Circuit for stabilizing power consumption fluctuation of equipment

Abstract

The utility model discloses a circuit for stabilizing power consumption fluctuation of equipment. The circuit comprises an energy storage module, a first switch module, a second switch module, a first resistor and a third switch module, one end of the first resistor is connected with the power input end of the first switch module and the power input end of the third switch module and used for being connected with a power source. The other end of the first resistor is connected with the power output end and the control end of the first switch module, the positive electrode of the energy storage module, the power input end of the second switch module and the control end of the third switch module. The control end of the second switch module is used for receiving a mode control signal; the power output end of the second switch module and the power output end of the third switch module are used for outputting power. When the power supply of the external power supply is greater than the power consumption demand of the equipment, the energy storage module stores redundant electric energy; and when entering the high-energy-consumption mode, the energy storage module and an external power supply supply power to the equipment together.

Description

Technical Field

[0001] This utility model relates to the field of electronic circuit technology, and in particular to a circuit for smoothing power consumption fluctuations in devices. Background Technology

[0002] Existing electronic devices typically carry multiple functional modules, and the power consumption of different functional modules often varies greatly when they are working, resulting in significant differences and fluctuations in the overall power consumption requirements of electronic devices under different operating conditions.

[0003] When equipment uses external power, fluctuations in power consumption will affect power supply selection and overall cost. For example, if the power supply capacity is matched to the maximum power consumption demand, there will be excess power most of the time, increasing equipment costs and limiting equipment usage. If the power supply is matched to the normal power consumption demand, there is a risk of insufficient power supply capacity when high-power modules are operating. Utility Model Content

[0004] The technical problem to be solved by this utility model is to provide a circuit for smoothing power consumption fluctuations in equipment, thereby reducing the external power supply requirements at the equipment level and reducing equipment costs.

[0005] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is as follows:

[0006] A circuit for smoothing power consumption fluctuations in a device includes an energy storage module, a first switching module, a second switching module, a first resistor, and a third switching module. One end of the first resistor is connected to the power input terminals of both the first and third switching modules and is used to connect to a power source. The other end of the first resistor is connected to the power output terminal and control terminal of the first switching module, the positive terminal of the energy storage module, the power input terminal of the second switching module, and the control terminal of the third switching module. The control terminal of the second switching module is used to receive a mode control signal. The power output terminals of the second and third switching modules are used to output power.

[0007] Furthermore, the first switching module includes a first MOSFET, a second MOSFET, and a second resistor; the source of the first MOSFET is connected to one end of the first resistor, the drain of the first MOSFET is connected to one end of the second resistor, and the gate of the first MOSFET is connected to the drain of the second MOSFET; the gate of the second MOSFET and the other end of the second resistor are respectively connected to the other end of the first resistor, and the source of the second MOSFET is grounded.

[0008] Furthermore, the first switching module also includes a third resistor and a fourth resistor; one end of the third resistor is connected to the other end of the second resistor, and the other end of the third resistor is connected to the gate of the second MOS transistor and one end of the fourth resistor respectively; the other end of the fourth resistor is connected to the source of the second MOS transistor.

[0009] Furthermore, the second switching module includes a third MOSFET and a fourth MOSFET; the source of the third MOSFET is connected to the other end of the first resistor, the drain of the third MOSFET is used for power output, and the gate of the third MOSFET is connected to the drain of the fourth MOSFET; the source of the fourth MOSFET is grounded, and the gate of the fourth MOSFET is used to receive mode control signals.

[0010] Furthermore, the third switching module includes a fifth MOSFET and a sixth MOSFET; the source of the fifth MOSFET is used to connect to the power supply, the drain of the fifth MOSFET is used to output power, and the gate of the fifth MOSFET is connected to the drain of the sixth MOSFET; the gate of the sixth MOSFET is connected to the other end of the first resistor, and the source of the sixth MOSFET is grounded.

[0011] Furthermore, the third switching module also includes a fifth resistor and a sixth resistor; one end of the fifth resistor is connected to the other end of the first resistor, and the other end of the fifth resistor is connected to the gate of the sixth MOS transistor and one end of the sixth resistor, respectively; the other end of the sixth resistor is connected to the source of the sixth MOS transistor.

[0012] Furthermore, the third switching module also includes a stabilizing unit; the input terminal of the stabilizing unit is connected to the source of the fifth MOS transistor, and the output terminal of the stabilizing unit is connected to the gate of the fifth MOS transistor.

[0013] Furthermore, it also includes a current constraint module; the input terminal of the current constraint module is used to connect to the power supply, and the output terminal of the current constraint module is connected to one end of the first resistor and the power input terminal of the first switch module, respectively.

[0014] Furthermore, the current constraint module includes at least one diode; the positive terminal of the diode is connected to a power supply, and the negative terminal is connected to one end of the first resistor and the power input terminal of the first switching module, respectively.

[0015] Furthermore, the energy storage module includes a capacitor; the positive terminal of the capacitor is connected to the other end of the first resistor, and the negative terminal of the capacitor is grounded.

[0016] The beneficial effects of this utility model are as follows: By setting up an energy storage module, when the external power supply exceeds the device's power consumption requirements, the energy storage module stores the excess electrical energy; when the device enters a high-energy-consumption mode, after receiving the control signal to activate the high-energy-consumption mode through the second switch module, the energy storage module supplies power to the device together with the external power supply through the second switch module, thereby meeting the device's high-energy-consumption requirements; at the same time, a first switch module is set up, and the control terminal of the first switch module is connected to the positive terminal of the energy storage module, that is, the first switch module is controlled based on the energy storage state of the energy storage module, and by conducting the first switch module, the first switch module constitutes a second charging path for the energy storage module, thereby improving the charging efficiency of the energy storage module. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of a circuit for smoothing power consumption fluctuations in a device, as described in an embodiment of this utility model.

[0018] Figure 2 This is a schematic diagram of the circuit used to smooth out power consumption fluctuations in a device according to an embodiment of the present invention.

[0019] Label Explanation:

[0020] 1. Energy storage module; 2. First switch module; 3. Second switch module; 4. Third switch module;

[0021] Q1, first MOSFET; Q2, second MOSFET; Q3, third MOSFET; Q4, fourth MOSFET; Q5, fifth MOSFET; Q6, sixth MOSFET; R1, first resistor; R2, second resistor; R3, third resistor; R4, fourth resistor; R5, fifth resistor; R6, sixth resistor; D1 / D2, diodes; C1, capacitor. Detailed Implementation

[0022] To explain in detail the technical content, objectives, and effects of this utility model, the following description is provided in conjunction with the embodiments and accompanying drawings.

[0023] A circuit for smoothing power consumption fluctuations in a device includes an energy storage module, a first switching module, a second switching module, a first resistor, and a third switching module. One end of the first resistor is connected to the power input terminals of both the first and third switching modules and is used to connect to a power source. The other end of the first resistor is connected to the power output terminal and control terminal of the first switching module, the positive terminal of the energy storage module, the power input terminal of the second switching module, and the control terminal of the third switching module. The control terminal of the second switching module is used to receive a mode control signal. The power output terminals of the second and third switching modules are used to output power.

[0024] As described above, the beneficial effects of this utility model are as follows: By setting an energy storage module, when the external power supply exceeds the device's power consumption requirements, the energy storage module stores the excess electrical energy; when the device enters a high-energy-consumption mode, after receiving the control signal to activate the high-energy-consumption mode through the second switch module, the energy storage module supplies power to the device together with the external power supply through the second switch module, thereby meeting the device's high-energy-consumption requirements; simultaneously, a first switch module is set, and the control terminal of the first switch module is connected to the positive terminal of the energy storage module, that is, the first switch module is controlled based on the energy storage state of the energy storage module, and by conducting the first switch module, the first switch module constitutes the second charging path of the energy storage module, thereby improving the charging efficiency of the energy storage module.

[0025] Furthermore, the first switching module includes a first MOSFET, a second MOSFET, and a second resistor; the source of the first MOSFET is connected to one end of the first resistor, the drain of the first MOSFET is connected to one end of the second resistor, and the gate of the first MOSFET is connected to the drain of the second MOSFET; the gate of the second MOSFET and the other end of the second resistor are respectively connected to the other end of the first resistor, and the source of the second MOSFET is grounded.

[0026] As described above, a first switching module is formed by a first MOSFET, a second MOSFET, and a second resistor. Based on the control of the first MOSFET and the second MOSFET, when the first MOSFET and the second MOSFET are turned on, the first MOSFET and the second resistor form a second charging path for the energy storage module, thereby improving the charging efficiency of the energy storage module.

[0027] Furthermore, the first switching module also includes a third resistor and a fourth resistor; one end of the third resistor is connected to the other end of the second resistor, and the other end of the third resistor is connected to the gate of the second MOS transistor and one end of the fourth resistor respectively; the other end of the fourth resistor is connected to the source of the second MOS transistor.

[0028] As described above, by setting a third resistor and a fourth resistor, and by adjusting the resistance values ​​of the third resistor and the fourth resistor, the conduction threshold of the first switch module can be adjusted to meet the design requirements of different charging efficiencies.

[0029] Furthermore, the second switching module includes a third MOSFET and a fourth MOSFET; the source of the third MOSFET is connected to the other end of the first resistor, the drain of the third MOSFET is used for power output, and the gate of the third MOSFET is connected to the drain of the fourth MOSFET; the source of the fourth MOSFET is grounded, and the gate of the fourth MOSFET is used to receive mode control signals.

[0030] As described above, the second switching module is composed of the third MOSFET and the fourth MOSFET. Based on the control of the third MOSFET and the fourth MOSFET, the second switching module can be effectively controlled to turn on or off.

[0031] Furthermore, the third switching module includes a fifth MOSFET and a sixth MOSFET; the source of the fifth MOSFET is used to connect to the power supply, the drain of the fifth MOSFET is used to output power, and the gate of the fifth MOSFET is connected to the drain of the sixth MOSFET; the gate of the sixth MOSFET is connected to the other end of the first resistor, and the source of the sixth MOSFET is grounded.

[0032] As described above, the third switching module is formed by the fifth MOSFET and the sixth MOSFET. The gate of the sixth MOSFET is connected to the positive terminal of the energy storage module, so that the energy storage module can turn on the sixth MOSFET and the fifth MOSFET after it is fully charged, thereby supplying power to the device.

[0033] Furthermore, the third switching module also includes a fifth resistor and a sixth resistor; one end of the fifth resistor is connected to the other end of the first resistor, and the other end of the fifth resistor is connected to the gate of the sixth MOS transistor and one end of the sixth resistor, respectively; the other end of the sixth resistor is connected to the source of the sixth MOS transistor.

[0034] As described above, by setting the fifth and sixth resistors and adjusting their resistance values, the conduction threshold of the third switch module can be adjusted, thereby controlling the conduction time of the third switch module and adjusting the power-on time of the device.

[0035] Furthermore, the third switching module also includes a stabilizing unit; the input terminal of the stabilizing unit is connected to the source of the fifth MOS transistor, and the output terminal of the stabilizing unit is connected to the gate of the fifth MOS transistor.

[0036] As described above, by setting a stabilizing unit between the source and gate of the fifth MOSFET, such as a capacitor and a resistor, the resistor helps to improve the response speed of the MOSFET, and the capacitor helps to buffer the voltage changes of the MOSFET, making the MOSFET work more stably.

[0037] Furthermore, it also includes a current constraint module; the input terminal of the current constraint module is used to connect to the power supply, and the output terminal of the current constraint module is connected to one end of the first resistor and the power input terminal of the first switch module, respectively.

[0038] As described above, by setting the current constraint module, the power input current path can be constrained. At the same time, a voltage difference is formed between the energy storage module and the external power supply after the energy storage module is fully charged. Thus, when the second switch module is turned on, if the current demand is greater than the capacity of the external power supply, the supply voltage will drop. At this time, the energy storage module discharges to fill the current gap and maintain the voltage. If the current demand is less than the capacity of the external power supply, the supply voltage will be boosted by the external power supply. At this time, the external power supply can also charge the energy storage module in reverse through the second switch module.

[0039] Furthermore, the current constraint module includes at least one diode; the positive terminal of the diode is connected to a power supply, and the negative terminal is connected to one end of the first resistor and the power input terminal of the first switching module, respectively.

[0040] As can be seen from the above description, by setting up a current constraint module with diodes, the current path can be effectively constrained.

[0041] Furthermore, the energy storage module includes a capacitor; the positive terminal of the capacitor is connected to the other end of the first resistor, and the negative terminal of the capacitor is grounded.

[0042] As described above, a capacitor is used as an energy storage module, and the energy storage and discharge functions are realized based on the charging and discharging characteristics of the capacitor.

[0043] The circuit for smoothing power consumption fluctuations in devices provided by this utility model can be applied to electronic devices with multi-functional modules. By smoothing power consumption fluctuations and reducing peaks and valleys, the power supply specifications of the device are reduced, thereby reducing the cost of the device power supply module. The following is a detailed description of the implementation method:

[0044] Example 1

[0045] Please refer to Figure 1 as well as Figure 2A circuit for smoothing power consumption fluctuations in a device includes an energy storage module 1, a first switch module 2, a second switch module 3, a first resistor R1, and a third switch module 4. One end of the first resistor R1 is connected to the power input terminals of the first switch module 2 and the third switch module 4, respectively, and is used to connect to a power supply (+VCC_IN). The other end of the first resistor R1 (+VCC_CAP) is connected to the power output terminal and control terminal of the first switch module 2, the positive terminal of the energy storage module 1, the power input terminal of the second switch module 3, and the control terminal of the third switch module 4, respectively. The control terminal of the second switch module 3 is used to receive a mode control signal (CAP_EN). The mode control signal can be issued by a main control circuit. For example, when the circuit is applied to an electronic device, the mode control signal can be issued to the control terminal of the second switch module 3 through the internal chip of the electronic device. The power output terminals of the second switch module 3 and the third switch module 4 are used to output power (+VCC_SYS). The first switch module 2, the second switch module 3, and the third switch module 4 can be selected from different types of switches according to requirements. For example, they can be devices with switching functions, device combinations, or switch chips. The energy storage module 1 includes a capacitor C1, for example, a farad capacitor. The positive terminal of the capacitor C1 is connected to the other end of the first resistor R1, and the negative terminal of the capacitor C1 is grounded. That is, the capacitor C1 is used as a second power source to smooth out the power consumption fluctuations of the device and reduce the external power supply requirements at the device level. The function of the energy storage module 1 is realized by selecting different models of capacitor C1 according to the needs of the scenario and the capacity requirements.

[0046] Please refer to Figure 2 In an optional embodiment, the first switching module 2 includes a first MOSFET Q1, a second MOSFET Q2, a second resistor R2, a third resistor R3, and a fourth resistor R4; the source of the first MOSFET Q1 is connected to one end of the first resistor R1, the drain of the first MOSFET Q1 is connected to one end of the second resistor R2, and the gate of the first MOSFET Q1 is connected to the drain of the second MOSFET Q2; the gate of the second MOSFET Q2 and the other end of the second resistor R2 are respectively connected to the other end of the first resistor R1, and the source of the second MOSFET Q2 is grounded; one end of the third resistor R3 is connected to the other end of the second resistor R2, and the other end of the third resistor R3 is respectively connected to the gate of the second MOSFET Q2 and one end of the fourth resistor R4; the other end of the fourth resistor R4 is connected to the source of the second MOSFET Q2.

[0047] The second switching module 3 includes a third MOSFET Q3 and a fourth MOSFET Q4; the source of the third MOSFET Q3 is connected to the other end of the first resistor R1, the drain of the third MOSFET Q3 is used for output power supply (+VCC_SYS), and the gate of the third MOSFET Q3 is connected to the drain of the fourth MOSFET Q4; the source of the fourth MOSFET Q4 is grounded, and the gate of the fourth MOSFET Q4 is used to receive the mode control signal.

[0048] The third switching module 4 includes a fifth MOSFET Q5, a sixth MOSFET Q6, a fifth resistor R5, and a sixth resistor R6. The source of the fifth MOSFET Q5 is connected to the power supply, and the drain of the fifth MOSFET Q5 is used to output power (+VCC_SYS). The gate of the fifth MOSFET Q5 is connected to the drain of the sixth MOSFET Q6. The gate of the sixth MOSFET Q6 is connected to the other end of the first resistor R1, and the source of the sixth MOSFET Q6 is grounded. One end of the fifth resistor R5 is connected to the other end of the first resistor R1, and the other end of the fifth resistor R5 is connected to the gate of the sixth MOSFET Q6 and one end of the sixth resistor R6. The other end of the sixth resistor R6 is connected to the source of the sixth MOSFET Q6.

[0049] The third switching module 4 also includes a stabilizing unit; the input terminal of the stabilizing unit is connected to the source of the fifth MOSFET Q5, and the output terminal of the stabilizing unit is connected to the gate of the fifth MOSFET Q5. Figure 2 As shown, the stabilizing unit consists of a capacitor and two resistors connected in parallel, positioned between the source and gate of the fifth MOSFET Q5. Similarly, the first switching module 2 and the second switching module 3 also have stabilizing units, positioned between the source and gate of the first MOSFET Q1 and between the source and gate of the third MOSFET Q3.

[0050] It also includes a current constraint module. The input terminal of the current constraint module is connected to the power supply, and the output terminal of the current constraint module is connected to one end of the first resistor R1 and the power input terminal of the first switch module 2, respectively. Figure 2 As shown, the current constraint module includes two diodes (D1 & D2) connected in parallel; the positive terminal of each diode D1 / D2 is connected to the power supply (+VCC_IN), and the negative terminal is connected to one end of the first resistor R1 and the power input terminal of the first switch module 2, respectively.

[0051] The main operating steps of the above circuit include powering on the device, recharging the high-energy-consuming module, and powering off the device. The circuit principle and control process are explained below for these steps:

[0052] (1) Powering on the device: When the device is powered on, the external power supply (+VCC_IN) supplies power to the capacitor C1 through the diode (D1&D2) and the first resistor R1. The first resistor R1 is used to limit the charging current of the capacitor C1. At this time, all current is used for charging and storing energy in the capacitor C1, and the device is not powered on. According to the characteristics of the capacitor C1, the current flowing through the first resistor R1 gradually decreases as +VCC_CAP increases. When +VCC_CAP increases to the conduction threshold formed by the third resistor R3 and the fourth resistor R4, the first MOS transistor Q1 is turned on, establishing a second charging path formed by the first MOS transistor Q1 and the second resistor R2 to charge the capacitor C1, thereby increasing the charging current of the capacitor C1 and shortening the charging time. That is, the first MOS, the third resistor R3 and the fourth resistor R4 are used to adjust the charging time of the capacitor C1.

[0053] When the voltage across capacitor C1 (+VCC_CAP) gradually rises to the conduction threshold formed by resistors R5 and R6, MOSFET Q5 turns on, connecting the input voltage to the device's power supply, and the device is officially powered on. In other words, MOSFET Q5, resistors R5 and R6 are used to adjust the device's power-on time, which can be adjusted according to the device's power-on time requirements and the current and power supply capacity in each state. At this time, a portion of the current from the external power supply (+VCC_IN) is used for the device's power-on needs.

[0054] (2) Power replenishment for high-energy-consuming modules: When the equipment is ready to start the high-energy-consuming modules, the third MOSFET Q3 is turned on via CAP_EN. When the third MOSFET Q3 is turned on, +VCC_CAP is slightly lower than +VCC_SYS (+VCC_CAP is turned on through diodes (D1 & D2) via +VCC_IN, so there is a certain diode voltage drop; while +VCC_SYS is turned on through the MOSFET via +VCC_IN, and the voltage drop is negligible. Therefore, there is a voltage drop between +VCC_CAP and +VCC_SYS caused by the diode). Power is supplied to capacitor C1 via the third MOSFET Q3. During the charging process (after the third MOSFET Q3 is turned on, capacitor C1 is essentially connected in parallel with the external power supply. Initially, since +VCC_CAP is slightly lower than +VCC_SYS, capacitor C1 will charge first. When the voltages are equal, they supply power to the device together. When the current demand exceeds the external power supply's capacity, the voltage drops, and capacitor C1 discharges to fill the gap and maintain the voltage. When the current demand is less than the external power supply's capacity, the voltage is boosted by the external power supply, which simultaneously charges capacitor C1), capacitor C1 is then connected in parallel with +VCC_SYS at the same voltage level, acting as a second power supply.

[0055] That is, when the high-energy-consuming module is working, the operating current is provided by the external power supply (+VCC_IN) and capacitor C1 together, releasing the electrical energy stored in capacitor C1 under normal conditions and reducing the current demand on +VCC_IN. When the high-energy-consuming module is turned off, the third MOSFET Q3 is closed by controlling CAP_EN, and capacitor C1 is disconnected from +VCC_SYS, so it can only be charged and stored through the first resistor R1 and the second resistor R2.

[0056] (3) Equipment power off: When the external power supply (+VCC_IN) is removed and the equipment is powered off: +VCC_CAP cannot flow to the external power supply (+VCC_IN) and the output power supply (+VCC_SYS).

[0057] The paths connected to +VCC_CAP include:

[0058] 1. The first resistor R1 is connected in parallel with the first MOSFET Q1 and the second resistor R2. The current flows to the diodes (D1 & D2) and then cuts off, so it cannot supply power (+VCC_IN) to the outside.

[0059] 2. The first resistor R1 is connected in parallel with the first MOSFET Q1 and the second resistor R2. When +VCC_CAP is higher than the conduction threshold of the second MOSFET Q2, it is then connected to the ground through the resistor and the second MOSFET Q2.

[0060] 3. It goes to ground via the third resistor R3 and the fourth resistor R4.

[0061] 4. The third MOSFET Q3 is cut off, and the body diode of the third MOSFET Q3 is reversed, so power cannot flow to the output (+VCC_SYS).

[0062] 4. The fourth MOSFET Q4 is cut off, so the current cannot flow to ground through the fourth MOSFET Q4.

[0063] 5. The circuit goes to ground via the fifth resistor R5 and the sixth resistor R6.

[0064] In summary, when the device is powered off, all available power paths flow to the ground terminal, either quickly or slowly, and cannot flow to the external power supply (+VCC_IN) or the output power supply (+VCC_SYS). Therefore, no power can be supplied to the device, and this will not affect the original power-off logic and operation of the device.

[0065] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent modifications made based on the content of this utility model specification and drawings, or direct or indirect applications in related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. A circuit for device power consumption fluctuation smoothening, characterized in that, The energy storage module, the first switch module, the second switch module, the first resistor and the third switch module are included. One end of the first resistor is connected with the power input end of the first switch module and the power input end of the third switch module respectively, and is used for connecting the power supply. The other end of the first resistor is connected with the power output end and the control end of the first switch module, the positive electrode of the energy storage module, the power input end of the second switch module and the control end of the third switch module respectively. The control end of the second switch module is used for receiving the mode control signal. The power output end of the second switch module and the power output end of the third switch module are used for outputting the power supply.

2. The circuit for device power fluctuation smoothening as claimed in claim 1 wherein, The first switch module includes the first MOS tube, the second MOS tube and the second resistor. The source of the first MOS tube is connected with one end of the first resistor, the drain of the first MOS tube is connected with one end of the second resistor, and the gate of the first MOS tube is connected with the drain of the second MOS tube. The gate of the second MOS tube and the other end of the second resistor are connected with the other end of the first resistor respectively, and the source of the second MOS tube is grounded.

3. The circuit for device power consumption fluctuation smoothening as claimed in claim 2, wherein, The first switch module further includes the third resistor and the fourth resistor. One end of the third resistor is connected with the other end of the second resistor, and the other end of the third resistor is connected with the gate of the second MOS tube and one end of the fourth resistor respectively. The other end of the fourth resistor is connected with the source of the second MOS tube.

4. The circuit for device power fluctuation smoothening as claimed in claim 1, wherein, The second switch module includes the third MOS tube and the fourth MOS tube. The source of the third MOS tube is connected with the other end of the first resistor, the drain of the third MOS tube is used for outputting the power supply, and the gate of the third MOS tube is connected with the drain of the fourth MOS tube. The source of the fourth MOS tube is grounded, and the gate of the fourth MOS tube is used for receiving the mode control signal.

5. The circuit for device power fluctuation smoothening as claimed in claim 1 wherein, The third switch module includes the fifth MOS tube and the sixth MOS tube. The source of the fifth MOS tube is used for connecting the power supply, the drain of the fifth MOS tube is used for outputting the power supply, and the gate of the fifth MOS tube is connected with the drain of the sixth MOS tube. The gate of the sixth MOS tube is connected with the other end of the first resistor, and the source of the sixth MOS tube is grounded.

6. The circuit for device power consumption fluctuation smoothening as claimed in claim 5, wherein, The third switch module further includes the fifth resistor and the sixth resistor. One end of the fifth resistor is connected with the other end of the first resistor, and the other end of the fifth resistor is connected with the gate of the sixth MOS tube and one end of the sixth resistor respectively. The other end of the sixth resistor is connected with the source of the sixth MOS tube.

7. The circuit for device power fluctuation smoothening as claimed in claim 5, wherein, The third switch module further includes a stabilizing unit. The input end of the stabilizing unit is connected with the source of the fifth MOS tube, and the output end of the stabilizing unit is connected with the gate of the fifth MOS tube.

8. The circuit for device power fluctuation smoothening as claimed in claim 1 wherein, Further include a current constraint module; The input end of the current constraint module is used for connecting with the power supply, and the output end of the current constraint module is connected with one end of the first resistor and the power input end of the first switch module respectively.

9. The circuit for device power fluctuation smoothening as claimed in claim 8, wherein, The current constraint module includes at least one diode; The positive electrode of the diode is connected with the power supply, and the negative electrode is connected with one end of the first resistor and the power input end of the first switch module respectively.

10. The circuit for device power fluctuation smoothening as claimed in claim 1 wherein, The energy storage module comprises a capacitor. The positive electrode of the capacitor is connected with the other end of the first resistor, and the negative electrode of the capacitor is grounded.

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