A commercial downlight switch power supply circuit

Abstract

The application discloses a commercial down lamp switching power supply circuit, and a color temperature adjusting circuit comprises a first gear circuit, a second gear circuit, a third gear circuit, a fourth gear circuit and a fifth gear circuit.The first gear circuit is directly connected by a first lamp bead group and a switching control module; the second gear circuit is connected by the first lamp bead group, a first diode, a switching control module, a second lamp bead group, a sixth diode, a fifth diode, a third resistor, a third diode, a second resistor and the switching control module; the third gear circuit is connected by the first lamp bead group, the first diode, a second diode, a first resistor, the switching control module, the second lamp bead group, the sixth diode, the fifth diode and the third resistor; the fourth gear circuit is connected by the first lamp bead group, the first diode, the second diode, the first resistor, a fourth diode, a fourth resistor, the switching control module, the second lamp bead group and the sixth diode; and the fifth gear circuit is directly connected by the second lamp bead group and the switching control module.

Description

Technical Field

[0001] This invention relates to the field of LED lighting circuit technology, and more particularly to a commercial downlight switching power supply circuit. Background Technology

[0002] With the widespread adoption of LED chip technology, its cost is decreasing, and more and more lighting devices are composed of LED light strings. However, for LED household lighting fixtures, several problems still exist. Currently, most LED lights on the market are single-color temperature. If consumers want different color temperatures to suit different atmospheres, they need to purchase two different color temperature fixtures, which is costly and also has an impact on the installation environment. Furthermore, retailers need to keep two different color temperature fixtures in stock, leading to high costs and difficult inventory management. With this technology, retailers only need to keep one finished product that can be adjusted to provide multiple color temperatures, such as high and low, thereby reducing inventory pressure and lowering stocking costs. Summary of the Invention

[0003] In view of the above-mentioned shortcomings in the current LED lighting circuit technology field, the present invention provides a commercial downlight switching power supply circuit that can achieve five different color temperatures in one lamp, while enabling mass production of LED lamps and reducing costs.

[0004] To achieve the above objectives, the embodiments of the present invention adopt the following technical solutions:

[0005] A commercial downlight switching power supply circuit includes a first LED group, a second LED group, a switch control module, and a rectifier and filter circuit. The rectifier and filter circuit is connected to the first LED group, the second LED group, and the switch control module. The circuit also includes a color temperature adjustment circuit, which specifically comprises:

[0006] A diode group, comprising a first diode, a second diode, a third diode, a fourth diode, a fifth diode, and a sixth diode;

[0007] A resistor group, comprising a first resistor, a second resistor, a third resistor, and a fourth resistor;

[0008] The first-stage circuit consists of the first LED group directly connected to the switch control module.

[0009] The second circuit includes: a first LED group connected to the positive terminal of a first diode, and the negative terminal of the first diode connected to a switch control module; a second LED group connected to the positive terminal of a sixth diode, the negative terminal of the sixth diode connected to the positive terminal of a fifth diode, the negative terminal of the fifth diode connected to a third resistor, the other end of the third resistor connected to the positive terminal of the third diode, the negative terminal of the third diode connected to a second resistor, and the other end of the second resistor connected to the switch control module.

[0010] The third circuit includes: the first LED group is connected to the positive terminal of the first diode, the negative terminal of the first diode is connected to the positive terminal of the second diode, the negative terminal of the second diode is connected to the first resistor, and the other end of the first resistor is connected to the switch control module; the second LED group is connected to the positive terminal of the sixth diode, the negative terminal of the sixth diode is connected to the positive terminal of the fifth diode, the negative terminal of the fifth diode is connected to the third resistor, and the other end of the third resistor is connected to the switch control module.

[0011] The fourth-stage circuit includes: the first LED group is connected to the positive terminal of the first diode, the negative terminal of the first diode is connected to the positive terminal of the second diode, the negative terminal of the second diode is connected to the first resistor, the other end of the first resistor is connected to the positive terminal of the fourth diode, the negative terminal of the fourth diode is connected to the fourth resistor, and the other end of the fourth resistor is connected to the switch control module; the second LED group is connected to the positive terminal of the sixth diode, and the negative terminal of the sixth diode is connected to the switch control module.

[0012] The fifth-level circuit consists of the second LED group directly connected to the switch control module.

[0013] According to one aspect of the present invention, the color temperature of the first LED group is higher than that of the second LED group, and the first LED group and the second LED group are connected in parallel.

[0014] According to one aspect of the present invention, the switch control module includes a first pin, a second pin, a third pin, a fourth pin, and a fifth pin, wherein the first pin controls a first gear circuit, the second pin controls a second gear circuit, the third pin controls a third gear circuit, the fourth pin controls a fourth gear circuit, and the fifth pin controls a fifth gear circuit.

[0015] According to one aspect of the present invention, the first pin is connected to the positive terminal of the first LED group and the first diode, respectively.

[0016] According to one aspect of the present invention, the second pin is respectively connected to the negative terminal of the first diode, the positive terminal of the second diode, and the second resistor.

[0017] According to one aspect of the present invention, the third pin is respectively connected to one end of the first resistor, the positive terminal of the third diode, the positive terminal of the fourth diode, and the third resistor.

[0018] According to one aspect of the invention, the fourth pin is connected to the fourth resistor, the positive terminal of the fifth diode, and the negative terminal of the sixth diode, respectively.

[0019] According to one aspect of the present invention, the fifth pin is connected to the positive terminal of the second LED group and the sixth diode, respectively.

[0020] According to one aspect of the present invention, the overall color temperature of the first circuit is 5000K, the overall color temperature of the second circuit is 4000K, the overall color temperature of the third circuit is 3500K, the overall color temperature of the fourth circuit is 3000K, and the overall color temperature of the fifth circuit is 2700K.

[0021] According to one aspect of the present invention, the rectifier-filter circuit includes at least a seventh diode, a fifth resistor, a sixth resistor, a first capacitor, a second capacitor, and a first filter capacitor. The anode of the seventh diode is connected to the first capacitor, and the cathode is connected to the first resistor and the positive terminal of the power output terminal. The other end of the positive terminal of the power output terminal is connected to the first LED group and the second LED group. The other end of the first capacitor is connected to the first resistor. The anode of the filter capacitor is connected to the cathode of the seventh diode. The cathode of the filter capacitor is connected to one end of the second capacitor and the negative terminal of the power output terminal. The other end of the second capacitor is grounded. One end of the fifth resistor is connected to the cathode of the seventh diode, and the other end is connected to the negative terminal of the power output terminal and grounded.

[0022] The advantages of this invention are as follows: The color temperature adjustment circuit includes a first-level circuit, which is composed of a first LED group directly connected to a switch control module; a second-level circuit, in which the first LED group is connected to a first diode and a switch control module, and the second LED group is connected to a sixth diode, a fifth diode, a third resistor, a third diode, a second resistor, and a switch control module; a third-level circuit, in which the first LED group is connected to a first diode, a second diode, a first resistor, and a switch control module, and the second LED group is connected to a sixth diode, a fifth diode, a third resistor, and a switch control module; a fourth-level circuit, in which the first LED group is connected to a first diode, a second diode, a first resistor, a fourth diode, a fourth resistor, and a switch control module, and the second LED group is connected to a sixth diode and a switch control module; and a fifth-level circuit, which is composed of the second LED group directly connected to a switch control module. This allows for five different color temperatures to be achieved in a single lamp, while also enabling mass production of LED lamps and reducing costs. Attached Figure Description

[0023] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0024] Figure 1 This is a schematic diagram of the appearance of a commercial downlight switching power supply circuit according to the present invention. Detailed Implementation

[0025] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0026] Example 1:

[0027] like Figure 1 As shown, a commercial downlight switching power supply circuit includes a first LED group, a second LED group, a switch control module, a rectifier and filter circuit, and a color temperature adjustment circuit. The rectifier and filter circuit is connected to the first LED group, the second LED group, and the switch control module, respectively. The switch control module is connected to the color temperature adjustment circuit and controls its conduction mode.

[0028] The first and second LED groups are connected in parallel, each consisting of 7 LEDs connected in series. The color temperature of the first LED group is higher than that of the second LED group; the color temperature of the first group is 5000K, and the color temperature of the second group is 2700K. The color temperature adjustment circuit controls the combined color temperature of the first and second LED groups to be between their respective color temperatures. The highest color temperature is that of the first LED group, and the lowest color temperature is that of the second LED group. By adjusting the current flowing through the first and second LED groups, the color temperature can be controlled.

[0029] The color temperature adjustment circuit includes diodes D3, D5, D6, D7, and D9; resistors R22, R20, R24, and R27; and first-gear, second-gear, third-gear, fourth-gear, and fifth-gear circuits formed by these components. The switch control module includes a double-row five-gear slide switch with pins 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, and 12. Pins 3, 7, 8, 9, 10, 11, and 12 are connected to the rectifier and filter circuit. The anode of diode D3 is connected to the first LED group and pin 1, while the cathode of diode D3 is connected to pin 2, the anode of diode D4, and one end of resistor R20. The cathode of diode D4 is connected to one end of resistor R22. The other end of resistor R22 is connected to pin 4, the anode of diode D5, one end of resistor R24, and the anode of diode D6. The other end of resistor R20 is connected to the cathode of diode D5. The anode of diode D5 is connected to pin 4, one end of resistor R22 and R24, and the anode of diode D6. The cathode of diode D6 is connected to resistor R27. The other end of resistor R27 is connected to pin 5, the anode of diode D7, and the cathode of diode D9. The anode of diode D7 is connected to the cathode of diode D9, and the cathode of diode D7 is connected to the other end of resistor R24. The anode of diode D9 is connected to the second LED group and pin 6. The cathode of diode D9 is connected to the anode of diode D7, resistor R27, and pin 5. The first-stage circuit is formed by directly connecting the first LED group and pin 1. The second-level circuit consists of two branches. The first branch is composed of the first LED group, diode D3, and pin 2 connected in sequence. The second branch is composed of the second LED group, diodes D9 and D7, resistor R24, diode D5, resistor R20, and pin 2 connected in sequence. The third-level circuit also consists of two branches. The first branch is composed of the first LED group, diodes D3 and D4, resistor R22, and pin 4 connected in sequence. The second branch is composed of the second LED group, diodes D9 and D7, resistor R24, and pin 4 connected in sequence. The fourth-level circuit also consists of two branches. The first branch is composed of the first LED group, diodes D3 and D4, resistor R22, diode D6, resistor R27, and pin 5 connected in sequence. The second branch is composed of the second LED group, diode D9, and pin 5 connected in sequence. The fifth-level circuit consists of the second LED group directly connected to pin 6. The first-level circuit has a combined color temperature of 5000K, the second-level circuit has a combined color temperature of 4000K, the third-level circuit has a combined color temperature of 3500K, the fourth-level circuit has a combined color temperature of 3000K, and the fifth-level circuit has a combined color temperature of 2700K.

[0030] The current flowing through the first and second LED groups is adjusted by diodes and resistors in the color temperature adjustment circuit, and the final combined color temperature of the first and second LED groups is set by adjusting the resistance value. Because the diodes and resistors on the color temperature adjustment circuit connected to different pins are distributed differently, each setting of the dual-row five-position slide switch corresponds to a different combined color temperature.

[0031] The rectifier and filter circuit has its input terminals N and L connected to a voltage range of 120V to 347V. A varistor RV1 is connected between input terminals N and L, and a fuse F1 is installed between varistor RV1 and L. Input terminal N is connected to port 2 of inductor LF1, and input terminal L is connected to port 3 of inductor LF1. Ports 1 and 4 of inductor LF1 are connected to both sides of safety capacitor CX1. CX1 is connected in parallel with resistors R1 and R2, and R1 and R2 are connected in series. The outer side of R1 is connected to port 1 of inductor LF2, and the outer side of R2 is connected to port 2 of inductor LF2. Port 4 of inductor LF2 is connected to port 4 of resistor bridge BD1, and port 3 of inductor LF2 is connected to port 2 of resistor bridge BD1. Port 3 of resistor bridge BD1 is grounded. One port of resistor bridge BD1 is connected to one end of inductor L1, resistor R3, and capacitor C1, with the other end of capacitor C1 grounded. The other ends of inductor L1 and resistor R3 are connected to resistors R11, R9, and one end of inductor coil L2A. Resistor R11 is connected to resistors R12 and R13 in sequence, with the other end of resistor R13 connected to the VDD pin of chip U1. The other end of resistor R9 is connected to resistor R10 and the HV pin of U1 in sequence. The COMP pin of U1 is connected to capacitor C9 and resistor R17 in sequence and grounded. Capacitor C8 is connected in parallel with capacitor C9 and resistor R17. The GND pin of U2 is grounded. The VDD pin of U2 is connected to the cathode of diode D14, one end of capacitor C6 and capacitor C7, with the other ends of capacitors C6 and C7 grounded. The FB pin of U1 is connected to one end of capacitor C5, resistor R14, and resistor R16 in sequence, with the other ends of resistors R14 and R16 grounded. The CS pin of U1 is connected to one end of capacitor C8 and resistor R8. The other end of capacitor C8 is grounded. The other end of resistor R8 is connected to one end of resistors R17, R18, and R19. The other ends of resistors R17, R18, and R19 are also grounded. The GATE pin of U1 is connected to one end of resistors R6 and R7. The other end of resistor R7 is connected to the cathode of diode D2. The anode of diode D2 and the other end of R6 are connected to resistor R5 and the gate of MOSFET Q1. The other end of resistor R5 and the source of MOSFET Q1 are connected to resistor R18. The other end of coil inductor L2A is connected to the drain of Q1, the anode of diode D3A, the anode of diode D3, resistor R4, and one end of resistor R4A. The other end of resistors R4 and R4A is connected to capacitor C4. The other end of capacitor C4 is connected to the cathodes of diodes D3A and D3, resistor R14, and the cathode of diode D1. The other end of resistor R14 is connected to resistors R15 and R16. The positive terminal of diode D1 is connected to capacitor C2, and the other end of capacitor C2 is grounded. Capacitor C3 is connected in parallel with diode D1. The negative terminal of diode D1 is connected to capacitors CE2 and CE3 in sequence and then grounded. Resistor R18 is connected in parallel with capacitor CE2, and resistor R19 is connected in parallel with capacitor CE3.The cathode of diode D1 is connected in sequence to one end of resistor R30, capacitor C10, resistor R20, resistor R21, resistor R22, and port 6 of inductor T3B. Resistor R30 is connected in sequence to R31 and the HV pin of chip IC2. The VDD pin of IC2 is connected to the anode of capacitor C17, capacitor C18, and diode D14, with the other ends of capacitors C17 and C18 grounded. The FB pin of IC2 is connected to one end of resistor R35, resistor R34, and capacitor C13, with the other ends of resistor R34 and capacitor C13 grounded. The other end of resistor R35 is connected to resistor R36 and inductor T1A. Resistor R36 is connected in sequence to the anode of diode D6, capacitor C26, and grounded, with the other end of inductor T1A grounded. The cathode of diode D6 is connected to resistor R37 and the collector of transistor Q5. The other end of resistor R37 is connected to the base of Q5 and the cathode of diode ZE1. The anode of ZD1 is grounded. The emitter of transistor Q5 is connected to the anode of diode D14. The DIM pin of IC2 is connected to capacitor C12 and the cathode of diode D8. The other end of capacitor C12 is grounded, and the anode of diode D8 is grounded. The input terminals DIM+ and DIM- are connected to a 0-10V voltage via an external dimmer to power the color temperature adjustment circuit. DIM+ is connected to one end of resistor R39. The other end of resistor R39 is connected to the cathode of diode D9 and one end of capacitor C17. The other end of capacitor C17 is connected to the DIM- terminal and port 2 of inductor LF3. The anode of diode D9 is connected to port 3 of inductor LF3. Ports 4 and 1 of inductor LF3 are connected to the cathode and anode of diode D8, respectively. The GND pin of IC2 is grounded. The GATE pin of IC2 is connected to one end of resistor R29. The other end of resistor R29 is connected to the anode of diode D5 and the base of transistor Q3. The cathode of diode D5 is connected to the gate of MOSFET Q2 and resistor R32. The other end of resistor R32 is connected to the emitter of transistor Q3. The CS pin of IC2 is connected to resistor R33 and capacitor C11. The other end of capacitor C11 is grounded. The other end of resistor R33, the collector of transistor Q3, and the source of MOSFET Q2 are connected to one end of resistors R28, R27, R26, and R25. The other ends of resistors R26 and R25 are grounded. The other ends of resistors R28 and R27 are connected to switches J3 and J2, respectively. The other ends of switches J3 and J2 are grounded. The other end of capacitor C10, resistor R20, resistor R21, and resistor R22 is connected to resistor R23. The other end of resistor R23 is connected to the negative terminal of diode D4. Resistor R24 ​​and resistor R23 are connected in parallel. The positive terminal of diode D4 is connected to the drain of field-effect transistor Q2.The other end of inductor T3B is connected to the drain of MOSFET Q2. Inductor T3B is connected to inductor T3D. One end of inductor T3D is connected to capacitor C15 and the positive terminal of diode D12. Capacitor C15 is connected in series with resistor R49. The other end of resistor R49 is connected to the negative terminal of diode D12, capacitor CE5, resistor R48, and LED+ port. The other end of LED+ port is connected to the first LED bead group and the second LED bead group. The other end of inductor T3D, capacitor CE5, and resistor R48 are connected to capacitor CY4 and LED- port. The other end of capacitor CY4 is grounded. The other end of LED- port is connected to pins 3, 7, 8, 9, 10, 11, and 12 of the switch control module.

[0032] When the dual-row five-position sliding switch is moved to the high color temperature position, and the first position circuit is connected through pin 1, only the first LED group is lit, while the second LED group is not lit, and the overall color temperature is displayed as 5000K.

[0033] When the dual-row five-position slide switch is moved to the second-highest color temperature setting, and the second-position circuit is connected via pin 2, both the first and second LED groups are illuminated. At this time, the total voltage of the first-position circuit is the voltage of the first LED group plus the voltage of diode D3, which is equal to the voltage of the second LED group plus the voltage of diode D9 plus the voltage of diode D7 plus the voltage of resistor R24 ​​plus the voltage of diode D5 plus the voltage of resistor R20. The current in the circuit containing the first LED group is greater than the current in the circuit containing the second LED group. By adjusting the resistance value, the required current for the second-position circuit in actual testing can be obtained, achieving a comprehensive color temperature of 4000K.

[0034] When the dual-row five-position slide switch is moved to the medium color temperature position, and the third-position circuit is connected via pin 4, both the first and second LED groups are illuminated. At this time, the total voltage of the first-position circuit is the sum of the voltages of the first LED group, diode D3, diode D4, and resistor R22, which equals the sum of the voltages of the second LED group, diode D9, diode D7, and resistor R24. The current in the circuit containing the first LED group is equal to the current in the circuit containing the second LED group. By adjusting the resistance value, the required current for the third-position circuit can be obtained for actual testing, achieving a comprehensive color temperature of 3500K.

[0035] When the dual-row five-position slider switch is moved to the second-lowest color temperature setting, and the fourth-position circuit is connected via pin 5, both the first and second LED groups are illuminated. At this time, the total voltage of the first-position circuit is the sum of the voltages of the first LED group, diode D3, diode D4, resistor R22, diode D6, and resistor R27, which equals the sum of the voltages of the second LED group and diode D9. The current in the circuit containing the first LED group is less than the current in the circuit containing the second LED group. By adjusting the resistance values, the required current for the fourth-position circuit can be obtained for actual testing, achieving a comprehensive color temperature of 3000K.

[0036] When the dual-row five-position sliding switch is slid to the low color temperature position, and the fifth position circuit is connected through pin 6, only the second LED group is lit, while the first LED group is not lit, and the overall color temperature is displayed as 2700K.

[0037] The advantages of this invention are as follows: The color temperature adjustment circuit includes a first-level circuit, which is composed of a first LED group directly connected to a switch control module; a second-level circuit, in which the first LED group is connected to a first diode and a switch control module, and the second LED group is connected to a sixth diode, a fifth diode, a third resistor, a third diode, a second resistor, and a switch control module; a third-level circuit, in which the first LED group is connected to a first diode, a second diode, a first resistor, and a switch control module, and the second LED group is connected to a sixth diode, a fifth diode, a third resistor, and a switch control module; a fourth-level circuit, in which the first LED group is connected to a first diode, a second diode, a first resistor, a fourth diode, a fourth resistor, and a switch control module, and the second LED group is connected to a sixth diode and a switch control module; and a fifth-level circuit, which is composed of the second LED group directly connected to a switch control module. This allows for five different color temperatures to be achieved in a single lamp, while also enabling mass production of LED lamps and reducing costs.

[0038] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in the present invention should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. A commercial downlight switching power supply circuit, comprising a first LED group, a second LED group, a switch control module, and a rectifier and filter circuit, wherein the rectifier and filter circuit is connected to the first LED group, the second LED group, and the switch control module respectively, characterized in that, It also includes a color temperature adjustment circuit, which specifically includes: A diode group, comprising a first diode, a second diode, a third diode, a fourth diode, a fifth diode, and a sixth diode; A resistor group, comprising a first resistor, a second resistor, a third resistor, and a fourth resistor; The first-stage circuit consists of the first LED group directly connected to the switch control module. The second circuit includes: a first LED group connected to the positive terminal of a first diode, and the negative terminal of the first diode connected to a switch control module; a second LED group connected to the positive terminal of a sixth diode, the negative terminal of the sixth diode connected to the positive terminal of a fifth diode, the negative terminal of the fifth diode connected to a third resistor, the other end of the third resistor connected to the positive terminal of the third diode, the negative terminal of the third diode connected to a second resistor, and the other end of the second resistor connected to the switch control module. The third circuit includes: the first LED group is connected to the positive terminal of the first diode, the negative terminal of the first diode is connected to the positive terminal of the second diode, the negative terminal of the second diode is connected to the first resistor, and the other end of the first resistor is connected to the switch control module; the second LED group is connected to the positive terminal of the sixth diode, the negative terminal of the sixth diode is connected to the positive terminal of the fifth diode, the negative terminal of the fifth diode is connected to the third resistor, and the other end of the third resistor is connected to the switch control module. The fourth-stage circuit includes: the first LED group is connected to the positive terminal of the first diode, the negative terminal of the first diode is connected to the positive terminal of the second diode, the negative terminal of the second diode is connected to the first resistor, the other end of the first resistor is connected to the positive terminal of the fourth diode, the negative terminal of the fourth diode is connected to the fourth resistor, and the other end of the fourth resistor is connected to the switch control module; the second LED group is connected to the positive terminal of the sixth diode, and the negative terminal of the sixth diode is connected to the switch control module. The fifth-level circuit consists of the second LED group directly connected to the switch control module.

2. The commercial downlight switching power supply circuit according to claim 1, characterized in that, The color temperature of the first LED group is higher than that of the second LED group, and the first LED group and the second LED group are connected in parallel.

3. The commercial downlight switching power supply circuit according to claim 1, characterized in that, The switch control module includes a first pin, a second pin, a third pin, a fourth pin, and a fifth pin. The first pin controls the first gear circuit, the second pin controls the second gear circuit, the third pin controls the third gear circuit, the fourth pin controls the fourth gear circuit, and the fifth pin controls the fifth gear circuit.

4. The commercial downlight switching power supply circuit according to claim 3, characterized in that, The first pin is connected to the positive terminal of the first LED bead group and the first diode, respectively.

5. The commercial downlight switching power supply circuit according to claim 3, characterized in that, The second pin is connected to the negative terminal of the first diode, the positive terminal of the second diode, and the second resistor, respectively.

6. The commercial downlight switching power supply circuit according to claim 3, characterized in that, The third pin is connected to one end of the first resistor, the positive terminal of the third diode, the positive terminal of the fourth diode, and the third resistor, respectively.

7. The commercial downlight switching power supply circuit according to claim 3, characterized in that, The fourth pin is connected to the fourth resistor, the positive terminal of the fifth diode, and the negative terminal of the sixth diode, respectively.

8. The commercial downlight switching power supply circuit according to claim 3, characterized in that, The fifth pin is connected to the positive terminal of the second LED group and the sixth diode, respectively.

9. The commercial downlight switching power supply circuit according to claim 1, characterized in that, The overall color temperature of the first-level circuit is 5000K, the overall color temperature of the second-level circuit is 4000K, the overall color temperature of the third-level circuit is 3500K, the overall color temperature of the fourth-level circuit is 3000K, and the overall color temperature of the fifth-level circuit is 2700K.

10. The commercial downlight switching power supply circuit according to any one of claims 1 to 9, characterized in that, The rectifier and filter circuit includes at least a seventh diode, a fifth resistor, a sixth resistor, a first capacitor, a second capacitor, and a first filter capacitor. The anode of the seventh diode is connected to the first capacitor, and the cathode is connected to the first resistor and the positive terminal of the power output. The other end of the positive terminal of the power output is connected to the first LED group and the second LED group. The other end of the first capacitor is connected to the first resistor. The anode of the filter capacitor is connected to the cathode of the seventh diode. The cathode of the filter capacitor is connected to one end of the second capacitor and the negative terminal of the power output. The other end of the second capacitor is grounded. One end of the fifth resistor is connected to the cathode of the seventh diode, and the other end is connected to the negative terminal of the power output and grounded.

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