correction.

[0092] The preset voltage thresholds include a working voltage threshold and a standby voltage threshold. The control circuit 12 outputs two first control signals in response to the absolute value of the instantaneous voltage of the AC current V1 received at the two input terminals rising to a value greater than or equal to the working voltage threshold. It also outputs at least one second control signal in response to the absolute value of the instantaneous voltage of the AC current V1 received at the two input terminals falling from its peak value to a value less than or equal to the standby voltage threshold. The two first control signals are used to control the two controllable switches of the first bridge arm 101 to alternately and complementaryly turn on or off, respectively, and the two second control signals are used to control at least one of the two controllable switches of the first bridge arm 101 to remain off.

[0093] For example, the control circuit 12 tracks the instantaneous voltage of AC power V1 received at the two input terminals of the power supply module 10, and compares the instantaneous voltage of AC power V1 with a working voltage threshold or a standby voltage threshold. In response to the absolute value of the instantaneous voltage of AC power V1 rising above the working voltage threshold, two first control signals are output to control one of the controllable switching transistors Q in the first bridge arm 101 of the rectifier circuit 11. H and another controllable switch Q L The rectifier circuit 11 operates in a working state by alternately switching on and off. In response to the absolute value of the instantaneous voltage of the AC current V1 decreasing from its peak value to below the standby voltage threshold, at least one second control signal is output to control a controllable switch Q of the first bridge arm 101 of the rectifier circuit 11. H and another controllable switch Q L At least one controllable switch is kept off, and the rectifier circuit 11 can operate in standby mode.

[0094] In one embodiment, the second bridge arm 102 includes two controllable switches, and the control circuit 12 is further configured to output a second control signal to control one of the controllable switches S in the second bridge arm 102 in response to an instantaneous voltage of AC V1 being greater than or equal to 0. H Keep it off, and output a third control signal to control another controllable switch S in the second bridge arm 102. L The circuit remains on. In response to a momentary voltage drop of less than 0 in AC current V1, a third control signal is output to control a controllable switch S in the second bridge arm 102. H Keeping it on, it outputs a second control signal to control another controllable switch S in the second bridge arm 102. L Keep it off.

[0095] Understandably, the first control signal can be an alternating high and low level pulse signal, which can control the controllable switch to turn on or off alternately. The second control signal can be a continuous low level signal, which can control the controllable switch to remain off. The third control signal can be a continuous high level signal, which can control the controllable switch to remain on.

[0096] It should be noted that the control signal involved in the embodiments of this application and the following related embodiments is one of the first control signal, the second control signal, or the third control signal.

[0097] It is also understood that the control circuit 12 in this application embodiment can compare the absolute value of the instantaneous voltage of AC V1 with a preset voltage threshold using a comparator or other related devices. This application embodiment does not make specific limitations in this regard.

[0098] In one embodiment, the control circuit 12 is further configured to adjust at least one of the operating voltage threshold or the standby voltage threshold in response to a comparison between the output power of the power module and a preset output power. In this embodiment, by adjusting the magnitude of the operating voltage threshold or the standby voltage threshold to control the operating time of the rectifier circuit 11 in each cycle, the power demand on the output side is met. This allows for maintaining peak current while preventing the switching frequency of the rectifier circuit 11 from becoming excessively high, thereby reducing output ripple on the output side.

[0099] For example, in response to the output power of the power module being less than the preset output power, at least one of the operating voltage threshold or the standby voltage threshold is increased, such that the operating time T of the rectifier circuit 11 is extended. on Reduce standby time T offIncrease, thereby reducing the power on the output side. In response to the power module's output power being greater than or equal to the preset output power, decrease at least one of the operating voltage threshold or the standby voltage threshold, such that the operating time T of the rectifier circuit 11 is reduced. on Increase standby time T off This reduces the power output, thereby increasing the power on the output side.

[0100] In one embodiment, the control circuit 12 is further configured to adjust the frequency or duty cycle of the first control signal in response to a comparison between the voltage across the output capacitor and a preset output voltage.

[0101] It is understandable that the frequency of the first control signal refers to the number of times the signal transitions from a high level to a low level and back to a high level per second, and the duty cycle of the first control signal is the ratio between the duration of the high level and the duration of the low level. For example, the two first control signals output by the control circuit respectively control a controllable switch Q in the first bridge arm 101 of the rectifier circuit 11. H and another controllable switch Q L Alternating complementary conduction or cutoff. Response to output capacitor C. B The comparison between the voltage at both ends and the preset output voltage requires adjusting the frequency or duty cycle of the first control signal to control the frequency or duty cycle of the controllable switch to alternately turn on or off, thereby controlling the operating frequency of the rectifier circuit 11 and improving the stability of the output of the rectifier circuit 11.

[0102] For example, in response to the output capacitor C B When the voltage across the terminals is less than the preset output voltage, it is necessary to increase the input current and the output capacitor C. B When the voltage across the terminals is greater than or equal to the preset output voltage, the input current needs to be reduced. Therefore, in response to the output capacitor C B If the voltage across the output capacitor is less than the preset output voltage, the frequency of the first control signal is decreased or the duty cycle of the first control signal is increased, thereby lengthening the conduction time of the two controllable switches in the first bridge arm 101. If the voltage across the output capacitor is greater than or equal to the preset output voltage, the frequency of the first control signal is increased or the duty cycle of the first control signal is decreased, thereby shortening the conduction time of the two controllable switches in the first bridge arm 101.

[0103] Furthermore, the embodiments of this application do not specifically limit the preset output voltage, and the magnitude of the preset output voltage can be adjusted accordingly based on the load.

[0104] For example, the load of the rectifier circuit 11 also affects the frequency and duty cycle of the two controllable switches in the first bridge arm 101. Specifically, when the load of the rectifier circuit 11 increases or the load impedance is greater than or equal to a preset value, the input current needs to be increased; when the load of the rectifier circuit 11 decreases or the load impedance is less than the preset value, the input current needs to be decreased to meet the power requirements of the output side. Therefore, in response to an increase in load, the frequency of the first control signal is decreased or the duty cycle of the first control signal is increased, thus lengthening the conduction time of the two controllable switches in the first bridge arm 101. In response to a decrease in load, the frequency of the first control signal is increased or the duty cycle of the first control signal is decreased, thus shortening the conduction time of the two controllable switches in the first bridge arm 101.

[0105] It should be noted that the adjustment of the frequency and duty cycle of the first control signal mentioned above is only a possible scenario under the control variable. In actual operation, in order to meet the power requirements on the output side and reduce the loss of the controllable switching transistor, the adjustment of the frequency and duty cycle of the first control signal needs to be made according to the actual changes in the circuit.

[0106] In one embodiment, the control circuit includes a drive circuit connected to the gate of a controllable switch to control the switching on or off of the controllable switch. For example, the drive circuit is connected to the gates of two controllable switches in the first bridge arm 101 and outputs control signals to control the switching on or off of the two controllable switches in the first bridge arm 101 respectively. It should be noted that one controllable switch corresponds to one control signal, which can be one of a first control signal, a second control signal, and a third control signal, as described above. Figure 3 As shown, a controllable switch Q in the first bridge arm 101 H Receive control signal G1, another controllable switch Q in the first bridge arm 101 L Receive control signal G2, a controllable switch S in the second bridge arm 102 H Receive control signal G3, another controllable switch S in the second bridge arm 102 L Receive control signal G4. Furthermore, this application does not impose specific limitations on the specific circuit structure of the drive circuit.

[0107] Figure 8 This is a schematic diagram of another power module structure provided in the embodiments of this application. The technical solutions of the embodiments of this application can be used in... Figure 8 Implemented in the structure shown in the example or a similar structure. For example... Figure 8 As shown, the power module 10 includes a rectifier circuit 11 and a power factor correction circuit 14.

[0108] The rectifier circuit 11 has two input terminals for receiving AC power V1 and two output terminals for outputting DC power V2. A power factor correction circuit 14 is connected in series between the two output terminals of the rectifier circuit 11. The power factor correction circuit 14 receives the output of the rectifier circuit 11 and outputs a voltage V. B The power factor correction circuit includes an inductor, a controllable switch, and an output capacitor. The source of the controllable switch is connected to one output terminal via the inductor, and the drain of the controllable switch is connected to the other output terminal. The output capacitor is connected in parallel between the source and drain of the controllable switch.

[0109] Figure 9 This is a schematic diagram of the circuit topology of another power module provided in an embodiment of this application. The technical solution of this embodiment can be... Figure 8 Implemented in the structure shown in the example or a similar structure. For example... Figure 9 As shown, the power module 10 includes a rectifier circuit 11 and a power factor correction circuit 14.

[0110] Specifically, the rectifier circuit 11 receives AC power V1 and outputs DC power V2 to provide the input voltage for the power factor correction circuit 14. For example... Figure 9 As shown, the rectifier circuit 11 in this embodiment is a full-bridge uncontrolled rectifier circuit. The rectifier circuit 11 includes four uncontrolled rectifier diodes D1, D2, D3, and D4. The anode of rectifier diode D1 is connected to the cathode of rectifier diode D2 and serves as one input terminal of the rectifier circuit 11. The anode of rectifier diode D3 is connected to the cathode of rectifier diode D4 and serves as the other input terminal of the rectifier circuit 11. The cathode of rectifier diode D1 is connected to the cathode of rectifier diode D3 and serves as one output terminal of the rectifier circuit 11. The anode of rectifier diode D2 is connected to the anode of rectifier diode D4 and grounded, serving as the other input terminal of the rectifier circuit 11. Exemplarily, the rectifier circuit 11 can also be an active rectifier circuit or a controlled rectifier circuit; this embodiment does not specifically limit the type of rectifier circuit 11.

[0111] like Figure 9 As shown, the power factor correction circuit 14 includes an inductor L B A controllable switch Q1 and an output capacitor C B The power factor correction circuit 14 also includes a diode D. The source of a controllable switching transistor Q1 is connected to an inductor L. B Connect one output terminal, connect the drain of a controllable switching transistor Q1 to the other output terminal, and connect the output capacitor C. B A diode D is connected in parallel between the source and drain of a controllable switch Q1, and a diode D is connected in series with the output capacitor C. B The output capacitor C is connected between the source of the controllable switch Q1 and the cathode of the diode D.B The positive terminal. This controllable switch Q1 can also be referred to as the first controllable switch Q1.

[0112] In this configuration, in response to the absolute value of the instantaneous voltage of AC V1 or the voltage value of DC V2 rising to a level greater than or equal to the operating voltage threshold, the first controllable switch Q1 alternately turns on or off. In response to the absolute value of the instantaneous voltage of AC V1 or the voltage value of DC V2 falling from its peak value to a level less than or equal to the standby voltage threshold, the first controllable switch Q1 remains off. During this alternating on and off state of the first controllable switch Q1, the power factor correction circuit 14 operates in the working state. During this standby state of the first controllable switch Q1 remaining off, the power factor correction circuit 14 operates in the standby state.

[0113] Figure 10 This is a schematic diagram of the time-domain waveforms of the input and output of another power module provided in an embodiment of this application. The technical solution of this embodiment can... Figure 9 Implemented in the structure shown in the example or a similar structure. For example... Figure 10 As shown, the rectifier circuit 11 receives AC power V1 and outputs DC power V2, and the power factor correction circuit 14 receives the output of the rectifier circuit 11 and outputs a voltage V. B Among them, the current flowing through inductor L B This is the input current of the power supply module 10.

[0114] Specifically, in response to the absolute value of the instantaneous voltage of AC V1 or the voltage value of DC V2 rising to a level greater than or equal to the operating voltage threshold, the first controllable switch Q1 alternately turns on or off. At this time, the inductor L... B Following the alternating excitation and demagnetization of the first controllable switch Q1, the output capacitor C... B The circuit alternately charges or discharges following the first controllable switch Q1. When the first controllable switch Q1 is turned on, the output of the rectifier circuit 11 directly supplies power to the inductor L. B Charging. When the first controllable switch Q1 is turned off, the inductor L... B The energy stored in the capacitor will be supplied to the output capacitor C through diode D. B During discharge, the output of rectifier circuit 11 also supplies power to output capacitor C through diode D. B Discharge, the two are superimposed, to achieve voltage boost conversion. In response to the absolute value of the instantaneous voltage of AC V1 or the voltage value of DC V2 dropping from its peak to less than or equal to the standby voltage threshold, the first controllable switch Q1 remains off, and the power factor correction circuit 14 operates in standby mode. At this time, the first controllable switch Q1 is off, and the inductor L... B Demagnetization, with only the input of rectifier circuit 11 providing the output voltage V of power factor correction circuit 14. B .

[0115] like Figure 10 As shown, for AC power V1 or DC power V2, the standby time T is the period from 0 to t1. off The rectifier circuit 11 operates in standby mode, and the input current I of the power supply module 10 is... LB The value is 0. The working time T is during the period t1-t2. on The rectifier circuit 11 is operating in the working state, and the input current I of the power supply module 10 is... LB Not zero. The standby time T is during the period t2-t4. off The rectifier circuit 11 operates in standby mode, and the input current I of the power supply module 10 is... LB The value is 0. The working time T is during the period t4-t6. on The rectifier circuit 11 is operating in the working state, and the input current I of the power supply module 10 is... LB It is not zero. It should be noted that the input current I of power module 10 is... LB This can be understood as the current flowing through inductor L B The current.

[0116] In one implementation, the power module 10 further includes a control circuit 12, which controls the power factor correction circuit 14 to operate in a working state or a standby state. For example... Figure 9 As shown, the control circuit outputs a control signal G to control the first controllable switch Q1 to turn on or off. For example, in response to the absolute value of the instantaneous voltage of AC V1 or the voltage value of DC V2 rising to a level greater than or equal to the operating voltage threshold, the control signal G is an alternating high and low level pulse signal used to control the first controllable switch Q1 to alternately turn on or off. In response to the absolute value of the instantaneous voltage of AC V1 or the voltage value of DC V2 falling from its peak value to a level less than or equal to the standby voltage threshold, the control signal G is a continuously low level signal used to keep the first controllable switch Q1 off.

[0117] In one implementation, a controllable switch in the power factor correction circuit 14 also accommodates a critical conduction mode (CRM). Specifically, in response to inductor L... B Corresponding input current I LB When the voltage crosses zero and the absolute value of the instantaneous voltage of AC V1 or DC V2 rises to a value greater than or equal to the operating voltage threshold, the first controllable switch Q1 alternately turns on or off. This is in response to the inductor L... B Corresponding input current I LB When the peak voltage is reached and the absolute value of the instantaneous voltage of AC V1 or the voltage value of DC V2 drops from the peak to less than or equal to the standby voltage threshold, the first controllable switch Q1 remains off. When the inductor L... B Corresponding input current ILB At zero crossing, the absolute value of the instantaneous voltage of AC V1 or DC V2 is compared with the working voltage threshold. If the absolute value of the instantaneous voltage of AC V1 or DC V2 rises to be greater than or equal to the working voltage threshold, the first controllable switch Q1 alternately turns on or off, the inductor is energized, and the inductor L... B Corresponding input current I LB Rise. When inductance L B Corresponding input current I LB After reaching the peak current, the absolute value of the instantaneous voltage of AC V1 or the voltage value of DC V2 is compared with the standby voltage threshold. If the absolute value of the instantaneous voltage of AC V1 or the voltage value of DC V2 drops from the peak to less than or equal to the standby voltage threshold, the first controllable switch Q1 remains off, and the inductor L... B Corresponding input current I LB The diode D provides freewheeling, and the inductor is demagnetized. The inductor L... B Corresponding input current I LB Decrease until inductance L B Corresponding input current I LB It dropped to 0 again.

[0118] In one implementation, in response to a comparison between the output power of the power factor correction circuit 14 and a preset output power, at least one of the operating voltage threshold or the standby voltage threshold is adjusted. When the output power of the power factor correction circuit 14 is greater than or equal to the preset output power, it can be understood that the power factor correction circuit 14 is operating in a heavy-load mode, requiring a higher output power to be provided to the output side. When the output power of the power factor correction circuit 14 is less than the preset output power, it can be understood that the power factor correction circuit 14 is operating in a light-load mode or an unloaded mode, requiring a lower output power to be provided to the output side. This embodiment controls the operating time of the rectifier circuit in each cycle by adjusting the magnitude of the operating voltage threshold or the standby voltage threshold to meet the power demand of the output side, maintaining a high peak current while reducing the switching frequency.

[0119] In one implementation, in response to the output power of the power factor correction circuit 14 being less than a preset output power, at least one of the operating voltage threshold or the standby voltage threshold is increased; or, in response to the output power of the power factor correction circuit 14 being greater than or equal to the preset output power, at least one of the operating voltage threshold or the standby voltage threshold is decreased. Specifically, in response to the output power of the power factor correction circuit 14 being less than the preset output power, at least one of the operating voltage threshold or the standby voltage threshold is increased. In response to the output power of the power factor correction circuit 14 being greater than or equal to the preset output power, at least one of the operating voltage threshold or the standby voltage threshold is decreased.

[0120] Figure 11 This is a schematic diagram of the time-domain waveforms of the input and output of another power module provided in an embodiment of this application. The technical solution of this embodiment can... Figure 9 Implemented in the structure shown in the example or a similar structure. For example... Figure 11 As shown, the rectifier circuit 11 receives AC power V1 and outputs DC power V2, and the power factor correction circuit 14 receives the output V2 of the rectifier circuit 11 and outputs a voltage V. B Among them, the current flowing through inductor L B This is the input current of the power supply module 10.

[0121] As mentioned above Figure 11 As shown, when the absolute value of the instantaneous voltage of AC V1 or the voltage value of DC V2 gradually increases, the absolute value of the instantaneous voltage of AC V1 or the voltage value of DC V2 is compared with the operating voltage threshold. In response to the absolute value of the instantaneous voltage of AC V1 or the voltage value of DC V2 rising to be greater than or equal to the operating voltage threshold, the first controllable switch Q1 in the power factor correction circuit 14 alternately and complementaryly turns on or off, the power factor correction circuit 14 operates in the working state, and the input current I of the power module 10... LB Not zero.

[0122] As the absolute value of the instantaneous voltage of AC V1 or the voltage value of DC V2 gradually decreases from their peak values, the absolute value of the instantaneous voltage of AC V1 or the voltage value of DC V2 is compared with the standby voltage threshold. In response to the absolute value of the instantaneous voltage of AC V1 or the voltage value of DC V2 decreasing from their peak values ​​to less than or equal to the standby voltage threshold, the first controllable switch Q1 in the power factor correction circuit 14 remains off, and the power factor correction circuit 14 operates in standby mode. The input current I of the power module 10... LB It is 0.

[0123] As described above, the instantaneous voltage of AC V1 changes periodically throughout the entire AC cycle. In this embodiment, the operating time T of the rectifier circuit 11 can be controlled. on The length of the [unclear] controls the output power on the output side. Moreover, compared to the above... Figure 10 The operating voltage threshold or standby voltage threshold shown is larger in this embodiment of the application. For example... Figure 11 As shown, within each input cycle of AC power V1, i.e., the time period t1-t6, the working time T in this embodiment of the application is... on Smaller than the above Figure 10 The working time T of the embodiment shown on In the embodiments of this application, the standby time T off Greater than the above Figure 10 The standby time T in the embodiment shown off Therefore, within each input cycle of AC power V1, the output power of the power factor correction circuit 14 is changed by modulating the operating time of the power factor correction circuit 14 within each grid cycle to meet the power demand on the output side.

[0124] It should be noted that the adjustment method and beneficial effects of the power factor correction circuit 14 in this embodiment can also be referred to the above. Figures 2-7 The relevant descriptions in the illustrated embodiments.

[0125] Figure 12 This is a schematic diagram of another power module structure provided in the embodiments of this application. The technical solutions of the embodiments of this application can be used in... Figure 12 Implemented in the structure shown in the example or a similar structure. For example... Figure 12 As shown, the power module 10 includes a rectifier circuit 11 and a series circuit 15.

[0126] Specifically, the two input terminals of the rectifier circuit 11 are used to receive AC power V1, and the two output terminals of the rectifier circuit 11 are used to output DC power V2. Further descriptions of the rectifier circuit 11 can be found in the above descriptions. Figure 9 The embodiments shown are not repeated in this application.

[0127] In one embodiment, the rectifier circuit 11 can also be an active rectifier circuit or a controllable rectifier circuit. This application does not impose specific restrictions on the type of rectifier circuit 11.

[0128] Figure 13 This is a schematic diagram of the circuit topology of another power supply module provided in the embodiments of this application. The technical solutions of the embodiments of this application can be... Figure 12 Implemented in the structure shown in the example or a similar structure. For example... Figure 13As shown, the power module 10 includes a rectifier circuit 11 and a series circuit 15.

[0129] like Figure 13 As shown, the series circuit 15 includes two controllable switches connected in series, namely a controllable switch Q2 and a controllable switch Q3. The source of controllable switch Q2 is connected to the drain of controllable switch Q3, the drain of controllable switch Q2 is connected to one output terminal, and the source of controllable switch Q3 is connected to another output terminal. That is, one output terminal of rectifier circuit 11 is connected to the drain of controllable switch Q2 and outputs DC power, and the other output terminal of rectifier circuit 11 is connected to the source of controllable switch Q3 and grounded. The conduction state of the two controllable switches in the series circuit can be used to control the DC power output of rectifier circuit 11 to power a load, which receives the output of rectifier circuit 11.

[0130] For example, in response to the absolute value of the instantaneous voltage of AC V1 or the voltage value of DC V2 rising to a level greater than or equal to the operating voltage threshold, one controllable switch Q2 and another controllable switch Q3 alternately and complementaryly turn on or off. In response to the absolute value of the instantaneous voltage of AC V1 or the voltage value of DC V2 falling from its peak value to a level less than or equal to the standby voltage threshold, at least one of the controllable switches Q2 and Q3 remains off. When the two controllable switches in the series circuit 15 alternately and complementaryly turn on or off, the DC V2 output by the rectifier circuit 11 can provide normal power to the load. When at least one of the two controllable switches in the series circuit 15 remains off, the DC power output by the rectifier circuit 11 can stop powering the load.

[0131] In one implementation, the power module 10 further includes a control circuit 12. This control circuit 12 is used to control the on / off state of the two controllable switching transistors in the series circuit 15. For example... Figure 13 As shown, in response to the absolute value of the instantaneous voltage of AC V1 or the voltage value of DC V2 rising to a level greater than or equal to the operating voltage threshold, the control circuit outputs two first control signals to control one controllable switch Q2 and the other controllable switch Q3 to alternately and complementaryly turn on or off. For example, the first control signals are alternating high and low level pulse signals. In response to the absolute value of the instantaneous voltage of AC V1 or the voltage value of DC V2 falling from its peak value to a level less than or equal to the standby voltage threshold, the control circuit outputs at least one second control signal to control at least one of the controllable switch Q2 and the other controllable switch Q3 to remain off. For example, the second control signal is a continuous low level signal.

[0132] In one implementation, the series circuit 15 is the bridge arm of the isolated converter circuit, which is used to receive the output of the rectifier circuit, and the series circuit 15 is used to adjust the working state or standby state of the isolated converter circuit.

[0133] For example, the isolated converter circuit can be one of the following: resonant converter LLC, asymmetrical half-bridge flyback converter (AHB), half-bridge forward converter, single-ended flyback converter, and active clamp flyback converter (ACF). This application does not impose specific restrictions on the type of isolated converter circuit.

[0134] Figure 14 This is a schematic diagram of the circuit topology of another power supply module provided in the embodiments of this application. The technical solutions of the embodiments of this application can be... Figure 12 Implemented in the structure shown in the example or a similar structure. For example... Figure 14 As shown, the power supply module 10 includes a rectifier circuit 11 and an isolated converter circuit 13. The isolated converter circuit 13 is an asymmetric half-bridge flyback converter, and the series circuit 15 is the bridge arm of the asymmetric half-bridge flyback converter.

[0135] like Figure 14 As shown, the asymmetric half-bridge flyback converter also includes a transformer T, which comprises a primary winding and a secondary winding. Furthermore, in this embodiment, one controllable switch Q2 and the other controllable switch Q3 in the series circuit 15 can be referred to as the second controllable switch Q2 and the third controllable switch Q3, respectively. The same-name terminal of the primary winding is connected to the source of the second controllable switch Q2 and the drain of the third controllable switch Q3, while the opposite-name terminal of the primary winding is connected to the other output terminal and the source of the third controllable switch Q3. The same-name terminal of the primary winding is in the opposite direction to the same-name terminal of the secondary winding. That is, one output terminal of the rectifier circuit 11 is connected to the drain of the second controllable switch Q2 and outputs DC voltage V2, while the other output terminal of the rectifier circuit 11 is connected to the source of the third controllable switch Q3 and the opposite-name terminal of the primary winding and grounded. The source of the second controllable switch Q2 is connected to the drain of the third controllable switch Q3 and the same-name terminal of the primary winding.

[0136] It should be noted that the second controllable switch Q2 in the series circuit 15 is the main controllable switch of the series circuit 15, and the third controllable switch Q3 is the auxiliary controllable switch of the series circuit. When the absolute value of the instantaneous voltage of AC V1 or the voltage value of DC V2 drops from its peak value to less than or equal to the standby voltage threshold, controlling at least one of the second controllable switch Q2 and the third controllable switch Q3 to remain off can be understood as keeping at least the second controllable switch Q2 off, while the third controllable switch Q3 may remain off or be occasionally turned on.

[0137] In one implementation, the asymmetric half-bridge flyback converter also includes an output capacitor C. B The two ends of the secondary winding are respectively connected to the output capacitor C. B At both ends. For example, in response to a comparison between the output power of the asymmetric half-bridge flyback converter and a preset output power, at least one of the operating voltage threshold or the standby voltage threshold is adjusted.

[0138] Figure 15 This is a schematic diagram of the circuit topology of another power supply module provided in the embodiments of this application. The technical solutions of the embodiments of this application can be... Figure 12 Implemented in the structure shown in the example or a similar structure. For example... Figure 15 As shown, the power module 10 includes a rectifier circuit 11 and an isolated converter circuit 13. The isolated converter circuit 13 is an active clamp flyback converter, and the series circuit 15 is the bridge arm of the active clamp flyback converter.

[0139] like Figure 14 As shown, the series circuit 15 also includes a clamping capacitor C. C The isolated converter circuit 13 is an active clamp flyback converter circuit, and the series circuit 15 is a bridge arm of the active clamp flyback converter circuit. The active clamp flyback converter circuit also includes a transformer T, which includes a primary winding and a secondary winding. The clamping capacitor C... C One end is connected to an output terminal and an opposite terminal of the primary winding, with clamping capacitor C. C The other end is connected to the drain of the second controllable switch Q2, and the corresponding end of the primary winding is connected to the source of the second controllable switch Q2 and the drain of the third controllable switch Q3. That is, one output terminal of the rectifier circuit 11 is connected to the clamping capacitor C. C One end of the primary winding and the opposite end of the primary winding output DC current V2, clamping capacitor C C The other end is connected to the drain of the second controllable switch Q2. The other output terminal of the rectifier circuit 11 is connected to the source of the third controllable switch Q3 and grounded. The source of the second controllable switch Q2 is connected to the drain of the third controllable switch Q3 and the same-name terminal of the primary winding. The same-name terminal of the primary winding is opposite in direction to the same-name terminal of the secondary winding.

[0140] In one implementation, the active clamp flyback converter circuit also includes an output capacitor C. B The two ends of the secondary winding are respectively connected to the output capacitor C. B At both ends. For example, in response to a comparison between the output power of the active clamp flyback converter circuit and a preset output power, at least one of the operating voltage threshold or the standby voltage threshold is adjusted.

[0141] In one implementation, the power module 10 further includes a non-isolated converter circuit for receiving the output of an isolated converter circuit and supplying power to the electronic device 20.

[0142] It should be understood that the above Figure 14 and Figure 15 The provided isolated conversion circuit is only one possible implementation in the embodiments of this application, and the specific circuit structure of the embodiments of this application is not specifically limited.

[0143] It should also be understood that the power module provided in the embodiments of this application is similar to the one described above. Figure 2 -the above Figure 11 The technical solution is similar, and its specific content and beneficial effects can be found in the above-mentioned... Figure 2 -the above Figure 11 The power supply module or control circuit provided will not be described in detail here.

[0144] In one embodiment, this application provides an electronic device that includes the components described above. Figures 2-6 , Figures 8-15 The power module provided in the embodiment, or as such Figure 7 The control circuit provided in the embodiments described above. Its specific details and beneficial effects can be found in the above embodiments, and will not be repeated here.

[0145] In the above embodiments, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions in other embodiments.

[0146] It should be noted that, for the sake of simplicity, the foregoing method embodiments are all described as a series of actions. However, those skilled in the art should understand that this application is not limited to the described order of actions, as some steps may be performed in other orders or simultaneously according to this application. Furthermore, those skilled in the art should also understand that the embodiments described in the specification are preferred embodiments, and the actions and modules involved are not necessarily essential to this application.

[0147] In the several embodiments provided in this application, it should be understood that the disclosed apparatus can be implemented in other ways. For example, the apparatus embodiments described above are merely illustrative; for instance, the division of the units described above is only a logical functional division, and in actual implementation, there may be other division methods. For example, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Furthermore, the coupling or direct coupling or communication connection shown or discussed may be through some interfaces; the indirect coupling or communication connection between devices or units may be electrical or other forms.

[0148] The units described above as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the units can be selected to achieve the purpose of this embodiment according to actual needs.

[0149] Furthermore, the functional units in the various embodiments of this application can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit. The integrated unit can be implemented in hardware or as a software functional unit.

[0150] If the integrated units described above are implemented as software functional units and sold or used as independent products, they can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of this application, in essence, or the part that contributes to the prior art, or all or part of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions to cause a computer device (which can be a personal computer, server, or network device, specifically a processor in the computer device) to execute all or part of the steps of the methods described in the various embodiments of this application. The aforementioned storage medium may include various media capable of storing program code, such as a USB flash drive, portable hard drive, magnetic disk, optical disk, read-only memory (ROM), or random access memory (RAM).

[0151] The above-described embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application.

Claims

1. A power supply module for receiving AC power and outputting DC power, characterized in that, The rectifier includes two input terminals, two output terminals, an inductor, a rectifier circuit, and an output capacitor. The rectifier circuit includes a first bridge arm and a second bridge arm. The first bridge arm includes two controllable switching transistors. The midpoint of the first bridge arm is connected to one of the input terminals via the inductor. The midpoint of the second bridge arm is connected to the other input terminal. The first bridge arm, the second bridge arm, and the output capacitor are connected in parallel between the two output terminals of the rectifier circuit. In response to the absolute value of the instantaneous voltage of the AC power received at the two input terminals rising to a value greater than or equal to the operating voltage threshold, the two controllable switches of the first bridge arm alternately and complementaryly turn on or off. In response to the absolute value of the instantaneous voltage of the AC power received at the two input terminals dropping from its peak value to less than or equal to the standby voltage threshold, at least one of the two controllable switches in the first bridge arm remains off.

2. The power supply module according to claim 1, characterized in that, The second bridge arm includes two controllable switching transistors; In response to an instantaneous voltage of the alternating current being greater than or equal to 0, one of the controllable switches in the second bridge arm remains off, while the other controllable switch in the second bridge arm remains on. In response to the instantaneous voltage of the alternating current being less than 0, one of the controllable switches in the second bridge arm remains on, while the other controllable switch in the second bridge arm remains off.

3. The power supply module according to claim 1, characterized in that, In response to a comparison between the output power of the power module and a preset output power, at least one of the operating voltage threshold or the standby voltage threshold is adjusted.

4. The power supply module according to claim 3, characterized in that, In response to the power output power of the power module being less than the preset output power, at least one of the operating voltage threshold or the standby voltage threshold is increased; or, in response to the power output power of the power module being greater than or equal to the preset output power, at least one of the operating voltage threshold or the standby voltage threshold is decreased.

5. A control circuit for controlling the rectifier circuit of a power supply module, characterized in that, The power module is used to receive AC power and output DC power. The power module includes two input terminals, two output terminals, an inductor, the rectifier circuit, and an output capacitor. The rectifier circuit includes a first bridge arm and a second bridge arm. The first bridge arm includes two controllable switching transistors. The midpoint of the first bridge arm is connected to one of the input terminals via the inductor. The midpoint of the second bridge arm is connected to the other input terminal. The first bridge arm, the second bridge arm, and the output capacitor are connected in parallel between the two output terminals of the rectifier circuit. The control circuit is used for: In response to the absolute value of the instantaneous voltage of the AC power received at the two input terminals rising to a value greater than or equal to the operating voltage threshold, the two controllable switches of the first bridge arm are controlled to alternately and complementaryly turn on or off. In response to the absolute value of the instantaneous voltage of the AC power received at the two input terminals dropping from its peak value to less than or equal to the standby voltage threshold, at least one of the two controllable switches of the first bridge arm is controlled to remain off.

6. The control circuit according to claim 5, characterized in that, The second bridge arm includes two controllable switching transistors, and the control circuit is further used for: In response to the instantaneous voltage of the alternating current being greater than or equal to 0, one of the controllable switches in the second bridge arm is controlled to remain off, and the other controllable switch in the second bridge arm is controlled to remain on. In response to the instantaneous voltage of the alternating current being less than 0, one of the controllable switches in the second bridge arm is controlled to remain on, and the other controllable switch in the second bridge arm is controlled to remain off.

7. The control circuit according to claim 5 or 6, characterized in that, The control circuit is specifically used for: In response to the power output power of the power module being less than a preset output power, at least one of the operating voltage threshold or the standby voltage threshold is increased; or, in response to the power output power of the power module being greater than or equal to the preset output power, at least one of the operating voltage threshold or the standby voltage threshold is decreased.

8. A power supply module, characterized in that, The system includes a rectifier circuit and a power factor correction circuit. The two input terminals of the rectifier circuit are used to receive alternating current (AC), and the two output terminals are used to output direct current (DC). The power factor correction circuit is connected in series between the two output terminals of the rectifier circuit. The power factor correction circuit includes an inductor, a controllable switching transistor, and an output capacitor. The source of the controllable switching transistor is connected to one output terminal via the inductor, and the drain of the controllable switching transistor is connected to the other output terminal. The output capacitor is connected in parallel between the source and drain of the controllable switching transistor. Wherein: In response to the absolute value of the instantaneous voltage of the alternating current or the voltage value of the direct current rising to a value greater than or equal to the operating voltage threshold, the controllable switch is alternately turned on or off. In response to the absolute value of the instantaneous voltage of the alternating current or the voltage value of the direct current dropping from its peak value to less than or equal to the standby voltage threshold, the controllable switch remains off.

9. The power supply module according to claim 8, characterized in that, In response to the output power of the power factor correction circuit being less than a preset output power, at least one of the operating voltage threshold or the standby voltage threshold is increased; or, in response to the output power of the power factor correction circuit being greater than or equal to the preset output power, at least one of the operating voltage threshold or the standby voltage threshold is decreased.

10. A power supply module, characterized in that, The system includes a rectifier circuit and a series circuit. The two input terminals of the rectifier circuit are used to receive alternating current (AC), and the two output terminals are used to output direct current (DC). The series circuit includes two controllable switching transistors. The source of one controllable switching transistor is connected to the drain of the other controllable switching transistor. The drain of one controllable switching transistor is connected to one of the output terminals, and the source of the other controllable switching transistor is connected to the other output terminal. In response to the absolute value of the instantaneous voltage of the alternating current or the voltage value of the direct current rising to a value greater than or equal to the operating voltage threshold, the two controllable switches alternately and complementaryly turn on or off. In response to the absolute value of the instantaneous voltage of the alternating current or the voltage value of the direct current dropping from its peak value to less than or equal to the standby voltage threshold, at least one of the two controllable switching transistors remains off.

11. The power supply module according to claim 10, characterized in that, It also includes an isolated conversion circuit, wherein the series circuit is a bridge arm of the isolated conversion circuit; The isolated converter circuit includes one of the following: a resonant converter circuit, a half-bridge forward converter circuit, an asymmetric half-bridge flyback converter circuit, or an active clamp flyback converter circuit.

12. The power module according to claim 11, characterized in that, The isolated converter circuit is an asymmetric half-bridge flyback converter circuit. The series circuit belongs to the bridge arm of the asymmetric half-bridge flyback converter circuit. The asymmetric half-bridge flyback converter circuit also includes a transformer, which includes a primary winding and a secondary winding. The primary winding's corresponding terminal is connected to the source of one controllable switch and the drain of another controllable switch, while the primary winding's opposite terminal is connected to the output terminal and the source of another controllable switch. The primary winding's corresponding terminal is in the opposite direction to the secondary winding's corresponding terminal.

13. The power supply module according to claim 11, characterized in that, The series circuit also includes a clamping capacitor, the isolated converter circuit is an active clamp flyback converter circuit, the series circuit belongs to the bridge arm of the active clamp flyback converter circuit, and the active clamp flyback converter circuit also includes a transformer, which includes a primary winding and a secondary winding. One end of the clamping capacitor is connected to the output terminal and the opposite terminal of the primary winding, and the other end of the clamping capacitor is connected to the drain of the controllable switch. The same terminal of the primary winding is connected to the source of the controllable switch and the drain of the other controllable switch. The same terminal of the primary winding is in the opposite direction to the same terminal of the secondary winding.

14. An electronic device, characterized in that, It includes a power module as described in any one of claims 1-4, 8-9 or 10-13 above, or a control circuit as described in any one of claims 5-7 above.

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