A dial code power multiplication color adjusting power supply circuit

Abstract

The application relates to the technical field of LED lighting circuits, in particular to a dial code power multiplication color adjusting power supply circuit which comprises a rectification filtering circuit, a parallel constant current circuit and a dial code color adjusting circuit. The rectification filtering circuit converts alternating current into stable direct current. The parallel constant current circuit adopts multiple groups of constant current driving units in parallel to realize the superposition of total power, solves the problem that a traditional power output mode is fixed and power cannot be flexibly adjusted according to brightness requirements, supports low-power energy saving and high-power mode flexible switching, the dial code color adjusting circuit controls the connection state of a first lamp group and a second lamp group, combines power adjustment of the parallel constant current circuit, realizes that a user can conveniently switch color temperature, and can simultaneously adapt to the lighting requirements of multiple scenes.

Description

Technical Field

[0001] This application relates to the field of LED lighting circuit technology, and in particular to a DIP switch power supply circuit for multiplying power and adjusting color. Background Technology

[0002] In the field of LED lighting, with the diversification of indoor lighting scenarios, such as homes, offices, and commercial spaces, users' functional requirements for lighting fixtures have expanded from basic on / off control to more diverse directions such as color temperature adjustment and power adaptation.

[0003] Among the related technologies, the research and development mainly focuses on the field of LED lighting drivers. Circuit design solutions have been developed, including lighting on / off control, usage mode switching, and remote control, which can meet the basic driving and some control requirements of lighting fixtures and provide technical support for the stable operation of LED lighting fixtures.

[0004] However, the main drawbacks of existing technologies are their limited control functions. On the one hand, they cannot easily switch between different color temperatures, making it difficult to adapt to the lighting atmosphere requirements of different scenarios. On the other hand, the power output mode is fixed, and it is impossible to flexibly adjust the power according to the brightness requirements, such as low-power energy-saving mode and high-power strong light mode, which cannot meet the diverse lighting scenario usage needs. Utility Model Content

[0005] To address the aforementioned issues, this application provides a DIP switch power-multiplying color-tuning power supply circuit.

[0006] The DIP switch power multiplier color tuning power supply circuit provided in this application adopts the following technical solution:

[0007] A DIP-controlled power supply circuit for color adjustment includes a rectifier and filter circuit, a parallel constant current circuit, and a DIP-controlled color adjustment circuit. The parallel constant current circuit includes several constant current driving units connected in parallel to form the parallel constant current circuit. The input terminal of the rectifier and filter circuit is connected to the parallel constant current circuit, and the output terminal of the parallel constant current circuit is connected to the DIP-controlled color adjustment circuit. The DIP-controlled color adjustment circuit includes a DIP switch, a first lamp group, and a second lamp group. Both the first lamp group and the second lamp group are connected to the DIP switch. The DIP switch has three positions. The DIP-controlled color adjustment circuit can change the connection state of the first lamp group and the second lamp group through the DIP switch K1. When the first lamp group works alone, the DIP switch K1 is in the first position; when the second lamp group works alone, the DIP switch K1 is in the second position; when the first lamp group and the second lamp group work in series, the DIP switch K1 is in the third position.

[0008] By adopting the above technical solution, several constant current drive units are connected in parallel to form a total power superposition, which solves the problem of the traditional fixed power output mode and the inability to flexibly adjust the power according to the brightness requirements. It supports low power energy saving mode with a single constant current drive unit in operation, and supports high power strong light mode with several constant current drive units connected in parallel to meet the diverse needs from basic lighting to high-intensity scenes. The DIP switch K1 controls the connection status of the first and second lamp groups through the first, second and third positions. Only the first lamp group works to achieve a specific color temperature, and only the second lamp group works to switch to another color temperature. The two lamp groups are connected in series and mixed to generate an intermediate color temperature. Combined with the power adjustment of the parallel constant current circuit, users can easily switch the color temperature and adapt to the lighting needs of multiple scenes.

[0009] Preferably, the DIP switch color adjustment circuit further includes LED beads and diodes. The LED beads include Y1, Yx, W1 and Wx, and the diodes include D5 and D6. Y1, Yx and D6 are connected in series to form a first lamp group, and W1, Wx and D5 are connected in series to form a second lamp group.

[0010] By adopting the above technical solution, the first lamp group includes Y1, Yx and D6 responsible for outputting a specific color temperature, and the second lamp group includes W1, Wx and D5 responsible for another color temperature. Diodes D6 and D5 are connected in series in both lamp groups. By utilizing the unidirectional conductivity of the diodes, the current path between the first lamp group and the second lamp group is isolated, and the unidirectional conductivity of the circuit is ensured when the DIP switch is switched.

[0011] Preferably, Y1 and Yx are warm-colored light, W1 and Wx are cool-colored light, Y1 and Yx output warm-colored light when working alone, W1 and Wx output cool-colored light when working alone, and the first lamp group and the second lamp group output neutral light when working in series.

[0012] By adopting the above technical solution, when Y1 and Yx work alone, they output warm and soft warm light, which can be adapted to cozy scenes such as rest and relaxation. When W1 and Wx work alone, they output bright and refreshing cool light, which can meet the needs of scenes requiring high definition such as work and reading. When the first light group and the second light group work in series, the warm light and cool light are superimposed and mixed to form neutral light, which balances the visual experience of warm and cool tones and is suitable for everyday general lighting scenes.

[0013] Preferably, one end of the first lamp group is connected to the positive electrode, the other end of the first lamp group is connected to pin 8 of the DIP switch, pin 7 of the DIP switch is connected to the negative electrode, the DIP switch shorts pins 1 and 2 of the DIP switch, and the shorting of pins 7 and 8 of the DIP switch forms the first gear position.

[0014] By adopting the above technical solution, the pins 1 and 2 of the DIP switch are shorted to achieve electrical connection, providing stable voltage logic support for the circuit. The current starts from the positive terminal, flows through the Y1 lamp, Yx lamp, and D6 in sequence, and then reaches the pin 8 of the DIP switch. It then flows to the negative terminal through the short-circuit path between the pin 7 and the pin 8 of the DIP switch, making the circuit of the first lamp group conductive and lit, outputting warm light. The branch of the second lamp group does not form a conductive circuit due to the DIP switch's position design, so it remains in the off state.

[0015] Preferably, one end of the second lamp group is connected to the positive electrode, and the other end of the second lamp group is connected to pin 5 of the DIP switch. The DIP switch shorts pins 2 and 4 of the DIP switch, and shorts pins 5 and 7 of the DIP switch to form the second gear position.

[0016] By adopting the above technical solution, pins 2 and 4 are shorted to provide a voltage reference for the circuit of the second lamp group W. On the other hand, the current starts from the positive terminal, flows through lamp W1, lamp Wx, and D5 in sequence, and then reaches pin 5 of the DIP switch. It then flows to the negative terminal through the short-circuit path between pin 5 and pin 7 of the DIP switch, so that the circuit of the second lamp group is connected and lit, outputting cool color light. The branch of the first lamp group does not form a conducting circuit due to the DIP switch position design, so it remains in the off state.

[0017] Preferably, the DIP switch shorts pins 2 and 3 of the DIP switch, and shorts pins 6 and 7 of the DIP switch to form the third position.

[0018] By adopting the above technical solution, when pins 2 and 3 of the DIP switch are shorted, and pins 6 and 7 of the DIP switch are shorted, the current flows in two independent branches. The first branch flows from the positive terminal through W1, Wx, D5, pin 5 of the DIP switch, pin 3 of the DIP switch, pin 2 of the DIP switch, and then through pin 6 of the DIP switch to pin 7 of the DIP switch back to the negative terminal. The second branch flows from the positive terminal through Y1, Yx, D5, pin 6 of the DIP switch, pin 7 of the DIP switch to the negative terminal. At this time, the first and second lamp groups light up simultaneously, outputting neutral light.

[0019] Preferably, the rectifier-filter circuit includes rectifier diodes, filter capacitor C1, and varistor RV1. The rectifier diodes include rectifier diodes D1, D2, D3, and D4. The rectifier diodes D3, filter capacitor C1, and varistor RV1 form a rectifier unit. The filter capacitor C1 is connected to the output terminal of the rectifier unit, and the varistor RV1 is connected in parallel to the input terminal of the rectifier unit.

[0020] By adopting the above technical solution, the rectifier unit composed of rectifier diodes D1, D2, D3, and D4 can convert the input AC power into pulsating DC power. The filter capacitor C1 is connected to the output terminal of the rectifier unit. The capacitor's charging and discharging characteristics are used to filter out the pulsating components in the voltage, making the output voltage smoother and more stable. The varistor RV1 is connected in parallel to the input terminal of the rectifier unit. When a surge peak occurs in the input voltage, the resistance of the varistor RV1 will rapidly decrease to discharge the instantaneous large current, thereby protecting the filter circuit and reducing high voltage damage.

[0021] Preferably, the constant current driving unit includes a constant current control chip U1, an inductor T1, a sampling resistor R3, and a sampling resistor R4. The sampling resistor R3 and the sampling resistor R4 are connected in parallel to form a sampling unit, and the sampling unit is connected to the CS terminal of the constant current control chip U1.

[0022] By adopting the above technical solution, the constant current control chip U1 monitors the voltage change of the sampling unit composed of parallel sampling resistors R3 and R4 in real time through the CS terminal, dynamically adjusts the energy storage and release process of inductor T1, and thus regulates the output current. When the load changes and causes current fluctuations, the sampling unit feeds back the voltage change to the CS terminal, triggering the closed-loop control mechanism inside the constant current control chip U1, adjusting the conduction state inside the constant current control chip U1 so that the output current quickly returns to the set value, providing a constant and precise drive current for the LED beads in the DIP switch color adjustment circuit.

[0023] In summary, this application includes at least one of the following beneficial technical effects:

[0024] 1. The parallel constant current circuit uses parallel constant current drive units to achieve total power superposition, which solves the problem of fixed power output in traditional circuits. It can achieve low power energy saving mode by operating a single constant current drive unit, or achieve high power strong light mode by connecting multiple constant current drive units in parallel, meeting the brightness requirements from basic to high intensity lighting. The DIP switch K1 controls the connection status of the first and second lamp groups through the first, second and third positions. Only the first lamp group works and outputs a specific color temperature, and only the second lamp group works and switches to another color temperature. The two groups work in series to generate an intermediate color temperature, which allows users to easily switch color temperature and brightness, and can adapt to the lighting needs of multiple scenarios.

[0025] 2. The rectifier unit, composed of rectifier diodes D1, D2, D3, and D4, converts the input AC power into pulsating DC power. The filter capacitor C1 is connected to the output terminal of the rectifier unit. It uses the charging and discharging characteristics of the capacitor to filter out the pulsating components in the voltage, making the output voltage smoother and more stable. The varistor RV1 is connected in parallel to the input terminal of the rectifier unit. When a surge peak occurs in the input voltage, the resistance of the varistor RV1 drops rapidly, discharging the instantaneous large current to protect the downstream circuit from high voltage damage, effectively improving the circuit's shock resistance and working stability.

[0026] 3. The constant current control chip U1 monitors the voltage change of the sampling unit composed of parallel sampling resistors R3 and R4 in real time through the CS terminal, and dynamically adjusts the energy storage and release process of inductor T1. When the load changes and causes current fluctuations, the sampling unit feeds back the voltage change to the CS terminal, triggering the closed-loop control mechanism inside the constant current control chip U1, adjusting the conduction state inside the constant current control chip U1 so that the output current quickly returns to the set value, providing a constant and precise drive current for the LED beads in the DIP switch color adjustment circuit. Attached Figure Description

[0027] Figure 1 This is a circuit diagram of an embodiment of this application.

[0028] Figure 2 This is a system block diagram of an embodiment of this application.

[0029] Figure 3 This is a schematic diagram of a rectifier and filter circuit according to an embodiment of this application.

[0030] Figure 4 This is a schematic diagram of a parallel constant current circuit according to an embodiment of this application.

[0031] Figure 5 This is a schematic diagram of the DIP switch color adjustment circuit according to an embodiment of this application.

[0032] Explanation of reference numerals in the attached diagram: 1. Rectifier and filter circuit; 2. Parallel constant current circuit; 3. DIP switch color adjustment circuit. Detailed Implementation

[0033] The following is in conjunction with the appendix Figure 1-5 This application will be described in further detail.

[0034] This application discloses a DIP switch power-multiplying color-tuning power supply circuit. This circuit is applied to a lighting fixture, which contains several LED beads and electronic components. The LED beads include two types: one emitting warm light and the other emitting cool light. Several of each type of LED bead are provided, arranged alternately.

[0035] Furthermore, refer to Figure 1 and Figure 2 A DIP switch power supply circuit for color adjustment includes a rectifier filter circuit 1, a parallel constant current circuit 2, and a DIP switch color adjustment circuit 3. The input terminal of the rectifier filter circuit 1 is connected to the parallel constant current circuit 2, the output terminal of the parallel constant current circuit 2 is connected to the DIP switch color adjustment circuit 3, and the LED beads are connected to the DIP switch color adjustment circuit 3.

[0036] Furthermore, this connection method allows the current to pass through rectification, filtering, constant current regulation, and color adjustment in sequence, ensuring that the power supply circuit can stably provide the lamps with appropriate power and color light, while meeting the lighting needs of different scenarios.

[0037] Reference Figure 3 Specifically, the rectifier-filter circuit 1 includes rectifier diodes, filter capacitor C1, and varistor RV1. The rectifier diodes include rectifier diodes D1, D2, D3, and D4, which together form a rectifier unit. This unit converts the input AC power into pulsating DC power. Filter capacitor C1 is connected to the output of the rectifier unit. The charging and discharging characteristics of filter capacitor C1 remove the pulsating components from the voltage, making the output voltage smoother and more stable. Varistor RV1 is connected in parallel to the input of the rectifier unit. When a surge peak occurs in the input voltage, the resistance of varistor RV1 drops rapidly, discharging the instantaneous large current to protect the subsequent circuits from high-voltage damage, thus protecting the rectifier-filter circuit 1, the subsequent constant current drive unit, and the DIP switch color adjustment circuit 3 from damage.

[0038] Reference Figure 4Specifically, the parallel constant current circuit 2 includes several constant current driving units, each with a power of 20W. In this embodiment, there are three constant current driving units, each including a constant current control chip U1, an inductor T1, a sampling resistor R3, and a sampling resistor R4. In this embodiment, the first group of constant current driving units includes a constant current control chip U1A, an inductor T1A, a sampling resistor R3A, and a sampling resistor R4A; the second group of constant current driving units includes a constant current control chip U1B, an inductor T1B, a sampling resistor R3B, and a sampling resistor R4B; and the third group of constant current driving units includes a constant current control chip U1C, an inductor T1C, a sampling resistor R3C, and a sampling resistor R4C.

[0039] Furthermore, three constant current drive units are connected in parallel to form a parallel constant current circuit 2. The total power of the three constant current drive units connected in parallel is superimposed. For example, the power of a single constant current drive unit is only 20W, the power of two constant current drive units connected in parallel is 40W, and the power of three constant current drive units connected in parallel is 60W. This solves the problem that the traditional power output mode is fixed and cannot flexibly adjust the power according to the brightness requirements. It supports low power energy saving mode with a single constant current drive unit, supports high power strong light mode with several constant current drive units connected in parallel, and meets the diverse needs from basic lighting to high-intensity scenes.

[0040] Meanwhile, the three constant current drive units are connected in parallel, and one or more constant current drive units can be turned on according to actual needs. When only a low power energy-saving mode is needed, only one constant current drive unit is turned on, and when a high power strong light mode is needed, multiple constant current drive units are turned on, thus realizing flexible power adjustment.

[0041] Furthermore, the constant current control chip U1 is used to monitor and adjust the current in the circuit in real time to ensure that the output current is constant. The inductor T1 plays the role of energy storage and release in the circuit. When the current changes, the inductor T1 can stabilize the current by storing and releasing energy. The sampling resistors R3 and R4 are connected in parallel to form a sampling unit. The sampling unit is connected to the CS terminal of the constant current control chip U1. The parallel connection of the sampling resistors R3 and R4 can reduce the total resistance of the sampling resistors and improve the sampling accuracy.

[0042] Meanwhile, when load changes cause current fluctuations, the sampling unit feeds back the voltage change to the CS terminal of the constant current control chip U1, triggering the closed-loop control mechanism inside the constant current control chip U1. This adjusts the conduction state inside the constant current control chip U1 so that the output current quickly returns to the set value. When the load resistance decreases, the current increases. The sampling unit detects the voltage increase and feeds it back to the constant current control chip U1. The constant current control chip U1 then adjusts its internal conduction state to reduce the current output.

[0043] Furthermore, the DIP switch color adjustment circuit 3 includes a DIP switch K1, a first lamp group, and a second lamp group. Both the first lamp group and the second lamp group are connected to the DIP switch. The DIP switch color adjustment circuit 3 can change the connection status between the first lamp group and the second lamp group through the DIP switch K1. The DIP switch K1 is a switch that can be manually adjusted, making it easy to operate.

[0044] Furthermore, the DIP switch color adjustment circuit 3 includes diodes, LED beads including Y1, Yx, W1 and Wx, diodes including diode D5 and diode D6, the first lamp group including Y1, Yx and diode D6, and the second lamp group including LED beads W1, Wx and diode D5. Y1 and Yx are usually warm-colored LED beads, and W1 and Wx are usually cool-colored LED beads. In this embodiment, Y1 and Yx are yellow light, and W1 and Wx are white light. Diodes D5 and D6 play a role in protecting and regulating the current, reducing the occurrence of reverse current damage to the LED beads.

[0045] Meanwhile, the DIP switch has three positions. When the first lamp group works alone, the DIP switch K1 is in the first position. At this time, the DIP switch connects one end of the first lamp group to the positive terminal, the other end of the first lamp group to pin 8 of the DIP switch, and pin 7 of the DIP switch to the negative terminal. The DIP switch shorts pins 1 and 2 of the DIP switch, and pins 7 and 8 of the DIP switch. In this way, the first lamp group is connected to the circuit and emits warm light with a specific color temperature. At this time, the color temperature is 3000k, and only one constant current drive unit is turned on, with a power of 20W.

[0046] Furthermore, when the second lamp group works independently, the DIP switch K1 is in the second position, one end of the second lamp group is connected to the positive terminal, and the other end of the second lamp group is connected to pin 5 of the DIP switch. The DIP switch shorts pins 2 and 4, and pins 5 and 7 of the DIP switch. The second lamp group is connected to the circuit and emits cool-colored light. At this time, the color temperature is 6000k, and only one set of constant current drive units is turned on, with a power of 20W.

[0047] In addition, when the first and second lamp groups are connected in series, the DIP switch K1 is in the third position. The DIP switch shorts pins 2 and 3, and pins 6 and 7 of the DIP switch. The first and second lamp groups are connected in series in the circuit and emit neutral light. At this time, the color temperature is 6000k, and the two constant current drive units are turned on, with a power of 40W.

[0048] This demonstrates that the DIP switch K1 controls the connection status of the first and second light groups through the first, second, and third positions. Only the first light group works to achieve a specific color temperature, and only the second light group works to switch to another color temperature. The two light groups are connected in series and mixed to generate an intermediate color temperature. Combined with the power adjustment of the parallel constant current circuit 2, users can easily switch between color temperature and brightness, while adapting to the lighting needs of multiple scenarios.

[0049] The implementation principle of a DIP switch power-multiplying color-tuning power supply circuit according to an embodiment of this application is as follows:

[0050] The rectifier and filter circuit converts AC power into stable DC power and provides protection for subsequent circuits. It consists of four rectifier diodes D1, D2, D3, and D4 forming a rectifier unit that converts the input AC power into pulsating DC power. A filter capacitor C1 is connected in parallel at the output of the rectifier unit. The filter capacitor C1 filters out the pulsating component through its charging and discharging characteristics, outputting a smooth DC voltage. A varistor RV1 is connected in parallel at the input of the rectifier unit. When a voltage surge occurs, the resistance of the varistor RV1 drops sharply, discharging the instantaneous large current and protecting the subsequent circuits from high voltage damage.

[0051] The parallel constant current circuit provides a total power output that can be stacked. It supports switching between low-power energy-saving mode and high-power strong light mode. Three independent 20W constant current drive units are connected in parallel, and the total power can be stacked as needed: 20W for a single unit, 40W for two units, and 60W for three units.

[0052] The constant current control chip U1 monitors the current in real time and adjusts the conduction state through closed-loop feedback to ensure a constant output current. The inductor T1 stores and releases energy to stabilize current fluctuations. The sampling resistors R3 and R4 are connected in series to reduce the total resistance and improve sampling accuracy. The current change is fed back to the CS terminal of the constant current control chip U1 to trigger adjustment to maintain the set current value.

[0053] The DIP switch color temperature adjustment circuit allows for switching the connection status of the lamp groups via a DIP switch to achieve color temperature adjustment. Combined with power adjustment, it meets diverse lighting needs. The first lamp group includes Y1, Yx, and D5, and the second lamp group includes W1, Wx, and D6. Y1 and Yx have a color temperature of 3000K yellow light, while W1 and Wx have a color temperature of 6000K white light. Diodes D5 and D6 prevent reverse current from damaging the LED beads.

[0054] When the DIP switch is set to the first position, only the first lamp group works, activating a single constant current drive unit with a power of 20W. When the DIP switch is set to the second position, only the second lamp group works, activating a single constant current drive unit with a power of 20W. When the DIP switch is set to the third position, the first and second lamp groups are connected in series to form a mixed neutral light with a color temperature of 4500K, activating dual constant current drive units with a power of 40W.

[0055] The low-power mode uses a single constant current drive unit and either the first or second lamp group, suitable for basic lighting. The high-power mode uses dual constant current drive units and the first and second lamp groups connected in series, suitable for scenarios requiring strong light or mixed color temperatures.

[0056] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A dial code power multiplying color adjusting power supply circuit, characterized by, The circuit includes a rectifier filter circuit (1), a parallel constant current circuit (2), and a DIP switch color adjustment circuit (3). The parallel constant current circuit (2) includes several constant current driving units, which are connected in parallel to form the parallel constant current circuit (2). The input terminal of the rectifier filter circuit (1) is connected to the parallel constant current circuit (2), and the output terminal of the parallel constant current circuit (2) is connected to the DIP switch color adjustment circuit (3). The DIP switch color adjustment circuit (3) includes a DIP switch, a first lamp group, and a second lamp group. Both the first lamp group and the second lamp group are connected to the DIP switch. The DIP switch has three positions. The DIP switch color adjustment circuit (3) can change the connection state of the first lamp group and the second lamp group through the DIP switch K1. When the first lamp group works alone, the DIP switch K1 is in the first position. When the second lamp group works alone, the DIP switch K1 is in the second position. When the first lamp group and the second lamp group work in series, the DIP switch K1 is in the third position.

2. The dial code power multiplying color adjusting power supply circuit according to claim 1, characterized in that, The DIP switch color adjustment circuit (3) also includes LED beads and diodes. The LED beads include Y1, Yx, W1 and Wx, and the diodes include D5 and D6. Y1, Yx and D6 are connected in series to form a first lamp group, and W1, Wx and D5 are connected in series to form a second lamp group.

3. The dial code power multiplying color adjusting power supply circuit according to claim 2, characterized in that, Y1 and Yx are warm-colored lights, W1 and Wx are cool-colored lights. When Y1 and Yx work alone, they output warm-colored lights, and when W1 and Wx work alone, they output cool-colored lights. When the first lamp group and the second lamp group work in series, they output neutral light.

4. The dial code power multiplying color adjusting power supply circuit according to claim 2, characterized in that, One end of the first lamp assembly is connected to the positive terminal, and the other end of the first lamp assembly is connected to pin 8 of the DIP switch. Pin 7 of the DIP switch is connected to the negative terminal. The DIP switch shorts pins 1 and 2 of the DIP switch. The shorting of pins 7 and 8 of the DIP switch forms the first gear position.

5. The dial code power multiplying color adjusting power supply circuit according to claim 2, characterized in that, One end of the second lamp group is connected to the positive electrode, and the other end of the second lamp group is connected to pin 5 of the DIP switch. The DIP switch shorts pins 2 and 4 of the DIP switch, and shorts pins 5 and 7 of the DIP switch to form the second gear position.

6. The dial code power multiplying color adjusting power supply circuit according to claim 2, characterized in that, The DIP switch shorts pins 2 and 3, and pins 6 and 7 of the DIP switch are shorted to form the third position.

7. The power adjustment circuit with DIP switch for multiplying power and adjusting color according to claim 1, characterized in that, The rectifier-filter circuit (1) includes rectifier diodes, filter capacitor C1, and varistor RV1. The rectifier diodes include rectifier diodes D1, D2, D3, and D4. The rectifier diodes D3, C1, and RV1 form a rectifier unit. The filter capacitor C1 is connected to the output terminal of the rectifier unit, and the varistor RV1 is connected in parallel to the input terminal of the rectifier unit.

8. The power-multiplying color-tuning power supply circuit with DIP switches according to claim 1, characterized in that, The constant current drive unit includes a constant current control chip U1, an inductor T1, a sampling resistor R3, and a sampling resistor R4. The sampling resistor R3 and the sampling resistor R4 are connected in parallel to form a sampling unit, which is connected to the CS terminal of the constant current control chip U1.

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