Power supply circuit

Abstract

The invention relates to the technical field of circuit design, in particular to a power supply circuit which comprises an initial power supply circuit and an electrostatic discharge module, the input end of the initial power supply circuit is connected with an external power supply, and the output end of the initial power supply circuit is connected with the electrostatic discharge module; the initial power supply circuit is used for carrying out voltage conversion processing on the external power supply to generate a to-be-output voltage; and the electrostatic discharge module is used for discharging the electrostatic current in the voltage to be output. According to the circuit, by introducing the extra electrostatic discharge module, electrostatic current in the voltage to be output of the initial power supply circuit can be discharged, so that other components of the power supply are protected, a more stable power supply can be provided, and the power supply and matching characteristics are more stable.

Description

Technical Field

[0001] The present invention relates to the technical field of circuit design, and in particular to a power supply circuit in the technical field of circuit design. Background Art

[0002] In the related art, most of the solutions for power circuit adaptation rely on avoiding sensitive precision components, so that the electrostatic energy is consumed by itself between the various components inside the power supply. For example, in the power circuit of the related art, the input AC is converted into DC through a rectifier; and a rectifier filter device is formed by a capacitor and a filter inductor to filter out the interference mixed with the mains; and an input protection element is formed by a fuse and a varistor. And through the control IC, the voltage and current output of the entire product are controlled in conjunction with the peripheral chip resistors and capacitors, and the secondary charging and discharging capacitor current is used to provide direct power for the output. However, in this power circuit, when high-energy static electricity comes, the power supply will be damaged, or the adapter will restart, resulting in abnormal power supply to the supporting equipment. Summary of the invention

[0003] The object of the present invention is to provide a power supply circuit, and the technical solution adopted is as follows:

[0004] An embodiment of the present invention provides a power supply circuit, which includes: an initial power supply circuit and an electrostatic discharge module, wherein: an input end of the initial power supply circuit is connected to an external power supply, and an output end of the initial power supply circuit is connected to the electrostatic discharge module;

[0005] The initial power supply circuit is used to perform voltage conversion processing on the external power supply to generate a voltage to be output;

[0006] The electrostatic discharge module is used to discharge the electrostatic current in the voltage to be output.

[0007] In some possible implementations, the electrostatic discharge module includes: a first discharge unit or a second discharge unit; wherein:

[0008] The first discharge unit is used to perform voltage division processing on the electrostatic current in the voltage to be output, so as to obtain and output the target voltage;

[0009] The second discharge unit is used to consume the electrostatic current to obtain and output the target voltage.

[0010] In some possible implementations, the first discharge unit includes: a first resistor, a second resistor, a third resistor and a fourth resistor; wherein the first resistor, the second resistor, the third resistor and the fourth resistor are connected in series; one end of the first resistor is connected to the negative pole of the output module, and the other end is grounded.

[0011] In some possible implementations, the second discharge unit includes: an electrolytic capacitor and at least two current consumption loops connected in parallel; wherein,

[0012] The current consumption circuit is used to consume the electrostatic current through the electrolytic capacitor to obtain and output the target voltage.

[0013] In some possible implementations, the current consumption loop includes: a first diode, a second diode, a fifth resistor and a sixth resistor; wherein:

[0014] The fifth resistor and the sixth resistor are connected in parallel; one end of the fifth resistor and the sixth resistor are connected in parallel to the positive electrode of the first diode, and the other end is connected to the negative electrode of the second diode; the negative electrode of the first diode is connected to the first end of the electrolytic capacitor, and the positive electrode of the second diode is connected to the other end of the electrolytic capacitor.

[0015] In some possible implementations, the second diode is a photodiode.

[0016] In some possible implementations, the current consumption loop is further used to charge the electrolytic capacitor based on the electrostatic current; when the voltage of the electrolytic capacitor increases to a preset voltage threshold, the current consumption loop is turned on.

[0017] In some possible implementations, the initial power supply circuit includes: an input module, a voltage processing module and an output module; wherein: one end of the input module is connected to an external power supply, and the other end is connected to a first end of the voltage processing module; the second end of the voltage processing module is connected to one end of the output module, and the negative pole of the output module is connected to the electrostatic discharge module;

[0018] The voltage processing module is used to filter and convert the voltage of the external power supply to obtain a processed voltage;

[0019] The output module is used to generate the voltage to be output based on the processed voltage.

[0020] In some possible implementations, the voltage processing module includes: a first filtering unit and a control unit; wherein one end of the first filtering unit is connected to the output end of the input module, the other end is connected to the first end of the control unit, and the second end of the control unit is connected to the output module;

[0021] The first filtering unit is used to filter the external power supply to obtain a filtered voltage;

[0022] The control unit is used to control the generation of the processed voltage based on the filtered voltage.

[0023] In some possible implementations, the output module includes: an energy converter, a second filtering unit and an output unit; a first end of the energy converter is connected to a second end of the voltage processing module, a second end of the energy converter is connected to a first end of the second filtering unit, and a second end of the second filtering unit is connected to the output unit;

[0024] The energy converter is used to perform energy conversion on the processed voltage to obtain a converted voltage;

[0025] The second filtering unit is used to filter the converted voltage to obtain the voltage to be output, and transmit it to the output unit.

[0026] The present invention has the following beneficial effects: a power supply circuit is formed by an initial power supply circuit and an electrostatic discharge module, wherein the input end of the initial power supply circuit is connected to an external power supply, and the output end of the initial power supply circuit is connected to the electrostatic discharge module; in this way, the electrostatic current output by the negative pole of the output module can be discharged through the electrostatic discharge module. The external power supply is subjected to voltage conversion processing by the initial power supply circuit to generate a voltage to be output; since the output end of the initial power supply circuit is connected to the electrostatic discharge module, the electrostatic current in the voltage to be output can be discharged through the electrostatic discharge module. In this way, by introducing an additional electrostatic discharge module into the power supply circuit, the electrostatic current in the voltage to be output of the initial power supply circuit can be discharged, thereby protecting the remaining components of the power supply, and providing a more stable power supply, thereby making the power supply and supporting characteristics more stable. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the technical solutions and advantages in the embodiments of the present invention or the prior art, the drawings required for use in the embodiments or the prior art descriptions are briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0028] Figure 1 It is a schematic diagram of the composition structure of a power supply circuit provided by an embodiment of the present invention;

[0029] Figure 2 It is a schematic diagram of the composition structure of a power supply circuit provided by the relevant technology;

[0030] Figure 3 This is another schematic diagram of the structure of a power supply circuit provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0031] In order to further explain the technical means and effects adopted by the present invention to achieve the predetermined invention purpose, the following is a detailed description of a power circuit proposed according to the present invention, its specific implementation, structure, features and effects, in conjunction with the accompanying drawings and preferred embodiments. In the following description, different "one embodiment" or "another embodiment" does not necessarily refer to the same embodiment. In addition, specific features, structures or characteristics in one or more embodiments may be combined in any suitable form.

[0032] Among them, in the description of the embodiments of the present invention, unless otherwise specified, " / " means or, for example, A / B can mean A or B: "and / or" in the text is only a way to describe the association relationship of associated objects, indicating that there can be three relationships, for example, A and / or B can mean: A exists alone, A and B exist at the same time, and B exists alone. In addition, in the description of the embodiments of the present invention, "multiple" refers to two or more than two.

[0033] In the following, the terms "first" and "second" are used for descriptive purposes only and are not to be understood as suggesting or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features.

[0034] Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs.

[0035] The following is a detailed description of a specific scheme of a power supply circuit provided by the present invention in conjunction with the accompanying drawings. Figure 1 , which shows a schematic diagram of the composition structure of a power supply circuit provided by an embodiment of the present invention, the power supply circuit 100, comprising: an initial power supply circuit 101 and an electrostatic discharge module 102, wherein: the input end of the initial power supply circuit 101 is connected to an external power supply, and the output end of the initial power supply circuit 101 is connected to the electrostatic discharge module 102.

[0036] The initial power supply circuit 101 is used to perform voltage conversion processing on the external power supply to generate a voltage to be output.

[0037] Here, the initial power supply circuit includes: an input module, a voltage processing module and an output module; wherein: one end of the input module is connected to an external power supply, and the other end is connected to a first end of the voltage processing module; the second end of the voltage processing module is connected to one end of the output module, and the negative pole of the output module is connected to the electrostatic discharge module; in this way, one end of the input module is connected to an external power supply, and the other end is connected to the first end of the voltage processing module; the second end of the voltage processing module is connected to one end of the output module, and the electrostatic discharge module is connected to the negative pole of the output module; the voltage processing module performs voltage processing on the external power supply to obtain a processed voltage; then, the output module generates a voltage to be output based on the processed voltage; finally, the electrostatic discharge module discharges the electrostatic current in the voltage to be output, so that the electrostatic discharge module can discharge the energy in the electrostatic current in time, so that the voltage provided by the power supply circuit is more stable.

[0038] In some possible implementations, the input module may be as follows Figure 2 The input ports CAN and ACL are shown; the input ports CAN and ACL are mains input ports for inputting external power.

[0039] The voltage processing module is used to filter and convert the voltage of the external power supply to obtain a processed voltage.

[0040] Here, the voltage processing module includes: a first filtering unit and a control unit; wherein one end of the first filtering unit is connected to the output end of the input module, the other end is connected to the first end of the control unit, and the second end of the control unit is connected to the output module; the first filtering unit is used to filter the external power supply to obtain a filtered voltage; the control unit is used to control the generation of the processed voltage based on the filtered voltage. Figure 2 As shown, F1 is a fuse, MOV1 is a varistor, and the first two are input protection components; DB1 is a rectifier that converts AC into DC; CX1 is used to filter the input external voltage, for example, to filter out impurities in the external voltage so that the initial charge is relatively stable. C11 / CD1 / LF1 / LF2 are rectifier filter components that filter out interference from the mains; IC1 is a control IC that cooperates with peripheral chip resistors and capacitors to control the voltage and current output of the entire product; T1 is a high and low voltage energy conversion component; IC3 is a freewheeling diode; CD3 and CD5 are secondary charging and discharging capacitor currents that provide direct power for the output. In this way, the first filtering unit may include Figure 2 C11, CD1, LF1, LF2, CX1, DB1 and NTC1. Figure 2 In the circuit, resistors R1, R2, R1A, R2A, R3a, and R3b are startup resistors for charging capacitors CD2a and CD2.

[0041] The control unit may include Figure 2 Capacitors CD2a, CD2, C5, C6, C3, C10, C8, C12, C9, CD3, CD5; diodes D4, D8, D1, D2, D3; Integrated Circuit 1 (IC) (i.e. IC1), IC2, IC3; resistors R12, R21, NTC2, R4a, R4b, R4c, R11, R5, R23, R8, R9, R20, R6a, R6b, R6, R30, R17B, R17D, R17C, R16, R19, R13, R22, R15, R14a, R14b, R6, R30. Among them: capacitors CD2a, CD2, C5, C3, C10, C8, C12, C9, CD3, CD5; diodes D4, D8, D1, D2, D3; resistors R12, R21, NTC2, R4a, R4b, R4c, R11, R5, R23, R8, R9, R20, R6a, R6b, R6, R30, R17B, R17D, R17C, R16, R19, R13, R22, R15, R14a, R14b, R6, R30 and other components are used to control the normal operation of the adapters of integrated circuit 1 (Integrated Circuit, IC) (i.e. IC1), IC2, IC3 to output current or voltage.

[0042] The output module is used to generate the voltage to be output based on the processed voltage.

[0043] Here, the output module can include Figure 2 The transient suppression diode TVS1, the resistor 15, the capacitor C7 and the filter inductor LF2 are shown. The output module obtains the output voltage by filtering out impurities from the processed voltage.

[0044] The electrostatic discharge module is used to discharge the electrostatic current in the voltage to be output.

[0045] Here, the electrostatic discharge module can discharge the electrostatic current in the output voltage through a grounding resistor or a light diode connected in series. In some possible implementations, the electrostatic discharge module includes: a first discharge unit or a second discharge unit; wherein:

[0046] The first discharge unit is used to perform voltage division processing on the electrostatic current in the voltage to be output, so as to obtain and output the target voltage.

[0047] Here, the first discharge unit includes: a first resistor, a second resistor, a third resistor and a fourth resistor, such as Figure 3The resistors R29, R332, R31, and R26 shown in the figure; the first resistor, the second resistor, the third resistor, and the fourth resistor are connected in series; one end of the first resistor is connected to the negative pole of the output module, and the other end is grounded. That is, the resistors R29, R332, R31, and R26 are connected in series, one end of the resistor R29 is grounded, and one end of R26 is grounded. Static electricity is mainly transmitted to the power supply through the negative pole (v-) of the output position. When static electricity comes, through the resistors R29, R332, R31, and R26, when the static electricity current passes through these resistors, it is discharged from the negative pole V- to the ground position of CD1. Through this loop, the energy is partially discharged to automatically discharge the static electricity energy.

[0048] The second discharge unit is used to consume the electrostatic current to obtain and output the target voltage.

[0049] Here, the second discharge unit includes: an electrolytic capacitor and at least two current consumption circuits connected in parallel; wherein the current consumption circuit is used to consume the electrostatic current through the electrolytic capacitor to obtain and output the target voltage. Figure 3 The capacitor CD4 shown in the figure. When the electrostatic current comes, the electrolytic capacitor CD4 is charged first. When the voltage of CD4 rises to a certain voltage, D7, D6, LED1, and LED2 are turned on, and then LED1 and LED2 are turned on, so that the energy of the electrostatic current is consumed. In this way, the electrostatic current in the output voltage is discharged through the two circuits of the first discharge unit and the second discharge unit, so that the final output voltage of the power supply circuit can be more stable.

[0050] In some possible implementations, at least two current consumption loops connected in parallel may be two loops with the same structure, wherein any current consumption loop includes: a first diode, a second diode, a fifth resistor and a sixth resistor; wherein: the fifth resistor and the sixth resistor are connected in parallel; one end of the fifth resistor and the sixth resistor are connected in parallel to the positive electrode of the first diode, and the other end is connected to the negative electrode of the second diode; the negative electrode of the first diode is connected to the first end of the electrolytic capacitor, and the positive electrode of the second diode is connected to the other end of the electrolytic capacitor. The second diode is a photodiode, and the first diode and the second diode are different. Figure 3As shown, one of the current consumption loops includes: a first diode D7, a second diode LED1, a fifth resistor R28, and a sixth resistor R28A; the other current consumption loop includes: a first diode D6, a second diode LED2, a fifth resistor R27, and a sixth resistor R27A. In any current consumption loop, the electrolytic capacitor is charged based on the electrostatic current; when the voltage of the electrolytic capacitor rises to a preset voltage threshold, the current consumption loop is turned on. The preset voltage threshold can be a custom setting, for example, the preset voltage threshold is set to be less than or equal to the maximum voltage of the electrolytic capacitor. When the voltage of the electrolytic capacitor rises to the preset voltage threshold, the first diode is turned on and the second diode is lit to consume the energy of the electrostatic current.

[0051] Optionally, the transmission medium may be a wired link (such as but not limited to coaxial cable, optical fiber and digital subscriber line (DSL) etc.) or a wireless link (such as but not limited to wireless Fidelity (WIFI), Bluetooth and mobile device network etc.). It should be noted that: the system provided in the above embodiment is only illustrated by the division of the above functional modules. In actual application, the above functions can be assigned to different functional modules as needed, that is, the internal structure of the computer device can be divided into different functional modules to complete all or part of the functions described above.

[0052] In addition, the present embodiment can be implemented by multiple functional modules. For example, it can correspond to each functional module, or two or more functions can be integrated into one processing module, and the above integrated module can be implemented in the form of hardware. It should be noted that the division of modules in the present embodiment is schematic, which is only a logical function division, and there may be other division methods in actual implementation. It should be noted that all relevant contents of each step involved in the above power supply circuit embodiment can be referred to the functional description of the corresponding functional module, and will not be repeated here.

[0053] It should be understood that in the case of an integrated unit, the system may include a processing module and a storage module. When the system is applied to a device, the processing module may be used to control and manage the actions of the device. The storage module may be used to support the device to execute mutual program codes, etc. The processing module may be a processor or a controller, which may implement or execute various exemplary logic blocks, modules and circuits described in conjunction with the disclosure of the present invention. The processor may also be a combination that implements a computing function, such as a combination of one or more microprocessors, a combination of digital signal processing (DSP) and a microprocessor, etc. The storage module may be a memory.

[0054] In addition, the system provided in the embodiment of the present invention may be a chip, a component or a module, and the chip may include a connected processor and a memory; wherein the memory is used to store instructions, and when the processor calls and executes the instructions, the chip can execute a power supply circuit provided in the above embodiment. This embodiment also provides a computer-readable storage medium, in which a computer program code is stored, and when the computer program code is run on a computer, the computer executes the above-mentioned related steps to implement a power supply circuit provided in the above embodiment.

[0055] The present embodiment also provides a computer program product, when the computer program product is run on a computer, the computer executes the above-mentioned related steps to implement a power supply circuit provided by the above-mentioned embodiment. Among them, the system, computer-readable storage medium, computer program product or chip provided in the present embodiment are all used to execute the corresponding power supply circuit provided above, so the beneficial effects that can be achieved can refer to the beneficial effects in the corresponding power supply circuit provided above, and will not be repeated here. Through the description of the above implementation mode, the technicians in the relevant field can understand that for the convenience and simplicity of description, only the division of the above-mentioned functional modules is used as an example. In practical applications, the above-mentioned function allocation can be completed by different functional modules as needed, that is, the internal structure of the system is divided into different functional modules to complete all or part of the functions described above. In the embodiments provided by the present invention, it should be understood that the disclosed system and power supply circuit can be implemented in other ways. For example, the system embodiment described above is only schematic, for example, the division of modules or units is only a logical function division, and there may be other division methods in actual implementation, for example, multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed may be an indirect coupling or communication connection through some interface, system or unit, which may be electrical, mechanical or other forms.

[0056] It should be noted that the sequence of the above-mentioned embodiments of the present invention is only for description and does not represent the advantages and disadvantages of the embodiments. The process depicted in the accompanying drawings does not necessarily require the specific order or continuous order shown to achieve the desired results. In some embodiments, multi-task processing and parallel processing are also possible or may be advantageous. The various embodiments in this specification are described in a progressive manner, and the same and similar parts between the various embodiments can be referenced to each other, and each embodiment focuses on the differences from other embodiments. The above content is only a specific implementation method of the present invention, but the protection scope of the present invention is not limited to this. Any technician familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed by the present invention, which should be covered within the protection scope of the present invention.

Claims

1. A power supply circuit, characterized in that: The power supply circuit comprises: an initial power supply circuit and an electrostatic discharge module, wherein: an input end of the initial power supply circuit is connected to an external power supply, and an output end of the initial power supply circuit is connected to the electrostatic discharge module; The initial power supply circuit is used to perform voltage conversion processing on the external power supply to generate a voltage to be output; The electrostatic discharge module is used to discharge the electrostatic current in the voltage to be output.

2. A power supply circuit according to claim 1, characterized in that: The electrostatic discharge module comprises: a first discharge unit or a second discharge unit; wherein: The first discharge unit is used to perform voltage division processing on the electrostatic current in the voltage to be output, so as to obtain and output the target voltage; The second discharge unit is used to consume the electrostatic current to obtain and output the target voltage.

3. A power supply circuit according to claim 2, characterized in that: The first discharge unit includes: a first resistor, a second resistor, a third resistor and a fourth resistor; wherein the first resistor, the second resistor, the third resistor and the fourth resistor are connected in series; one end of the first resistor is connected to the negative electrode of the output module, and the other end is grounded.

4. A power supply circuit according to claim 2, characterized in that: The second discharge unit comprises: an electrolytic capacitor and at least two current consumption loops connected in parallel; wherein, The current consumption circuit is used to consume the electrostatic current through the electrolytic capacitor to obtain and output the target voltage.

5. A power supply circuit according to claim 4, characterized in that: The current consumption loop includes: a first diode, a second diode, a fifth resistor and a sixth resistor; wherein: The fifth resistor and the sixth resistor are connected in parallel; one end of the fifth resistor and the sixth resistor are connected in parallel to the positive electrode of the first diode, and the other end is connected to the negative electrode of the second diode; the negative electrode of the first diode is connected to the first end of the electrolytic capacitor, and the positive electrode of the second diode is connected to the other end of the electrolytic capacitor.

6. A power supply circuit according to claim 5, characterized in that: The second diode is a photodiode.

7. A power supply circuit according to claim 5 or 6, characterized in that: The current consumption circuit is also used to charge the electrolytic capacitor based on the electrostatic current; when the voltage of the electrolytic capacitor increases to a preset voltage threshold, the current consumption circuit is turned on.

8. A power supply circuit according to claim 1, characterized in that: The initial power supply circuit includes: an input module, a voltage processing module and an output module; wherein: one end of the input module is connected to an external power supply, and the other end is connected to a first end of the voltage processing module; the second end of the voltage processing module is connected to one end of the output module, and the negative pole of the output module is connected to the electrostatic discharge module; The voltage processing module is used to filter and convert the voltage of the external power supply to obtain a processed voltage; The output module is used to generate the voltage to be output based on the processed voltage.

9. A power supply circuit according to claim 1, characterized in that: The voltage processing module includes: a first filtering unit and a control unit; wherein one end of the first filtering unit is connected to the output end of the input module, the other end is connected to the first end of the control unit, and the second end of the control unit is connected to the output module; The first filtering unit is used to filter the external power supply to obtain a filtered voltage; The control unit is used to control the generation of the processed voltage based on the filtered voltage.

10. A power supply circuit according to claim 1, characterized in that: The output module comprises: an energy converter, a second filtering unit and an output unit; the first end of the energy converter is connected to the second end of the voltage processing module, the second end of the energy converter is connected to the first end of the second filtering unit, and the second end of the second filtering unit is connected to the output unit; The energy converter is used to perform energy conversion on the processed voltage to obtain a converted voltage; The second filtering unit is used to filter the converted voltage to obtain the voltage to be output, and transmit it to the output unit.

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