Stroboflash-removing circuit, PCB and driving power supply

Abstract

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

Description

TECHNICAL FIELD

[0001] The utility model relates to drive circuit technical field, especially relate to a frequency flicker removing circuit, PCB board and driving power supply. BACKGROUND

[0002] In the field of traditional power supply circuit design, the output voltage after rectification and filtering processing will still be accompanied by a certain degree of voltage ripple. The existence of voltage ripple will have many influences on the operation of the lamp connected to the driving power supply. First, voltage ripple may cause the brightness of the lamp light source to be unstable, resulting in flickering phenomenon, affecting the lighting effect and the visual comfort of the user. Second, voltage ripple may also cause abnormal heating of the internal circuit of the lamp, accelerate the aging of components, and shorten the service life of the lamp. In particular, for precision electronic equipment such as LED lamps, the influence of voltage ripple is more significant. Specifically, voltage ripple may cause the performance of LED chips to decline, the color temperature to shift, and even cause the lamp to malfunction.

[0003] It can be seen that the prior art needs to be improved and improved. UTILITY MODEL CONTENT

[0004] In view of the above shortcomings of the prior art, the purpose of the utility model is to provide a frequency flicker removing circuit, which can reduce the frequency flicker effect of the lighting lamp by configuring a frequency flicker removing unit, so as to improve the lighting quality and the user's experience.

[0005] In order to achieve the above purpose, the utility model adopts the following technical scheme:

[0006] A frequency flicker removing circuit, comprising an input processing unit, a control unit, a transformer T1, a frequency flicker removing unit and an output processing unit. The input end of the input processing unit is used to connect 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 the primary coil of the transformer T1 respectively. The auxiliary coil of the transformer T1 is connected with the working power supply end of the control unit. The control end of the control unit is connected with the primary coil of the transformer T1. The secondary coil of the transformer T1 is connected with the input end of the output processing unit. The output end of the output processing unit is used to connect a lighting lamp. The frequency flicker removing unit is connected with the output processing unit. The primary coil of the transformer T1 is inductively connected with its secondary coil and auxiliary coil respectively.

[0007] The input processing unit comprises a first filter part, a rectifier part and a second filter part, the input end of the first filter part is used for connecting an external power supply device, the output end of the first filter part is connected with the input end of the rectifier part, the output end of the rectifier part is connected with the input end of the second filter part, and the output end of the second filter part is connected with the power input end of the control unit and the primary coil of the transformer T1 respectively.

[0008] The first filter part comprises an overload protection group and a first filter group, the input end of the overload protection group is used for connecting an external power supply device, and the output end of the overload protection group is connected with the input end of the rectifier part through the first filter group.

[0009] The second filter part comprises a second filter group, an overvoltage protection group and a voltage stabilizing group, the input end of the second filter group is connected with the output end of the rectifier part, the output end of the second filter group is connected with the input end of the overvoltage protection group and the input end of the voltage stabilizing group, and the output end of the voltage stabilizing group is connected with the power input end of the control unit and the primary coil of the transformer T1 respectively.

[0010] The control unit comprises a control chip IC1, a voltage dividing part, a voltage stabilizing part and a clamping part, the output end of the input processing unit is connected with the pin VIN of the control chip IC1 through the voltage dividing part, the auxiliary coil is connected with the pin VCC of the control chip IC1 through the voltage stabilizing part, and the pin DRAIN of the control chip IC1 is connected with the primary coil of the transformer T1 through the clamping part.

[0011] The control unit further comprises a detection part, a setting part and a restart part, the detection part is connected with the pin CS of the control chip IC1, the setting part is connected with the pin SET of the control chip IC1, and the restart part is connected with the pin RTH of the control chip IC1.

[0012] The output processing unit comprises a third filter part and a fourth filter part, the input end of the third filter part is connected with the secondary coil of the transformer T1, the output end of the third filter part is connected with the input end of the anti-flicker unit, the output end of the anti-flicker unit is connected with the input end of the fourth filter part, and the output end of the fourth filter part is used for connecting a lighting lamp.

[0013] The frequency flash removing circuit, the frequency flash removing unit comprises a first field effect transistor Q1, a first voltage stabilizing tube ZD1, an eighth capacitor C8, a seventeenth resistor R17, a fifth diode D5, a fourth diode D4, a second voltage stabilizing tube ZD2, a third voltage stabilizing tube ZD3 and a fourth filter capacitor EC4.

[0014] The utility model further provides a PCB board, the PCB board is printed with the frequency flash removing circuit of any one described above.

[0015] The utility model further provides a driving power supply, the driving power supply adopts the frequency flash removing circuit of any one described above and realizes work control.

[0016] Beneficial effects:

[0017] The utility model provides a kind of frequency flash removing circuit, by input processing unit effective reception and processing the electric energy of external power supply device, provide stable power input for entire frequency flash removing circuit;Control unit is connected with the primary coil and auxiliary coil of transformer T1, realizes the effective control and regulation of electric energy, ensure the safe operation of frequency flash removing circuit;Output processing unit is connected with frequency flash removing unit, frequency flash removing unit can effectively remove the frequency flash phenomenon in electric energy, to improve the stability of the electric signal that output processing unit exports, reach the purpose of protecting lighting fixture, prolong its service life;By setting frequency flash removing unit, can provide more comfortable and healthy lighting environment for user, greatly improve lighting quality and user's use experience. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 The utility model provides the circuit block diagram of frequency flash removing circuit;

[0019] Figure 2 The utility model provides the circuit principle diagram of frequency flash removing circuit.

[0020] Main element symbol explanation: 1-input processing unit, 11-first filter part, 12-rectifier part, 13-second filter part, 2-control unit, 21-voltage divider part, 22-voltage stabilizer part, 23-clamp part, 24-detection part, 25-setting part, 26-restart part, 3-flicker removal unit, 4-output processing unit, 41-third filter part, 42-fourth filter part. DETAILED DESCRIPTION

[0021] The utility model provides a kind of flicker removal circuit, PCB and driving power supply, to make the purpose, technical scheme and effect of the utility model more clear, definite, the following with reference to drawing and example of raising are further detailed to the utility model.

[0022] In the description of the utility model, it needs to be understood that the terms "mounting", "connection" and the like should be broadly understood, and the specific meanings of the above terms in the utility model can be understood according to specific circumstances for ordinary skilled persons in the art.

[0023] Please refer to Figure 1 And Figure 2 The utility model provides a kind of flicker removal circuit, including input processing unit 1, control unit 2, transformer T1, flicker removal unit 3 and output processing unit 4;The input end of input processing unit 1 is used to connect external power supply device, the output end of input processing unit 1 is connected with the power input end of control unit 2 and the primary coil of transformer T1 respectively, the auxiliary coil of transformer T1 is connected with the operating power supply end of control unit 2, the control end of control unit 2 is connected with the primary coil of transformer T1, the secondary coil of transformer T1 is connected with the input end of output processing unit 4, the output end of output processing unit 4 is used to connect lighting fixture;Flicker removal unit 3 is connected with output processing unit 4, and the primary coil of transformer T1 is inductively connected with its secondary coil and auxiliary coil respectively.

[0024] The application discloses a kind of driving circuit, by input processing unit 1 effectively receiving and processing the electric energy of external power supply device, to provide stable power input for entire flicker removal circuit;Control unit 2 is connected by the primary coil and auxiliary coil of transformer T1, realizes the effective control and regulation of electric energy, ensures the safe operation of flicker removal circuit;Output processing unit 4 is connected with flicker removal unit 3, and flicker removal unit 3 can effectively remove the flicker phenomenon in electric energy, to improve the stability of electric signal output by output processing unit 4, reach the purpose of protecting lighting fixture, prolong its service life;By setting flicker removal unit 3, more comfortable and healthy lighting environment can be provided for user, greatly improve lighting quality and user's use experience.

[0025] In the embodiment, the external power supply device is a commercial power supply.

[0026] Further, referring to Figure 1 and Figure 2 , the input processing unit 1 comprises a first filter part 11, a rectifier part 12 and a second filter part 13, the input end of the first filter part 11 is used to connect an external power supply device, the output end of the first filter part 11 is connected with the input end of the rectifier part 12, the output end of the rectifier part 12 is connected with the input end of the second filter part 13, the output end of the second filter part 13 is respectively connected with the power input end of the control unit 2 and the primary coil of the transformer T1.

[0027] Further, referring to Figure 1 and Figure 2 , the first filter part 11 comprises an overload protection group and a first filter group, the input end of the overload protection group is used to connect an external power supply device, the output end of the overload protection group is connected with the input end of the rectifier part 12 through the first filter group.

[0028] Further, referring to Figure 1 and Figure 2 , the second filter part 13 comprises a second filter group, an overvoltage protection group and a voltage stabilizing group, the input end of the second filter group is connected with the output end of the rectifier part 12, the output end of the second filter group is connected with the input end of the overvoltage protection group and the input end of the voltage stabilizing group, the output end of the voltage stabilizing group is respectively connected with the power input end of the control unit 2 and the primary coil of the transformer T1.

[0029] In the embodiment, referring to Figure 2The overload protection group includes a fuse F1 and a pressure sensitive resistor RV1, the filter group includes a first inductor L1, a first excitation coil LF1 and a first capacitor CB1, the rectifying portion 12 includes a rectifying bridge DB1, the second filter group includes a second inductor L2, a first resistor R1, a first capacitor CB1, the overvoltage protection group includes a second pressure sensitive resistor RV2 and a second capacitor CB2, and the voltage stabilizing group includes a fifteenth resistor R15, a fifth resistor R5, a sixth resistor R6, a seventh resistor R7 and a third capacitor CB3; one end of the fuse F1, the pressure sensitive resistor RV1 and one end of the first inductor L1 are used for connecting external power supply devices, the other end of the fuse F1 is connected with one end of the first inductor L1, the other end of the first inductor L1 is connected with the input end of the rectifying bridge DB1 through the first excitation coil and the first capacitor CB1; the output end of the rectifying bridge DB1 is connected with one end of the second inductor L2, one end of the first resistor R1 and one end of the first capacitor CB1 respectively, the other end of the second inductor L2, the other end of the first resistor R1, one end of the second pressure sensitive resistor RV2, one end of the second capacitor CB2, one end of the fifteenth resistor R15, one end of the fifth resistor R5, one end of the sixth resistor R6 and one end of the seventh resistor R7 are connected with the primary coil of the transformer T1 and the pin VIN of the control chip IC1 respectively, the other end of the fifteenth resistor R15, the other end of the fifth resistor R5, the other end of the sixth resistor R6 and the other end of the seventh resistor R7 are connected with one end of the third capacitor CB3 respectively, and the other end of the first capacitor CB1, the other end of the second capacitor CB2, the other end of the second pressure sensitive resistor RV2 and the other end of the third capacitor CB3 are grounded respectively.

[0030] In the embodiment, firstly, the power supply provided by the external power supply device is subjected to preliminary filtering processing by the first filtering part 11, not only effectively removing the high-frequency noise and interference in the power supply, but also significantly improving the purity of the power supply, laying a solid foundation for the stable operation of the subsequent circuit; among the overload protection group included in the first filtering part 11, the fuse F1 and the first pressure-sensitive resistor RV1 can quickly respond when the circuit is overloaded, and timely cut off the power supply to prevent the circuit from being damaged due to overload; secondly, the rectifying part 12 adopts a high-performance rectifier bridge DB1 to efficiently convert alternating current into direct current, providing a continuous and stable direct current power supply for the control chip IC1 and the transformer T1; thirdly, the second filtering part 13 performs more refined filtering processing on the rectified direct current, further removing the ripple and residual alternating components in the direct current, ensuring that the control chip IC1 and the transformer T1 can receive extremely pure and stable direct current power supply; and the overvoltage protection group included in the second filtering part 13 effectively deals with the overvoltage situation that may occur in the circuit through the synergistic effect of the second pressure-sensitive resistor RV2 and the second capacitor CB2, protecting the control chip IC1 and the transformer T1 from being damaged.

[0031] Further, please refer to Figure 1 and Figure 2 , the control unit 2 includes a control chip IC1, a voltage dividing part 21, a voltage stabilizing part 22, and a clamping part 23, the output end of the input processing unit 1 is connected with the pin VIN of the control chip IC1 through the voltage dividing part 21, the auxiliary coil is connected with the pin VCC of the control chip IC1 through the voltage stabilizing part 22, and the pin DRAIN of the control chip IC1 is connected with the primary coil of the transformer T1 through the clamping part 23.

[0032] Further, please refer to Figure 1 and Figure 2 , the control unit 2 further includes a detection part 24, a setting part 25, and a restart part 26, the detection part 24 is connected with the pin CS of the control chip IC1, the setting part 25 is connected with the pin SET of the control chip IC1, and the restart part 26 is connected with the pin RTH of the control chip IC1.

[0033] In the embodiment, the model of the control chip IC1 is JW1807CH; the voltage dividing part 21 comprises a third resistor R3 and a fourth resistor R4; the voltage stabilizing part 22 comprises a second diode D2, a twelfth resistor R12, a first filter capacitor EC1, a sixth capacitor C6, a second field effect transistor Q2, an eighteenth resistor R18 and a fifth Zener diode ZD5; the clamping part 23 comprises a twentieth resistor R20, a sixteenth resistor R16, a first diode D1, a ninth resistor R9 and a first capacitor C1; the detecting part 24 comprises a tenth resistor R10 and an eleventh resistor R11; the setting part 25 comprises the fourth resistor R4; the restarting part 26 comprises an eighth resistor R8; the auxiliary coil of the transformer T1 is connected with the anode of the second diode D2; the cathode of the second diode D2 is connected with one end of the twelfth resistor R12; the other end of the twelfth resistor R12 is connected with the drain of the second field effect transistor Q2, one end of the eighteenth resistor R18 and the anode of the first filter capacitor EC1 respectively; the gate of the second field effect transistor Q2 is connected with the negative electrode of the fifth Zener diode ZD5 and the other end of the eighteenth resistor R18 respectively; the source of the second field effect transistor Q2 and one end of the sixth capacitor C6 are connected with the pin VCC of the control chip IC1 respectively; one end of the ninth resistor R9 and one end of the first capacitor C1 are connected with the primary coil of the transformer T1 respectively; the other end of the ninth resistor R9 and the other end of the first capacitor C1 are connected with the cathode of the first diode D1 respectively; the anode of the first diode D1 is connected with the pin DRAIN of the control chip IC1 through the sixteenth resistor R16 and the twentieth resistor R20; the sixteenth resistor R16 and the twentieth resistor R20 are also connected with the primary coil of the transformer T1 in series; one end of the tenth resistor R10 and one end of the eleventh resistor R11 are connected with the pin CS of the control chip IC1 respectively; one end of the fourth resistor R4 is connected with the pin SET of the control chip IC1; one end of the eighth resistor R8 is connected with the pin RTH of the control chip IC1; the other end of the fourth resistor R4, the other end of the eighth resistor R8, the other end of the tenth resistor R10, the other end of the eleventh resistor R11, the cathode of the first filter capacitor EC1, the other end of the sixth capacitor C6 and the anode of the fifth Zener diode ZD5 are grounded respectively.

[0034] 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 board area 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 power supply, significantly improving its performance and thus greatly expanding the applicability of the power supply, further enhancing product 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 fourth resistor R4 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. The twentieth resistor R20 and the sixteenth resistor R16 of the clamping 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 section 24, a setting section 25, and a restart section 26, enabling the drive circuit to have real-time monitoring, flexible setting, and fast restart capabilities. The detection section 24 is connected to the CS pin of the control chip IC1 through the tenth resistor R10 and the eleventh resistor R11, enabling real-time monitoring of the circuit's operating status. The setting section 25 is connected to the SET pin through the fourth resistor R4, allowing users to easily set parameters according to actual needs. The restart section 26 is connected to the RTH pin through the eighth resistor R8, 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.

[0035] Further, please refer to Figure 1 and Figure 2 The output processing unit 4 includes a third filter section 41 and a fourth filter section 42. The input terminal of the third filter section 41 is connected to the secondary coil of the transformer T1, the output terminal of the third filter section 41 is connected to the input terminal of the anti-flicker unit 3, the output terminal of the anti-flicker unit 3 is connected to the input terminal of the fourth filter section 42, and the output terminal of the fourth filter section 42 is used to connect to a lighting fixture.

[0036] In this embodiment, please refer to Figure 2The third filter section 41 includes a third diode D3, a thirteenth resistor R13, a second capacitor C2, a second filter capacitor EC2, and a fourth filter capacitor CE4. The fourth filter section 42 includes a third capacitor C3 and a third inductor L3. 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 second capacitor C2. The other end of the second capacitor C2, the negative terminal of the third diode D3, and the positive terminal of the second filter capacitor EC2 are respectively connected to the input terminal of the flicker removal unit 3. The negative terminal of the second filter capacitor EC2 is grounded. The output terminal of the flicker removal unit 3 is respectively connected to one end of the third capacitor C3 and one end of the third inductor L3. The other end of the third inductor L3 is used to connect to a lighting fixture. The other end of the third capacitor C3 is grounded.

[0037] In this embodiment, the main function of the third filter section 41 is to initially smooth and stabilize the AC power output from the secondary coil of transformer T1. Specifically, it is rectified by the third diode D3 to convert the AC power into DC power, and then filtered by the combination of the thirteenth resistor R13, the second capacitor C2, and the second filter capacitor EC2 to remove high-frequency noise and ripple, providing a stable DC power supply for the flicker removal unit 3. By setting the third filter section 41, the stability and reliability of the circuit can be effectively improved, and the impact of power fluctuations on the lighting fixtures can be reduced. The main function of the fourth filter section 42 is to further filter and smooth the signal output from the flicker removal unit 3 to ensure that the final signal output to the lighting fixtures is pure and stable. Specifically, it is formed by the combination of the third capacitor C3 and the third inductor L3 to form an LC filter circuit, further removing high-frequency noise and interference in the power supply. By setting the fourth filter section 42, the output quality of the circuit can be further improved, ensuring the stable operation of the lighting fixtures and extending their service life.

[0038] Further, please refer to Figure 2The flicker-reducing unit 3 includes a first field-effect transistor Q1, a first Zener diode ZD1, an eighth capacitor C8, a seventeenth resistor R17, a fifth diode D5, a fourth diode D4, a second Zener diode ZD2, a third Zener diode ZD3, and a fourth filter capacitor EC4. The positive terminal of the third Zener diode ZD3, the positive terminal of the fifth diode D5, and the drain of the first field-effect transistor Q1 are respectively connected to the output terminal of the third filter section 41. The negative terminal of the third Zener diode ZD3 is connected to the negative terminal of the fourth diode D4, and the negative terminal of the fifth diode D5 is connected to the output terminal of the filter section 41. The cathode of the second Zener diode ZD2 is connected to the cathode of the first Zener diode D4, and the anode of the fourth diode D4 and the anode of the second Zener diode ZD2 are respectively connected to one end of the seventeenth resistor R17; the gate of the first field-effect transistor Q1, the cathode of the first Zener diode ZD1, and the other end of the seventeenth resistor R17 are respectively connected to the anode of the fourth filter capacitor EC4; the source of the first field-effect transistor Q1 and the anode of the first Zener diode ZD1 are respectively connected to the input terminal of the fourth filter section 42; and the other end of the fourth filter capacitor EC4 is grounded.

[0039] In this embodiment, the flicker removal unit 3 is used to reduce or eliminate flicker in electronic display devices, thereby improving the user's visual experience and reducing visual fatigue. In the flicker removal unit 3, firstly, a network of Zener diodes is formed by multiple Zener diodes, enabling the flicker removal circuit to maintain a stable output voltage under various operating conditions, ensuring the reliability of the flicker removal circuit and effective suppression of flicker. Secondly, using the first field-effect transistor Q1 as the core control element, the circuit can quickly respond to changes in the input signal and adjust the output voltage in a timely manner, thereby achieving real-time control of flicker. Finally, filtering elements such as the fourth filter capacitor EC4 are configured to effectively filter out high-frequency noise and interference signals, improve the circuit's anti-interference capability, and optimize the quality of the output voltage.

[0040] This utility model also provides a PCB board, on which the frequency reduction lightning circuit described above is printed.

[0041] This utility model also provides a driving power supply, which uses any of the above-described frequency-de-lightning circuits for operation control.

[0042] 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 frequency-reducing lightning circuit, characterized in that, The system includes an input processing unit, a control unit, a transformer T1, a flicker removal unit, and an output processing unit. The input terminal of the input processing unit is connected to an external power supply. 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 output processing unit. The output terminal of the output processing unit is used to connect to a lighting fixture. The flicker removal unit is connected to the output processing unit. The primary coil of the transformer T1 is inductively connected to its secondary coil and auxiliary coil.

2. The frequency-reducing lightning 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 frequency-reducing lightning circuit according to claim 2, characterized in that, The first filtering unit includes an overload protection group and a first 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 first filtering group.

4. A frequency-reducing lightning circuit according to claim 2, characterized in that, The second filtering section includes a second filter group, an overvoltage protection group, and a voltage regulator group. The input terminal of the second filter group is connected to the output terminal of the rectifier section. The output terminal of the second filter group is connected to the input terminal of the overvoltage protection group and the input terminal of the voltage regulator group. The output terminal of the voltage regulator group is connected to the power input terminal of the control unit and the primary coil of the transformer T1, respectively.

5. A frequency-reducing lightning 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.

6. A frequency-reducing lightning circuit according to claim 5, 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.

7. A frequency-reducing lightning circuit according to claim 1, characterized in that, The output processing unit includes a third filter section and a fourth filter section. The input terminal of the third filter section is connected to the secondary coil of the transformer T1, the output terminal of the third filter section is connected to the input terminal of the anti-flicker unit, the output terminal of the anti-flicker unit is connected to the input terminal of the fourth filter section, and the output terminal of the fourth filter section is used to connect to a lighting fixture.

8. A frequency-reducing lightning circuit according to claim 7, characterized in that, The flicker-reducing unit includes a first field-effect transistor Q1, a first Zener diode ZD1, an eighth capacitor C8, a seventeenth resistor R17, a fifth diode D5, a fourth diode D4, a second Zener diode ZD2, a third Zener diode ZD3, and a fourth filter capacitor EC4. The positive terminal of the third Zener diode ZD3, the positive terminal of the fifth diode D5, and the drain of the first field-effect transistor Q1 are respectively connected to the output terminal of the third filter section. The negative terminal of the third Zener diode ZD3 is connected to the negative terminal of the fourth diode D4, and the negative terminal of the fifth diode D5 is connected to... The negative terminal of the second Zener diode ZD2 is connected to the ground. The positive terminals of the fourth diode D4 and the second Zener diode ZD2 are respectively connected to one end of the seventeenth resistor R17. The gate of the first field-effect transistor Q1, the negative terminal of the first Zener diode ZD1, and the other end of the seventeenth resistor R17 are respectively connected to the positive terminal of the fourth filter capacitor EC4. The source of the first field-effect transistor Q1 and the positive terminal of the first Zener diode ZD1 are respectively connected to the input terminal of the fourth filter section. The other end of the fourth filter capacitor EC4 is grounded.

9. A PCB board, characterized in that, The PCB board is printed with the frequency reduction lightning circuit as described in any one of claims 1-8.

10. A driving power supply, characterized in that, The drive power supply uses the frequency-de-frequency lightning circuit as described in any one of claims 1-8 to achieve operation control.

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