Power supply circuit

Abstract

The utility model relates to the technical field of power supply circuits, and discloses a power supply circuit, which comprises a power supply module and at least two power utilization units, the at least two power utilization units comprise at least one first power utilization unit and at least one second power utilization unit, and the working voltages of the first power utilization unit and the second power utilization unit are different; the output end of the power supply module is connected with the input end of the first power utilization unit through the first voltage conversion module, and the output end of the power supply module is connected with the input end of the second power utilization unit. According to the utility model, through the arrangement of the first voltage conversion module, when the working voltage of the first power utilization unit and the working voltage of the second power utilization unit are different, the power supply module can directly provide appropriate working voltage for the second power utilization unit on one hand, and can provide appropriate working voltage for the first power utilization unit through the first voltage conversion module on the other hand; according to the utility model, each power utilization unit is ensured to operate at a proper working voltage, so that the working performance reduction or fault caused by voltage mismatching is avoided, the power consumption of the whole circuit is effectively reduced, the unnecessary energy loss is reduced, the energy efficiency of the circuit is improved, and the service life of the whole circuit is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of power supply circuits, in particular to a power supply circuit. Background Art

[0002] In the power supply system, the power supply module plays a vital role. When the power supply module starts working, it usually needs to provide power to multiple different power consumption units. These power consumption units are connected to the power supply module through their own independent power supply branches to meet their specific voltage requirements. Since different power consumption units have differences in design, function and working characteristics, their voltage requirements are also different.

[0003] Take a mouse circuit powered by a single dry cell battery as an example. In this circuit, the dry cell battery is the only power source and needs to provide power to multiple power-consuming units such as the CPU (Central Processing Unit) and the Sensor. However, the problem is that when the power supply module adjusts the operating voltage output to the CPU to an appropriate range, the operating voltage obtained by the Sensor may be too high. This voltage mismatch will affect the performance of the Sensor and may even cause a malfunction. What is more serious is that a high operating voltage of the Sensor will also increase the power consumption of the entire circuit. The increase in power consumption will not only affect the battery life of the mouse and reduce the user experience, but may also cause thermal damage to other components in the circuit and shorten the service life of the entire circuit.

[0004] Therefore, how to ensure that each power-consuming unit can operate at a suitable operating voltage without affecting the working performance through reasonable circuit design and component selection, while achieving low power consumption of the entire circuit, has become one of the technical problems that need to be urgently solved in this field.

[0005] The above information is presented as background information only to assist with understanding the present disclosure and no determination or admission is made as to whether any of the above may be used as prior art with respect to the present disclosure. Utility Model Content

[0006] The utility model provides a power supply circuit to ensure that each power-consuming unit can operate under a suitable working voltage.

[0007] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0008] A power supply circuit comprises a power supply module and a power unit group, wherein the power unit group comprises at least one first power unit and at least one second power unit, and the first power unit and the second power unit have different operating voltages;

[0009] The output end of the power supply module is connected to the input end of the first power consumption unit through the first voltage conversion module, and the output end of the power supply module is connected to the input end of the second power consumption unit.

[0010] Further, in the power supply circuit, the power supply module includes a battery and a first boost unit;

[0011] The input end of the first boost unit is connected to the battery, and the output end of the first boost unit serves as the output end of the power supply module.

[0012] Further, in the power supply circuit, the first boost unit includes an input filter, a first inductor, a DCDC converter and an output filter connected in sequence;

[0013] The input end of the input filter is connected to the battery, and the output end of the output filter serves as the output end of the first boost unit.

[0014] Further, in the power supply circuit, the operating voltage of the second power unit is greater than the operating voltage of the first power unit;

[0015] The first voltage conversion module includes a step-down unit;

[0016] The output end of the power supply module is connected to the input end of the first power consumption unit through the step-down unit.

[0017] Furthermore, in the power supply circuit, the voltage reduction unit includes a first Schottky diode.

[0018] Further, in the power supply circuit, the operating voltage of the second power unit is lower than the operating voltage of the first power unit;

[0019] The first voltage conversion module includes a second boost unit;

[0020] The output end of the power supply module is connected to the input end of the first power consumption unit through the second boost unit.

[0021] Furthermore, in the power supply circuit, the second boost unit includes a Schottky diode and a second inductor.

[0022] Furthermore, the power supply circuit also includes a second voltage conversion module;

[0023] The output end of the power supply module is connected to the input end of the second power consumption unit through the second voltage conversion module.

[0024] Further, in the power supply circuit, the operating voltage of the second power unit is greater than the operating voltage of the first power unit;

[0025] The first voltage conversion module includes a step-down unit;

[0026] The output end of the power supply module is connected to the input end of the first power consumption unit through the step-down unit;

[0027] The second voltage conversion module includes a second boost unit;

[0028] The output end of the power supply module is connected to the input end of the second power consumption unit through the second boost unit.

[0029] Further, in the power supply circuit, the voltage reduction unit includes a first Schottky diode;

[0030] The second boost unit includes a second Schottky diode and a second inductor.

[0031] Compared with the prior art, the utility model has the following beneficial effects:

[0032] The utility model provides a power supply circuit, which sets a first voltage conversion module so that when the working voltages of the first power unit and the second power unit are different, the power supply module can directly provide the second power unit with a suitable working voltage on the one hand, and can provide the first power unit with a suitable working voltage through the first voltage conversion module on the other hand. This not only ensures that each power unit can operate at a suitable working voltage, thereby avoiding performance degradation or failure due to voltage mismatch, but also effectively reduces the power consumption of the entire circuit, reduces unnecessary energy loss, improves the energy efficiency of the circuit, and extends the service life of the entire circuit.

[0033] The present invention has other characteristics and advantages, which will be apparent from the accompanying drawings and subsequent specific embodiments incorporated herein, or will be described in detail in the accompanying drawings and subsequent specific embodiments incorporated herein, which together are used to explain the specific principles of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0035] Figure 1 This is one of the structural schematic diagrams of a power supply circuit provided by an embodiment of the utility model;

[0036] Figure 2 This is the second structural schematic diagram of a power supply circuit provided by an embodiment of the utility model;

[0037] Figure 3This is a schematic diagram of the circuit principle of the power supply module provided in the embodiment of the utility model;

[0038] Figure 4 This is one of the circuit principle schematic diagrams of a power supply circuit provided by an embodiment of the utility model;

[0039] Figure 5 This is the second circuit principle schematic diagram of a power supply circuit provided by an embodiment of the utility model;

[0040] Figure 6 This is a third structural schematic diagram of a power supply circuit provided by an embodiment of the utility model;

[0041] Figure 7 This is the third circuit principle schematic diagram of a power supply circuit provided by an embodiment of the utility model.

[0042] Reference numerals:

[0043] Power supply module 1, power consumption unit group 2, conversion module 3, second voltage conversion module 4;

[0044] A first power-consuming unit 21 and a second power-consuming unit 22 . DETAILED DESCRIPTION

[0045] In order to explain in detail the possible application scenarios, technical principles, specific schemes that can be implemented, and the purposes and effects that can be achieved, the following is a detailed description of the specific embodiments listed in conjunction with the accompanying drawings. The embodiments described herein are only used to more clearly illustrate the technical solutions of the present application, and are therefore only used as examples, and cannot be used to limit the scope of protection of the present application.

[0046] Reference to "embodiment" herein means that the specific features, structures or characteristics described in conjunction with the embodiment may be included in at least one embodiment of the present application. The term "embodiment" appearing in various places in the specification does not necessarily refer to the same embodiment, nor does it particularly limit its independence or association with other embodiments. In principle, in the present application, as long as there is no technical contradiction or conflict, the various technical features mentioned in the embodiments can be combined in any way to form a corresponding implementable technical solution.

[0047] Unless otherwise defined, the technical terms used in this document have the same meanings as those generally understood by those skilled in the art to which this application belongs; the use of relevant terms in this document is only for describing specific embodiments and is not intended to limit this application.

[0048] In the description of this application, the term "and / or" is an expression used to describe the logical relationship between objects, indicating that three relationships may exist, for example, A and / or B, which means: A exists, B exists, and A and B exist at the same time. In addition, the character " / " in this article generally indicates that the objects before and after are in an "or" logical relationship.

[0049] In the present application, terms such as “first” and “second” are merely used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship of quantity, priority or sequence between these entities or operations.

[0050] Without further limitations, in this application, the words "include", "comprises", "has" or other similar expressions used in the sentences are intended to cover non-exclusive inclusion. These expressions do not exclude the presence of additional elements in the process, method or product including the elements, so that the process, method or product including a series of elements may include not only those limited elements, but also other elements not explicitly listed, or also include elements inherent to such process, method or product.

[0051] Similar to the understanding in the Examination Guidelines, in this application, expressions such as "greater than", "less than", "exceed" and the like are understood to exclude the number itself; expressions such as "above", "below", "within" and the like are understood to include the number itself. In addition, in the description of the embodiments of this application, "multiple" means more than two (including two), and similar expressions related to "multiple" are also understood in this way, such as "multiple groups", "multiple times", etc., unless otherwise clearly and specifically limited.

[0052] In the description of the embodiments of the present application, space-related expressions used, such as "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "vertical", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicate the orientation or position relationship based on the orientation or position relationship shown in the specific embodiments or drawings, and are only for the convenience of describing the specific embodiments of the present application or facilitating the reader's understanding, and do not indicate or imply that the referred device or component must have a specific position, a specific orientation, or be constructed or operated in a specific orientation, and therefore cannot be understood as a limitation on the embodiments of the present application.

[0053] Unless otherwise expressly specified or limited, in the description of the embodiments of the present application, the terms such as "install", "connect", "connect", "fix", "set", etc. used should be understood in a broad sense. For example, the "connection" can be a fixed connection, a detachable connection, or an integrated setting; it can be a mechanical connection, an electrical connection, or a communication connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium; it can be the internal connection of two elements or the interaction relationship between two elements. For technicians in the technical field to which the present application belongs, the specific meanings of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0054] Embodiment 1

[0055] In view of the above-mentioned defects in the prior art, the applicant, based on many years of rich practical experience and professional knowledge in design and manufacturing in this field, and in conjunction with the application of theory, actively conducts research and innovation in the hope of creating a technology that can solve the defects in the prior art. After continuous research and design, and after repeated trial production and improvement, the present utility model with real practical value was finally created.

[0056] Please refer to Figure 1 The embodiment of the utility model provides a power supply circuit, which aims to solve the problems of high circuit power consumption and affected working performance caused by different working voltages of different power consumption units in the prior art. The power supply circuit includes a power supply module 1 and a power consumption unit group 2, wherein the power consumption unit group 2 includes at least one first power consumption unit 21 and at least one second power consumption unit 22, and the working voltages of the first power consumption unit 21 and the second power consumption unit 22 are different; this embodiment is illustrated and described by taking a first power consumption unit 21 and a second power consumption unit 22 as an example.

[0057] In the circuit design, the output end of the power supply module 1 is connected to the input end of the first power unit 21 through a specially designed first voltage conversion module 3. At the same time, the output end of the power supply module 1 is also directly connected to the input end of the second power unit 22 without any voltage conversion.

[0058] This circuit design has significant advantages. When the power supply module 1 starts working, it can directly provide the second power unit 22 with the required working voltage, ensuring that the power unit can operate normally and efficiently. For the first power unit 21 whose working voltage does not match the output voltage of the power supply module, the power supply module 1 performs voltage conversion through the first voltage conversion module 3 to meet its specific voltage requirements. This conversion can be either step-up or step-down, depending on the working voltage required by the first power unit 21.

[0059] By introducing the first voltage conversion module 3, the utility model not only solves the problem of different working voltages of different power consumption units, but also significantly reduces the power consumption of the entire circuit. Since each power consumption unit can operate at a suitable working voltage, energy waste and performance degradation caused by voltage mismatch are avoided, thereby improving the energy efficiency and stability of the circuit.

[0060] In addition, the design also extends the service life of the circuit and provides a stable and reliable power supply solution for various electronic devices. Since unnecessary energy loss and heat generation are reduced, the components in the circuit are subjected to less thermal stress, thereby reducing the risk of component damage and failure.

[0061] Please refer again Figure 1 , and combined with reference Figure 2 , in this embodiment, the power supply module 1 includes a battery BAT and a first boost unit;

[0062] The input end of the first boost unit is connected to the battery BAT, and the output end of the first boost unit serves as the output end of the power supply module 1 .

[0063] It should be noted that the power supply module 1 is composed of a battery BAT and a first boost unit, which together provide a stable and reliable power supply to the power unit group 2 .

[0064] First, the battery BAT serves as the energy source of the entire circuit, providing the circuit with raw power. Its output end is directly connected to the input end of the first boost unit to ensure stable power transmission.

[0065] Secondly, as an important component of the power supply module 1, the first boost unit is responsible for boosting the voltage provided by the battery BAT. Through the internal boost circuit and components, the first boost unit can boost the lower voltage output by the battery BAT to a suitable level to facilitate meeting the voltage requirements of each power unit in the power unit group 2. For example, the voltage output by the battery BAT is 1.5V, which can be increased to 2.2V, 2.3V or 2.5V after being boosted by the first boost unit.

[0066] In particular, the output end of the first boost unit directly serves as the output end of the power supply module 1 and is connected to the power unit group 2. This means that the voltage boosted by the first boost unit can be directly supplied to each power unit in the power unit group 2 for use.

[0067] Among them, for the second power consumption unit 22 whose working voltage matches the output voltage of the power supply module 1, it can directly obtain the required working voltage from the output end of the power supply module 1 without any additional voltage conversion. For the first power consumption unit 21 with specific requirements for working voltage, the voltage can be further converted through the first voltage conversion module 3 to meet its specific voltage requirements.

[0068] Please refer again Figure 2 , and combined with reference Figure 3 , the first boost unit includes an input filter, a first inductor L1, a DCDC converter U1 and an output filter connected in sequence;

[0069] The input end of the input filter is connected to the battery BAT, and the output end of the output filter serves as the output end of the first boost unit.

[0070] It should be noted that the design of the power supply module 1 in this embodiment is more specific and in-depth. In particular, the structure and component selection of the first boost unit are described in detail to ensure that it can work stably and efficiently. The first boost unit is composed of multiple key components, which work together to achieve the voltage boost function.

[0071] First, the input filter is placed at the front end of the first boost unit, which is directly connected to the positive and negative electrodes of the battery BAT. Figure 3 As shown, the input filter may be composed of a first polar capacitor C1 and a first non-polar capacitor C2 connected in parallel between the positive electrode and the negative electrode of the battery BAT. In this configuration, the first polar capacitor C1 helps to filter out the low-frequency components from the battery BAT, and the first non-polar capacitor C2 helps to filter out the high-frequency components from the battery BAT, thereby ensuring the stability and purity of the input voltage.

[0072] Next, the first inductor L1 is introduced into the circuit. Its main function is to stabilize the current input to the DCDC converter U1. By slowing down the speed of current change, the first inductor L1 can avoid the instantaneous increase or decrease of the current in the loop, thereby protecting the DCDC converter U1 from the impact of current shock. This not only helps to improve the working efficiency of the DCDC converter U1, but also prolongs its service life.

[0073] The DCDC converter U1 is the core component of the entire first boost unit. It is responsible for boosting the voltage provided by the battery BAT to meet the voltage requirements of the power unit group 2. Through the internal boost circuit and control logic, the DCDC converter U1 can efficiently convert the input low voltage into a high voltage output.

[0074] Finally, the output filter is placed at the output of the DCDC converter U1 to filter out the noise and ripple that may be generated during the boost process. Figure 3 As shown, the output filter can be composed of a second polarized capacitor C3 and a second non-polarized capacitor C4, which are also connected in parallel between the positive electrode and the negative electrode of the battery BAT. This filtering structure can ensure the stability and purity of the output voltage and provide high-quality power supply for the power unit group 2.

[0075] For the different operating voltages between the first power unit 21 and the second power unit 22, this embodiment provides a flexible design of the first voltage conversion module 3. The module can reduce or increase the voltage according to the operating voltage requirements of the power unit, ensuring that each power unit can operate at a suitable operating voltage.

[0076] Please refer to Figure 4 In the first embodiment, when the working voltage of the second power unit 22 is greater than the working voltage of the first power unit 21, the first voltage conversion module 3 mainly plays a role of voltage reduction. In order to achieve this function, the first voltage conversion module 3 includes a voltage reduction unit. The output end of the power supply module 1 is connected to the input end of the first power unit 21 through the voltage reduction unit, thereby ensuring that the working voltage received by the first power unit 21 is lower than the output voltage of the power supply module 1. For example, if the output voltage of the power supply module 1 is 2.5V, the working voltage of the second power unit 22 is also 2.5V, and the voltage output from the output end of the power supply module 1 to the first power unit 21 after passing through the voltage reduction unit is 2.2V, which meets the working voltage requirement of the first power unit 21.

[0077] Exemplarily, the voltage reduction unit may include a first Schottky diode D1 , and the voltage reduction is achieved by utilizing the characteristics of the first Schottky diode D1 .

[0078] It should be noted that the reason why the Schottky diode D1 can be used as a step-down unit is mainly due to its special electrical characteristics. The Schottky diode has a lower forward conduction voltage (VF), which means that when the same current passes through, the voltage drop generated by the Schottky diode is smaller than that of other types of diodes. Therefore, in the circuit, the Schottky diode can effectively reduce the voltage and play a role in reducing the voltage.

[0079] In addition, the low power consumption of Schottky diodes also makes them advantageous in step-down applications. Traditional reverse protection components will generate large power losses when working, while Schottky diodes can significantly reduce power losses due to their low VF properties, thereby improving the efficiency of the entire circuit.

[0080] Please refer to Figure 5In the second embodiment, when the working voltage of the second power unit 22 is lower than the working voltage of the first power unit 21, the first voltage conversion module 3 mainly plays a role of boosting. In order to achieve the voltage increase, the first voltage conversion module 3 includes a second boosting unit. The output end of the power supply module 1 is connected to the input end of the first power unit 21 through the second boosting unit to ensure that the working voltage received by the first power unit 21 is higher than the output voltage of the power supply module 1. For example, if the output voltage of the power supply module 1 is 2.2V, the working voltage of the second power unit 22 is also 2.2V, and the voltage output from the output end of the power supply module 1 to the first power unit 21 after passing through the second boosting unit is 2.5V, which meets the working voltage requirement of the first power unit 21.

[0081] Exemplarily, the second boost unit may include a second Schottky diode D2 and a second inductor L2 . The combination of these components can effectively boost the voltage to meet the voltage requirement of the first power-consuming unit 21 .

[0082] It should be noted that the reason why the second Schottky diode D2 and the second inductor L2 can form a boost unit is mainly based on their cooperative working mechanism in the circuit and their respective electrical characteristics.

[0083] First, the inductor (such as the second inductor L2) plays the role of storing electrical energy in the circuit. When the input voltage is applied to the inductor, the inductor starts to charge and stores the electrical energy as magnetic field energy. This process is the basis of the operation of the boost unit.

[0084] Secondly, the Schottky diode (such as the second Schottky diode D2) plays a unidirectional conductive role in the circuit, allowing current to flow in only one direction. In the boost unit, the role of the Schottky diode is to prevent the energy released by the inductor from flowing in the reverse direction, ensuring that the energy can be effectively transmitted to the output end.

[0085] When the inductor is fully charged, if the input voltage stops being applied, the inductor will begin to release the stored energy. At this time, the Schottky diode allows the energy released by the inductor to flow through it to the output end, and will not flow back to the input end. In this way, the energy released by the inductor is transferred to the output end, thereby achieving a voltage increase.

[0086] In addition, Schottky diodes also have the characteristics of fast recovery, that is, the reverse recovery time is extremely short, which helps to reduce energy loss and improve circuit efficiency. At the same time, its forward conduction voltage drop is small, which can also reduce the loss during energy transmission.

[0087] Therefore, through the coordinated work of the inductor and the Schottky diode, the second Schottky diode D2 and the second inductor L2 can form an effective boost unit to increase the voltage and meet the working voltage requirements of a specific power unit. This combination has a wide range of applications in boost circuits and can provide stable and efficient voltage output.

[0088] Please refer to Figure 6-7 In the third embodiment, the design of the power supply circuit is more complex and comprehensive, and the second voltage conversion module 4 is particularly introduced to meet the specific working voltage requirements of the second power unit 22. This design is suitable for the case where the working voltage of the second power unit 22 is both greater than the working voltage of the first power unit 21 and higher than the voltage directly output by the power supply module 1.

[0089] In this embodiment, the output end of the power supply module 1 is not only connected to the input end of the first power unit 21 through the first voltage conversion module 3, but also connected to the input end of the second power unit 22 through the second voltage conversion module 4. This double conversion design ensures that each power unit can receive a voltage suitable for its operation.

[0090] When the operating voltage of the second power unit 22 is greater than the operating voltage of the first power unit 21, the first voltage conversion module 3 mainly plays a role of voltage reduction. It includes a voltage reduction unit, which includes a first Schottky diode D1, which can effectively reduce the output voltage of the power supply module 1 to meet the voltage requirement of the first power unit 21.

[0091] Meanwhile, the second voltage conversion module 4 mainly plays a role of boosting voltage, and comprises a second boosting unit, which is composed of a second Schottky diode D2 and a second inductor L2, and can significantly increase the output voltage of the power supply module 1 to meet the higher working voltage requirement of the second power consumption unit 22.

[0092] Through this design, the power supply circuit can provide stable and efficient power supply to power consumption units with different working voltage requirements at the same time. The first power consumption unit 21 receives the appropriate low voltage through the step-down unit, while the second power consumption unit 22 receives the required high voltage through the second step-up unit. This flexible voltage conversion method not only improves the energy efficiency of the circuit, but also ensures that each power consumption unit can operate at the appropriate working voltage.

[0093] Although the terms such as power supply module, power unit, conversion module, boost unit, and buck unit are frequently used in this application, the possibility of using other terms is not excluded. These terms are used only to more conveniently describe and explain the essence of the present invention; interpreting them as any additional restrictions is contrary to the spirit of the present invention.

[0094] The utility model provides a power supply circuit, which sets a first voltage conversion module so that when the working voltages of the first power unit and the second power unit are different, the power supply module can directly provide the second power unit with a suitable working voltage on the one hand, and can provide the first power unit with a suitable working voltage through the first voltage conversion module on the other hand. This not only ensures that each power unit can operate at a suitable working voltage, thereby avoiding performance degradation or failure due to voltage mismatch, but also effectively reduces the power consumption of the entire circuit, reduces unnecessary energy loss, improves the energy efficiency of the circuit, and extends the service life of the entire circuit.

[0095] Finally, it should be noted that although the above embodiments have been described in the specification and drawings of this application, this does not limit the scope of patent protection of this application. All technical solutions generated by replacing or modifying equivalent structures or equivalent processes based on the essential concept of this application using the contents recorded in the specification and drawings of this application, as well as directly or indirectly implementing the technical solutions of the above embodiments in other related technical fields, are included in the scope of patent protection of this application.

Claims

1. A power supply circuit, characterized in that: Comprising a power supply module (1) and an electric unit group (2), the electric unit group (2) comprising at least one first electric unit (21) and at least one second electric unit (22), the first electric unit (21) and the second electric unit (22) having different operating voltages; The output end of the power supply module (1) is connected to the input end of the first power consumption unit (21) via a first voltage conversion module (3), and the output end of the power supply module (1) is connected to the input end of the second power consumption unit (22).

2. The power supply circuit according to claim 1, characterized in that: The power supply module (1) comprises a battery BAT and a first boost unit; The input end of the first boost unit is connected to the battery BAT, and the output end of the first boost unit serves as the output end of the power supply module (1).

3. The power supply circuit according to claim 2, characterized in that: The first boost unit includes an input filter, a first inductor L1, a DCDC converter U1 and an output filter connected in sequence; The input end of the input filter is connected to the battery BAT, and the output end of the output filter serves as the output end of the first boost unit.

4. The power supply circuit according to claim 1, characterized in that: The operating voltage of the second power consumption unit (22) is greater than the operating voltage of the first power consumption unit (21); The first voltage conversion module (3) comprises a voltage reduction unit; The output end of the power supply module (1) is connected to the input end of the first power consumption unit (21) via the voltage reduction unit.

5. The power supply circuit according to claim 4, characterized in that: The voltage-reducing unit includes a first Schottky diode D1 .

6. The power supply circuit according to claim 1, characterized in that: The operating voltage of the second power consumption unit (22) is lower than the operating voltage of the first power consumption unit (21); The first voltage conversion module (3) comprises a second boost unit; The output end of the power supply module (1) is connected to the input end of the first power consumption unit (21) via the second boost unit.

7. The power supply circuit according to claim 6, characterized in that: The second boost unit includes a second Schottky diode D2 and a second inductor L2.

8. The power supply circuit according to claim 1, characterized in that: It also includes a second voltage conversion module (4); The output end of the power supply module (1) is connected to the input end of the second power consumption unit (22) via the second voltage conversion module (4).

9. The power supply circuit according to claim 8, characterized in that: The operating voltage of the second power consumption unit (22) is greater than the operating voltage of the first power consumption unit (21); The first voltage conversion module (3) comprises a voltage reduction unit; The output end of the power supply module (1) is connected to the input end of the first power consumption unit (21) via the voltage reduction unit; The second voltage conversion module (4) comprises a second boost unit; The output end of the power supply module (1) is connected to the input end of the second power consumption unit (22) via the second boost unit.

10. The power supply circuit according to claim 9, characterized in that: The step-down unit includes a first Schottky diode D1; The second boost unit includes a second Schottky diode D2 and a second inductor L2.

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