Driving circuit, PCB and square driving power supply

Abstract

The utility model discloses a driving circuit, a PCB and a square driving power supply. The driving circuit comprises an input processing unit, a control unit, a transformer T1 and a stroboflash removing unit. The input end of the input processing unit is used for being connected with an external power supply device, the output end of the input processing unit is connected with the power input end of the control unit and a primary coil of the transformer T1, and an auxiliary coil of the transformer T1 is connected with the working power end of the control unit. The control end of the control unit is connected with a primary coil of the transformer T1, a secondary coil of the transformer T1 is connected with the input end of the stroboflash removing unit, and the output end of the stroboflash removing unit is used for being connected with a lighting lamp. A primary coil of the transformer T1 is in induction connection with a secondary coil and an auxiliary coil of the transformer T1. According to the driving circuit disclosed by the invention, the stroboscopic effect generated by the lighting lamp can be reduced by configuring the stroboscopic removing unit, so that the lighting quality and the use experience of a user are greatly improved.

Description

Technical Field

[0001] This utility model relates to the field of drive circuit technology, and in particular to a drive circuit, PCB board and square drive power supply. Background Technology

[0002] In traditional power circuit design, the output voltage after rectification and filtering usually still has a certain degree of voltage ripple. The presence of voltage ripple can have many effects on the operation of lamps connected to the driver power supply. First, voltage ripple may cause unstable brightness of the lamp light source, resulting in flickering and affecting the lighting effect and the user's visual comfort. Second, voltage ripple may also cause abnormal heating of the internal circuit of the lamp, accelerating the aging of components and shortening the life of the lamp. This effect is particularly significant for precision electronic equipment such as LED lamps. Specifically, voltage ripple may cause the performance of LED chips to degrade, color temperature to shift, and even cause lamp failure.

[0003] It is evident that existing technologies still need improvement and enhancement. Utility Model Content

[0004] In view of the shortcomings of the prior art, the purpose of this utility model is to provide a driving circuit that, by configuring a flicker-reducing unit, can reduce the flicker effect generated by lighting fixtures, thereby improving lighting quality and user experience.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A driving circuit includes an input processing unit, a control unit, a transformer T1, and a flicker removal unit. The input terminal of the input processing unit is connected to an external power supply device. The output terminal of the input processing unit is connected to the power input terminal of the control unit and the primary coil of the transformer T1. The auxiliary coil of the transformer T1 is connected to the operating power supply terminal of the control unit. The control terminal of the control unit is connected to the primary coil of the transformer T1. The secondary coil of the transformer T1 is connected to the input terminal of the flicker removal unit. The output terminal of the flicker removal unit is used to connect to a lighting fixture. The primary coil of the transformer T1 is inductively connected to its secondary coil and the auxiliary coil.

[0007] In the driving circuit, the input processing unit includes a first filter section, a rectifier section, and a second filter section. The input terminal of the first filter section is used to connect to an external power supply device. The output terminal of the first filter section is connected to the input terminal of the rectifier section. The output terminal of the rectifier section is connected to the input terminal of the second filter section. The output terminal of the second filter section is connected to the power input terminal of the control unit and the primary coil of the transformer T1, respectively.

[0008] In the driving circuit, the first filtering section includes an overload protection group and a filtering group. The input terminal of the overload protection group is used to connect to an external power supply device, and the output terminal of the overload protection group is connected to the input terminal of the rectifier section through the filtering group.

[0009] In the driving circuit, the control unit includes a control chip IC1, a voltage divider, a voltage regulator, and a clamping unit. The output terminal of the input processing unit is connected to the VIN pin of the control chip IC1 through the voltage divider. The auxiliary coil is connected to the VCC pin of the control chip IC1 through the voltage regulator. The DRAIN pin of the control chip IC1 is connected to the primary coil of the transformer T1 through the clamping unit.

[0010] In the aforementioned driving circuit, the control unit further includes a detection unit, a setting unit, and a restart unit. The detection unit is connected to pin CS of the control chip IC1, the setting unit is connected to pin SET of the control chip IC1, and the restart unit is connected to pin RTH of the control chip IC1.

[0011] In the driving circuit, the flicker removal unit includes a third filter section and a flicker removal section. The input terminal of the third filter section is connected to the secondary coil of the transformer T1, and the output terminal of the third filter section is connected to the input terminal of the flicker removal section. The output terminal of the flicker removal section is used to connect to a lighting fixture.

[0012] In the driving circuit, the flicker removal section includes a flicker removal board. The pin V+BUS of the flicker removal board is connected to the output terminal of the third filter section. The pin V+ of the flicker removal board is used to connect to a lighting fixture.

[0013] This utility model also provides a PCB board, on which the driving circuits described above are printed.

[0014] This utility model also provides a square driving power supply, which uses any of the driving circuits described above to achieve working control.

[0015] The square driving power supply includes a detachably connected housing and a faceplate, with a mounting groove formed between the housing and the faceplate. A PCB board is disposed in the mounting groove, and the driving circuit is printed on the PCB board. A through groove is provided on the side of the faceplate, and a mounting ear is provided on the side of the housing.

[0016] Beneficial effects:

[0017] This invention provides a driving circuit that effectively receives and processes electrical energy from an external power supply device through an input processing unit, providing a stable power input for the entire driving circuit. The control unit connects the primary coil and auxiliary coil of transformer T1 to achieve effective control and regulation of electrical energy, ensuring the safe operation of the driving circuit. The flicker removal unit can effectively eliminate flicker in the electrical energy, protect lighting fixtures, extend their service life, and greatly improve lighting quality and user experience, providing a more comfortable and healthy lighting environment. Attached Figure Description

[0018] Figure 1 A circuit block diagram of the driving circuit provided by this utility model;

[0019] Figure 2 The circuit schematic diagram of the driving circuit provided by this utility model;

[0020] Figure 3 A circuit diagram of one embodiment of the flicker-reducing board provided by this utility model;

[0021] Figure 4 A schematic diagram of the square driving power supply provided by this utility model.

[0022] Explanation of main component symbols: 1-Input processing unit, 11-First filter section, 12-Rectifier section, 13-Second filter section, 2-Control unit, 21-Voltage divider section, 22-Voltage regulator section, 23-Clamping section, 24-Detection section, 25-Setting section, 26-Restart section, 3-Flicker removal unit, 31-Third filter section, 32-Flicker removal section, 4-Housing, 41-Mounting ear, 5-Face cover, 51-Through slot. Detailed Implementation

[0023] This utility model provides a driving circuit, a PCB board, and a square driving power supply. To make the purpose, technical solution, and effects of this utility model clearer and more explicit, the following describes this utility model in further detail with reference to the accompanying drawings and embodiments.

[0024] In the description of this utility model, it should be understood that the terms "installation" and "connection" should be interpreted broadly, and those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0025] Please see Figures 1 to 3This utility model provides a driving circuit, including an input processing unit 1, a control unit 2, a transformer T1, and a flicker removal unit 3. The input terminal of the input processing unit 1 is used to connect to an external power supply device. The output terminal of the input processing unit 1 is connected to the power input terminal of the control unit 2 and the primary coil of the transformer T1. The auxiliary coil of the transformer T1 is connected to the working power supply terminal of the control unit 2. The control terminal of the control unit 2 is connected to the primary coil of the transformer T1. The secondary coil of the transformer T1 is connected to the input terminal of the flicker removal unit 3. The output terminal of the flicker removal unit 3 is used to connect to a lighting fixture. The primary coil of the transformer T1 is inductively connected to its secondary coil and auxiliary coil.

[0026] This application discloses a driving circuit that effectively receives and processes electrical energy from an external power supply device through an input processing unit 1, providing a stable power input for the entire driving circuit; a control unit 2 connects the primary coil and auxiliary coil of a transformer T1 to achieve effective control and regulation of electrical energy, ensuring the safe operation of the driving circuit; and a flicker removal unit 3 effectively removes flickering from electrical energy, protecting lighting fixtures, extending their service life, and greatly improving lighting quality and user experience, thus providing a more comfortable and healthy lighting environment.

[0027] In this embodiment, the external power supply device is AC mains power.

[0028] Further, please refer to Figure 1 and Figure 2 The input processing unit 1 includes a first filter section 11, a rectifier section 12, and a second filter section 13. The input terminal of the first filter section 11 is used to connect to an external power supply device. The output terminal of the first filter section 11 is connected to the input terminal of the rectifier section 12. The output terminal of the rectifier section 12 is connected to the input terminal of the second filter section 13. The output terminal of the second filter section 13 is connected to the power input terminal of the control unit 2 and the primary coil of the transformer T1, respectively.

[0029] Further, please refer to Figure 1 and Figure 2 The first filter unit 11 includes an overload protection group and a filter group. The input terminal of the overload protection group is used to connect to an external power supply device, and the output terminal of the overload protection group is connected to the input terminal of the rectifier unit 12 through the filter group.

[0030] In this embodiment, please refer to Figure 2The overload protection group includes a fuse F1 and a varistor RV1; the filter group includes a first excitation coil LF1 and a first capacitor CX1; the rectifier section 12 includes a rectifier bridge DB1; and the second filter section 13 includes a third inductor L3, a first resistor R1, a first capacitor C1, a fourth resistor R4, a fifth resistor R5, a sixth resistor R6, and a third capacitor CX3. One end of the fuse F1, one end of the varistor RV1, and one end of the first excitation coil LF1 are respectively used to connect to an external power supply device. The other end of the fuse F1 is connected to the other end of the varistor RV1 and one end of the first excitation coil LF1. The other end of the first excitation coil LF1 is connected to the input terminal of the rectifier bridge DB1 through the first capacitor CX1. The output terminal of the rectifier bridge BD1 is connected to one end of the third inductor L3, one end of the first resistor R1, and one end of the first capacitor C1. The other end of the third inductor L3, the other end of the first resistor R1, one end of the second capacitor CX2, one end of the fourth resistor R4, one end of the fifth resistor R5, and one end of the sixth resistor R6 are respectively connected to the primary coil of the transformer T1 and the VIN pin of the control chip IC1. The other end of the fourth resistor R4, the other end of the fifth resistor R5, and the other end of the sixth resistor R6 are respectively connected to one end of the third capacitor CX3. The other end of the first capacitor C1, the other end of the second capacitor CX2, and the other end of the third capacitor CX3 are respectively grounded.

[0031] In this embodiment, firstly, the power supplied by the external power supply device is preliminarily filtered by the first filter unit 11, which not only effectively removes high-frequency noise and interference in the power supply, but also significantly improves the purity of the power supply, laying a solid foundation for the stable operation of the subsequent circuit. In the overload protection group included in the first filter unit 11, the fuse F1 and the varistor RV1 can respond quickly when the circuit is overloaded, and cut off the power supply in time to prevent the circuit from being damaged due to overload. Secondly, the rectifier unit 12 adopts a high-performance rectifier bridge DB1 to efficiently convert AC power into DC power, providing a continuous and stable DC power supply for the control chip IC1 and the transformer T1. Furthermore, the second filter unit 13 performs more refined filtering on the rectified DC power, further removing ripple and residual AC components in the DC power, ensuring that the control chip IC1 and the transformer T1 can receive an extremely pure and stable DC power supply.

[0032] Further, please refer to Figure 1 and Figure 2The control unit 2 includes a control chip IC1, a voltage divider 21, a voltage regulator 22, and a clamping unit 23. The output terminal of the input processing unit 1 is connected to the VIN pin of the control chip IC1 through the voltage divider 21. The auxiliary coil is connected to the VCC pin of the control chip IC1 through the voltage regulator 22. The DRAIN pin of the control chip IC1 is connected to the primary coil of the transformer T1 through the clamping unit 23.

[0033] Further, please refer to Figure 1 and Figure 2 The control unit 2 further includes a detection unit 24, a setting unit 25, and a restart unit 26. The detection unit 24 is connected to the CS pin of the control chip IC1, the setting unit 25 is connected to the SET pin of the control chip IC1, and the restart unit 26 is connected to the RTH pin of the control chip IC1.

[0034] In this embodiment, the control chip IC1 is model JW1807CH; the voltage divider 21 includes a third resistor R3 and a sixteenth resistor R16; the voltage regulator 22 includes a second diode D2, a twelfth resistor R12, a first filter capacitor EC1, a tenth capacitor C10, a first field-effect transistor Q1, a twenty-first resistor R21, and a fifth Zener diode ZD5; ​​the clamping part 23 includes a nineteenth resistor R19, a fifteenth resistor R15, a first diode D1, a ninth resistor R9, and a second capacitor C2; the detection part 24 includes an eighth resistor R8, a tenth resistor R10, and an eleventh resistor R11; and the setting part 25 includes... The second resistor R2, the restart unit 26 includes a seventh resistor R7; the auxiliary coil of the transformer T1 is connected to the positive terminal of the second diode D2, the negative terminal of the second diode D2 is connected to one end of the seventh resistor R7, the other end of the seventh resistor R7 is connected to the drain of the first field-effect transistor Q1, one end of the second eleventh resistor R21, and the positive terminal of the first filter capacitor EC1, the gate of the first field-effect transistor Q1 is connected to the negative terminal of the fifth Zener diode ZD5 and the other end of the second eleventh resistor R21, the source of the first field-effect transistor Q1 and one end of the tenth capacitor C10 are respectively... The ninth resistor R9 and the second capacitor C2 are connected to the primary coil of the transformer T1, respectively. The other ends of the ninth resistor R9 and the second capacitor C2 are connected to the cathode of the first diode D1. The anode of the first diode D1 is connected to the DRAIN pin of the control chip IC1 through the fifteenth resistor R15 and the nineteenth resistor R19. The fifteenth resistor R15 and the nineteenth resistor R19 are also connected in series with the primary coil of the transformer T1. One end of the eighth resistor R8 and the tenth resistor R19 are connected to the primary coil of the transformer T1. One end of resistor R10 and one end of the eleventh resistor R11 are respectively connected to pin CS of the control chip IC1; one end of the second resistor R2 is connected to pin SET of the control chip IC1, and one end of the seventh resistor R7 is connected to pin RTH of the control chip IC1; the other ends of the second resistor R2, the seventh resistor R7, the eighth resistor R8, the tenth resistor R10, the eleventh resistor R11, the negative terminal of the first filter capacitor EC1, the other end of the tenth capacitor C10, and the positive terminal of the fifth Zener diode ZD5 are respectively grounded.

[0035] In this embodiment, the control unit 2 integrates the control chip IC1 and numerous key components such as resistors, capacitors, diodes, and Zener diodes into a compact circuit module. This not only significantly reduces the area occupied by the circuit board but also substantially lowers manufacturing costs. This highly integrated design not only enhances the overall aesthetics of the product but also effectively reduces the overall size of the drive power supply, significantly improving its performance and thus greatly expanding the applicability of the drive power supply, further enhancing the product's reliability and market competitiveness. Specifically, the control unit 2 includes a voltage divider 21, a voltage regulator 22, and a clamping unit 23. These parts work together to precisely adjust the input voltage, ensuring that the control chip IC1 always operates within a safe and stable voltage range. Furthermore, the third resistor R3 and the sixteenth resistor R16 of the voltage divider 21 precisely divide the voltage, while the second diode D2, the twelfth resistor R12, and other components of the voltage regulator 22 provide a stable voltage output, and the clamping unit... The nineteenth resistor R19 and the fifteenth resistor R15 of section 23 effectively prevent voltage spikes. This multi-level voltage regulation mechanism greatly improves the circuit's anti-interference capability and stability, avoiding various circuit faults caused by voltage fluctuations. In addition, the control unit 2 is equipped with a detection unit 24, a setting unit 25, and a restart unit 26, enabling the drive circuit to have real-time monitoring, flexible setting, and fast restart capabilities. The detection unit 24 is connected to the CS pin of the control chip IC1 through the eighth resistor R8, the tenth resistor R10, and the eleventh resistor R11, enabling real-time monitoring of the circuit's operating status. The setting unit 25 is connected to the SET pin through the second resistor R2, allowing users to easily set parameters according to actual needs. The restart unit 26 is connected to the RTH pin through the seventh resistor R7, enabling rapid restart and restoration of normal operation when the circuit malfunctions. This highly flexible control function greatly improves the adaptability and ease of operation of the drive circuit.

[0036] Further, please refer to Figures 1 to 3 The flicker removal unit 3 includes a third filter section 31 and a flicker removal section 32. The input terminal of the third filter section 31 is connected to the secondary coil of the transformer T1, and the output terminal of the third filter section 31 is connected to the input terminal of the flicker removal section 32. The output terminal of the flicker removal section 32 is used to connect to a lighting fixture.

[0037] In this embodiment, please refer to Figure 2The third filter section 31 includes a third diode D3, a thirteenth resistor R13, a third capacitor C3, and a second filter capacitor EC2. The positive terminal of the third diode D3 and one end of the thirteenth resistor R13 are respectively connected to the secondary coil of the transformer T1. The other end of the thirteenth resistor R13 is connected to one end of the third capacitor C3. The other end of the third capacitor C3 and the negative terminal of the third diode D3 are respectively connected to the positive terminal of the second filter capacitor EC2 and the V+BUS pin of the anti-flicker board. The negative terminal of the second filter capacitor EC2 is grounded.

[0038] In this embodiment, the third filter unit 31 filters the voltage output from the secondary coil of transformer T1, removes high-frequency noise and interference, and then transmits the filtered voltage to the anti-flicker board.

[0039] Further, please refer to Figure 2 and Figure 3 The flicker removal unit 32 includes a flicker removal board, the pin V+BUS of which is connected to the output terminal of the third filter unit 31, and the pin V+ of which is used to connect to a lighting fixture.

[0040] In one embodiment, see Figure 3 The flicker-reducing board includes a second field-effect transistor Q2, an eighth Zener diode D8, an eighth capacitor C8, a twentieth resistor R20, a fifth diode D5, a sixth diode D6, a second Zener diode ZD2, a third Zener diode ZD3, and a fourth diode D4. The positive terminal of the third Zener diode ZD3, the positive terminal of the fifth diode D5, and the drain of the second field-effect transistor Q2 are respectively connected to the output terminal of the third filter section 31. The negative terminal of the third Zener diode ZD3 is connected to the negative terminal of the fourth diode D4. The negative terminal of the fifth diode D5 is connected to the negative terminal of the sixth diode D6. The positive terminal of the diode and the negative terminal of the second Zener diode ZD2 are connected. The positive terminal of the fourth diode D4, the negative terminal of the sixth diode D6, and the positive terminal of the second Zener diode ZD2 are respectively connected to one end of the second twentieth resistor R20. The gate of the second field-effect transistor Q2 is connected to the negative terminal of the eighth Zener diode D8 and the other end of the second twentieth resistor R20. The source of the second field-effect transistor Q2, the positive terminal of the eighth diode D8, and one end of the eighth capacitor C8 are respectively used to connect to lighting fixtures. The other end of the eighth capacitor C8 is grounded through several parallel capacitors.

[0041] In this embodiment, the main function of the flicker-reducing board is to reduce or eliminate the flicker phenomenon generated by the lighting fixture during operation, thereby providing a more stable and comfortable lighting environment. In the circuit structure of the flicker-reducing board, firstly, components such as the third Zener diode ZD3, the fifth diode D5, and the second MOSFET Q2 work together to precisely regulate the input voltage, effectively absorbing and stabilizing power supply voltage fluctuations to ensure stable output voltage. This multi-stage voltage regulation and protection mechanism effectively suppresses voltage fluctuations, thereby reducing flicker caused by voltage instability. Secondly, the flicker-reducing board also has overvoltage protection functionality. When the power supply voltage is too high, components such as the eighth Zener diode D8 in the circuit can respond quickly to limit the voltage within a safe range, thereby protecting the lighting fixtures from damage. The overvoltage protection function not only extends the service life of the lamps but also greatly improves the safety of the driver power supply and lighting fixtures during operation, avoiding equipment damage or fire risks caused by excessive voltage. In addition, the circuit structure of the flicker-eliminating board is also highly efficient. For example, the design of the eighth capacitor C8 can not only smooth voltage fluctuations but also effectively reduce power loss and improve energy utilization efficiency, enabling the entire driver power supply to operate efficiently while reducing operating costs.

[0042] This utility model also provides a PCB board, on which the driving circuits described above are printed.

[0043] Please see Figure 4 The present invention also provides a square driving power supply, wherein the square driving power supply uses any of the driving circuits described above to achieve working control.

[0044] Further, please refer to Figure 4 The square drive power supply includes a detachably connected housing 4 and a face cover 5. A mounting groove is formed between the housing 4 and the face cover 5. A PCB board is disposed in the mounting groove, and the drive circuit is printed on the PCB board. A through groove 51 is provided on the side of the face cover 5, and a mounting ear 41 is provided on the side of the housing 4.

[0045] In this embodiment, the housing 4 is snapped into the faceplate 5, and the mounting ear 41 is integrally formed with the housing 4.

[0046] In this embodiment, the detachable connection design between the housing 4 and the cover 5 significantly improves the convenience of maintenance. When it is necessary to inspect or replace the internal circuit, the user can easily remove the cover 5 to directly access the PCB board, thereby achieving rapid maintenance, effectively reducing the technical difficulty of repair, and reducing the time and cost required for repair, thus improving maintenance efficiency. Secondly, the through slot 51 on the side of the cover 5 not only effectively solves the heat dissipation problem of the power supply, but also facilitates the user's disassembly and assembly of the cover 5. Specifically, the through slot 51 allows the heat generated by the drive power supply during operation to be dissipated quickly, preventing the internal temperature from becoming too high, thereby extending the service life of the power supply and improving the working efficiency and safety of the equipment. Finally, the mounting ears 41 provided on the side of the housing 4 provide convenience for the installation and fixing of the drive power supply. The user can easily align and fix the mounting ears 41 of the drive power supply with the corresponding positions on the equipment or rack without additional fixing tools or complicated operations, simplifying the installation and disassembly process, improving the stability and safety of the drive power supply in the equipment, and ensuring the reliable operation of the drive power supply in various working environments.

[0047] It is understood that those skilled in the art can make equivalent substitutions or changes based on the technical solution and inventive concept of this utility model, and all such substitutions or changes should fall within the protection scope of this utility model.

Claims

1. A driving circuit, characterized in that, The system includes an input processing unit, a control unit, a transformer T1, and a flicker removal unit. The input terminal of the input processing unit is used to connect to an external power supply device. The output terminal of the input processing unit is connected to the power input terminal of the control unit and the primary coil of the transformer T1. The auxiliary coil of the transformer T1 is connected to the operating power supply terminal of the control unit. The control terminal of the control unit is connected to the primary coil of the transformer T1. The secondary coil of the transformer T1 is connected to the input terminal of the flicker removal unit. The output terminal of the flicker removal unit is used to connect to a lighting fixture. The primary coil of the transformer T1 is inductively connected to its secondary coil and auxiliary coil.

2. The driving circuit according to claim 1, characterized in that, The input processing unit includes a first filter section, a rectifier section, and a second filter section. The input terminal of the first filter section is used to connect to an external power supply device. The output terminal of the first filter section is connected to the input terminal of the rectifier section. The output terminal of the rectifier section is connected to the input terminal of the second filter section. The output terminal of the second filter section is connected to the power input terminal of the control unit and the primary coil of the transformer T1, respectively.

3. The driving circuit according to claim 2, characterized in that, The first filtering unit includes an overload protection group and a filtering group. The input terminal of the overload protection group is used to connect to an external power supply device, and the output terminal of the overload protection group is connected to the input terminal of the rectifier unit through the filtering group.

4. The driving circuit according to claim 1, characterized in that, The control unit includes a control chip IC1, a voltage divider, a voltage regulator, and a clamping unit. The output terminal of the input processing unit is connected to the VIN pin of the control chip IC1 through the voltage divider. The auxiliary coil is connected to the VCC pin of the control chip IC1 through the voltage regulator. The DRAIN pin of the control chip IC1 is connected to the primary coil of the transformer T1 through the clamping unit.

5. A driving circuit according to claim 4, characterized in that, The control unit further includes a detection unit, a setting unit, and a restart unit. The detection unit is connected to pin CS of the control chip IC1, the setting unit is connected to pin SET of the control chip IC1, and the restart unit is connected to pin RTH of the control chip IC1.

6. A driving circuit according to claim 1, characterized in that, The flicker removal unit includes a third filter section and a flicker removal section. The input terminal of the third filter section is connected to the secondary coil of the transformer T1, and the output terminal of the third filter section is connected to the input terminal of the flicker removal section. The output terminal of the flicker removal section is used to connect to a lighting fixture.

7. A driving circuit according to claim 6, characterized in that, The flicker removal unit includes a flicker removal board, the V+BUS pin of which is connected to the output terminal of the third filter unit, and the V+ pin of the flicker removal board is used to connect to a lighting fixture.

8. A PCB board, characterized in that, The PCB board is printed with the driving circuit as described in any one of claims 1-7.

9. A square driving power supply, characterized in that, The square drive power supply uses the drive circuit described in any one of claims 1-7 to achieve operation control.

10. A square driving power supply according to claim 9, characterized in that, The device includes a detachably connected housing and a faceplate, with a mounting groove formed between the housing and the faceplate. A PCB board is disposed in the mounting groove, and the driving circuit is printed on the PCB board. A through groove is provided on the side of the faceplate, and a mounting ear is provided on the side of the housing.

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