Power supply circuit and power supply equipment

Abstract

The utility model discloses a power supply circuit and power supply equipment. The power supply circuit comprises a first voltage conversion module, a first switch module, a second voltage conversion module, a second switch module and a control module. The first end of the first switch module is coupled to the output end of the first voltage conversion module, and the second end of the first switch module is coupled to the first output end of the power supply circuit; the first end of the second switch module is coupled with the output end of the first voltage conversion module, and the second end of the second switch module is coupled with the output end of the second voltage conversion module; the control module is respectively coupled with the first voltage conversion module, the first switch module, the second voltage conversion module and the second switch module; when the control module responds to the first output end and is coupled with the first load, the control module controls the first switch module and the second switch module to be switched on, so that the first voltage conversion module and the second voltage conversion module jointly supply power to the first load. In this way, the hardware cost of the power supply circuit is effectively reduced.

Description

Technical Field

[0001] The present application relates to the field of power supply technology, and in particular to a power supply circuit and a power supply device. Background Art

[0002] The power supply equipment can convert AC power into DC power, thereby supplying power to the corresponding load, or the power supply equipment can convert DC power into DC power, thereby supplying power to the corresponding load.

[0003] Current multi-output power supply equipment controls each output port individually, resulting in large transformers and main power devices used in each power supply circuit, which results in relatively high costs. In addition, if each output port needs to be fully loaded, the devices need to be designed for full load. The more output ports there are, the higher the cost. Utility Model Content

[0004] The power supply circuit and power supply equipment provided in this application effectively reduce the hardware cost of the power supply circuit.

[0005] In order to solve the above technical problems, the present application provides a power supply circuit on the one hand, which includes: a first voltage conversion module; a first switch module, the first end of the first switch module is coupled to the output end of the first voltage conversion module, and the second end of the first switch module is coupled to the first output end of the power supply circuit; a second voltage conversion module; a second switch module, the first end of the second switch module is coupled to the output end of the first voltage conversion module, and the second end of the second switch module is coupled to the output end of the second voltage conversion module; a control module, which is respectively coupled to the first voltage conversion module, the first switch module, the second voltage conversion module, and the second switch module; wherein, in response to the first output end being coupled to the first load, the control module controls the first switch module and the second switch module to be turned on, so that the first voltage conversion module and the second voltage conversion module jointly supply power to the first load.

[0006] The power supply circuit further includes: a third voltage conversion module; a third switch module, wherein the first end of the third switch module is coupled to the output end of the third voltage conversion module, and the second end of the third switch module is coupled to the output end of the first voltage conversion module; wherein the control module controls the first switch module, the second switch module and the third switch module to be turned on in response to the first output end being coupled to the first load, so that the first voltage conversion module, the second voltage conversion module and the third voltage conversion module jointly supply power to the first load.

[0007] After the first output terminal is coupled to the first load, the control module controls the second switch module to be cut off in response to the second output terminal of the power supply circuit being coupled to the second load, so that the second voltage conversion module supplies power to the second load, and the first voltage conversion module and the third voltage conversion module jointly supply power to the first load.

[0008] After the first output terminal is coupled to the first load and the second output terminal is coupled to the second load, the control module controls the third switch module to be cut off in response to the third output terminal of the power supply circuit being coupled to the third load, so that the third voltage conversion module supplies power to the third load.

[0009] In which, the power supply circuit also includes: a fourth switch module, a first end of the fourth switch module is coupled to the output end of the second voltage conversion module, and a second end of the fourth switch module is coupled to the second output end of the power supply circuit; a fifth switch module, a first end of the fifth switch module is coupled to the output end of the third voltage conversion module, and a second end of the fifth switch module is coupled to the third output end of the power supply circuit; the first switch module includes a first transistor, a first end of the first transistor is coupled to the output end of the first voltage conversion module, a second end of the first transistor is coupled to the first output end of the power supply circuit, and a control end of the first transistor is coupled to the control module; the fourth switch module includes a second transistor, a first end of the second transistor is coupled to the output end of the second voltage conversion module, a second end of the second transistor is coupled to the second output end of the power supply circuit, and a control end of the second transistor is coupled to the control module. Coupling control module; the second switch module includes a third transistor and a fourth transistor, the first end of the third transistor is coupled to the output end of the first voltage conversion module, the second end of the third transistor is coupled to the first end of the fourth transistor, the second end of the fourth transistor is coupled to the output end of the second voltage conversion module, and the control ends of the third transistor and the fourth transistor are coupled to the control module; the fifth switch module includes a fifth transistor, the first end of the fifth transistor is coupled to the output end of the third voltage conversion module, and the second end of the fifth transistor is coupled to the third output end of the power supply circuit; the fourth switch module includes a sixth transistor and a seventh transistor, the first end of the sixth transistor is coupled to the output end of the first voltage conversion module, the second end of the sixth transistor is coupled to the first end of the seventh transistor, and the second end of the seventh transistor is coupled to the output end of the third voltage conversion module.

[0010] In which, a first body diode is provided in the fourth transistor, the anode of the first body diode is coupled to the second end of the fourth transistor, and the cathode of the first body diode is coupled to the first end of the fourth transistor; a second body diode is provided in the seventh transistor, the anode of the second body diode is coupled to the second end of the seventh transistor, and the cathode of the first body diode is coupled to the first end of the seventh transistor; in which, the control module controls the first transistor, the third transistor and the sixth transistor to be turned on in response to the first output end being coupled to the first load, so that the first voltage conversion module, the second voltage conversion module and the third voltage conversion module jointly supply power to the first load.

[0011] After the first output terminal is coupled to the first load, the control module controls the third transistor to be turned off and the second transistor to be turned on in response to the second output terminal being coupled to the second load, so that the second voltage conversion module supplies power to the second load, and the first voltage conversion module and the third voltage conversion module jointly supply power to the first load.

[0012] The power supply circuit further includes: a sixth switch module, a first end of the sixth switch module is coupled to the output end of the second voltage conversion module, and a second end of the sixth switch module is coupled to the output end of the third voltage conversion module.

[0013] Among them, the sixth switch module includes an eighth transistor and a ninth transistor; the first end of the eighth transistor is coupled to the output end of the second voltage conversion module, the second end of the eighth transistor is coupled to the first end of the ninth transistor, and the second end of the ninth transistor is coupled to the output end of the third voltage conversion module.

[0014] In order to solve the above technical problems, the present application provides a power supply device on the other hand, which includes a power supply circuit provided by the above technical solution.

[0015] The power supply circuit and power supply equipment provided in this application adopt a multi-channel voltage conversion module parallel connection scheme to achieve multi-channel parallel operation, thereby utilizing the multi-channel voltage conversion module to achieve a single-channel full load function, which can effectively reduce the design requirements for the device and save the hardware cost of the power supply circuit and power supply equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0017] Figure 1 This is a schematic structural diagram of an embodiment of a power supply circuit provided by the present application;

[0018] Figure 2 is a structural diagram of another embodiment of the power supply circuit provided by the present application;

[0019] Figure 3 is a structural diagram of another embodiment of the power supply circuit provided by the present application;

[0020] Figure 4 is a structural diagram of another embodiment of the power supply circuit provided by the present application;

[0021] Figure 5 is a structural diagram of another embodiment of the power supply circuit provided by the present application;

[0022] Figure 6 is a structural diagram of another embodiment of the power supply circuit provided by the present application;

[0023] Figure 7 is a structural diagram of another embodiment of the power supply circuit provided by the present application;

[0024] Figure 8 is a structural diagram of another embodiment of the power supply circuit provided by the present application;

[0025] Figure 9 It is a structural diagram of an embodiment of the power supply equipment provided in this application. DETAILED DESCRIPTION

[0026] The present application will be further described in detail below in conjunction with the accompanying drawings and examples. It is particularly noted that the following examples are only intended to illustrate the present application and are not intended to limit the scope of the present application. Similarly, the following examples are only some examples of the present application and not all examples. All other examples obtained by those of ordinary skill in the art without creative work are intended to fall within the scope of protection of this application.

[0027] In the description of this application, the meaning of "multiple" is at least two, such as two, three, etc., unless otherwise specifically defined. The terms "first", "second", and "third" in the embodiments of this application are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, a feature defined as "first", "second", and "third" may explicitly or implicitly include at least one of such features. All directional indications in the embodiments of this application (such as up, down, left, right, front, back, etc.) are only used to explain the relative positional relationship, movement, etc. between the components under a specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly. The terms "including" and "having" in the embodiments of this application and any variations thereof are intended to cover non-exclusive inclusions. For example, a process, method, system, product, or device that includes a series of steps or units is not limited to the listed steps or units, but may optionally include steps or units that are not listed, or may optionally include other steps or components inherent to these processes, methods, products, or devices.

[0028] References to "embodiments" herein mean that a particular feature, structure, or characteristic described in connection with the embodiments may be included in at least one embodiment of the present application. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor does it constitute an independent or alternative embodiment that is mutually exclusive of other embodiments. It is understood, both explicitly and implicitly, by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0029] The power supply equipment can convert AC power into DC power, thereby supplying power to the corresponding load, or the power supply equipment can convert DC power into DC power, thereby supplying power to the corresponding load.

[0030] Current multi-output power supply equipment controls each output port individually, resulting in large transformers and main power devices used in each power supply circuit, which results in relatively high costs. In addition, if each output port needs to be fully loaded, the devices need to be designed for full load. The more output ports there are, the higher the cost.

[0031] Based on this, this application proposes a solution that uses multiple voltage conversion modules in parallel to achieve multi-channel parallel operation. This solution utilizes multiple voltage conversion modules to achieve full load on a single channel, effectively reducing component design requirements and saving hardware costs for power supply circuits and equipment. For details, refer to any of the following embodiments.

[0032] See Figure 1 , Figure 1 FIG1 is a schematic diagram of a power supply circuit according to an embodiment of the present invention. The power supply circuit 100 includes a first voltage conversion module 10, a first switch module K10, a second voltage conversion module 20, a fourth switch module K20, a second switch module K30, and a control module (not shown).

[0033] In some embodiments, the first voltage conversion module 10 may be an AC-DC module configured to receive alternating current and output direct current.

[0034] In some embodiments, the first voltage conversion module 10 may be a DC-DC module configured to receive direct current (DC) power and output DC power.

[0035] A first end of the first switch module K10 is coupled to the output end of the first voltage conversion module 10 , and a second end of the first switch module K10 is coupled to the first output end A of the power supply circuit 100 .

[0036] In some embodiments, the second voltage conversion module 20 may be an AC-DC module configured to receive alternating current and output direct current.

[0037] In some embodiments, the second voltage conversion module 20 may be a DC-DC module configured to receive direct current and output direct current.

[0038] A first end of the fourth switch module K20 is coupled to the output end of the second voltage conversion module 20 , and a second end of the fourth switch module K20 is coupled to the second output end B of the power supply circuit 100 .

[0039] A first end of the second switch module K30 is coupled to the output end of the first voltage conversion module 10 , and a second end of the second switch module K30 is coupled to the output end of the second voltage conversion module 20 .

[0040] The control module is respectively coupled to the first voltage conversion module 10 , the first switch module K10 , the second voltage conversion module 20 , the fourth switch module K20 and the second switch module K30 .

[0041] In some embodiments, the first switch module K10 , the fourth switch module K20 , and the second switch module K30 may be composed of elements with switching performance, such as relays and / or transistors.

[0042] In some embodiments, the output terminal of the power supply circuit 100 is provided with a corresponding protocol chip, which is coupled to the control circuit. When the protocol chip detects that the output terminal is coupled to a load, it interacts with the load and sets a corresponding set voltage. The set voltage is used to instruct the voltage conversion module corresponding to the protocol chip to output a corresponding output voltage. The protocol chip can interact with the load and provide feedback to the load on the power output capability of the output terminal.

[0043] The power supply circuit 100 of this embodiment has the following power supply modes:

[0044] The first type: Only the first output terminal A is coupled to the load. For example, in response to the first output terminal A being coupled to the first load, the control module controls the first switch module K10 and the second switch module K30 to conduct, so that the first voltage conversion module 10 and the second voltage conversion module 20 jointly supply power to the first load. At this time, the fourth switch module K20 remains off. During this process, the voltage output by the first voltage conversion module 10 needs to be higher than the voltage output by the second voltage conversion module 20 to avoid a shutdown during full load dynamics. That is, when parallel power supply is required, the output voltage of the voltage conversion module corresponding to the path to be parallel powered needs to be higher than the output voltages of the remaining voltage conversion modules.

[0045] The second method involves coupling the first output terminal A to the load first, followed by coupling the second output terminal B to the load. For example, after the first output terminal A is coupled to the first load, the control module, in response to the second output terminal B being coupled to the second load, controls the fourth switch module K20 to turn on and the second switch module K30 to turn off, so that the first voltage conversion module 10 supplies power to the first load and the second voltage conversion module 20 supplies power to the second load. At this point, the first switch module K10 remains on.

[0046] The third method: Only the second output terminal B is coupled to the load. For example, in response to the second output terminal B being coupled to the second load, the control module controls the fourth switch module K20 and the second switch module K30 to conduct, so that the first voltage conversion module 10 and the second voltage conversion module 20 jointly supply power to the second load. In this case, the first switch module K10 remains off. During this process, the voltage output by the first voltage conversion module 10 must be lower than the voltage output by the second voltage conversion module 20 to avoid a shutdown during full load dynamics.

[0047] Fourth mode: The second output terminal B is coupled to the load first, followed by the first output terminal A. For example, after the second output terminal B is coupled to the second load, the control module, in response to the first output terminal A being coupled to the first load, controls the first switch module K10 to turn on and the second switch module K30 to turn off, so that the first voltage conversion module 10 supplies power to the first load and the second voltage conversion module 20 supplies power to the second load. At this point, the fourth switch module K20 remains on.

[0048] In some embodiments, when a load is coupled to any output terminal, the power required by the load can be obtained first, and then the voltage conversion module to supply power to the load can be determined. For example, if the power required by the load exceeds the power of one voltage conversion module, a parallel solution can be used to utilize two or three voltage conversion modules.

[0049] During the control process, the control circuit can effectively control the output voltage of each voltage conversion module and the conduction time of each switch module, so as to accurately supply power to the load.

[0050] In this embodiment, a multi-channel voltage conversion module is connected in parallel. By controlling the output voltage of the parallel main circuit and bypass circuit, as well as the output time of the bypass circuit, the switch modules involved in the parallel operation are controlled to prevent backflow and achieve the function of the entire system outputting full load without shutdown. In addition, when the voltage conversion module of the power supply circuit 100 of this application is an AC-DC module, the power supply circuit 100 does not need to use a DC-DC module, which significantly improves power supply efficiency and reduces heat generation, effectively reducing the hardware cost of the power supply circuit. In other words, in this embodiment, dual-output power supply and dual-channel parallel operation to supply power to the same load can be achieved.

[0051] See Figure 2 , Figure 2 FIG1 is a schematic diagram of another embodiment of a power supply circuit provided by the present application. The power supply circuit 100 includes: a first voltage conversion module 10, a first transistor Q1, a second voltage conversion module 20, a second transistor Q4, a third transistor Q2, a fourth transistor Q3 and a control module (not shown).

[0052] A first terminal of the first transistor Q1 is coupled to the output terminal of the first voltage conversion module 10 , a second terminal of the first transistor Q1 is coupled to the first output terminal A of the power supply circuit 100 , and a control terminal of the first transistor Q1 is coupled to the control module.

[0053] A first terminal of the second transistor Q4 is coupled to the output terminal of the second voltage conversion module 20 , a second terminal of the second transistor Q4 is coupled to the second output terminal B of the power supply circuit 100 , and a control terminal of the second transistor Q4 is coupled to the control module.

[0054] A first end of the third transistor Q2 is coupled to the output end of the first voltage conversion module 10, a second end of the third transistor Q2 is coupled to the first end of the fourth transistor Q3, a second end of the fourth transistor Q3 is coupled to the output end of the second voltage conversion module 20, and control ends of the third transistor Q2 and the fourth transistor Q3 are coupled to the control module.

[0055] In some embodiments, in response to the first output terminal A being coupled to the first load, the control module controls the first transistor Q1, the third transistor Q2, and the fourth transistor Q3 to be turned on, so that the first voltage conversion module 10 and the second voltage conversion module 20 jointly supply power to the first load.

[0056] The fourth transistor Q3 has a body diode, an anode of the body diode is coupled to the output terminal of the second voltage conversion module 20 , and a cathode of the body diode is coupled to the second terminal of the third transistor Q2 .

[0057] The power supply circuit 100 of this embodiment has the following power supply modes:

[0058] The first method involves coupling only the first output terminal A to a load. For example, in response to the first output terminal A being coupled to the first load, the control module controls the first transistor Q1 and the third transistor Q2 to conduct. Due to the connection to the first load, the output voltage of the first voltage conversion module 10 is pulled down, and the second voltage conversion module 20 can supply power to the first load via the body diode of the fourth transistor Q3. Furthermore, upon detecting that the second voltage conversion module 20 has an output current, the control module controls the fourth transistor Q3 to conduct, and the first and second voltage conversion modules 10 and 20 jointly supply power to the first load. At this point, the second transistor Q4 remains off.

[0059] The second method involves coupling the first output terminal A to the load first, followed by coupling the second output terminal B to the load. For example, after the first output terminal A is coupled to the first load, the control module, in response to the second output terminal B being coupled to the second load, controls the second transistor Q4 to turn on, and the third and fourth transistors Q2 and Q3 to turn off, so that the first voltage conversion module 10 supplies power to the first load, and the second voltage conversion module 20 supplies power to the second load. At this point, the first transistor Q1 remains on.

[0060] The third type: Only the second output terminal B is coupled to the load. For example, in response to the second output terminal B being coupled to the second load, the control module controls the second transistor Q4 and the fourth transistor Q3 to turn on. At this time, due to the connection of the second load, the output voltage of the second voltage conversion module 20 is pulled down, and the first voltage conversion module 10 can supply power to the second load through the body diode of the third transistor Q2. Furthermore, after detecting that the first voltage conversion module 10 has an output current, the control module controls the third transistor Q2 to turn on, and the first voltage conversion module 10 and the second voltage conversion module 20 jointly supply power to the second load. At this time, the first transistor Q1 remains off. The anode of the body diode of the third transistor Q2 is coupled to the output terminal of the first voltage conversion module 10, and the cathode of the body diode of the third transistor Q2 is coupled to the first terminal of the fourth transistor Q3.

[0061] Fourth mode: The second output terminal B is coupled to the load first, and the first output terminal A is coupled to the load later. For example, after the second output terminal B is coupled to the second load, the control module, in response to the first output terminal A being coupled to the first load, controls the first transistor Q1 to turn on, and the third transistor Q2 and the fourth transistor Q3 to turn off, so that the first voltage conversion module 10 supplies power to the first load, and the second voltage conversion module 20 supplies power to the second load. At this time, the second transistor Q4 remains on.

[0062] During the control process, the control circuit can effectively control the output voltage of each voltage conversion module and the conduction time of each transistor, so as to accurately supply power to the load.

[0063] In this embodiment, a multi-channel voltage conversion module is connected in parallel. By controlling the output voltage of the parallel main circuit and bypass circuit, as well as the output time of the bypass circuit, the transistors involved in the parallel circuit are controlled to prevent backflow and achieve the function of the entire system outputting full load without shutdown. In addition, when the voltage conversion module of the power supply circuit 100 of this application is an AC-DC module, the power supply circuit 100 does not need to use a DC-DC module. The power supply efficiency is significantly improved, the heat generation is reduced, and the hardware cost of the power supply circuit is effectively reduced. In other words, in this embodiment, dual-output power supply and dual-channel parallel power supply to the same load can be achieved.

[0064] See Figure 3 , Figure 3 FIG1 is a schematic diagram of the structure of another embodiment of the power supply circuit provided by the present application. The power supply circuit 100 includes: a first voltage conversion module 10, a first switch module K10, a second voltage conversion module 20, a fourth switch module K20, a second switch module K30, a third voltage conversion module 30, a fifth switch module K40, a third switch module K50, and a control module (not shown).

[0065] The first voltage conversion module 10 is configured to receive alternating current and output direct current.

[0066] A first end of the first switch module K10 is coupled to the output end of the first voltage conversion module 10 , and a second end of the first switch module K10 is coupled to the first output end A of the power supply circuit 100 .

[0067] The second voltage conversion module 20 is configured to receive alternating current (AC) and output direct current (DC).

[0068] A first end of the fourth switch module K20 is coupled to the output end of the second voltage conversion module 20 , and a second end of the fourth switch module K20 is coupled to the second output end B of the power supply circuit 100 .

[0069] A first end of the second switch module K30 is coupled to the output end of the first voltage conversion module 10 , and a second end of the second switch module K30 is coupled to the output end of the second voltage conversion module 20 .

[0070] In some embodiments, the third voltage conversion module 30 may be an AC-DC module configured to receive alternating current (AC) and output direct current (DC).

[0071] In some embodiments, the third voltage conversion module 30 may be a DC-DC module configured to receive direct current (DC) power and output DC power.

[0072] A first end of the fifth switch module K40 is coupled to the output end of the third voltage conversion module 30 , and a second end of the fifth switch module K40 is coupled to the third output end C of the power supply circuit 100 .

[0073] A first end of the third switch module K50 is coupled to the output end of the third voltage conversion module 30 , and a second end of the third switch module K50 is coupled to the output end of the first voltage conversion module 10 .

[0074] The control module is respectively coupled to the first voltage conversion module 10 , the first switch module K10 , the second voltage conversion module 20 , the fourth switch module K20 , the second switch module K30 , the third voltage conversion module 30 , the fifth switch module K40 and the third switch module K50 .

[0075] The power supply circuit 100 of this embodiment has the following power supply modes:

[0076] The first method is to couple only the first output terminal A to the load. For example, in response to the first output terminal A being coupled to the first load, the control module controls the first switch module K10, the second switch module K30, and the third switch module K50 to be turned on, and the fourth switch module K20 and the fifth switch module K40 to be turned off, so that the first voltage conversion module 10, the second voltage conversion module 20, and the third voltage conversion module 30 jointly supply power to the first load.

[0077] The second method involves coupling the first output terminal A to the load first, and then coupling the second output terminal B to the load. For example, after the first output terminal A is coupled to the first load (after the first, second, and third voltage conversion modules 10, 20, and 30 jointly supply power to the first load), the control module, in response to the second output terminal B being coupled to the second load, controls the second switch module K30 to be turned off and the fourth switch module K20 to be turned on, so that the second voltage conversion module 20 supplies power to the second load, and the first and third voltage conversion modules 10, 30 jointly supply power to the first load. At this point, the first and third switch modules K10, K50 remain on, and the fifth switch module K40 remains off.

[0078] The third type: the first output terminal A is coupled to the load first, the second output terminal B is coupled to the load later, and the third output terminal C is coupled to the load. For example, after the first output terminal A is coupled to the first load and the second output terminal B is coupled to the second load (after the second voltage conversion module 20 supplies power to the second load, and the first voltage conversion module 10 and the third voltage conversion module 30 jointly supply power to the first load), the control module controls the third switch module K50 to be turned off and the fifth switch module K40 to be turned on in response to the third output terminal C being coupled to the third load, so that the third voltage conversion module 30 supplies power to the third load. At this time, the first switch module K10 and the fourth switch module K20 remain turned on, and the second switch module K30 remains turned off. That is, at this time, the second voltage conversion module 20 supplies power to the second load, the first voltage conversion module 10 supplies power to the first load, and the third voltage conversion module 30 supplies power to the third load.

[0079] Fourth mode: The first output terminal A is coupled to the load first, and the third output terminal C is coupled to the load later. For example, after the first output terminal A is coupled to the first load, the control module, in response to the third output terminal C being coupled to the third load, controls the third switch module K50 to be turned off and the fifth switch module K40 to be turned on, so that the third voltage conversion module 30 supplies power to the third load, and the first voltage conversion module 10 and the second voltage conversion module 20 jointly supply power to the first load. In this case, the first switch module K10 and the second switch module K30 remain turned on, and the fourth switch module K20 remains turned off.

[0080] Fifth method: The first output terminal A is coupled to the load first, the third output terminal C is coupled to the load later, and the second output terminal B is coupled to the load later. For example, after the first output terminal A is coupled to the first load and the third output terminal C is coupled to the third load, the control module, in response to the second output terminal B being coupled to the second load, controls the second switch module K30 to be turned off and the fourth switch module K20 to be turned on, so that the second voltage conversion module 20 supplies power to the second load. At this point, the first switch module K10 and the fourth switch module K20 remain on, and the third switch module K50 remains off. That is, the second voltage conversion module 20 supplies power to the second load, the first voltage conversion module 10 supplies power to the first load, and the third voltage conversion module 30 supplies power to the third load.

[0081] Type 6: Only the second output terminal B is coupled to the load. For example, in response to the second output terminal B being coupled to the second load, the control module controls the fourth switch module K20, the second switch module K30, and the third switch module K50 to conduct, so that the first voltage conversion module 10, the second voltage conversion module 20, and the third voltage conversion module 30 jointly supply power to the second load. At this time, the first switch module K10 and the fifth switch module K40 remain off.

[0082] Seventh option: The second output terminal B is coupled to the load first, and the first output terminal A is coupled to the load later. For example, after the second output terminal B is coupled to the second load, the control module, in response to the first output terminal A being coupled to the first load, controls the second switch module K30 to be turned off and the first switch module K10 to be turned on, so that the first voltage conversion module 10 and the third voltage conversion module 30 jointly supply power to the first load. That is, in this case, the second voltage conversion module 20 supplies power to the second load, the first voltage conversion module 10 supplies power to the first load, and the third voltage conversion module 30 supplies power to the first load. At this time, the fifth switch module K40 remains off, and the third switch module K50 remains on.

[0083] Eighth method: The second output terminal B is coupled to the load first, followed by the first output terminal A, and finally to the third output terminal C. For example, after the second output terminal B is coupled to the second load and the first output terminal A is coupled to the first load, the control module, in response to the third output terminal C being coupled to the third load, controls the third switch module K50 to be turned off and the fifth switch module K40 to be turned on, so that the third voltage conversion module 30 supplies power to the third load. In other words, in this case, the second voltage conversion module 20 supplies power to the second load, the first voltage conversion module 10 supplies power to the first load, and the third voltage conversion module 30 supplies power to the third load.

[0084] Ninth method: The second output terminal B is coupled to the load first, and the third output terminal C is coupled to the load later. For example, after the second output terminal B is coupled to the second load, the control module, in response to the third output terminal C being coupled to the third load, controls the third switch module K50 to be turned off and the fifth switch module K40 to be turned on, so that the third voltage conversion module 30 supplies power to the third load. In other words, in this case, the third voltage conversion module 30 supplies power to the third load, and the first voltage conversion module 10 and the second voltage conversion module 20 supply power to the second load.

[0085] Tenth method: The second output terminal B is coupled to the load first, the third output terminal C is coupled to the load later, and the first output terminal A is coupled to the load last. After the second output terminal B is coupled to the second load and the third output terminal C is coupled to the third load, the control module, in response to the first output terminal A being coupled to the first load, controls the second switch module K30 to be turned off and the first switch module K10 to be turned on, so that the first voltage conversion module 10 supplies power to the first load. In other words, in this case, the second voltage conversion module 20 supplies power to the second load, the first voltage conversion module 10 supplies power to the first load, and the third voltage conversion module 30 supplies power to the third load.

[0086] Method 11: Only the third output terminal C is coupled to the load. For example, in response to the third output terminal C being coupled to the third load, the control module controls the first switch module K10 and the fourth switch module K20 to be turned off, and the second switch module K30, the third switch module K50, and the fifth switch module K40 to be turned on, so that the first voltage conversion module 10, the second voltage conversion module 20, and the third voltage conversion module 30 jointly supply power to the third load.

[0087] Type 12: The third output terminal C is coupled to the load first, and the first output terminal A is coupled to the load later. For example, in some embodiments, after the third output terminal C is coupled to the third load, the control module, in response to the first output terminal A being coupled to the first load, controls the third switch module K50 to be turned off and the first switch module K10 to be turned on, so that the second voltage conversion module 20 and the first voltage conversion module 10 jointly supply power to the first load. In other words, in this case, the second voltage conversion module 20 and the first voltage conversion module 10 jointly supply power to the first load, and the third voltage conversion module 30 supplies power to the third load.

[0088] Thirteenth embodiment: The third output terminal C is coupled to the load first, followed by the first output terminal A, and finally to the load. For example, after the third output terminal C is coupled to the third load and the first output terminal A is coupled to the first load, the control module, in response to the second output terminal B being coupled to the second load, controls the second switch module K30 to be turned off and the fourth switch module K20 to be turned on, so that the second voltage conversion module 20 supplies power to the second load. In other words, at this point, the second voltage conversion module 20 supplies power to the second load, the first voltage conversion module 10 supplies power to the first load, and the third voltage conversion module 30 supplies power to the third load.

[0089] Fourteenth embodiment: The third output terminal C is coupled to the load first, and the second output terminal B is coupled to the load later. For example, after the third output terminal C is coupled to the third load, the control module, in response to the second output terminal B being coupled to the second load, controls the third switch module K50 to be turned off and the fourth switch module K20 to be turned on, so that the first voltage conversion module 10 and the second voltage conversion module 20 supply power to the second load. That is, in this case, the first voltage conversion module 10 and the second voltage conversion module 20 supply power to the second load, and the third voltage conversion module 30 supplies power to the third load.

[0090] Fifteenth method: The third output terminal C is coupled to the load first, followed by the second output terminal B, and finally to the first output terminal A. For example, after the third output terminal C is coupled to the third load and the second output terminal B is coupled to the second load, the control module, in response to the first output terminal A being coupled to the first load, controls the second switch module K30 to be turned off and the first switch module K10 to be turned on, so that the first voltage conversion module 10 supplies power to the first load. In other words, at this point, the second voltage conversion module 20 supplies power to the second load, the first voltage conversion module 10 supplies power to the first load, and the third voltage conversion module 30 supplies power to the third load.

[0091] During the control process, the control circuit can effectively control the output voltage of each voltage conversion module and the conduction time of each transistor, so as to accurately supply power to the load.

[0092] In this embodiment, a multi-channel voltage conversion module is connected in parallel. By controlling the output voltage of the parallel main circuit and bypass circuit, as well as the output time of the bypass circuit, the transistors involved in the parallel circuit are controlled to prevent backflow, thereby achieving the function of the entire system outputting full load without shutdown. In addition, the power supply circuit of this application does not require the use of DC-DC modules, which significantly improves power supply efficiency and reduces heat generation, effectively reducing the hardware cost of the power supply circuit. In other words, this embodiment can realize three-output power supply and multiple parallel circuits to supply power to the same load.

[0093] See Figure 4 , Figure 4 1 is a schematic diagram of the structure of another embodiment of the power supply circuit provided by the present application. The power supply circuit 100 includes: a first voltage conversion module 10, a first transistor Q1, a second voltage conversion module 20, a second transistor Q4, a third transistor Q2, a fourth transistor Q3, a third voltage conversion module 30, a fifth transistor Q9, a sixth transistor Q7, a seventh transistor Q8, and a control module (not shown).

[0094] The first end of the first transistor Q1 is coupled to the output end of the first voltage conversion module 10 , the second end of the first transistor Q1 is coupled to the first output end A of the power supply circuit 100 , and the control end of the first transistor Q1 is coupled to the control module.

[0095] A first terminal of the second transistor Q4 is coupled to the output terminal of the second voltage conversion module 20 , a second terminal of the second transistor Q4 is coupled to the second output terminal B of the power supply circuit 100 , and a control terminal of the second transistor Q4 is coupled to the control module.

[0096] A first end of the third transistor Q2 is coupled to the output end of the first voltage conversion module 10, a second end of the third transistor Q2 is coupled to the first end of the fourth transistor Q3, a second end of the fourth transistor Q3 is coupled to the output end of the second voltage conversion module 20, and control ends of the third transistor Q2 and the fourth transistor Q3 are coupled to the control module.

[0097] A first terminal of the fifth transistor Q9 is coupled to the output terminal of the third voltage conversion module 30 , and a second terminal of the fifth transistor Q9 is coupled to the third output terminal C of the power supply circuit 100 .

[0098] A first terminal of the sixth transistor Q7 is coupled to the output terminal of the first voltage conversion module 10 , a second terminal of the sixth transistor Q7 is coupled to the first terminal of the seventh transistor Q8 , and a second terminal of the seventh transistor Q8 is coupled to the output terminal of the third voltage conversion module 30 .

[0099] In which, a first body diode is provided in the fourth transistor Q3, an anode of the first body diode is coupled to the second end of the fourth transistor Q3, and a cathode of the first body diode is coupled to the first end of the fourth transistor Q3; a second body diode is provided in the seventh transistor Q8, an anode of the second body diode is coupled to the second end of the seventh transistor Q8, and a cathode of the first body diode is coupled to the first end of the seventh transistor Q8.

[0100] The power supply circuit 100 of this embodiment has the following power supply modes:

[0101] The first method is to couple only the first output terminal A to the load. For example, in response to the first output terminal A being coupled to the first load, the control module controls the first transistor Q1, the third transistor Q2, and the sixth transistor Q7 to turn on, so that the first voltage conversion module 10, the second voltage conversion module 20, and the third voltage conversion module 30 jointly supply power to the first load.

[0102] Second method: The first output terminal A is coupled to the load first, and the second output terminal B is coupled to the load later. For example, after the first output terminal A is coupled to the first load, the control module controls the third transistor Q2 to be turned off and the second transistor Q4 to be turned on in response to the second output terminal B being coupled to the second load, so that the second voltage conversion module 20 supplies power to the second load, and the first voltage conversion module 10 and the third voltage conversion module 30 jointly supply power to the first load.

[0103] The third method involves coupling the first output terminal A to the load first, then coupling the second output terminal B to the load, and finally coupling the third output terminal C to the load. For example, after the first output terminal A is coupled to the first load and the second output terminal B is coupled to the second load, the control module, in response to the third output terminal C being coupled to the third load, controls the sixth transistor Q7 to be turned off and the fifth transistor Q9 to be turned on, thereby enabling the third voltage conversion module 30 to supply power to the third load.

[0104] Fourth mode: the first output terminal A is coupled to the load first, and the third output terminal C is coupled to the load later. For example, after the first output terminal A is coupled to the first load, the control module controls the sixth transistor Q7 to be turned off and the fifth transistor Q9 to be turned on in response to the third output terminal C being coupled to the third load, so that the third voltage conversion module 30 supplies power to the third load, and the first voltage conversion module 10 and the second voltage conversion module 20 jointly supply power to the first load.

[0105] Fifth type: The first output terminal A is first coupled to the load, the third output terminal C is then coupled to the load, and the second output terminal B is then coupled to the load. For example, after the first output terminal A is coupled to the first load and the third output terminal C is coupled to the third load, the control module, in response to the second output terminal B being coupled to the second load, controls the third transistor Q2 to be turned off and the second transistor Q4 to be turned on, so that the second voltage conversion module 20 supplies power to the second load. At this time, the first transistor Q1 and the second transistor Q4 remain on, and the sixth transistor Q7 remains off. That is, at this time, the second voltage conversion module 20 supplies power to the second load, the first voltage conversion module 10 supplies power to the first load, and the third voltage conversion module 30 supplies power to the third load.

[0106] Sixth method: Only the second output terminal B is coupled to the load. Exemplarily, in response to the second output terminal B being coupled to the second load, the control module controls the second transistor Q4, the third transistor Q2, and the sixth transistor Q7 to turn on, so that the first voltage conversion module 10, the second voltage conversion module 20, and the third voltage conversion module 30 jointly supply power to the second load. In this case, the first transistor Q1 and the fifth transistor Q9 remain off.

[0107] Seventh type: The second output terminal B is coupled to the load first, and the first output terminal A is coupled to the load later. For example, after the second output terminal B is coupled to the second load, the control module, in response to the first output terminal A being coupled to the first load, controls the third transistor Q2 to be turned off and the first transistor Q1 to be turned on, so that the first voltage conversion module 10 and the third voltage conversion module 30 jointly supply power to the first load. That is, in this case, the second voltage conversion module 20 supplies power to the second load, the first voltage conversion module 10 supplies power to the first load, and the third voltage conversion module 30 supplies power to the first load. At this time, the fifth transistor Q9 remains off, and the sixth transistor Q7 remains on.

[0108] Eighth method: The second output terminal B is coupled to the load first, the first output terminal A is coupled to the load later, and the third output terminal C is coupled to the load later. For example, after the second output terminal B is coupled to the second load and the first output terminal A is coupled to the first load, the control module, in response to the third output terminal C being coupled to the third load, controls the sixth transistor Q7 to be turned off and the fifth transistor Q9 to be turned on, so that the third voltage conversion module 30 supplies power to the third load. In other words, in this case, the second voltage conversion module 20 supplies power to the second load, the first voltage conversion module 10 supplies power to the first load, and the third voltage conversion module 30 supplies power to the third load.

[0109] Ninth method: The second output terminal B is coupled to the load first, and the third output terminal C is coupled to the load later. For example, after the second output terminal B is coupled to the second load, the control module, in response to the third output terminal C being coupled to the third load, controls the sixth transistor Q7 to be turned off and the fifth transistor Q9 to be turned on, so that the third voltage conversion module 30 supplies power to the third load. In other words, in this case, the third voltage conversion module 30 supplies power to the third load, and the first voltage conversion module 10 and the second voltage conversion module 20 supply power to the second load.

[0110] Tenth method: The second output terminal B is coupled to the load first, the third output terminal C is coupled to the load later, and the first output terminal A is coupled to the load last. After the second output terminal B is coupled to the second load and the third output terminal C is coupled to the third load, the control module, in response to the first output terminal A being coupled to the first load, controls the third transistor Q2 to be turned off and the first transistor Q1 to be turned on, so that the first voltage conversion module 10 supplies power to the first load. In other words, in this case, the second voltage conversion module 20 supplies power to the second load, the first voltage conversion module 10 supplies power to the first load, and the third voltage conversion module 30 supplies power to the third load.

[0111] Method 11: Only the third output terminal C is coupled to the load. Exemplarily, in response to the third output terminal C being coupled to the third load, the control module controls the first transistor Q1 and the second transistor Q4 to be turned off, and the third transistor Q2, the seventh transistor Q8, and the fifth transistor Q9 to be turned on, so that the first voltage conversion module 10, the second voltage conversion module 20, and the third voltage conversion module 30 jointly supply power to the third load.

[0112] Type 12: The third output terminal C is coupled to the load first, and the first output terminal A is coupled to the load later. For example, in some embodiments, after the third output terminal C is coupled to the third load, the control module, in response to the first output terminal A being coupled to the first load, controls the sixth transistor Q7 to be turned off and the first transistor Q1 to be turned on, so that the second voltage conversion module 20 and the first voltage conversion module 10 jointly supply power to the first load. That is, in this case, the second voltage conversion module 20 and the first voltage conversion module 10 jointly supply power to the first load, and the third voltage conversion module 30 supplies power to the third load.

[0113] Thirteenth embodiment: The third output terminal C is coupled to the load first, followed by the first output terminal A, and finally the second output terminal B. For example, after the third output terminal C is coupled to the third load and the first output terminal A is coupled to the first load, the control module, in response to the second output terminal B being coupled to the second load, controls the third transistor Q2 to be turned off and the second transistor Q4 to be turned on, so that the second voltage conversion module 20 supplies power to the second load. In other words, at this point, the second voltage conversion module 20 supplies power to the second load, the first voltage conversion module 10 supplies power to the first load, and the third voltage conversion module 30 supplies power to the third load.

[0114] Fourteenth embodiment: The third output terminal C is coupled to the load first, and the second output terminal B is coupled to the load later. For example, after the third output terminal C is coupled to the third load, the control module, in response to the second output terminal B being coupled to the second load, controls the sixth transistor Q7 to be turned off and the second transistor Q4 to be turned on, so that the first voltage conversion module 10 and the second voltage conversion module 20 supply power to the second load. That is, in this case, the first voltage conversion module 10 and the second voltage conversion module 20 supply power to the second load, and the third voltage conversion module 30 supplies power to the third load.

[0115] Fifteenth method: The third output terminal C is coupled to the load first, the second output terminal B is coupled to the load later, and the first output terminal A is coupled to the load last. For example, after the third output terminal C is coupled to the third load and the second output terminal B is coupled to the second load, the control module, in response to the first output terminal A being coupled to the first load, controls the third transistor Q2 to be turned off and the first transistor Q1 to be turned on, so that the first voltage conversion module 10 supplies power to the first load. In other words, at this point, the second voltage conversion module 20 supplies power to the second load, the first voltage conversion module 10 supplies power to the first load, and the third voltage conversion module 30 supplies power to the third load.

[0116] During the control process, the control circuit can effectively control the output voltage of each voltage conversion module and the conduction time of each transistor, so as to accurately supply power to the load.

[0117] In this embodiment, a multi-channel voltage conversion module is connected in parallel. By controlling the output voltage of the parallel main circuit and bypass circuit, as well as the output time of the bypass circuit, the transistors involved in the parallel circuit are controlled to prevent backflow, thereby achieving the function of the entire system outputting full load without shutdown. In addition, the power supply circuit of this application does not require the use of DC-DC modules, which significantly improves power supply efficiency and reduces heat generation, effectively reducing the hardware cost of the power supply circuit. In other words, this embodiment can realize three-output power supply and multiple parallel circuits to supply power to the same load.

[0118] See Figure 5 , Figure 5FIG1 is a schematic diagram of the structure of another embodiment of the power supply circuit provided by the present application. The power supply circuit 100 includes: a first voltage conversion module 10, a first switch module K10, a second voltage conversion module 20, a fourth switch module K20, a second switch module K30, a third voltage conversion module 30, a fifth switch module K40, a third switch module K50, a sixth switch module K60, and a control module (not shown).

[0119] The third voltage conversion module 30 is configured to receive alternating current and output direct current.

[0120] A first end of the fifth switch module K40 is coupled to the output end of the third voltage conversion module 30 , and a second end of the fifth switch module K40 is coupled to the third output end C of the power supply circuit 100 ;

[0121] A first end of the third switch module K50 is coupled to the output end of the third voltage conversion module 30 , and a second end of the third switch module K50 is coupled to the output end of the first voltage conversion module 10 .

[0122] A first end of the sixth switch module K60 is coupled to the output end of the second voltage conversion module 20 , and a second end of the sixth switch module K60 is coupled to the output end of the third voltage conversion module 30 .

[0123] The power supply circuit 100 of this embodiment has the following power supply modes:

[0124] The first method involves coupling only the first output terminal A to the load. For example, in response to the first output terminal A being coupled to the first load, the control module controls the first switch module K10, the second switch module K30, and the third switch module K50 to conduct, so that the first voltage conversion module 10, the second voltage conversion module 20, and the third voltage conversion module 30 jointly supply power to the first load. Meanwhile, the fourth switch module K20, the fifth switch module K40, and the sixth switch module K60 remain off.

[0125] The second method involves coupling the first output terminal A to the load first, and then coupling the second output terminal B to the load. For example, after the first output terminal A is coupled to the first load, the control module, in response to the second output terminal B being coupled to the second load, controls the second switch module K30 to be turned off and the fourth switch module K20 to be turned on, so that the second voltage conversion module 20 supplies power to the second load, and the first and third voltage conversion modules 10 and 30 jointly supply power to the first load. At this point, the first and third switch modules K10 and K50 remain turned on, while the fifth and sixth switch modules K40 and K60 remain turned off.

[0126] The third method involves coupling the load to the first output terminal A first, the second output terminal B second, and the third output terminal C third. For example, after the first output terminal A is coupled to the first load and the second output terminal B is coupled to the second load, the control module, in response to the third output terminal C being coupled to the third load, controls the third switch module K50 to be turned off and the fifth switch module K40 to be turned on, so that the third voltage conversion module 30 supplies power to the third load. At this point, the first and fourth switch modules K10 and K20 remain turned on, while the sixth and second switch modules K60 and K30 remain turned off. That is, the second voltage conversion module 20 supplies power to the second load, the first voltage conversion module 10 supplies power to the first load, and the third voltage conversion module 30 supplies power to the third load.

[0127] Fourth mode: The first output terminal A is coupled to the load first, and the third output terminal C is coupled to the load later. For example, after the first output terminal A is coupled to the first load, the control module, in response to the third output terminal C being coupled to the third load, controls the third switch module K50 to be turned off and the fifth switch module K40 to be turned on, so that the third voltage conversion module 30 supplies power to the third load, and the first voltage conversion module 10 and the second voltage conversion module 20 jointly supply power to the first load. In this case, the first switch module K10 and the second switch module K30 remain turned on, while the fourth switch module K20 and the sixth switch module K60 remain turned off.

[0128] Fifth method: The first output terminal A is coupled to the load first, the third output terminal C is coupled to the load later, and the second output terminal B is coupled to the load later. For example, after the first output terminal A is coupled to the first load and the third output terminal C is coupled to the third load, the control module, in response to the second output terminal B being coupled to the second load, controls the second switch module K30 to be turned off and the fourth switch module K20 to be turned on, so that the second voltage conversion module 20 supplies power to the second load. At this time, the first switch module K10 and the fourth switch module K20 remain turned on, while the third switch module K50 and the sixth switch module K60 remain turned off. That is, at this time, the second voltage conversion module 20 supplies power to the second load, the first voltage conversion module 10 supplies power to the first load, and the third voltage conversion module 30 supplies power to the third load.

[0129] Type 6: Only the second output terminal B is coupled to the load. For example, in response to the second output terminal B being coupled to the second load, the control module controls the fourth switch module K20, the second switch module K30, and the sixth switch module K60 to conduct, so that the first voltage conversion module 10, the second voltage conversion module 20, and the third voltage conversion module 30 jointly supply power to the second load. At this time, the first switch module K10, the fifth switch module K40, and the third switch module K50 remain off.

[0130] Seventh method: The second output terminal B is coupled to the load first, and the first output terminal A is coupled to the load later. For example, after the second output terminal B is coupled to the second load, the control module, in response to the first output terminal A being coupled to the first load, controls the second switch module K30 and the sixth switch module K60 to be turned off, and the first switch module K10 and the third switch module K50 to be turned on, so that the first voltage conversion module 10 and the third voltage conversion module 30 jointly supply power to the first load. That is, in this case, the second voltage conversion module 20 supplies power to the second load, while the first voltage conversion module 10 and the third voltage conversion module 30 supply power to the first load. At this time, the fifth switch module K40 remains off, and the third switch module K50 remains on.

[0131] For example, after the second output terminal B is coupled to the second load, the control module, in response to the first output terminal A being coupled to the first load, controls the second switch module K30 and the third switch module K50 to be turned off, and the first switch module K10 and the sixth switch module K60 to be turned on, so that the second voltage conversion module 20 and the third voltage conversion module 30 jointly supply power to the second load, and the first voltage conversion module 10 supplies power to the first load. At this time, the fifth switch module K40 remains turned off.

[0132] Eighth method: The second output terminal B is coupled to the load first, the first output terminal A is coupled to the load later, and the third output terminal C is coupled to the load later. For example, after the second output terminal B is coupled to the second load and the first output terminal A is coupled to the first load, the control module, in response to the third output terminal C being coupled to the third load, controls the third switch module K50, the sixth switch module K60, and the second switch module K30 to be turned off, and the fifth switch module K40 to be turned on, so that the third voltage conversion module 30 supplies power to the third load. That is, in this case, the second voltage conversion module 20 supplies power to the second load, the first voltage conversion module 10 supplies power to the first load, and the third voltage conversion module 30 supplies power to the third load.

[0133] Ninth method: The second output terminal B is coupled to the load first, and the third output terminal C is coupled to the load later. For example, after the second output terminal B is coupled to the second load, the control module, in response to the third output terminal C being coupled to the third load, controls the third switch module K50 and the sixth switch module K60 to be turned off, and the fifth switch module K40 to be turned on, so that the third voltage conversion module 30 supplies power to the third load. In other words, in this case, the third voltage conversion module 30 supplies power to the third load, and the first voltage conversion module 10 and the second voltage conversion module 20 supply power to the second load.

[0134] For example, after the second output terminal B is coupled to the second load, the control module controls the second switch module K30 and the sixth switch module K60 to be turned off, and the fifth switch module K40 and the third switch module K50 to be turned on in response to the third output terminal C being coupled to the third load, so that the third voltage conversion module 30 and the first voltage conversion module 10 supply power to the third load. That is, at this time, the second voltage conversion module 20 supplies power to the second load, and the first voltage conversion module 10 and the third voltage conversion module 30 supply power to the third load.

[0135] Tenth method: The second output terminal B is coupled to the load first, the third output terminal C is coupled to the load later, and the first output terminal A is coupled to the load last. After the second output terminal B is coupled to the second load and the third output terminal C is coupled to the third load, the control module, in response to the first output terminal A being coupled to the first load, controls the second switch module K30, the third switch module K50, and the sixth switch module K60 to be turned off, and the first switch module K10, the fourth switch module K20, and the fifth switch module K40 to be turned on, so that the second voltage conversion module 20 supplies power to the second load, the first voltage conversion module 10 supplies power to the first load, and the third voltage conversion module 30 supplies power to the third load.

[0136] Method 11: Only the third output terminal C is coupled to the load. Exemplarily, in response to the third output terminal C being coupled to the third load, the control module controls the first switch module K10, the fourth switch module K20, and the second switch module K30 to be turned off, and the third switch module K50, the fifth switch module K40, and the sixth switch module K60 to be turned on, so that the first voltage conversion module 10, the second voltage conversion module 20, and the third voltage conversion module 30 jointly supply power to the third load.

[0137] Type 12: The third output terminal C is coupled to the load first, and the first output terminal A is coupled to the load later. For example, after the third output terminal C is coupled to the third load, the control module, in response to the first output terminal A being coupled to the first load, controls the third switch module K50 and the sixth switch module K60 to be turned off, and the first switch module K10 and the second switch module K30 to be turned on, so that the second voltage conversion module 20 and the first voltage conversion module 10 jointly supply power to the first load. In other words, in this case, the second voltage conversion module 20 and the first voltage conversion module 10 jointly supply power to the first load, and the third voltage conversion module 30 supplies power to the third load.

[0138] For example, after the third output terminal C is coupled to the third load, the control module controls the third switch module K50, the second switch module K30, and the fourth switch module K20 to be cut off, and the first switch module K10 and the sixth switch module K60 to be turned on in response to the first output terminal A being coupled to the first load, so that the second voltage conversion module 20 and the third voltage conversion module 30 jointly supply power to the third load, and the first voltage conversion module 10 supplies power to the first load.

[0139] Thirteenth embodiment: The third output terminal C is coupled to the load first, the first output terminal A is coupled to the load later, and the second output terminal B is coupled to the load. For example, after the third output terminal C is coupled to the third load and the first output terminal A is coupled to the first load, the control module, in response to the second output terminal B being coupled to the second load, controls the second switch module K30, the third switch module K50, and the sixth switch module K60 to be turned off, and the first switch module K10, the fourth switch module K20, and the fifth switch module K40 to be turned on, so that the second voltage conversion module 20 supplies power to the second load, the first voltage conversion module 10 supplies power to the first load, and the third voltage conversion module 30 supplies power to the third load.

[0140] Fourteenth embodiment: The third output terminal C is coupled to the load first, and the second output terminal B is coupled to the load later. For example, after the third output terminal C is coupled to the third load, the control module, in response to the second output terminal B being coupled to the second load, controls the third switch module K50 to be turned off and the fourth switch module K20 to be turned on, so that the first voltage conversion module 10 and the second voltage conversion module 20 supply power to the second load. That is, in this case, the first voltage conversion module 10 and the second voltage conversion module 20 supply power to the second load, and the third voltage conversion module 30 supplies power to the third load.

[0141] For example, after the third output terminal C is coupled to the third load, the control module controls the second switch module K30 and the sixth switch module K60 to be cut off, and the fourth switch module K20 and the third switch module K50 to be turned on in response to the second output terminal B being coupled to the second load, so that the first voltage conversion module 10 and the third voltage conversion module 30 supply power to the third load, and the second voltage conversion module 20 supplies power to the second load.

[0142] Fifteenth method: The third output terminal C is coupled to the load first, followed by the second output terminal B, and finally to the first output terminal A. For example, after the third output terminal C is coupled to the third load and the second output terminal B is coupled to the second load, the control module, in response to the first output terminal A being coupled to the first load, controls the second switch module K30 to be turned off and the first switch module K10 to be turned on, so that the first voltage conversion module 10 supplies power to the first load. In other words, at this point, the second voltage conversion module 20 supplies power to the second load, the first voltage conversion module 10 supplies power to the first load, and the third voltage conversion module 30 supplies power to the third load.

[0143] During the control process, the control circuit can effectively control the output voltage of each voltage conversion module and the conduction time of each transistor, so as to accurately supply power to the load.

[0144] In this embodiment, a multi-channel voltage conversion module is connected in parallel. By controlling the output voltage of the parallel main circuit and bypass circuit, as well as the output time of the bypass circuit, the transistors involved in the parallel circuit are controlled to prevent backflow, thereby achieving the function of the entire system outputting full load without shutdown. In addition, the power supply circuit of this application does not require the use of DC-DC modules, which significantly improves power supply efficiency and reduces heat generation, effectively reducing the hardware cost of the power supply circuit. In other words, in this embodiment, multiple output terminals can be powered and multiple channels can be connected in parallel to supply power to the same load.

[0145] See Figure 6 , Figure 6 1 is a schematic diagram of the structure of another embodiment of the power supply circuit provided by the present application. The power supply circuit 100 includes: a first voltage conversion module 10, a first transistor Q1, a second voltage conversion module 20, a second transistor Q4, a third transistor Q2, a fourth transistor Q3, a third voltage conversion module 30, a fifth transistor Q9, a sixth transistor Q7, a seventh transistor Q8, an eighth transistor Q5, a ninth transistor Q6, and a control module (not shown).

[0146] The first end of the first transistor Q1 is coupled to the output end of the first voltage conversion module 10 , the second end of the first transistor Q1 is coupled to the first output end A of the power supply circuit 100 , and the control end of the first transistor Q1 is coupled to the control module.

[0147] A first terminal of the second transistor Q4 is coupled to the output terminal of the second voltage conversion module 20 , a second terminal of the second transistor Q4 is coupled to the second output terminal B of the power supply circuit 100 , and a control terminal of the second transistor Q4 is coupled to the control module.

[0148] A first end of the third transistor Q2 is coupled to the output end of the first voltage conversion module 10, a second end of the third transistor Q2 is coupled to the first end of the fourth transistor Q3, a second end of the fourth transistor Q3 is coupled to the output end of the second voltage conversion module 20, and control ends of the third transistor Q2 and the fourth transistor Q3 are coupled to the control module.

[0149] A first terminal of the fifth transistor Q9 is coupled to the output terminal of the third voltage conversion module 30 , and a second terminal of the fifth transistor Q9 is coupled to the third output terminal C of the power supply circuit 100 .

[0150] A first terminal of the sixth transistor Q7 is coupled to the output terminal of the first voltage conversion module 10 , a second terminal of the sixth transistor Q7 is coupled to the first terminal of the seventh transistor Q8 , and a second terminal of the seventh transistor Q8 is coupled to the output terminal of the third voltage conversion module 30 .

[0151] A first terminal of the eighth transistor Q5 is coupled to the output terminal of the second voltage conversion module 20 , a second terminal of the eighth transistor Q5 is coupled to the first terminal of the ninth transistor Q6 , and a second terminal of the ninth transistor Q6 is coupled to the output terminal of the third voltage conversion module 30 .

[0152] The power supply circuit 100 of this embodiment has the following power supply modes:

[0153] The first method involves coupling only the first output terminal A to the load. For example, in response to the first output terminal A being coupled to the first load, the control module controls the first transistor Q1, the third transistor Q2, the fourth transistor Q3, the sixth transistor Q7, and the seventh transistor Q8 to turn on, so that the first voltage conversion module 10, the second voltage conversion module 20, and the third voltage conversion module 30 jointly supply power to the first load. At this time, the second transistor Q4, the fifth transistor Q9, the eighth transistor Q5, and the ninth transistor Q6 remain off.

[0154] The second method involves coupling the first output terminal A to the load first, and then coupling the second output terminal B to the load. For example, after the first output terminal A is coupled to the first load, the control module, in response to the second output terminal B being coupled to the second load, controls the third transistor Q2 to be turned off and the second transistor Q4 to be turned on, so that the second voltage conversion module 20 supplies power to the second load, and the first voltage conversion module 10 and the third voltage conversion module 30 jointly supply power to the first load. At this point, the first transistor Q1, the sixth transistor Q7, and the seventh transistor Q8 remain on, while the fifth transistor Q9, the eighth transistor Q5, and the ninth transistor Q6 remain off.

[0155] The third type: the first output terminal A is coupled to the load first, the second output terminal B is coupled to the load later, and the third output terminal C is coupled to the load. For example, after the first output terminal A is coupled to the first load and the second output terminal B is coupled to the second load, the control module controls the sixth transistor Q7 to be turned off and the fifth transistor Q9 to be turned on in response to the third output terminal C being coupled to the third load, so that the third voltage conversion module 30 supplies power to the third load. At this time, the first transistor Q1 and the second transistor Q4 remain on, and the eighth transistor Q5, the ninth transistor Q6, the third transistor Q2, and the fourth transistor Q3 remain off. That is, at this time, the second voltage conversion module 20 supplies power to the second load, the first voltage conversion module 10 supplies power to the first load, and the third voltage conversion module 30 supplies power to the third load.

[0156] Fourth mode: The first output terminal A is coupled to the load first, and the third output terminal C is coupled to the load later. For example, after the first output terminal A is coupled to the first load, the control module, in response to the third output terminal C being coupled to the third load, controls the sixth transistor Q7 to be turned off and the fifth transistor Q9 to be turned on, so that the third voltage conversion module 30 supplies power to the third load, and the first voltage conversion module 10 and the second voltage conversion module 20 jointly supply power to the first load. In this case, the first transistor Q1, the third transistor Q2, and the fourth transistor Q3 remain on, while the second transistor Q4, the eighth transistor Q5, and the ninth transistor Q6 remain off.

[0157] Fifth type: The first output terminal A is coupled to the load first, the third output terminal C is coupled to the load later, and the second output terminal B is coupled to the load later. For example, after the first output terminal A is coupled to the first load and the third output terminal C is coupled to the third load, the control module, in response to the second output terminal B being coupled to the second load, controls the third transistor Q2 to be turned off and the second transistor Q4 to be turned on, so that the second voltage conversion module 20 supplies power to the second load. At this time, the first transistor Q1 and the third transistor Q2 remain on, and the sixth transistor Q7 and the eighth transistor Q5 remain off. That is, at this time, the second voltage conversion module 20 supplies power to the second load, the first voltage conversion module 10 supplies power to the first load, and the third voltage conversion module 30 supplies power to the third load.

[0158] Type 6: Only the second output terminal B is coupled to the load. Exemplarily, in response to the second output terminal B being coupled to the second load, the control module controls the second transistor Q4, the third transistor Q2, and the eighth transistor Q5 to turn on, so that the first voltage conversion module 10, the second voltage conversion module 20, and the third voltage conversion module 30 jointly supply power to the second load. At this time, the first transistor Q1, the fifth transistor Q9, and the sixth transistor Q7 remain off.

[0159] Seventh method: The second output terminal B is coupled to the load first, and the first output terminal A is coupled to the load later. For example, after the second output terminal B is coupled to the second load, the control module, in response to the first output terminal A being coupled to the first load, controls the third transistor Q2 and the eighth transistor Q5 to be turned off, and the first transistor Q1 and the sixth transistor Q7 to be turned on, so that the first voltage conversion module 10 and the third voltage conversion module 30 jointly supply power to the first load. That is, in this case, the second voltage conversion module 20 supplies power to the second load, and the first voltage conversion module 10 and the third voltage conversion module 30 supply power to the first load. At this time, the fifth switch module K40 remains off, and the third switch module K50 remains on.

[0160] For example, after the second output terminal B is coupled to the second load, the control module, in response to the first output terminal A being coupled to the first load, controls the third transistor Q2 and the sixth transistor Q7 to be turned off, and the first transistor Q1, the eighth transistor Q5, and the ninth transistor Q6 to be turned on, so that the second voltage conversion module 20 and the third voltage conversion module 30 jointly supply power to the second load, and the first voltage conversion module 10 supplies power to the first load. At this time, the fifth transistor Q9 remains turned off.

[0161] Eighth method: The second output terminal B is coupled to the load first, the first output terminal A is coupled to the load later, and the third output terminal C is coupled to the load later. For example, after the second output terminal B is coupled to the second load and the first output terminal A is coupled to the first load, the control module, in response to the third output terminal C being coupled to the third load, controls the sixth transistor Q7, the eighth transistor Q5, and the third transistor Q2 to be turned off, and the fifth transistor Q9 to be turned on, so that the third voltage conversion module 30 supplies power to the third load. That is, in this case, the second voltage conversion module 20 supplies power to the second load, the first voltage conversion module 10 supplies power to the first load, and the third voltage conversion module 30 supplies power to the third load.

[0162] Ninth method: The second output terminal B is coupled to the load first, and the third output terminal C is coupled to the load later. For example, after the second output terminal B is coupled to the second load, the control module, in response to the third output terminal C being coupled to the third load, controls the sixth transistor Q7 and the eighth transistor Q5 to be turned off, and the fifth transistor Q9 to be turned on, so that the third voltage conversion module 30 supplies power to the third load. In other words, in this case, the third voltage conversion module 30 supplies power to the third load, and the first voltage conversion module 10 and the second voltage conversion module 20 supply power to the second load.

[0163] For example, after the second output terminal B is coupled to the second load, the control module, in response to the third output terminal C being coupled to the third load, controls the third transistor Q2 and the eighth transistor Q5 to be turned off, and the fifth transistor Q9 and the sixth transistor Q7 to be turned on, so that the third voltage conversion module 30 and the first voltage conversion module 10 supply power to the third load. That is, at this time, the second voltage conversion module 20 supplies power to the second load, and the first voltage conversion module 10 and the third voltage conversion module 30 supply power to the third load.

[0164] Tenth method: The second output terminal B is coupled to the load first, the third output terminal C is coupled to the load later, and the first output terminal A is coupled to the load last. After the second output terminal B is coupled to the second load and the third output terminal C is coupled to the third load, the control module, in response to the first output terminal A being coupled to the first load, controls the third transistor Q2, the sixth transistor Q7, and the eighth transistor Q5 to be turned off, and the first transistor Q1, the second transistor Q4, and the fifth transistor Q9 to be turned on, so that the second voltage conversion module 20 supplies power to the second load, the first voltage conversion module 10 supplies power to the first load, and the third voltage conversion module 30 supplies power to the third load.

[0165] Method 11: Only the third output terminal C is coupled to the load. Exemplarily, in response to the third output terminal C being coupled to the third load, the control module controls the first transistor Q1, the second transistor Q4, and the third transistor Q2 to be turned off, and the sixth transistor Q7, the seventh transistor Q8, the fifth transistor Q9, the eighth transistor Q5, and the ninth transistor Q6 to be turned on, so that the first voltage conversion module 10, the second voltage conversion module 20, and the third voltage conversion module 30 jointly supply power to the third load.

[0166] Twelfth method: The third output terminal C is coupled to the load first, and the first output terminal A is coupled to the load later. For example, after the third output terminal C is coupled to the third load, the control module, in response to the first output terminal A being coupled to the first load, controls the seventh transistor Q8 and the ninth transistor Q6 to be turned off, and the first transistor Q1, the third transistor Q2, and the fourth transistor Q3 to be turned on, so that the second voltage conversion module 20 and the first voltage conversion module 10 jointly supply power to the first load. That is, in this case, the second voltage conversion module 20 and the first voltage conversion module 10 jointly supply power to the first load, and the third voltage conversion module 30 supplies power to the third load.

[0167] Illustratively, after the third output terminal C is coupled to the third load, the control module controls the sixth transistor Q7, the third transistor Q2, and the second transistor Q4 to be turned off, and the first transistor Q1, the eighth transistor Q5, and the ninth transistor Q6 to be turned on in response to the first output terminal A being coupled to the first load, so that the second voltage conversion module 20 and the third voltage conversion module 30 jointly supply power to the third load, and the first voltage conversion module 10 supplies power to the first load.

[0168] Thirteenth mode: The third output terminal C is first coupled to the load, the first output terminal A is then coupled to the load, and the second output terminal B is then coupled to the load. For example, after the third output terminal C is coupled to the third load and the first output terminal A is coupled to the first load, the control module, in response to the second output terminal B being coupled to the second load, controls the third transistor Q2, the fourth transistor Q3, the sixth transistor Q7, the seventh transistor Q8, the eighth transistor Q5, and the ninth transistor Q6 to be turned off, and the first transistor Q1, the second transistor Q4, and the fifth transistor Q9 to be turned on, so that the second voltage conversion module 20 supplies power to the second load, the first voltage conversion module 10 supplies power to the first load, and the third voltage conversion module 30 supplies power to the third load.

[0169] Fourteenth embodiment: The third output terminal C is coupled to the load first, and the second output terminal B is coupled to the load later. For example, after the third output terminal C is coupled to the third load, the control module, in response to the second output terminal B being coupled to the second load, controls the sixth transistor Q7 and the seventh transistor Q8 to be turned off, and the second transistor Q4 to be turned on, so that the first voltage conversion module 10 and the second voltage conversion module 20 supply power to the second load. That is, in this case, the first voltage conversion module 10 and the second voltage conversion module 20 supply power to the second load, and the third voltage conversion module 30 supplies power to the third load.

[0170] Illustratively, after the third output terminal C is coupled to the third load, the control module controls the third transistor Q2, the fourth transistor Q3, the eighth transistor Q5 and the ninth transistor Q6 to be turned off, and the second transistor Q4, the sixth transistor Q7 and the seventh transistor Q8 to be turned on in response to the second output terminal B being coupled to the second load, so that the first voltage conversion module 10 and the third voltage conversion module 30 supply power to the third load, and the second voltage conversion module 20 supplies power to the second load.

[0171] Fifteenth method: The third output terminal C is first coupled to the load, followed by the second output terminal B, and finally the first output terminal A. For example, after the third output terminal C is coupled to the third load and the second output terminal B is coupled to the second load, the control module, in response to the first output terminal A being coupled to the first load, controls the third transistor Q2 and the fourth transistor Q3 to be turned off and the first transistor Q1 to be turned on, so that the first voltage conversion module 10 supplies power to the first load. That is, at this point, the second voltage conversion module 20 supplies power to the second load, the first voltage conversion module 10 supplies power to the first load, and the third voltage conversion module 30 supplies power to the third load.

[0172] During the control process, the control circuit can effectively control the output voltage of each voltage conversion module and the conduction time of each transistor, so as to accurately supply power to the load.

[0173] In this embodiment, a multi-channel voltage conversion module is connected in parallel. By controlling the output voltage of the parallel main circuit and bypass circuit, as well as the output time of the bypass circuit, the transistors involved in the parallel circuit are controlled to prevent backflow, thereby achieving the function of the entire system outputting full load without shutdown. In addition, the power supply circuit of this application does not require the use of DC-DC modules, which significantly improves power supply efficiency and reduces heat generation, effectively reducing the hardware cost of the power supply circuit. In other words, in this embodiment, multiple output terminals can be powered and multiple channels can be connected in parallel to supply power to the same load.

[0174] The first transistor Q1, the second transistor Q4, the third transistor Q2, the fourth transistor Q3, the fifth transistor Q9, the sixth transistor Q7, the seventh transistor Q8, the eighth transistor Q5, and the ninth transistor Q6 mentioned in any of the above embodiments all have corresponding body diodes. The above transistors may be MOS transistors.

[0175] For example, the anode of the body diode of the first transistor Q1 is coupled to the first output terminal A, and the cathode of the body diode of the first transistor Q1 is coupled to the output terminal of the first voltage conversion module 10 .

[0176] An anode of the body diode of the second transistor Q4 is coupled to the second output terminal B, and a cathode of the body diode of the second transistor Q4 is coupled to the output terminal of the second voltage conversion module 20 .

[0177] An anode of the body diode of the third transistor Q2 is coupled to the output terminal of the first voltage conversion module 10 , and a cathode of the body diode of the third transistor Q2 is coupled to the first terminal of the fourth transistor Q3 .

[0178] An anode of the body diode of the fourth transistor Q3 is coupled to the second terminal of the fourth transistor Q3 , and a cathode of the body diode of the fourth transistor Q3 is coupled to the first terminal of the fourth transistor Q3 .

[0179] An anode of the body diode of the fifth transistor Q9 is coupled to the third output terminal C, and a cathode of the body diode of the fifth transistor Q9 is coupled to the output terminal of the third voltage conversion module 30 .

[0180] An anode of the body diode of the sixth transistor Q7 is coupled to the output terminal of the first voltage conversion module 10 , and a cathode of the body diode of the sixth transistor Q7 is coupled to the first terminal of the seventh transistor Q8 .

[0181] An anode of the body diode of the seventh transistor Q8 is coupled to the output terminal of the third voltage conversion module 30 , and a cathode of the body diode of the seventh transistor Q8 is coupled to the first terminal of the seventh transistor Q8 .

[0182] An anode of the body diode of the eighth transistor Q5 is coupled to the output terminal of the second voltage conversion module 20 , and a cathode of the body diode of the eighth transistor Q5 is coupled to the first terminal of the ninth transistor Q6 .

[0183] An anode of the body diode of the ninth transistor Q6 is coupled to the output terminal of the third voltage conversion module 30 , and a cathode of the body diode of the ninth transistor Q6 is coupled to the first terminal of the ninth transistor Q6 .

[0184] In one application scenario, the output circuit corresponding to the first output terminal A is defined as L1, the output circuit corresponding to the second output terminal B is defined as L2, and the output circuit corresponding to the third output terminal C is defined as L3.

[0185] 1. After the power supply circuit 100 is powered on, the control circuit normally detects whether a load (device) is plugged into the output terminal. At this time, all MOS (transistors) remain in the off (cut-off) state.

[0186] 2. When a device is plugged into L1 and no other output ports are plugged in, the protocol chip A1 of L1 shakes hands with the device protocol. If the power does not exceed the power of the first voltage conversion module 10, it is directly output from the first voltage conversion module 10; if the required power is greater than or equal to the maximum power of the entire machine, the voltages of the first voltage conversion module 10, the second voltage conversion module 20 and the third voltage conversion module 30 corresponding to L1, L2 and L3 will all be increased to the voltage required by the device.

[0187] 3. The protocol chip A1 of L1 feeds back the corresponding information to the control circuit. The control circuit controls the first transistor Q1 to turn on first, and then controls the third transistor Q2 and the sixth transistor Q7 to turn on at the same time. At the same time, the second voltage conversion module 20 and the third voltage conversion module 30 adjust the voltage to 0.1-0.4V lower than the set voltage. For example, the specific voltage difference can also be 0.2V. (This point is the key point. It is related to whether the voltage of the second voltage conversion module 20 and the third voltage conversion module 30 will be higher than the voltage of the first voltage conversion module 10. If it is higher than the first voltage conversion module 10, one or both of them will pass through the fourth transistor Q3 / seventh transistor Q8 body diode, and then be poured into the first voltage conversion module 10 through the opened Q2 / Q7, so that the voltage conversion of this route (first voltage conversion module 10) does not work. When loaded, it cannot provide full load and the power will be pulled to death).

[0188] 4. The protocol chip A1 sends a ready signal to the device. At this time, the first voltage conversion module 10 begins to carry the load. Since the transformer of the first voltage conversion module 10 can only output a portion of the power, the voltage of the first voltage conversion module 10 will be pulled down. When the voltage of the first voltage conversion module 10 is pulled down to a level lower than that of the second voltage conversion module 20 and the third voltage conversion module 30, the second voltage conversion module 20 and the third voltage conversion module 30 will supply power to the first voltage conversion module 10 through the body diodes of the fourth transistor Q3 and the seventh transistor Q8, and then through the turned-on third transistor Q2 and sixth transistor Q7. At this time, full load output is possible, but the fourth transistor Q3 and the seventh transistor Q8 are not yet turned on.

[0189] 5. When the second voltage conversion module 20 and the third voltage conversion module 30 detect output current without turning on the second transistor Q4 and the fifth transistor Q9, they will turn on the fourth transistor Q3 and the seventh transistor Q8. At this time, the three voltage conversions provide one output. However, due to the problem of different voltage levels, the current of the three outputs is unbalanced.

[0190] 6. The protocol chips for L1, L2, and L3 will continuously monitor the output current. If the current of any channel is too large and the difference between the other two channels is not much, the voltage of the channel with excessive current will be fine-tuned and reduced until the three currents are balanced. If the current of one channel is large, one channel is small, and one channel is in the middle, the output voltage of the channel with large current will be fine-tuned and reduced, while the voltage of the channel with small current will be fine-tuned and increased until the three currents are balanced.

[0191] 7. At this point, the single-port full-load power output is completed.

[0192] Furthermore, at this time, if there is a device inserted into the output, such as L2, the protocol chip B1 of L2 will immediately communicate with the protocol chip A1 of L1, indicating that there is a device inserted into L2.

[0193] 9. The protocol chip A1 on L1 immediately resends a packet to the current device, and the power is reduced to the maximum power of L1 and L3 combined, and then the device is charged again.

[0194] 10. At the same time, the third transistor Q2 and the fourth transistor Q3 bridging the L1 and L2 paths are turned off together, and the voltage of the L2 path drops to 5V.

[0195] 11. The protocol chip B1 on L2 begins a protocol handshake with the inserted device. Protocol chip B1 only announces the maximum power that L2 can output. After the handshake is successful, the voltage on L2 rises to the voltage required by the device, and the second transistor Q4 is turned on, giving the device the maximum power that L2 can output.

[0196] 12. At this point, the switch from single-port to dual-port is completed.

[0197] 13. When devices are plugged into L1 and L2 at the same time, if L3 is plugged in, the protocol chip C1 of L3 will immediately communicate with the protocol chip A1, telling the protocol chip A1 that a device is plugged into L3 and output is required.

[0198] 14. Protocol chip A1 immediately resends a packet to the current device, reducing the power declared to the maximum power that channel A can output, and then recharges the device.

[0199] 15. At the same time, the sixth transistor Q7 and the seventh transistor Q8 bridging the L1 and L3 paths are turned off together, and the voltage of the L3 path drops to 5V.

[0200] 16. The protocol chip C1 on channel L3 begins a protocol handshake with the inserted device. The protocol chip C1 announces the maximum power that channel C can output. After the handshake succeeds, the voltage on channel L3 rises to the device's required voltage, and the fifth transistor Q9 turns on, providing the device with the maximum power that channel L3 can output.

[0201] 17. The switch from dual-port to triple-port is now complete.

[0202] By controlling the output voltage of the parallel main circuit and bypass circuit and the output time of the bypass circuit, the transistors involved in the parallel circuit are controlled to prevent backflow, thereby realizing a parallel circuit solution with full load output and no downtime of the entire system.

[0203] See Figure 7 , Figure 7 FIG1 is a schematic diagram of another embodiment of a power supply circuit provided by the present application. The power supply circuit 100 includes: a first voltage conversion module 10, a first switch module K10, a second voltage conversion module 20, a second switch module K30 and a control module (not shown).

[0204] A first end of the first switch module K10 is coupled to the output end of the first voltage conversion module 10 , and a second end of the first switch module K10 is coupled to the first output end A of the power supply circuit 100 .

[0205] A first end of the second switch module K30 is coupled to the output end of the first voltage conversion module 10 , and a second end of the second switch module K30 is coupled to the output end of the second voltage conversion module 20 and the second output end B of the power supply circuit 100 .

[0206] The control module is respectively coupled to the first voltage conversion module 10 , the first switch module K10 , the second voltage conversion module 20 , and the second switch module K30 .

[0207] In response to the first output terminal A being coupled to the first load, the control module controls the first switch module K10 and the second switch module K30 to be turned on, so that the first voltage conversion module 10 and the second voltage conversion module 20 jointly supply power to the first load.

[0208] In this embodiment, a multi-channel voltage conversion module parallel connection scheme is adopted to realize multi-channel parallel operation, thereby utilizing the multi-channel voltage conversion module to realize the single-channel full load function, which can effectively reduce the design requirements for the device and save the hardware cost of the power supply circuit and power supply equipment.

[0209] See Figure 8 , Figure 8 FIG1 is a schematic diagram of another embodiment of a power supply circuit provided by the present application. The power supply circuit 100 includes: a first voltage conversion module 10, a first switch module K10, a second voltage conversion module 20, a second switch module K30, a third voltage conversion module 30, a third switch module K50, and a control module (not shown).

[0210] A first end of the third switch module K50 is coupled to the output end of the third voltage conversion module 30 , and a second end of the third switch module K50 is coupled to the output end of the first voltage conversion module 10 and the third output end C of the power supply circuit 100 .

[0211] In which, in response to the first output terminal A being coupled to the first load, the control module controls the first switch module K10, the second switch module K30 and the third switch module K50 to be turned on, so that the first voltage conversion module 10, the second voltage conversion module 20 and the third voltage conversion module 30 jointly supply power to the first load.

[0212] After the first output terminal A is coupled to the first load, the control module controls the second switch module K20 to be cut off in response to the second output terminal B of the power supply circuit 100 being coupled to the second load, so that the second voltage conversion module 20 supplies power to the second load, and the first voltage conversion module 10 and the third voltage conversion module 30 jointly supply power to the first load.

[0213] After the first output terminal A is coupled to the first load and the second output terminal B is coupled to the second load, the control module controls the third switch module K50 to be turned off in response to the third output terminal C of the power supply circuit 100 being coupled to the third load, so that the third voltage conversion module 30 supplies power to the third load.

[0214] In the power supply circuit 100 of any of the above embodiments, when only the first output terminal A is coupled to the first load, the control module controls the output voltage of the second voltage conversion module 20 to be lower than the output voltage of the first voltage conversion module 10, and / or the control module controls the output voltage of the third voltage conversion module 30 to be lower than the output voltage of the first voltage conversion module 10.

[0215] In the power supply circuit 100 of any of the above embodiments, when only the first output terminal A is coupled to the first load, the output voltage of the second voltage conversion module 20 is at least 0.1-0.4V lower than the output voltage of the first voltage conversion module 10, and / or the output voltage of the third voltage conversion module 30 is at least 0.1-0.4V lower than the output voltage of the first voltage conversion module 10. The specific voltage difference may also be 0.2V.

[0216] In the power supply circuit 100 of any of the above embodiments, the control module monitors the output currents of the first voltage conversion module 10 and the second voltage conversion module 20 and adjusts the output voltages of the first voltage conversion module 10 and the second voltage conversion module 20 according to the output currents.

[0217] In the power supply circuit 100 of any of the above embodiments, the control module monitors the first output current of the first voltage conversion module 10, the second output current of the second voltage conversion module 20 and the third output current of the third voltage conversion module 30. In response to the fact that one of the first output current, the second output current and the third output current is greater than the first threshold value, and the difference between the other two is less than the second threshold value and is less than one, the control module lowers the output voltage corresponding to one of the first output current, the second output current and the third output current.

[0218] In response to the first output current, the second output current, and the third output current being greater than the second current, and the second output current being greater than the third current, the output voltage corresponding to the first output current is adjusted downward, and the output voltage corresponding to the third output current is adjusted upward. This achieves current balance among the three corresponding voltage conversion modules. For example, if the first output current is greater than the second output current, and the second output current is greater than the third output current, the output voltage of the first voltage conversion module corresponding to the first output current is adjusted downward, and the output voltage of the third voltage conversion module corresponding to the third output current is adjusted upward. If the second output current is greater than the first output current, and the first output current is greater than the third output current, the output voltage of the second voltage conversion module corresponding to the second output current is adjusted downward, and the output voltage of the third voltage conversion module corresponding to the third output current is adjusted upward.

[0219] See Figure 9 , Figure 9 is a schematic diagram of the structure of an embodiment of a power supply device provided in this application. The power supply device 200 includes a power supply circuit 100. The power supply circuit 100 is the same as the power supply circuit 100 of any of the above embodiments. In some embodiments, the power supply device 200 can be a multi-output device. That is, the power supply device 200 can support multiple power supply channels. Furthermore, the power supply device 200 can be a charger or mobile power supply that can charge at least two electronic devices simultaneously.

[0220] To sum up, the power supply circuit and power supply equipment provided in the present application adopt a parallel scheme of multiple voltage conversion modules, and control the switch modules involved in the parallel operation by controlling the output voltage of the parallel main line and the bypass and the output time of the bypass to achieve a situation where there is no backflow, so as to realize the function of the whole machine outputting full load without shutting down, and there is no need to use a DC-DC module in the power supply circuit of the present application, the power supply efficiency will be significantly improved, and the heat generation will be reduced, effectively reducing the hardware cost of the power supply circuit.

[0221] Furthermore, three or more circuits can be connected for parallel power supply.

[0222] Furthermore, the transformers of the parallel machines do not need to have the same power, and the protocol software can be adjusted to balance the load according to the size of the transformers.

[0223] Furthermore, when a single port is fully loaded, parallel operation can evenly distribute the heat, preventing a sudden temperature rise at any one point, and is more conducive to balancing the shell temperature.

[0224] Furthermore, it is possible to achieve maximum power output for blind plugging of multiple ports. That is, in multiple groups of voltage conversion modules, the power supply circuit 100 can still achieve power transfer from a single blind plug port to other ports without requiring a DC-DC conversion module.

[0225] The above descriptions are only some embodiments of the present application and do not limit the scope of protection of the present application. Any equivalent device or equivalent process transformation made using the contents of the description and drawings of this application, or directly or indirectly applied in other related technical fields, are also included in the scope of patent protection of this application.

Claims

1. A power supply circuit, characterized in that: The power supply circuit includes: a first voltage conversion module; a first switch module, wherein a first end of the first switch module is coupled to the output end of the first voltage conversion module, and a second end of the first switch module is coupled to the first output end of the power supply circuit; a second voltage conversion module; a second switch module, wherein a first end of the second switch module is coupled to the output end of the first voltage conversion module, and a second end of the second switch module is coupled to the output end of the second voltage conversion module; a control module, coupled to the first voltage conversion module, the first switch module, the second voltage conversion module, and the second switch module respectively; In response to the first output terminal being coupled to a first load, the control module controls the first switch module and the second switch module to be turned on, so that the first voltage conversion module and the second voltage conversion module jointly supply power to the first load.

2. The power supply circuit according to claim 1, wherein: The power supply circuit further includes: a third voltage conversion module; a third switch module, wherein a first end of the third switch module is coupled to the output end of the third voltage conversion module, and a second end of the third switch module is coupled to the output end of the first voltage conversion module; In which, in response to the first output end being coupled to the first load, the control module controls the first switch module, the second switch module and the third switch module to be turned on, so that the first voltage conversion module, the second voltage conversion module and the third voltage conversion module jointly supply power to the first load.

3. The power supply circuit according to claim 2, wherein: After the first output terminal is coupled to the first load, the control module controls the second switch module to be cut off in response to the second output terminal of the power supply circuit being coupled to the second load, so that the second voltage conversion module supplies power to the second load, and the first voltage conversion module and the third voltage conversion module jointly supply power to the first load.

4. The power supply circuit according to claim 3, characterized in that: After the first output terminal is coupled to the first load and the second output terminal is coupled to the second load, the control module controls the third switch module to be cut off in response to the third output terminal of the power supply circuit being coupled to the third load, so that the third voltage conversion module supplies power to the third load.

5. The power supply circuit according to claim 2, characterized in that: The power supply circuit further includes: a fourth switch module, a first end of the fourth switch module is coupled to the output end of the second voltage conversion module, and a second end of the fourth switch module is coupled to the second output end of the power supply circuit; a fifth switch module, wherein a first end of the fifth switch module is coupled to the output end of the third voltage conversion module, and a second end of the fifth switch module is coupled to the third output end of the power supply circuit; The first switch module includes a first transistor, a first terminal of the first transistor is coupled to the output terminal of the first voltage conversion module, a second terminal of the first transistor is coupled to the first output terminal of the power supply circuit, and a control terminal of the first transistor is coupled to the control module; The fourth switch module includes a second transistor, a first terminal of the second transistor is coupled to the output terminal of the second voltage conversion module, a second terminal of the second transistor is coupled to the second output terminal of the power supply circuit, and a control terminal of the second transistor is coupled to the control module; The second switch module includes a third transistor and a fourth transistor, wherein a first end of the third transistor is coupled to the output end of the first voltage conversion module, a second end of the third transistor is coupled to the first end of the fourth transistor, a second end of the fourth transistor is coupled to the output end of the second voltage conversion module, and control ends of the third transistor and the fourth transistor are coupled to the control module; The fifth switch module includes a fifth transistor, a first end of the fifth transistor is coupled to the output end of the third voltage conversion module, and a second end of the fifth transistor is coupled to the third output end of the power supply circuit; The fourth switch module includes a sixth transistor and a seventh transistor, the first end of the sixth transistor is coupled to the output end of the first voltage conversion module, the second end of the sixth transistor is coupled to the first end of the seventh transistor, and the second end of the seventh transistor is coupled to the output end of the third voltage conversion module.

6. The power supply circuit according to claim 5, characterized in that: A first body diode is provided in the fourth transistor, an anode of the first body diode is coupled to the second end of the fourth transistor, and a cathode of the first body diode is coupled to the first end of the fourth transistor; A second body diode is provided in the seventh transistor, an anode of the second body diode is coupled to the second terminal of the seventh transistor, and a cathode of the first body diode is coupled to the first terminal of the seventh transistor; In which, in response to the first output terminal being coupled to the first load, the control module controls the first transistor, the third transistor and the sixth transistor to be turned on, so that the first voltage conversion module, the second voltage conversion module and the third voltage conversion module jointly supply power to the first load.

7. The power supply circuit according to claim 6, characterized in that: After the first output terminal is coupled to the first load, the control module controls the third transistor to be turned off and the second transistor to be turned on in response to the second output terminal being coupled to the second load, so that the second voltage conversion module supplies power to the second load, and the first voltage conversion module and the third voltage conversion module jointly supply power to the first load.

8. The power supply circuit according to claim 5, characterized in that: The power supply circuit further includes: a sixth switch module, a first end of the sixth switch module is coupled to the output end of the second voltage conversion module, and a second end of the sixth switch module is coupled to the output end of the third voltage conversion module.

9. The power supply circuit according to claim 8, characterized in that: The sixth switch module includes an eighth transistor and a ninth transistor; the first end of the eighth transistor is coupled to the output end of the second voltage conversion module, the second end of the eighth transistor is coupled to the first end of the ninth transistor, and the second end of the ninth transistor is coupled to the output end of the third voltage conversion module.

10. A power supply device, characterized in that: The power supply device includes the power supply circuit according to any one of claims 1 to 9.

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