Switching power supply system, control method, electronic equipment and storage medium

Abstract

The invention discloses a switching power supply system, a control method, electronic equipment and a storage medium, and relates to the technical field of switching voltage, and the switching power supply system comprises a first voltage regulation module, a rectification module, a second voltage regulation module, a feedback control module, a voltage detection module and a mode switching control module. The rectifier module is used for converting input alternating-current voltage into direct-current voltage and outputting the direct-current voltage; the rectification module is connected with the second voltage regulation module through the first voltage regulation module, and the second voltage regulation module is used for boosting or reducing the DC voltage passing through the first voltage regulation module and then outputting the DC voltage to a load; the output end of the feedback control module is connected with the second voltage regulation module, and the input end of the feedback control module is used for being connected with a load; according to the invention, the voltage is boosted or directly transmitted based on the magnitude of the input voltage, so that the range of the voltage finally input to the second voltage regulation module is narrowed, and the efficiency is improved.

Description

Technical Field

[0001] This application relates to the field of switching power supply technology, and in particular to a switching power supply system, control method, electronic device and storage medium. Background Technology

[0002] In existing technologies, switching power supplies are widely used in various scenarios. However, the mains voltage varies in different scenarios. For example, the mains voltage is 220V in some scenarios and 100V in others. Therefore, switching power supplies are generally designed to accept a full voltage input of 90V to 264V, which means that the input of the voltage regulation module in the switching power supply is also in a wide voltage range. However, the efficiency of the voltage regulation module is low in a wide voltage range, which leads to a decrease in the overall efficiency of the switching power supply. Summary of the Invention

[0003] This application aims to address at least one of the technical problems existing in the prior art. To this end, this application proposes a switching power supply system, control method, electronic device, and storage medium capable of boosting or directly transmitting voltage based on the magnitude of the input voltage, thereby narrowing the voltage range ultimately input to the second voltage regulation module connected to the load, and thus improving efficiency.

[0004] The switching power supply system of a first aspect of this application includes: a first voltage regulation module, a rectifier module, a second voltage regulation module, a feedback control module, a voltage detection module, and a mode switching control module. The rectifier module is used to convert an input AC voltage into a DC voltage output. The rectifier module is connected to the second voltage regulation module through the first voltage regulation module. The second voltage regulation module is used to boost or buck the DC voltage obtained from the first voltage regulation module and output it to the load. The output terminal of the feedback control module is connected to the second voltage regulation module, and the input terminal of the feedback control module is connected to the load. The voltage detection module is used to output an electrical signal based on the AC voltage. The voltage detection module is connected to the first voltage regulation module through the mode switching control module. The mode switching control module is used to control the first voltage regulation module to switch its operating mode based on the electrical signal, so as to boost or directly transmit the DC voltage.

[0005] The switching power supply system according to the embodiments of this application has at least the following beneficial effects: By setting a rectifier module, it is convenient to convert the input AC voltage into DC voltage for subsequent device processing. The combination of the voltage detection module, the first voltage regulation module, and the mode switching control module facilitates the following: when the voltage detection module detects a low input voltage, it outputs a corresponding electrical signal, causing the mode switching control module to control the first voltage regulation module to switch to the corresponding operating mode to boost the voltage. When the voltage detection module detects a moderate input voltage, it outputs a corresponding electrical signal, causing the mode switching control module to control the first voltage regulation module to switch to the corresponding operating mode to directly transmit the voltage without boosting it. This results in a narrower voltage range output to the second voltage regulation module, thereby improving the efficiency of the second voltage regulation module and ultimately improving the overall efficiency of the switching power supply system. The second voltage regulation module facilitates further voltage boosting to adapt to the load's input voltage requirements, and the feedback control module facilitates negative feedback regulation of the voltage output from the second voltage regulation module to the load based on the load's feedback signal.

[0006] According to some embodiments of this application, the first voltage regulation module includes a power factor boost unit and a through unit. The rectifier module is connected to the second voltage regulation module through the power factor boost unit. The rectifier module is also connected to the second voltage regulation module through the through unit. The first output terminal of the mode switching control module is connected to the power factor boost unit, and the second output terminal of the mode switching control module is connected to the through unit. The operating modes include boost mode and through mode. The mode switching control module is used to control the first voltage regulation module to boost the DC voltage through the power factor boost unit and then transmit it to the second voltage regulation module when the first voltage regulation module is in boost mode. The mode switching control module is also used to control the first voltage regulation module to directly transmit the DC voltage to the second voltage regulation module through the direct transmission unit when the first voltage regulation module is in the through mode.

[0007] According to some embodiments of this application, a filtering module is also included. The output terminal of the filtering module is connected to the rectifier module, and the input terminal of the filtering module is used to receive the AC voltage. The filtering module is used to filter the AC voltage and then output it to the rectifier module.

[0008] According to some embodiments of this application, the voltage detection module includes a voltage regulator, a first voltage divider resistor, a second voltage divider resistor, a reference voltage comparison unit, and a field-effect transistor. One end of the first voltage divider resistor is used to connect to the AC voltage, and the other end of the first voltage divider resistor is grounded through the second voltage divider resistor. The reference terminal of the reference voltage comparison unit is connected between the first voltage divider resistor and the second voltage divider resistor. The cathode of the reference voltage comparison unit is connected to the cathode of the voltage regulator. The anode of the voltage regulator is connected to the gate of the field-effect transistor. The drain of the field-effect transistor is connected to the mode switching control module.

[0009] According to some embodiments of this application, the voltage detection module further includes a first capacitor and a second capacitor. One end of the first capacitor is connected between the first voltage divider resistor and the second voltage divider resistor, and the other end of the first capacitor is grounded. One end of the second capacitor is connected between the voltage regulator and the field-effect transistor, and the other end of the second capacitor is grounded.

[0010] The control method for a switching power supply according to the second aspect of this application is applied to the switching power supply system according to the first aspect of this application. The method includes: The voltage detection module detects the input AC voltage, generates an electrical signal based on the detected AC voltage, and sends the electrical signal to the mode switching control module. The mode switching control module generates a control signal based on the electrical signal and sends the control signal to the first voltage regulation module. The first voltage regulation module determines the operating mode based on the control signal. The operating mode includes at least a boost mode that boosts the rectified DC voltage and a pass-through mode that directly transmits the rectified DC voltage.

[0011] According to some embodiments of this application, the electrical signal includes a first-level signal and a second-level signal; The step of generating an electrical signal based on the detected AC voltage and sending the electrical signal to the mode switching control module includes: When the AC voltage value is greater than the preset reference voltage, the voltage detection module generates a first level signal and sends the first level signal to the mode switching control module; When the AC voltage is less than the reference voltage, the voltage detection module generates a second level signal and sends the second level signal to the mode switching control module.

[0012] According to some embodiments of this application, the control signal includes a first control signal and a second control signal; The mode switching control module generates a control signal based on the electrical signal and sends the control signal to the first voltage regulation module. The first voltage regulation module determines the operating mode based on the control signal, including: When the electrical signal is the first level signal, the mode switching control module generates a first control signal and sends the first control signal to the first voltage regulation module to control the first voltage regulation module to switch to the direct mode. The direct mode is configured to receive the DC voltage through the direct unit to directly transmit the DC voltage to the second voltage regulation module. When the electrical signal is the second level signal, the mode switching control module generates a second control signal and sends the second control signal to the first voltage regulation module to control the first voltage regulation module to switch to the boost mode. The boost mode is configured to receive the DC voltage through the power factor boost unit, boost the DC voltage and then transmit it to the second voltage regulation module.

[0013] An electronic device according to a third aspect of this application includes a memory and a processor. The memory stores a computer program, and the processor executes the computer program to implement the voltage regulation method of the voltage converter according to a first aspect of this application.

[0014] According to a fourth aspect embodiment of the present application, a computer-readable storage medium stores a computer program that, when executed by a processor, implements the voltage regulation method of the voltage converter described in the first aspect embodiment of the present application.

[0015] Additional aspects and advantages of this application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of this application. Attached Figure Description

[0016] The above and / or additional aspects and advantages of this application will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which: Figure 1 This is a block diagram of a switching power supply system according to an embodiment of this application; Figure 2 This is a circuit schematic diagram of the current detection module according to an embodiment of this application; Figure 3 This is a flowchart illustrating the steps of a switching power supply control method according to an embodiment of this application. Figure 4 This is a schematic diagram of a specific process for step S101; Figure 5This is a schematic diagram of a specific process for step S102; Figure 6 This is a schematic diagram of the structure of an electronic device according to an embodiment of this application; Figure 7 This is a simplified circuit diagram of the second voltage regulation module according to an embodiment of this application. Detailed Implementation

[0017] The embodiments of this application are described in detail below. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this application, and should not be construed as limiting this application.

[0018] In the description of this application, it should be understood that the orientation descriptions, such as up, down, front, back, left, right, etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0019] In the description of this application, "several" means one or more, "more than" means two or more, "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. The use of "first" and "second" in the description is merely for distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features, or implicitly indicating the order of the indicated technical features.

[0020] In the description of this application, unless otherwise expressly defined, terms such as "setup," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this application in conjunction with the specific content of the technical solution.

[0021] Currently, switching power supplies are widely used in various scenarios. However, the mains voltage used in these scenarios may differ. For example, in some scenarios, the mains voltage is 220V, while in others it is 100V. This necessitates that switching power supplies are typically designed to accommodate a wide voltage input range, such as 90V to 264V. However, in switching power supplies, the voltage regulation module, which is directly connected to the load, operates at a lower efficiency when operating under a wide voltage input. This is because adapting to the wide voltage input requirement inevitably imposes significant constraints on the parameter design of related components within the voltage regulation module, resulting in lower-than-expected efficiency for the module and consequently reducing the overall efficiency of the switching power supply.

[0022] Based on this, this application proposes a switching power supply system, control method, electronic device, and storage medium, which aims to boost or directly transmit voltage based on the magnitude of the input voltage, so as to narrow the voltage range of the final input to the second voltage regulation module connected to the load, thereby improving efficiency.

[0023] It is understood that the switching power supply system of the first aspect of this application includes: a first voltage regulation module, a rectifier module, a second voltage regulation module, a feedback control module, a voltage detection module, and a mode switching control module. The rectifier module is used to convert the input AC voltage into a DC voltage output. The rectifier module is connected to the second voltage regulation module through the first voltage regulation module. The second voltage regulation module is used to boost, buck, or stabilize the DC voltage obtained from the first voltage regulation module before outputting it to the load. The output terminal of the feedback control module is connected to the second voltage regulation module, and the input terminal of the feedback control module is used to connect to the load. The voltage detection module is used to output an electrical signal based on the AC voltage. The voltage detection module is connected to the first voltage regulation module through the mode switching control module. The mode switching control module is used to control the first voltage regulation module to switch its operating mode based on the electrical signal, so as to boost or directly transmit the DC voltage.

[0024] The beneficial effects of the switching voltage system in this application embodiment are as follows: By setting a rectifier module, the input AC voltage is easily converted into DC voltage for subsequent device processing. The combination of the voltage detection module, the first voltage regulation module, and the mode switching control module facilitates the following: when the voltage detection module detects a low input voltage, it outputs a corresponding electrical signal, causing the mode switching control module to control the first voltage regulation module to switch to the corresponding operating mode to boost the voltage. When the voltage detection module detects a moderate input voltage, it outputs a corresponding electrical signal, causing the mode switching control module to control the first voltage regulation module to switch to the corresponding operating mode for direct voltage transmission without boosting. This results in a narrower voltage range output to the second voltage regulation module, improving its efficiency and thus the overall efficiency of the switching power supply system. The second voltage regulation module facilitates further voltage boosting to match the load's input voltage requirements, while the feedback control module facilitates negative feedback regulation of the voltage output from the second voltage regulation module to the load based on the load's feedback signal.

[0025] For example, in some embodiments, reference is made to Figure 1In this embodiment, the AC power supply is connected to the input terminal of the rectifier module so that the rectifier module converts the input AC voltage into a stable DC voltage output for use by subsequent modules. For example, if the input AC voltage is 100Vac, the DC voltage output after rectification is 140Vdc; if the input AC voltage is 220Vac, the DC voltage output after rectification is 310Vac. The AC power supply is also connected to the input terminal of the voltage detection module so that the voltage value of the input AC voltage can be detected by the voltage detection module, and the detection result can be output to the mode switching control module in the form of an electrical signal. The mode switching control module can then control the first... The voltage regulation module operates in two modes: direct-through mode and boost mode. A first voltage regulation module is positioned between the rectifier module and the second voltage regulation module. The second voltage regulation module is a flyback converter. Its output is directly connected to the load, while its input is connected to the voltage output from the first voltage regulation module. This allows it to boost or buck the voltage to the required DC voltage for the load. The second voltage regulation module also provides electrical isolation between the first voltage regulation module and the load, ensuring load safety. A feedback control module controls the DC voltage output from the second voltage regulation module to the load based on feedback signals from the load, ensuring stable load operation. The first voltage regulation module supports both boost and direct transmission modes. It can either boost the DC voltage output from the rectifier module based on signals from the mode switching control module before transmitting it to the second voltage regulation module, or output it directly to the second voltage regulation module. For example, when the input AC voltage is 100V, the voltage detection module detects that the input voltage is too low and controls the first voltage regulation module to switch to boost mode through the mode switching control module to boost the 140V DC voltage output by the rectifier module to 310V DC voltage. When the input AC voltage is 220V, the voltage detection module detects that the input voltage is moderate and controls the first voltage regulation module to switch to direct mode through the mode switching control module to directly transmit the 310V DC voltage output by the rectifier module to the second voltage regulation module without boosting it again. This narrows or fixes the input voltage range of the second voltage regulation module, thereby improving the efficiency of the second voltage regulation module and thus improving the overall efficiency of the switching power supply system of this application.

[0026] In some embodiments, reference Figure 7 , Figure 7The following is a simplified diagram of the voltage detection module. In this embodiment, the voltage detection module includes a diode D2, a transformer B1, and a switching transistor S1. The two ends of the primary side of the transformer B1 (i.e., pin 1 and pin 2) are used to connect to the DC voltage output by the pass-through unit or the power factor boost unit. One end of the primary side of the transformer B1 (i.e., pin 2) is connected to the DC voltage through the switching transistor S1. The two ends of the secondary side of the transformer B1 (i.e., pin 3 and pin 4) are used to connect to the load. One end of the secondary side of the transformer B1 (i.e., pin 3) is connected to the load through the diode D2. The Vin terminal of the second voltage regulation module is connected to the output terminals of the direct-through unit and the power factor boost unit, respectively, while the Vo terminal of the voltage regulation module is connected to the load. The second voltage regulation module is used to step down, boost, or regulate the input DC voltage to output a voltage suitable for the load. The input terminal of the feedback control module is connected to the load, and the output terminal is connected to the switching transistor S1 of the second voltage regulation module. When the voltage output from the second voltage regulation module to the load is too high, the load outputs a feedback signal to the feedback control module, which then reduces the duty cycle of the switching transistor S1, i.e., shortens the on-time of the switching transistor S1, thereby reducing the voltage output from the second voltage regulation module to the load. Conversely, when the voltage output from the second voltage regulation module to the load is too low, the load outputs a feedback signal to the feedback control module, which then increases the duty cycle of the switching transistor S1, i.e., extends the on-time of the switching transistor S1, thereby increasing the voltage output from the second voltage regulation module to the load, thus achieving a stable power supply to the load.

[0027] It should be noted that the circuit diagram shown here is only a simplified diagram of the second voltage regulation module. Other components can be added as needed.

[0028] It is understood that: the first voltage regulation module includes a power factor boost unit and a pass-through unit; the rectifier module is connected to the second voltage regulation module through the power factor boost unit; the rectifier module is also connected to the second voltage regulation module through the pass-through unit; the first output terminal of the mode switching control module is connected to the power factor boost unit; the second output terminal of the mode switching control module is connected to the pass-through unit; and the operating modes include boost mode and pass-through mode. The mode switching control module is used to control the first voltage regulation module to boost the DC voltage through the power factor boost unit and then transmit it to the second voltage regulation module when the first voltage regulation module is in boost mode. The mode switching control module is also used to control the first voltage regulation module to directly transmit DC voltage to the second voltage regulation module through the direct transmission unit when the first voltage regulation module is in the direct transmission mode.

[0029] For example, in some embodiments, reference is made to Figure 1In this embodiment, the power factor boosting unit is a PFC power factor boosting module, the model of which can be selected as needed, such as UNOPT3100, etc. The power factor boosting unit is used to boost the DC voltage output by the rectifier module and then transmit it to the second voltage regulation module; while the pass-through unit is equivalent to a direct connection between the rectifier module and the second voltage regulation module, that is, the DC voltage output by the rectifier module is directly output to the second voltage regulation module through the pass-through unit; wherein, when the first voltage regulation module switches to the pass-through mode, the first output terminal and the second output terminal of the mode switching control module send signals to the power factor boosting unit and the pass-through unit respectively. A control signal is sent to activate the pass-through unit, while the power factor boost unit remains inactive. In this state, the DC voltage output from the rectifier module can only be directly transmitted to the second voltage regulation module through the pass-through unit. When the first voltage regulation module switches to boost mode, the first and second output terminals of the mode switching control module send control signals to the power factor boost unit and the pass-through unit, respectively. This causes the pass-through unit to become inactive, while the power factor boost unit becomes active. In this state, the DC voltage output from the rectifier module can only be boosted by the boost unit before being transmitted to the second voltage regulation module. The pass-through unit can be a switching transistor. Upon receiving the first control signal, the transistor closes, turning on the pass-through unit. Upon receiving the fourth control signal, the transistor opens, turning off the pass-through unit. The pass-through unit can be any device that effectively connects the second voltage regulation module and the rectifier module directly in any operating state.

[0030] It is understood that the switching power supply system of this application also includes a filtering module. The output terminal of the filtering module is connected to the rectifier module, the input terminal of the filtering module is used to connect to the AC voltage, and the filtering module is used to filter the AC voltage and output it to the rectifier module.

[0031] For example, in some embodiments, reference is made to Figure 1 In this embodiment, the AC voltage first passes through the filtering module and then is output to the rectifier module to suppress the impact of interference on the system.

[0032] It is understood that the voltage detection module includes a voltage regulator D1, a first voltage divider resistor R5, a second voltage divider resistor R7, a reference voltage comparator unit U1, and a field-effect transistor Q1. One end of the first voltage divider resistor R5 is used to connect to the AC voltage, and the other end of the first voltage divider resistor R5 is grounded through the second voltage divider resistor R7. The reference terminal (pin 2) of the reference voltage comparator unit U1 is connected between the first voltage divider resistor R5 and the second voltage divider resistor R7. The cathode (pin 1) of the reference voltage comparator unit U1 is connected to the cathode of the voltage regulator D1. The anode of the voltage regulator D1 is connected to the gate of the field-effect transistor Q1. The drain of the field-effect transistor Q1 is connected to the mode switching control module.

[0033] For example, in some embodiments, reference is made to Figure 2 In this embodiment, the field-effect transistor Q1 is an NMOS transistor. The cathode of the reference voltage comparator unit U1 is also connected to the auxiliary power supply VCC to drive the reference voltage comparator unit U1 to operate; the anode (pin 3) of the reference voltage comparator unit is grounded. The reference voltage comparator unit U1 is equipped with a reference voltage. When the voltage input to the reference terminal of the reference voltage comparator unit U1 is greater than the reference voltage, the reference voltage comparator unit U1 will start operating, causing conduction between the cathode and anode. When the voltage input to the reference terminal of the reference voltage comparator unit U1 is less than the reference voltage, the reference voltage comparator unit U1 will stop operating, causing cutoff between the cathode and anode. The first voltage divider resistor R5 and the second voltage divider resistor R7 facilitate the comparison of the input AC voltage with the reference voltage of the reference voltage comparator unit U1 after voltage division. The voltage regulator D1 is used to prevent excessive voltage input to the gate of the field-effect transistor Q1, which could damage Q1. Its working principle is as follows: For example, assuming the reference voltage of the reference voltage comparator unit U1 is 2.5V and the input AC voltage is 100V, after being divided by the first voltage divider resistor R5 and the second voltage divider resistor R7, the voltage input to the reference voltage comparator unit U1 is 2.1V. Since 2.1V is less than 2.5V, the reference voltage comparator unit U1 does not work, causing the cathode and anode of the reference voltage comparator unit U1 to be cut off. The voltage at the gate of the field-effect transistor Q1 is equivalent to the voltage input of the auxiliary power supply VCC, causing the field-effect transistor Q1 to conduct, making the electrical signal output from the drain of the field-effect transistor Q1 low level; if the input... The AC voltage is 220V. After being divided by the first voltage divider resistor R5 and the second voltage divider resistor R7, the voltage input to the reference voltage comparison unit U1 is 2.8V. Since 2.8V is greater than 2.5V, the reference voltage comparison unit U1 is activated, causing the cathode and anode of the reference voltage comparison unit U1 to conduct. The voltage at the gate of the field-effect transistor Q1 is pulled down to ground, causing the field-effect transistor Q1 to be cut off. This causes the electrical signal output from the drain of the field-effect transistor Q1 to be pulled up to a high level by the mode switching control module. Thus, the mode switching control module can control the switching of the mode of the first voltage regulation module based on the electrical signal output by the voltage detection module.

[0034] It is understood that the voltage detection module also includes a first capacitor C2 and a second capacitor C1. One end of the first capacitor C2 is connected between the first voltage divider resistor R5 and the second voltage divider resistor R7, and the other end of the first capacitor C2 is grounded. One end of the second capacitor C1 is connected between the voltage regulator D1 and the field-effect transistor Q1, and the other end of the second capacitor C1 is grounded.

[0035] For example, in some embodiments, reference is made to Figure 2In this embodiment, the arrangement of the first capacitor C2 and the second capacitor C1 facilitates high-frequency filtering and prevents high-frequency interference signals from affecting the reference voltage comparison unit U1 and the field-effect transistor Q1.

[0036] The following describes the effect of the switching voltage system of this application through a specific scenario: There are two mains voltages: 100Vac and 220Vac. When these two AC voltages are input to a traditional switching voltage system, after filtering and rectification, the DC voltages input to the second voltage regulation module are 140Vdc and 310Vdc, respectively, resulting in a wide input voltage range for the second voltage regulation module. However, in the switching power supply system of this application, when the input mains voltage is 100Vac, the current detection module detects that the input AC voltage, after being divided, is lower than the reference voltage. Therefore, it outputs a low level to the mode switching control module, causing the mode switching control module to issue corresponding control signals. For example, the second output terminal of the mode switching control module sends a fourth control signal to the pass-through unit, and the first output terminal sends a second control signal to the power factor boost unit, causing the power factor boost unit to operate while the pass-through unit remains inactive. This causes the power factor boost unit to boost the 140Vdc output from the rectifier module to 310Vdc. The Vdc voltage is then output to the second voltage regulation module. When the input mains voltage is 220Vac, the current detection module detects that the input AC voltage, after being divided, is higher than the reference voltage. It then outputs a high level to the mode switching control module, causing the mode switching control module to issue corresponding control signals. For example, the second output of the mode switching control module sends a first control signal to the pass-through unit, and the first output of the mode switching control module sends a third control signal to the power factor boost unit. This causes the power factor boost unit to be inactive, while the pass-through unit is active. This causes the pass-through unit to directly transmit the 310Vdc output from the rectifier module to the second voltage regulation module without boosting it. This ensures that the voltage ultimately input to the second voltage regulation module is stable at 310Vac, or remains within a narrow voltage range. This results in a narrower input voltage range for the second voltage regulation module in this application's switching power supply system compared to traditional switching power supply systems.Based on existing technology, we know that when the power required by the load remains constant, voltage and current are inversely proportional. Therefore, a high voltage input to the second voltage regulation module corresponds to a small current, while a low voltage input corresponds to a large current. For example, 140Vac corresponds to a current of 0.71A, while 310Vac corresponds to a current of 0.32A. The efficiency of the second voltage regulation module is the ratio of output power to input power. Its efficiency is mainly affected by power loss during transmission. The power output to the load is typically kept stable and does not fluctuate with changes in the mains voltage input. The voltage regulation module's resistance must be adjusted accordingly; otherwise, it may cause irreversible damage to the load. Conduction loss constitutes a large portion of power loss. Conduction loss is calculated as the square of the circuit current multiplied by the on-resistance. Under different input voltage conditions, the on-resistance of the second voltage regulation module remains constant. Therefore, the change in conduction loss is mainly caused by the circuit current. The square of 0.32A is approximately 0.1, and the square of 0.71 is approximately 0.5. This means that the power loss generated by the second voltage regulation module with an input voltage of 140V is 5 times that with an input voltage of 310V. Therefore, stabilizing the input voltage of the second voltage regulation module at 31V is crucial. Fluctuating at 0V or within a narrow range around this value results in higher efficiency than traditional switching power supply systems. This is also why a power factor boost unit is designed instead of a buck unit; stabilizing the voltage input to the second voltage regulation module at a higher value also improves its efficiency. Furthermore, due to reduced power loss, the heat generated by the second voltage regulation module is significantly reduced, leading to a lower overall temperature of the switching power supply system. This eliminates the need for a separate cooling system, reducing costs and the risk of burns to users, thus improving the user experience. Lowering the temperature can also extend the lifespan of the device, thereby reducing maintenance costs. Meanwhile, in the design of the second voltage regulation module, a transformer is included. As a magnetic material device, the transformer needs to ensure that the magnet density is greater than 0.3, otherwise the transformer will saturate and cannot work. The magnet density is directly proportional to the input current and inversely proportional to the number of turns of the transformer. The number of turns will affect the total length of the winding wire, thereby indirectly affecting the conduction resistance. That is, the fewer the number of turns, the shorter the required winding wire length and the lower the conduction resistance. Conversely, the more the number of turns, the longer the required winding wire length and the greater the conduction resistance.Traditional solutions suffer from varying input currents due to the input voltage to the second voltage regulation module being either 140V or 310V. To accommodate these variations, the transformer must be configured with the minimum number of turns to prevent it from becoming unsaturated and ineffective when the input current is minimal. However, the transformer turns configuration in this application is specifically designed for 310V inputs or narrow voltage ranges, where current fluctuations are minimal. This reduces the range the transformer needs to accommodate, resulting in fewer turns required than in traditional solutions. Consequently, the on-resistance of this solution is lower than that of traditional solutions, leading to reduced efficiency losses and further improving the efficiency of the switching power supply system in this application. Meanwhile, since the power factor boost unit needs to boost the voltage, even when it is not in operation, the losses of the power factor boost unit are still significant. This application addresses this by incorporating a voltage detection module to monitor the input AC voltage in real time. When a boost is needed, the mode switching control module switches the power factor boost unit to the operating state. When a boost is not needed, the power factor boost unit is switched back to the inactive state. When the power factor boost unit is in the inactive state, it does not operate or have any effect, thus generating no losses. This means that although this application has an additional power factor boost unit compared to traditional switching power supply systems, the resulting losses are not significantly increased, while effectively improving the efficiency of the second voltage regulation module.

[0037] The second aspect of this application also provides a control method for a switching power supply, applied to the switching power supply system of the first aspect of this application. Referring to the figures... Figure 3 This is a flowchart illustrating the steps of a switching power supply control method according to an embodiment of this application. Figure 3 The illustrated process steps include, but are not limited to, steps S101 to S102.

[0038] In step S101, the voltage detection module detects the input AC voltage, generates an electrical signal based on the detected AC voltage, and sends the electrical signal to the mode switching control module.

[0039] In step S102, the mode switching control module generates a control signal based on the electrical signal and sends the control signal to the first voltage regulation module. The first voltage regulation module determines the working mode based on the control signal. The working mode includes at least a boost mode that boosts the rectified DC voltage and a pass-through mode that directly transmits the rectified DC voltage.

[0040] In some embodiments, the electrical signal includes a first-level signal and a second-level signal, as shown in the reference. Figure 4 Step S101 may include, but is not limited to, steps S201 to S202.

[0041] Step S201: When the AC voltage value is greater than the preset reference voltage, the voltage detection module generates a first level signal and sends the first level signal to the mode switching control module.

[0042] In step S202, when the AC voltage value is less than the reference voltage, the voltage detection module generates a second level signal and sends the second level signal to the mode switching control module.

[0043] In step S201 of some embodiments, the input terminal of the voltage detection module is connected to the grid voltage. When the AC voltage output by the grid voltage is detected by the voltage detection module to be greater than the reference voltage, the voltage detection module will generate a first level signal, i.e., a high level, to be output to the mode switching control module.

[0044] In step S202 of some embodiments, when the AC voltage output from the mains voltage is detected by the voltage detection module as being less than the reference voltage, the voltage detection module generates a second level signal, i.e., a low level, to be output to the mode switching control module.

[0045] In steps S201 to S202 of this embodiment, the input AC voltage is detected by the voltage detection module to determine whether the AC voltage is greater than the reference voltage, thereby outputting a corresponding electrical signal to the mode switching control module to cause it to switch the working mode of the first voltage regulation module accordingly.

[0046] In some embodiments, the control signal includes a first control signal, a second control signal, a third control signal, and a fourth control signal, as shown in the reference. Figure 5 Step S102 may include, but is not limited to, steps S301 to S302.

[0047] In step S301, when the electrical signal is a first level signal, the mode switching control module generates a first control signal and sends the first control signal to the first voltage regulation module to control the first voltage regulation module to switch to the direct mode. The direct mode is configured to receive DC voltage through the direct unit to directly transmit the DC voltage to the second voltage regulation module.

[0048] In step S302, when the electrical signal is a second level signal, the mode switching control module generates a second control signal and sends the second control signal to the first voltage regulation module to control the first voltage regulation module to switch to boost mode. The boost mode is configured to receive DC voltage through the power factor boost unit, boost the DC voltage and then transmit it to the second voltage regulation module.

[0049] In step S301 of some embodiments, when the electrical signal is a first level signal, the mode switching control module generates a first control signal and a third control signal. The first control signal is output to the pass-through unit, making the pass-through unit work. The third control signal is output to the power factor boost unit, making the power factor boost unit not work. This results in the DC voltage output by the rectifier module being directly transmitted to the second voltage regulation module only through the pass-through unit.

[0050] In step S302 of some embodiments, when the electrical signal is a second level signal, the mode switching control module generates a second control signal and a fourth control signal. The fourth control signal is output to the pass-through unit, making the pass-through unit in a non-operating state. The second control signal is output to the power factor boost unit, making the power factor boost unit in an operating state. This results in the DC voltage output by the rectifier module being boosted only through the power factor boost unit before being output to the second voltage regulation module.

[0051] In steps S301 to S302 of this embodiment, the operating mode of the first voltage regulation module is switched by the mode switching control module, so that only one of the through unit and the power factor boost unit is in working state, thereby reducing power consumption. At the same time, it also makes the voltage range finally input to the second voltage regulation module narrower, thus improving the efficiency of the second voltage regulation module.

[0052] An embodiment of the third aspect of this application also provides an electronic device, which includes a memory 602 and a processor 601. The memory 602 stores a computer program, and the processor 601 executes the computer program to implement the voltage regulation method of the voltage converter of the first aspect embodiment described above. This electronic device can be any smart terminal, including tablet computers, in-vehicle computers, etc.

[0053] Reference Figure 6 , Figure 6 This is a schematic diagram of the structure of an electronic device according to one embodiment. The electronic device includes: The processor 601 can be implemented using a general-purpose CPU (Central Processing Unit), microprocessor, application-specific integrated circuit (ASIC), or one or more integrated circuits, and is used to execute relevant programs to implement the technical solutions provided in the embodiments of this application. The memory 602 can be implemented as a read-only memory, static storage device, dynamic storage device, or random access memory (RAM). The memory 602 can store the operating system and other applications. When the technical solutions provided in the embodiments of this specification are implemented through software or firmware, the relevant program code is stored in the memory 602 and is called and executed by the processor 601 using the television bezel laser etching method of the embodiments of this application. The input / output interface 603 is used to implement information input and output; The communication interface 604 is used to enable communication and interaction between this device and other devices. Communication can be achieved via wired or wireless means. Bus 605 transmits information between the various components of the device; The processor 601, memory 602, input / output interface 603, and communication interface 604 are connected to each other within the device via bus 605.

[0054] A fourth aspect of this application also provides a computer-readable storage medium storing a computer program that, when executed by a processor, implements the voltage regulation method of the voltage converter described in the first aspect of the embodiment.

[0055] Memory, as a non-transitory computer-readable storage medium, can be used to store non-transitory software programs and non-transitory computer-executable programs. Furthermore, memory may include high-speed random access memory, and may also include non-transitory memory, such as at least one disk storage device, flash memory device, or other non-transitory solid-state storage device. In some embodiments, memory may optionally include memory remotely located relative to the processor, and these remote memories can be connected to the processor via a network. Examples of such networks include, but are not limited to, the Internet, intranets, local area networks, mobile communication networks, and combinations thereof.

[0056] The embodiments described in this application are for the purpose of more clearly illustrating the technical solutions of the embodiments of this application, and do not constitute a limitation on the technical solutions provided by the embodiments of this application. As those skilled in the art will know, with the evolution of technology and the emergence of new application scenarios, the technical solutions provided by the embodiments of this application are also applicable to similar technical problems.

[0057] Those skilled in the art will understand that the technical solutions shown in the figures do not constitute a limitation on the embodiments of this application, and may include more or fewer steps than shown, or combine certain steps, or different steps.

[0058] The device embodiments described above are merely illustrative. The units described as separate components may or may not be physically separate; that is, they may be located in one place or distributed across multiple network units. Some or all of the modules can be selected to achieve the purpose of this embodiment according to actual needs.

[0059] Those skilled in the art will understand that all or some of the steps in the methods disclosed above, as well as the functional modules / units in the systems and devices, can be implemented as software, firmware, hardware, or suitable combinations thereof.

[0060] The terms “first,” “second,” “third,” “fourth,” etc. (if present) in the specification and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of this application described herein can be implemented in orders other than those illustrated or described herein. 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 comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0061] 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 represent 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.

[0062] In the several embodiments provided in this application, it should be understood that the disclosed apparatus and methods 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 apparatuses or units may be electrical, mechanical, or other forms.

[0063] 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.

[0064] 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.

[0065] If the integrated unit is implemented as a software functional unit and sold or used as an independent product, it 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 multiple instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute all or part of the steps of the methods of the various embodiments of this application. The aforementioned storage medium includes various media capable of storing programs, such as USB flash drives, portable hard drives, read-only memory (ROM), random access memory (RAM), magnetic disks, or optical disks.

[0066] The preferred embodiments of the present application have been described above with reference to the accompanying drawings, but this does not limit the scope of the claims of the present application. Any modifications, equivalent substitutions, and improvements made by those skilled in the art without departing from the scope and substance of the embodiments of the present application shall be within the scope of the claims of the present application.

Claims

1. A switching power supply system, characterized in that, include: First voltage regulation module; A rectifier module, which converts the input AC voltage into a DC voltage output; The second voltage regulation module is connected to the rectifier module through the first voltage regulation module. The second voltage regulation module is used to boost or buck the DC voltage passed through the first voltage regulation module and output it to the load. A feedback control module, wherein the output terminal of the feedback control module is connected to the second voltage regulation module, and the input terminal of the feedback control module is used to connect to the load; A voltage detection module, which outputs an electrical signal based on the AC voltage; A mode switching control module is provided, and the voltage detection module is connected to the first voltage regulation module through the mode switching control module. The mode switching control module is used to control the first voltage regulation module to switch its working mode based on the electrical signal, so as to boost the DC voltage or transmit it directly.

2. The switching power supply system according to claim 1, characterized in that, The first voltage regulation module includes a power factor boost unit and a pass-through unit. The rectifier module is connected to the second voltage regulation module through the power factor boost unit. The rectifier module is also connected to the second voltage regulation module through the pass-through unit. The first output terminal of the mode switching control module is connected to the power factor boost unit, and the second output terminal of the mode switching control module is connected to the pass-through unit. The operating modes include boost mode and pass-through mode. The mode switching control module is used to control the first voltage regulation module to boost the DC voltage through the power factor boost unit and then transmit it to the second voltage regulation module when the first voltage regulation module is in boost mode. The mode switching control module is also used to control the first voltage regulation module to directly transmit the DC voltage to the second voltage regulation module through the direct transmission unit when the first voltage regulation module is in the through mode.

3. The switching power supply system according to claim 1, characterized in that, It also includes a filtering module, the output of which is connected to the rectifier module, and the input of which is used to receive the AC voltage. The filtering module is used to filter the AC voltage and then output it to the rectifier module.

4. The switching power supply system according to claim 1, characterized in that, The voltage detection module includes a voltage regulator, a first voltage divider resistor, a second voltage divider resistor, a reference voltage comparator unit, and a field-effect transistor (FET). One end of the first voltage divider resistor is connected to the AC voltage, and the other end of the first voltage divider resistor is grounded through the second voltage divider resistor. The reference terminal of the reference voltage comparator unit is connected between the first voltage divider resistor and the second voltage divider resistor. The cathode of the reference voltage comparator unit is connected to the cathode of the voltage regulator. The anode of the voltage regulator is connected to the gate of the FET. The drain of the FET is connected to the mode switching control module.

5. The switching power supply circuit according to claim 4, characterized in that, The voltage detection module further includes a first capacitor and a second capacitor. One end of the first capacitor is connected between the first voltage divider resistor and the second voltage divider resistor, and the other end of the first capacitor is grounded. One end of the second capacitor is connected between the voltage regulator and the field-effect transistor, and the other end of the second capacitor is grounded.

6. A control method for a switching power supply, characterized in that, The control method for the switching power supply is applied to the switching power supply system according to any one of claims 1 to 5; The method includes: The voltage detection module detects the input AC voltage, generates an electrical signal based on the detected AC voltage, and sends the electrical signal to the mode switching control module. The mode switching control module generates a control signal based on the electrical signal and sends the control signal to the first voltage regulation module. The first voltage regulation module determines the operating mode based on the control signal. The operating mode includes at least a boost mode that boosts the rectified DC voltage and a pass-through mode that directly transmits the rectified DC voltage.

7. The control method for a switching power supply according to claim 6, characterized in that, The electrical signal includes a first-level signal and a second-level signal; The step of generating an electrical signal based on the detected AC voltage and sending the electrical signal to the mode switching control module includes: When the AC voltage value is greater than the preset reference voltage, the voltage detection module generates a first level signal and sends the first level signal to the mode switching control module; When the AC voltage is less than the reference voltage, the voltage detection module generates a second level signal and sends the second level signal to the mode switching control module.

8. The control method for a switching power supply according to claim 7, characterized in that, The control signal includes a first control signal and a second control signal; The mode switching control module generates a control signal based on the electrical signal and sends the control signal to the first voltage regulation module. The first voltage regulation module determines the operating mode based on the control signal, including: When the electrical signal is the first level signal, the mode switching control module generates a first control signal and sends the first control signal to the first voltage regulation module to control the first voltage regulation module to switch to the direct mode. The direct mode is configured to receive the DC voltage through the direct unit to directly transmit the DC voltage to the second voltage regulation module. When the electrical signal is the second level signal, the mode switching control module generates a second control signal and sends the second control signal to the first voltage regulation module to control the first voltage regulation module to switch to the boost mode. The boost mode is configured to receive the DC voltage through the power factor boost unit, boost the DC voltage and then transmit it to the second voltage regulation module.

9. An electronic device, characterized in that, The electronic device includes a memory and a processor, the memory storing a computer program, and the processor executing the computer program to implement the control method of the switching power supply according to any one of claims 6 to 8.

10. A computer-readable storage medium storing a computer program, characterized in that, When the computer program is executed by the processor, it implements the control method of the switching power supply as described in any one of claims 6 to 8.

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