CN222262496U - A constant current power supply module - Google Patents
A constant current power supply module Download PDFInfo
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- CN222262496U CN222262496U CN202420993302.2U CN202420993302U CN222262496U CN 222262496 U CN222262496 U CN 222262496U CN 202420993302 U CN202420993302 U CN 202420993302U CN 222262496 U CN222262496 U CN 222262496U
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Abstract
本实用新型提供一种恒流电源模块，包括电路板以及设置于电路板上的第一电源转换芯片78M05、第一MOS管、第二MOS管以及第二电源转换芯片L6726A；电路板的一端设置有电源输入接口，电源输入接口用于输入第一直流电源，电路板的另一端设置有电源输出接口，电源输出接口用于向外输出第二直流电源；第一电源转换芯片78M05将第一直流电源转为第三直流电源，第二电源转换芯片L6726A将第三直流电源转为第二直流电源，并动态调整其输出的电流大小，使其趋于稳定；该恒流电源模块能够稳定地提供电流恒定的电源，确保电解装置在各种条件下都能正常工作，即使发生短路，也不会导致电流突然增大，从而保护电解装置不受损坏；恒流电源模块还具有体积小，造价成本低的特点。
The utility model provides a constant current power supply module, comprising a circuit board and a first power conversion chip 78M05, a first MOS tube, a second MOS tube and a second power conversion chip L6726A arranged on the circuit board; a power input interface is arranged at one end of the circuit board, the power input interface is used to input a first direct current power supply, and a power output interface is arranged at the other end of the circuit board, the power output interface is used to output a second direct current power supply to the outside; the first power conversion chip 78M05 converts the first direct current power supply into a third direct current power supply, and the second power conversion chip L6726A converts the third direct current power supply into a second direct current power supply, and dynamically adjusts the output current thereof to make it stable; the constant current power supply module can stably provide a power supply with a constant current, ensure that the electrolysis device can work normally under various conditions, and even if a short circuit occurs, the current will not suddenly increase, thereby protecting the electrolysis device from damage; the constant current power supply module also has the characteristics of small size and low cost.
Description
Technical Field
The utility model relates to the field of power supplies, in particular to a constant current power supply module.
Background
The hydrogen-producing water purifier is one kind of hydrogen-rich water producing apparatus to produce hydrogen through electrolysis of water and to dissolve hydrogen into water to produce hydrogen-rich water. The inside of the hydrogen production water purifier is provided with an electrolysis module to generate hydrogen, and constant current is needed to be provided in the working process of the electrolysis module, namely a constant current power supply is needed. The constant current power supply in the prior art has high manufacturing cost and larger volume.
Disclosure of utility model
In order to solve the technical problems, the technical scheme adopted by the utility model is to provide a constant current power supply module which comprises a circuit board, a first power supply conversion chip 78M05, a first MOS tube, a second MOS tube and a second power supply conversion chip L6726A, wherein the first power supply conversion chip 78M05, the first MOS tube, the second MOS tube and the second power supply conversion chip L6726A are arranged on the circuit board, one end of the circuit board is provided with a power supply input interface which is used for inputting a first direct current power supply, the other end of the circuit board is provided with a power supply output interface which is used for outputting a second direct current power supply outwards, the input end of the first power supply conversion chip 78M05 is electrically connected with the first direct current power supply, the output end of the second power supply conversion chip L6726A is electrically connected with the third direct current power supply, the first power supply conversion chip L6726A is electrically connected with the grid electrode of the first MOS tube, the drain electrode of the first MOS tube is electrically connected with the first direct current power supply source, the drain electrode of the second MOS tube is electrically connected with the second power supply conversion chip L26A, the second power supply monitoring end of the second MOS tube is electrically connected with the second drain electrode of the second MOS tube, and the second power supply end of the second MOS tube is electrically connected with the second drain electrode of the second MOS tube.
In the embodiment of the application, the constant current power supply module further includes an operational amplifier LM321 disposed on the circuit board, a positive phase input end of the operational amplifier LM321 is electrically connected to a negative electrode of the power output interface, a negative phase input end and a power supply end of the operational amplifier LM321 are both electrically connected to a third dc power supply, and an output end of the operational amplifier LM321 is electrically connected to a feedback end of the second power conversion chip L6726A.
In an embodiment of the application, the drain electrode of the first MOS transistor is further electrically connected to the negative electrode of the first protection diode, the positive electrode of the first protection diode is grounded, the negative electrode of the first protection diode is electrically connected to one end of the first protection resistor, and the other end of the first protection resistor is electrically connected to the first capacitor and then grounded.
In the embodiment of the application, the output end of the operational amplifier LM321 is electrically connected to the first feedback resistor and then connected to the feedback end of the second power conversion chip L6726A, the feedback end of the second power conversion chip L6726A is further electrically connected to the second feedback resistor and then grounded, the feedback end of the second power conversion chip L6726A is further connected in series to the third feedback resistor and then connected to the second end of the inductor, and the feedback end of the second power conversion chip L6726A is further connected in series to the fourth feedback resistor and the second capacitor in sequence and then connected to the second end of the inductor.
In the embodiment of the application, the negative phase input end of the operational amplifier LM321 is electrically connected to the first voltage dividing resistor and then grounded, and is also electrically connected to the second voltage dividing resistor and then connected to the third dc power supply.
In the embodiment of the application, the negative phase input end of the operational amplifier LM321 is further connected in series with a second protection resistor and a third capacitor, and then connected to the output end of the operational amplifier LM 321.
In the embodiment of the application, the positive input end of the operational amplifier LM321 is electrically connected to the first detection resistor and then connected to the negative electrode of the power output interface, and the negative electrode of the power output interface is also electrically connected to the second detection resistor and then grounded.
In the embodiment of the application, the third driving end of the second power conversion chip L6726A is electrically connected to the fourth capacitor and then connected to the drain electrode of the first MOS transistor, the third driving end of the second power conversion chip L6726A is further electrically connected to the third protection resistor and then connected to the negative electrode of the second protection diode, and the positive electrode of the second protection diode is electrically connected to the third dc power supply.
In the embodiment of the application, the input end of the first power conversion chip 78M05 is further electrically connected to the negative electrode of the third protection diode, and the positive electrode of the third protection diode is electrically connected to the ground end of the first power conversion chip 78M 05.
In the embodiment of the application, the circuit board is rectangular overall, and fixing holes are formed in four end corners of the circuit board along the circumferential direction of the circuit board.
The constant-current power supply module has the advantages that the constant-current power supply module comprises a circuit board, a first power supply conversion chip 78M05, a first MOS tube, a second MOS tube and a second power supply conversion chip L6726A which are arranged on the circuit board, a power supply input interface is arranged at one end of the circuit board and used for inputting a first direct-current power supply, a power supply output interface is arranged at the other end of the circuit board and used for outputting a second direct-current power supply outwards, the first power supply conversion chip 78M05 converts the first direct-current power supply into a third direct-current power supply, the second power supply conversion chip L6726A converts the third direct-current power supply into the second direct-current power supply, the output current is dynamically adjusted to be stable, the constant-current power supply module can stably provide a constant-current power supply, the electrolytic device can normally work under various conditions, even if short circuit occurs, the current is not increased suddenly, the electrolytic device is prevented from being damaged, and the constant-current power supply module has the advantages of small size and low cost.
Drawings
FIG. 1 is a schematic diagram of a circuit board of a constant current power module of the present utility model;
FIG. 2 is a schematic diagram of a first power conversion chip 78M05 in a constant current power module according to the present utility model;
Fig. 3 is a schematic diagram of a second power conversion chip L6726A in the constant current power module according to the present utility model;
Fig. 4 is a schematic connection diagram of a first MOS transistor and a second MOS transistor in a constant current power supply module according to the present utility model;
Fig. 5 is a schematic diagram of an operational amplifier LM321 in a constant current power module according to the present utility model.
Detailed Description
In order that the utility model may be readily understood, a more particular description thereof will be rendered by reference to specific embodiments that are illustrated in the appended drawings. Preferred embodiments of the present utility model are shown in the drawings. This utility model may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.
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 utility model belongs. The terminology used in the description of the utility model herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the utility model. The term "and/or" as used in this specification includes any and all combinations of one or more of the associated listed items.
The utility model provides a constant-current power supply module which can be applied to a hydrogen production water purifier and can stably provide constant-current output for an electrolysis device in the hydrogen production water purifier, ensure that the electrolysis device can work normally under various conditions, and can not cause sudden increase of current even if short circuit occurs, thereby protecting the electrolysis device from damage. The constant current power supply module has the characteristics of small volume and low manufacturing cost.
Specifically, as shown in fig. 1 to 5, as a specific embodiment of the constant current power supply module, the constant current power supply module includes a circuit board 101, and a first power supply conversion chip 78M05 (U3 in fig. 1), a first MOS transistor Q1, a second MOS transistor Q2, and a second power supply conversion chip L6726A (U1 in fig. 1) disposed on the circuit board 101, wherein one end of the circuit board 101 is provided with a power supply input interface J3, the power supply input interface J3 is used for inputting a first direct current power supply +24v, the first direct current power supply +24v is converted by the first power supply conversion chip 78M05 and the second power supply conversion chip L6726A, and then a second direct current power supply +2.7v is output to the outside through a power supply output interface (composed of an anode J1 and a cathode J2) at the other end of the circuit board 101, that is, the voltage of the second direct current power supply is +2.7v is supplied to an electrolysis device in the water purifier.
In this embodiment, as shown in fig. 1, the circuit board 101 is rectangular overall, and has a length of 100mm and a width of 40mm, and fixing holes 102 are provided at four end corners of the circuit board 101 along the circumferential direction of the circuit board 101, so as to facilitate fixing.
In this embodiment, as shown in fig. 2, the input terminal Vin of the first power conversion chip 78M05 is electrically connected to the first dc power source +24v, the output terminal Vout outputs the third dc power source +5v, and the ground terminal GND of the first power conversion chip 78M05 is grounded.
The input end Vin of the first power conversion chip 78M05 is further electrically connected to the negative electrode of the third protection diode D3, the positive electrode of the third protection diode D3 is electrically connected to the ground end GND of the first power conversion chip 78M05, and the third protection diode D3 protects the first power conversion chip 78M05 from reverse connection of the positive electrode and the negative electrode of the first direct current power supply +24v.
The input end Vin of the first power conversion chip 78M05 is further connected in series to a capacitor C15 and a capacitor C16 and then grounded, the capacitor C15 and the capacitor C16 filter the input first dc power +24v, the output end Vout of the first power conversion chip 78M05 is further connected in series to a capacitor C17 and a capacitor C18 and then grounded, and the capacitor C17 and the capacitor C18 filter the output third dc power +5v.
As shown in fig. 3 and fig. 4, in the embodiment, the power supply end VCC of the second power conversion chip L6726A in fig. 3 is electrically connected to the third dc power source +5v, the first driving end LGATE of the second power conversion chip L6726A is electrically connected to the gate of the first MOS transistor Q1 in fig. 4, the source of the first MOS transistor Q1 is electrically connected to the first dc power source +24v, the drain is electrically connected to the PHASE monitoring end PHASE of the second power conversion chip L6726A, the PHASE monitoring end PHASE of the second power conversion chip L6726A is also electrically connected to the first end of an inductor L1, the second end of the inductor L1 outputs the second dc power source +2.7v, the drain of the first MOS transistor Q1 is also electrically connected to the source of the second MOS transistor Q2, and the gate of the second MOS transistor Q2 is electrically connected to the second driving end UGATE of the second power conversion chip L6726A, and the drain of the second MOS transistor Q2 is electrically connected to the first dc power source +24v. In this embodiment, the second power conversion chip L6726A can convert the third dc power +5v into the second dc power +2.7v for output.
As shown in fig. 4 and 5, in the present embodiment, the drain electrode of the first MOS transistor Q1 is further electrically connected to the negative electrode of the first protection diode D2, the positive electrode of the first protection diode D2 is grounded, the negative electrode of the first protection diode D2 is electrically connected to one end of the first protection resistor R13, and the other end of the first protection resistor R13 is electrically connected to the first capacitor C12 and then grounded.
In this embodiment, in fig. 3, the third driving end BOOT of the second power conversion chip L6726A is electrically connected to the fourth capacitor C1 and then connected to the drain of the first MOS transistor Q1, the third driving end BOOT of the second power conversion chip L6726A is further electrically connected to the third protection resistor R1 and then connected to the negative electrode of the second protection diode D1, and the positive electrode of the second protection diode D1 is electrically connected to the third dc power supply +5v.
Further, as shown IN fig. 1 and 5, IN the present embodiment, the constant current power supply module further includes an operational amplifier LM321 (U2 IN fig. 1) disposed on the circuit board 101, a positive phase input terminal +in of the operational amplifier LM321 is electrically connected to a negative electrode (J2) of the power output interface, a negative phase input terminal-IN and a power supply terminal v+ of the operational amplifier LM321 are both electrically connected to a third dc power supply +5v, an output terminal OUT of the operational amplifier LM321 is electrically connected to a first feedback resistor R9 and then connected to a feedback terminal FB of the second power conversion chip L6726A, IN the present embodiment, the operational amplifier LM321 detects a current output by the second dc power supply +2.7v through the negative phase input terminal-IN, and transmits a detection signal to the feedback terminal FB of the second power conversion chip L6726A, and the second power conversion chip L6726A adjusts a current size of the second dc power supply +2v output by turning on or off the first MOS transistor Q1 and the second MOS transistor Q2, so that the current of the second dc power supply +2v tends to be stable.
In this embodiment, the feedback end of the second power conversion chip L6726A is further electrically connected to the second feedback resistor R5 and then grounded, the feedback end FB of the second power conversion chip L6726A is further connected in series with the third feedback resistor R7 and then connected to the second end of the inductor L1, the feedback end of the second power conversion chip L6726A is further connected in series with the fourth feedback resistor R8 and the second capacitor C6 in sequence and then connected to the second end of the inductor L1, and the second end of the inductor L1 is further connected in series with the capacitor C7, the capacitor C8, the capacitor C9 and the capacitor C10 and then grounded, respectively, and these capacitors are used for filtering the second dc power supply output by the inductor L1.
IN this embodiment, the negative phase input terminal-IN of the operational amplifier LM321 is electrically connected to the first voltage dividing resistor R10 and then grounded, and is further electrically connected to the second voltage dividing resistor R11 and then connected to the third dc power supply +5v, and the negative phase input terminal-IN of the operational amplifier LM321 is further connected IN series to the second protection resistor R12 and the third capacitor C11 and then connected to the output terminal OUT of the operational amplifier LM 321.
IN this embodiment, the positive input terminal +in of the operational amplifier LM321 is electrically connected to the first detection resistor R6 and then connected to the negative electrode (J2) of the power output interface, and the negative electrode (J2) of the power output interface is also electrically connected to the second detection resistor R4 and then grounded. In the working process of the constant current power supply module, current is fed back to the feedback end of the second power supply conversion chip L6726A through the operational amplifier LM321, and the output current of the second power supply conversion chip L6726A is dynamically adjusted to be stable.
Therefore, the constant current power supply module comprises a circuit board, a first power supply conversion chip 78M05, a first MOS tube, a second MOS tube and a second power supply conversion chip L6726A which are arranged on the circuit board, wherein one end of the circuit board is provided with a power supply input interface which is used for inputting a first direct current power supply, the other end of the circuit board is provided with a power supply output interface which is used for outputting a second direct current power supply outwards, the first power supply conversion chip 78M05 converts the first direct current power supply into a third direct current power supply, the second power supply conversion chip L6726A converts the third direct current power supply into the second direct current power supply, the output current of the second power supply is dynamically adjusted to enable the third direct current power supply to tend to be stable, the constant current power supply module can stably provide a constant current power supply, the electrolytic device can normally work under various conditions, even if a short circuit occurs, the current is not suddenly increased, the electrolytic device is protected from being damaged, and the constant current power supply module has the characteristics of small size and low cost.
The foregoing description is only illustrative of the present utility model and is not intended to limit the scope of the utility model, and all equivalent structural changes made by the present utility model and the accompanying drawings, or direct or indirect application in other related technical fields, are included in the scope of the present utility model.
Claims (10)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202420993302.2U CN222262496U (en) | 2024-05-08 | 2024-05-08 | A constant current power supply module |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202420993302.2U CN222262496U (en) | 2024-05-08 | 2024-05-08 | A constant current power supply module |
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| Publication Number | Publication Date |
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| CN222262496U true CN222262496U (en) | 2024-12-27 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202420993302.2U Active CN222262496U (en) | 2024-05-08 | 2024-05-08 | A constant current power supply module |
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| CN (1) | CN222262496U (en) |
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