Dimming and color adjustment control circuit

Abstract

This utility model relates to a dimming and color-adjusting control circuit, comprising: an AC-to-DC step-down constant-voltage isolation circuit for supplying power to a first constant-voltage-to-constant-current circuit, a second constant-voltage-to-constant-current circuit, a constant-voltage stabilizing circuit, and a control module power supply circuit; a control circuit that outputs a first PWM signal to the first constant-voltage-to-constant-current circuit, outputs a second PWM signal to the second constant-voltage-to-constant-current circuit, outputs an RGB signal to a color-changing RGB module, and outputs a switching signal to the constant-voltage stabilizing circuit; the first constant-voltage-to-constant-current circuit is connected to a cold-light LED module and adjusts the constant drive current output to the cold-light LED module according to the first PWM signal; the second constant-voltage-to-constant-current circuit is connected to a warm-light LED module and adjusts the constant drive current output to the warm-light LED module according to the second PWM signal; the constant-voltage stabilizing circuit converts constant-voltage DC power into a first constant voltage and supplies power to the control circuit; and the control module power supply circuit converts the monitoring voltage into a second constant voltage and supplies power to the control circuit.

Description

Technical Field

[0001] This utility model relates to the field of lighting control technology, specifically to a dimming and color-adjusting control circuit. Background Technology

[0002] As smart lighting becomes more widely used, consumers' demands for functionality continue to increase, ranging from illumination to suit various application scenarios, brightness adjustment, color temperature selection, RGB dynamic scenes, light rhythm, etc. However, ordinary dual color temperature systems cannot achieve coordinated control of cool / warm light and RGB dynamic lighting effects. Utility Model Content

[0003] To address the shortcomings of existing technologies, this utility model provides a dimming and color-tuning control circuit, aiming to solve the problem that ordinary dual-color temperature systems cannot achieve coordinated control of cool / warm light and RGB dynamic lighting effects.

[0004] To achieve the above objectives, the present invention adopts the following technical solution:

[0005] A dimming and color-tuning control circuit includes: an AC-to-DC step-down constant voltage isolation circuit, a first constant voltage to constant current circuit, a second constant voltage to constant current circuit, a constant voltage regulator circuit, a control module power supply circuit, a control circuit, a cold light LED module, a warm light LED module, and a RGB color module.

[0006] The AC-to-DC step-down constant voltage isolation circuit has an input terminal connected to AC mains power and an output terminal that outputs isolated constant voltage DC power, which powers the first constant voltage to constant current circuit, the second constant voltage to constant current circuit, the constant voltage regulator circuit, and the control module power supply circuit.

[0007] The control circuit outputs a first PWM signal to the first constant voltage to constant current circuit, outputs a second PWM signal to the second constant voltage to constant current circuit, outputs an RGB signal to the RGB module, and outputs a switching signal to the constant voltage regulator circuit, and the sum of the duty cycles of the first PWM signal and the second PWM signal does not exceed 100%.

[0008] The first constant voltage to constant current circuit is connected to the cold light LED module and adjusts the constant drive current output to the cold light LED module according to the duty cycle of the first PWM signal.

[0009] The second constant voltage to constant current circuit is connected to the warm light LED module and adjusts the constant drive current output to the warm light LED module according to the duty cycle of the second PWM signal.

[0010] The constant voltage regulator circuit converts the constant DC voltage output by the AC-to-DC step-down constant voltage isolation circuit into a first constant voltage and supplies power to the control circuit.

[0011] The power supply circuit of the control module converts the monitoring voltage output by the AC-to-DC step-down constant voltage isolation circuit into a second constant voltage and supplies power to the control circuit.

[0012] Furthermore, the AC-to-DC step-down constant voltage isolation circuit includes: LED driver U1, varistor MOV1, varistor MOV2, thermal relay F1, common mode inductor LF1, common mode inductor LF2, rectifier bridge DB1, inductor L1, diode D1, diode D2, diode D3, diode D9, NMOS transistor Q4, transformer T1, capacitor CY1, capacitor CX1, capacitor EC1, capacitor EC2, capacitor EC3, capacitor C1, capacitor C2, capacitor C3, capacitor C4, capacitor C5, and so on. Capacitor C6, Capacitor C7, Capacitor C8, Capacitor C9, Capacitor C10, Capacitor C38, Resistor R1A, Resistor R2A, Resistor R1, Resistor R2, Resistor R3, Resistor R4, Resistor R5, Resistor R6, Resistor R7, Resistor R8, Resistor R9, Resistor R10, Resistor R11, Resistor R12, Resistor R13, Resistor R14, Resistor R15, Resistor R16, Resistor R17, Resistor R18, Resistor R19, Resistor R20, Resistor R46, Resistor R47, Resistor R48, Resistor R50;

[0013] The mains power live wire is connected to the first terminal of the varistor MOV1 and the first pin of the common-mode inductor LF1 via the thermal relay F1. The mains power neutral wire is connected to the second pin of the common-mode inductor LF1. The third pin of the common-mode inductor LF1 is connected to the capacitor CX1, the first terminal of the resistor R1A, and the first pin of the common-mode inductor LF2. The fourth pin of the common-mode inductor LF1 is connected to the capacitor CX1, the second terminal of the resistor R2A, and the second pin of the common-mode inductor LF2. The second terminal of the resistor R1A is connected to the first terminal of the resistor R2A. The third pin of the common-mode inductor LF2 is connected to the first pin of the rectifier bridge DB1. The fourth pin of the common-mode inductor LF2 is connected to... The second and third pins of rectifier bridge DB1 are connected to the first terminals of capacitor C1, resistor R4, and inductor L1. The second terminals of resistor R4 and inductor L1 are connected to the first terminals of varistor MOV2, capacitor C2, resistor R12, resistor R13, resistor R14, resistor R15, capacitor C3, capacitor C9, and the sixth pin of transformer T1 as the high-voltage input terminal HV+. The fourth pin of rectifier bridge DB1, the second terminal of capacitor C1, and the second terminals of varistor MOV2 and capacitor C2 are grounded. The second terminals of resistor R13, resistor R14, resistor R15, and capacitor C3 are connected to the second terminals of capacitor C1. The first terminal of resistor R8 is connected, the second terminal of resistor R8 is connected to the reverse terminal of diode D3, the forward terminal of diode D3 is connected to the second terminal of capacitor C9 and the fourth pin of transformer T1, the second terminal of resistor R12 is connected to the first terminal of resistor R11, the second terminal of resistor R11 is connected to resistor R10, capacitor EC1, the first terminal of capacitor C7 and the VDD pin of LED driver U1, the GND pin of LED driver U1 is connected to the second terminals of capacitor EC1 and capacitor C7 and grounded, the second terminal of resistor R10 is connected to the reverse terminal of diode D1, and the forward terminal of diode D1 is connected to the first terminal of resistor R3 and the fourth pin of transformer T1. The second pin of transformer T1 is connected to the second terminal of resistor R3, which is connected to the FB pin of LED driver U1 and the first terminals of resistors R1, R2, and C4. The second terminals of resistors R1, R2, and C4 are grounded. The first pin of transformer T1 is connected to the first terminal of capacitor C10 and grounded. The second terminal of capacitor C10 is connected to the fourth pin of transformer T1 and the drain of NMOS transistor Q4. The gate of NMOS transistor Q4 is connected to the first terminals of resistors R7 and R50 and the forward terminal of diode D2. The second terminal of resistor R7 is connected to the reverse terminal of diode D2 and the GATE pin of LED driver U1.The second end of resistor R50 is connected to the first ends of resistors R16-R20, resistor R46, and resistor R47, and the source of NMOS transistor Q4. The second end of resistor R20 is connected to the first end of capacitor C8 and the CS pin of LED driver U1. The second ends of resistors R16-R19, resistor R46, and resistor R47 are connected to the first ends of capacitors C5 and C6, and the second end of capacitor C8, and are grounded. The second end of capacitor C5 is connected to the first end of resistor R5. The second end of capacitor C6 is connected to the second end of resistor R5 and the LED. The CMP pin of driver U1 is connected to the third pin of transformer T1, which is connected to the first terminal of capacitors CY1, EC2, and EC3, and resistor R9. The second terminal of CY1 is grounded. The fifth pin of transformer T1 is connected to the first terminal of capacitor C38 and the forward terminal of diode D9, serving as the monitoring voltage terminal SV+. The second terminal of capacitor C38 is connected to the first terminal of resistor R48, and the second terminal of resistor R48 is connected to the second terminal of capacitors EC2 and EC3, the second terminal of resistor R9, and the reverse terminal of diode D9, serving as the constant voltage DC output terminal VOUT+.

[0014] Furthermore, the first constant voltage to constant current circuit includes: LED constant current controller U2, NMOS transistor Q1, diode D7, capacitor EC6, inductor L3, capacitor C13, capacitor C16, resistor R21, resistor R22, resistor R23, resistor R27, resistor R29, resistor R32, resistor R37, and resistor R38.

[0015] The first pin of the LED constant current controller U2 is connected to the gate of the NMOS transistor Q1 through the resistor R29. The second pin of the LED constant current controller U2 is connected to the first terminals of the resistors R21-R23, the capacitor EC6, the capacitor C11, the resistor C12, and the capacitor CY1. The second terminal of the capacitor EC6 is connected to the first terminal of the resistor R27. The second terminal of the resistor R27 is connected to the first terminal of the inductor L3, the capacitor EC5, and the cold light LED module. The second terminal of the capacitor EC5 is connected to the constant voltage DC output terminal VOUT+. The second terminal of the inductor L3 is connected to the first terminals of the capacitors C13 and C16, the forward terminal of the diode D7, and the drain of the NMOS transistor Q1. The second terminal of the capacitor C13 is connected to... The first terminal of resistor R32 is connected to the first terminal of resistor R32. The second terminal of resistor R32 is connected to the reverse terminal of diode D7 and the constant voltage DC output terminal VOUT+. The second terminal of capacitor C16 is connected to the first terminal of resistor R38. The second terminal of resistor R38 is connected to the first terminals of resistors R21 to R23, the source of NMOS transistor Q1, and the third pin of LED constant current controller U2. The fourth pin of LED constant current controller U2 is connected to the constant voltage DC output terminal VOUT+ through resistor R37. The fifth pin of LED constant current controller U2 is connected to the first PWM signal output terminal of the control circuit and the second terminal of resistor C12 through resistor R28. The sixth pin of LED constant current controller U2 is connected to the second terminal of capacitor C11.

[0016] Furthermore, the second constant voltage to constant current circuit includes: LED constant current controller U3, NMOS transistor Q2, inductor L4, diode D8, capacitor EC8, capacitor C14, capacitor C15, capacitor C18, resistor R24, resistor R25, resistor R26, resistor R30, resistor R33, resistor R34, resistor R39, resistor R41, and resistor R42;

[0017] The first pin of the LED constant current controller U3 is connected to the gate of the NMOS transistor Q2 through resistor R30. The second pin of the LED constant current controller U3 is connected to resistors R24-R26, resistor R34, capacitor C18, resistor C17, and the first terminal of capacitor CY1. The second terminal of resistor R34 is connected to the first terminal of capacitor EC8. The second terminal of capacitor EC8 is connected to capacitor EC7, the first terminal of inductor L4, and the warm light LED module. The second terminal of capacitor EC7 is connected to the constant voltage DC output terminal VOUT+. The second terminal of inductor L4 is connected to the first terminals of capacitors C14 and C15, the forward terminal of diode D8, and the drain of NMOS transistor Q2. The second terminal of capacitor C14 is connected to the first terminal of resistor R33. The second terminal of R33 is connected to the directional terminal of diode D8 and the constant voltage DC output terminal VOUT+. The second terminal of capacitor C15 is connected to the first terminal of resistor R39. The second terminal of resistor R39 is connected to the second terminals of resistors R24 to R26, the source of NMOS transistor Q2, and the third pin of LED constant current controller U3. The fourth pin of LED constant current controller U3 is connected to the first terminal of resistor R42. The second terminal of resistor R42 is connected to the constant voltage DC output terminal VOUT+. The fifth pin of LED constant current controller U3 is connected to the first terminal of resistor R41. The second terminal of resistor R41 is connected to the second terminal of resistor C17 and the second PWM signal output terminal of the control circuit. The sixth pin of LED constant current controller U3 is connected to the second terminal of capacitor C18.

[0018] Furthermore, the constant voltage regulator circuit includes: a switching buck constant voltage driver U5, a diode D6, an inductor L2, a ferrite bead B1, a ferrite bead B2, a capacitor EC4, a capacitor EC5, a capacitor EC9, a capacitor C31, a capacitor C32, a capacitor C26, a capacitor C17, a capacitor C28, and resistors R55, R35, R36, R40, R51, R43, and R49.

[0019] The Vin pin of the switching buck constant voltage driver U5 is connected to the resistor R55, the capacitor C31, the capacitor EC4, the first terminal of the ferrite bead B2, and the PAD pin of the switching buck constant voltage driver U5. The GND pin of the switching buck constant voltage driver U5 is connected to the first terminal of the capacitor CY1. The EN pin of the switching buck constant voltage driver U5 is connected to the second terminal of the resistor R55, the first terminal of the resistor R35, and the switch control terminal of the control circuit. The second terminal of the resistor R35 is connected to the second terminals of the capacitors C31 and EC4, the forward terminal of the diode D6, the capacitor EC5, C32, C26, and the first terminal of the capacitor CY1. The second terminal of the ferrite bead B2 is connected to the capacitor EC9 and the first terminal of the resistor R40. The second terminal of the EC9 is connected to the capacitor CY1. Firstly, the second end of resistor R40 is connected to the constant voltage DC output terminal VOUT+; the second end of resistor R49 is connected to the first end of capacitor C17 and resistor R43; the second ends of capacitor C17, resistor R43, capacitor EC5, and capacitor C32 are connected to the first end of ferrite bead B1 and inductor L2; the second end of ferrite bead B1 is connected to the second end of capacitor C26 and serves as the first constant voltage output terminal; the second end of inductor L2 is connected to the first end of resistor R36, resistor R51, and capacitor C28, the reverse terminal of diode D6, and the SW pin of the switching buck constant voltage driver U5; the second ends of resistor R36 and resistor R51 are connected to the CS pin of the switching buck constant voltage driver U5; and the second end of capacitor C28 is connected to the BS pin of the switching buck constant voltage driver U5.

[0020] Furthermore, the power supply circuit of the control module includes: a buck fast-shutdown regulator U4, diode D4, diode D5, inductor L5, capacitor EC10, capacitor EC11, capacitor C19, capacitor C20, capacitor C21, resistor R31, resistor R44, resistor R45, and resistor R54.

[0021] The first pin of the buck fast-shutdown regulator U4 is connected to the first terminal of capacitor C19. The second terminal of capacitor C19 is connected to the first terminal of inductor L5, the reverse terminal of diode D5, and the sixth pin of the buck fast-shutdown regulator U4. The forward terminal of diode D5 is connected to the first terminal of capacitor EC10 and capacitor CY1. The second terminal of capacitor EC10 is connected to the second terminal of inductor L5, capacitor C21, and the first terminal of resistor R45, serving as the second constant voltage output terminal. The second terminal of resistor R45 is connected to the second terminal of capacitor C21 and the first terminal of resistor R44. The third pin of the buck fast-shutdown regulator U4 is connected to the third pin of the buck fast-shutdown regulator U4. The second pin of the buck fast-shutdown regulator U4 is connected to the first pin of the first pin of the first pin of the second pin of the first pin of the second pin of the second pin of the second pin of the second pin of the second pin of the second pin of the second pin of the second pin of the second pin of the second pin of the second pin of the third pin of the second pin of the first ...

[0022] Furthermore, the power supply circuit of the control module also includes: a power strip CON3, wherein the first, second, third, fourth, fifth, sixth and seventh pins of the power strip CON3 are respectively connected to the second constant voltage, the first pin of capacitor CY1, the first constant voltage, the RGB signal, the switch signal, the first PWM signal and the second PWM signal.

[0023] The dimming and color-tuning control circuit described in this utility model has the following advantages:

[0024] A constant voltage isolation circuit with AC to DC step-down isolator achieves mains power safety isolation, meeting safety regulations while providing multiple power supplies. A dual-path independent constant voltage to constant current architecture (cool / warm LED modules) combined with a vibrant RGB module enables precise color temperature adjustment and color mixing. The control circuit employs a constraint that the total PWM signal is ≤100%, ensuring that cool / warm LEDs do not operate at full power simultaneously, preventing circuit overload. The constant voltage regulator circuit and control module power supply circuit are designed separately. The control circuit is doubly protected by the constant voltage regulator circuit (main power supply) and the control module power supply circuit (backup power supply), maintaining 30 seconds of emergency operation even in the event of a power failure, reducing the impact of high-power load fluctuations on the control circuit. The vibrant RGB module is independently controlled, enabling coordinated operation of dynamic scene lighting effects and basic lighting. Attached Figure Description

[0025] Figure 1 This is a circuit block diagram of the dimming and color-tuning control circuit according to an embodiment of the present utility model;

[0026] Figure 2 This is a circuit diagram of the AC-to-DC step-down constant voltage isolation circuit according to an embodiment of the present invention;

[0027] Figure 3 This is a circuit diagram of the first constant voltage to constant current circuit and the second constant voltage to constant current circuit according to an embodiment of this utility model;

[0028] Figure 4 This is a circuit diagram of the constant voltage regulator circuit according to an embodiment of the present invention;

[0029] Figure 5 This is a circuit diagram of the power supply circuit for the control module according to an embodiment of the present invention. Detailed Implementation

[0030] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0031] As shown in the figure, this utility model discloses a dimming and color-adjusting control circuit, including: an AC to DC step-down constant voltage isolation circuit, a first constant voltage to constant current circuit, a second constant voltage to constant current circuit, a constant voltage regulator circuit, a control module power supply circuit, a control circuit, a cold light LED module, a warm light LED module, and a RGB color module.

[0032] An AC-to-DC step-down constant voltage isolation circuit connects to AC mains power at its input and outputs isolated constant voltage DC power at its output, which powers the first constant voltage to constant current circuit, the second constant voltage to constant current circuit, the constant voltage regulator circuit, and the control module power supply circuit.

[0033] The control circuit outputs a first PWM signal to a first constant voltage to constant current circuit, outputs a second PWM signal to a second constant voltage to constant current circuit, outputs an RGB signal to the RGB module, and outputs a switching signal to the constant voltage regulator circuit, and the sum of the duty cycles of the first PWM signal and the second PWM signal does not exceed 100%.

[0034] The first constant voltage to constant current circuit is connected to the cold light LED module and adjusts the constant drive current output to the cold light LED module according to the duty cycle of the first PWM signal.

[0035] The second constant voltage to constant current circuit is connected to the warm light LED module and adjusts the constant drive current output to the warm light LED module according to the duty cycle of the second PWM signal.

[0036] The constant voltage regulator circuit converts the constant DC voltage output from the AC-to-DC step-down constant voltage isolation circuit into a first constant voltage and supplies power to the control circuit.

[0037] The control module power supply circuit converts the monitoring voltage output from the AC-to-DC step-down constant voltage isolation circuit into a second constant voltage and supplies power to the control circuit.

[0038] A constant voltage isolation circuit with AC to DC step-down isolator achieves mains power safety isolation, meeting safety regulations while providing multiple power supplies. A dual-path independent constant voltage to constant current architecture (cool / warm LED modules) combined with a vibrant RGB module enables precise color temperature adjustment and color mixing. The control circuit employs a constraint that the total PWM signal is ≤100%, ensuring that cool / warm LEDs do not operate at full power simultaneously, preventing circuit overload. The constant voltage regulator circuit and control module power supply circuit are designed separately. The control circuit is doubly protected by the constant voltage regulator circuit (main power supply) and the control module power supply circuit (backup power supply), maintaining 30 seconds of emergency operation even in the event of a power failure, reducing the impact of high-power load fluctuations on the control circuit. The vibrant RGB module is independently controlled, enabling coordinated operation of dynamic scene lighting effects and basic lighting.

[0039] Furthermore, such as Figure 2 As shown, the AC-to-DC step-down constant voltage isolation circuit includes: LED driver U1, varistor MOV1, varistor MOV2, thermal relay F1, common mode inductor LF1, common mode inductor LF2, rectifier bridge DB1, inductor L1, diode D1, diode D2, diode D3, diode D9, NMOS transistor Q4, transformer T1, capacitor CY1, capacitor CX1, capacitor EC1, capacitor EC2, capacitor EC3, capacitor C1, capacitor C2, capacitor C3, capacitor C4, capacitor C5, and capacitor C6. 6. Capacitors C7, C8, C9, C10, C38; Resistors R1A, R2A, R1, R2, R3, R4, R5, R6, R7, R8, R9, R10, R11, R12, R13, R14, R15, R16, R17, R18, R19, R20, R46, R47, R48, R50;

[0040] The mains live wire is connected to the first terminal of the varistor MOV1 and the first pin of the common-mode inductor LF1 via the thermal relay F1. The mains neutral wire is connected to the second pin of the common-mode inductor LF1. The third pin of the common-mode inductor LF1 is connected to the first terminal of capacitor CX1, resistor R1A, and the first pin of the common-mode inductor LF2. The fourth pin of the common-mode inductor LF1 is connected to the second terminal of capacitor CX1, resistor R2A, and the second pin of the common-mode inductor LF2. The second terminal of resistor R1A is connected to the first terminal of resistor R2A. The third pin of the common-mode inductor LF2 is connected to the first pin of the rectifier bridge DB1. The fourth pin of the common-mode inductor LF2 is connected to the second pin of the rectifier bridge DB1. The third pin of the rectifier bridge DB1 is connected to the first terminal of capacitor C1, resistor R4, and inductor L1. The second terminals of resistor R4 and inductor L1 are connected to the first terminals of varistor MOV2, capacitor C2, resistors R12, R13, R14, R15, capacitors C3 and C9, and the sixth pin of transformer T1 as the high-voltage input terminal HV+. The fourth pin of rectifier bridge DB1, the second terminal of capacitor C1, and the second terminals of varistor MOV2 and capacitor C2 are grounded. The second terminals of resistors R13, R14, R15, and capacitor C3 are connected to the first terminal of resistor R8. The second terminal of resistor R8 is connected to the reverse terminal of diode D3. The forward terminal of diode D3 is connected to the second terminal of capacitor C9 and the fourth pin of transformer T1. The second terminal of resistor R12 is connected to the first terminal of resistor R11. The second terminal of resistor R11 is connected to... Connect the first terminals of resistor R10, capacitor EC1, and capacitor C7 to the VDD pin of LED driver U1. Connect the GND pin of LED driver U1 to the second terminals of capacitor EC1 and capacitor C7 and ground. Connect the second terminal of resistor R10 to the reverse terminal of diode D1. Connect the forward terminal of diode D1 to the first terminal of resistor R3 and the second pin of transformer T1. Connect the second terminal of resistor R3 to the FB pin of LED driver U1 and the first terminals of resistors R1, R2, and capacitor C4. Connect the second terminals of resistors R1, R2, and capacitor C4 to ground. Connect the first pin of transformer T1 to the first terminal of capacitor C10 and ground. Connect the second terminal of capacitor C10 to the fourth pin of transformer T1 and the drain of NMOS transistor Q4. The gate of resistors R7 and R50 is connected to the first terminal of diode D2. The second terminal of resistor R7 is connected to the reverse terminal of diode D2 and the GATE pin of LED driver U1. The second terminal of resistor R50 is connected to the first terminals of resistors R16-R20, R46, and R47 and the source of NMOS transistor Q4. The second terminal of resistor R20 is connected to the first terminal of capacitor C8 and the CS pin of LED driver U1. The second terminals of resistors R16-R19, R46, and R47 are connected to the first terminals of capacitors C5 and C6, and the second terminal of capacitor C8, and grounded. The second terminal of capacitor C5 is connected to the first terminal of resistor R5. The second terminal of capacitor C6 is connected to the second terminal of resistor R5 and the CMP pin of LED driver U1.The third pin of transformer T1 is connected to capacitors CY1, EC2, and EC3, and the first terminal of resistor R9. The second terminal of CY1 is grounded. The fifth pin of transformer T1 is connected to the first terminal of capacitor C38 and the forward terminal of diode D9, serving as the monitoring voltage terminal SV+. The second terminal of capacitor C38 is connected to the first terminal of resistor R48. The second terminal of resistor R48 is connected to the second terminal of capacitors EC2 and EC3, the second terminal of resistor R9, and the reverse terminal of diode D9, serving as the constant voltage DC output terminal VOUT+.

[0041] Transformer T1 is wound with triple-insulated wire (primary-secondary insulation withstand voltage 4kV / min). Y capacitor CY1 (2.2nF / 3kV) forms a low-impedance loop with GND, limiting common-mode leakage current to <0.25mA (meeting IEC 60950 requirements). In the PCB layout, the high-voltage side (HV+) and low-voltage side (VOUT+) maintain an 8mm creepage distance, far exceeding the safety requirement of 6.4mm. The HV+ voltage is monitored in real-time through an R12-R15 voltage divider network. When the input exceeds 300V, D3 reverse breakdown triggers the FB pin of U1 to lock (response time <10μs). The CS pin (R16-R20 parallel sampling) achieves ±3% overcurrent protection, cutting off the drive within two switching cycles (approximately 30μs). The combination of LF1 (10mH) + LF2 (15mH) transmits 150kHz signals. Interference attenuation in the -10MHz band exceeds 60dB. CX1 (0.47μF) and R1A / R2A (470kΩ) form a symmetrical RC network to eliminate differential-mode noise (residual ripple <50mVpp). C3 (1nF) + R8 (10Ω) absorbs the leakage inductance spike of transformer T1 (peak voltage reduced from 800V to below 150V). Transformer T1 uses a copper foil shielding layer (0.1mm thick) to reduce the radiated field strength to below 30dBμV / m (30MHz test frequency). The GND network uses a star topology, with power ground (Q4 source) and control ground (U1) connected. A single-point connection (GND) is used to avoid ground loop interference. An active clamping circuit composed of D2 / R7 / Q4 ensures that Q4 conducts when the excitation current of transformer T1 crosses zero, reducing switching losses by 70%. U1 automatically switches between 65kHz / 130kHz dual-frequency modes according to load conditions, improving efficiency by 15% under light load (efficiency >85% under 5% load). The secondary side uses D9 (ultra-fast recovery diode, trr = 35ns) in parallel with R48 (10Ω), reducing rectification losses from 1.2W to 0.3W. Inductor L1 (220μH) shares a core with transformer T1, reducing core losses. 30%, the voltage loop (R3 / R1 / R2) and the current loop (R16-R20) work together to achieve a load regulation rate of ±1% (0-100% sudden change response time <200μs). C6 (100pF) + R5 (1kΩ) constitutes phase compensation to ensure that the loop works stably with a phase margin of -45°. Through the 600V withstand voltage design of MOV1 (470V) and Q4, it supports a global voltage input of 90-305VAC (traditional solutions are usually 180-265VAC). The input current THD is <10% (at full load of 230VAC) and meets the IEC 61000-3-2 Class C harmonic standard.

[0042] Furthermore, such as Figure 3As shown, the first constant voltage to constant current circuit includes: LED constant current controller U2, NMOS transistor Q1, diode D7, capacitor EC6, inductor L3, capacitor C13, capacitor C16, resistor R21, resistor R22, resistor R23, resistor R27, resistor R29, resistor R32, resistor R37, and resistor R38.

[0043] The first pin of the LED constant current controller U2 is connected to the gate of NMOS transistor Q1 through resistor R29. The second pin of the LED constant current controller U2 is connected to resistors R21-R23, capacitor EC6, capacitor C11, resistor C12, and the first terminal of capacitor CY1. The second terminal of capacitor EC6 is connected to the first terminal of resistor R27. The second terminal of resistor R27 is connected to inductor L3, the first terminal of capacitor EC5, and the cold light LED module. The second terminal of capacitor EC5 is connected to the constant voltage DC output terminal VOUT+. The second terminal of inductor L3 is connected to the first terminals of capacitors C13 and C16, the forward terminal of diode D7, and the drain of NMOS transistor Q1. The second terminal of capacitor C13 is connected to resistor R... The first terminal of resistor R32 is connected to the reverse terminal of diode D7 and the constant voltage DC output terminal VOUT+. The second terminal of capacitor C16 is connected to the first terminal of resistor R38. The second terminal of resistor R38 is connected to the first terminals of resistors R21 to R23, the source of NMOS transistor Q1, and the third pin of LED constant current controller U2. The fourth pin of LED constant current controller U2 is connected to the constant voltage DC output terminal VOUT+ through resistor R37. The fifth pin of LED constant current controller U2 is connected to the first PWM signal output terminal of the control circuit and the second terminal of resistor C12 through resistor R28. The sixth pin of LED constant current controller U2 is connected to the second terminal of capacitor C11.

[0044] R21-R23 (0.1Ω×3 in parallel) achieves ±0.5% current sampling accuracy with a temperature drift coefficient <50ppm / ℃; C16 (10nF) and R38 (1kΩ) form a lead compensation network to suppress current fluctuations caused by PWM dimming to within ±0.8%; U2 integrates a 12-bit DAC, which, together with external analog feedback (R37 / R28), achieves 0.1% dimming step accuracy; a 100kHz resonant network formed by L3 (47μH) and C13 (220nF) enables continuous dimming with a duty cycle of 0.1%-100% (compared to a minimum of 1% in traditional solutions); D7 (ultra-fast recovery diode, trr=25ns) ensures MOSFET... Q1 turns off at zero current, eliminating current tailing at low duty cycles; Three-stage filter design: First stage: L3 (47μH) suppresses low-frequency ripple below 100kHz (attenuation > 40dB); Second stage: C13 (220nF) + R32 (10Ω) absorbs switching noise (attenuation 30dB from 300kHz to 1MHz); Third stage: CY1 (2.2nF) filters common-mode interference (residual noise < 10mVpp); L3 uses an iron-silicon-aluminum magnetic core + copper foil shielding layer, reducing radiated EMI to 1 / 5 of the CLASS B limit; U2 has a built-in frequency dithering function (±5% switching frequency modulation), dispersing harmonic peak energy and reducing conducted interference by 6dB; R21-R23 use three 2512 package resistors in parallel, reducing thermal resistance by 67% and temperature rise < 15℃ (at full load); Q1 (60V / 30A) The MOSFET is directly connected to the heat dissipation copper foil, and the junction temperature is controlled below 85℃ (ambient temperature 40℃); the EC6 (100μF) energy storage capacitor can maintain power supply for 50ms to avoid current surge when hot-plugging LEDs; when the LED is disconnected, D7 / C13 form a freewheeling path to prevent the output voltage from soaring (limited to below 55V); when U2 detects that the CS pin voltage is >0.5V, it automatically enters hiccup mode (cycle 500ms), and the output resumes within 1ms after the short circuit is released.

[0045] Furthermore, such as Figure 3 As shown, the second constant voltage to constant current circuit includes: LED constant current controller U3, NMOS transistor Q2, inductor L4, diode D8, capacitor EC8, capacitor C14, capacitor C15, capacitor C18, resistor R24, resistor R25, resistor R26, resistor R30, resistor R33, resistor R34, resistor R39, resistor R41, and resistor R42.

[0046] The first pin of the LED constant current controller U3 is connected to the gate of NMOS transistor Q2 via resistor R30. The second pin of the LED constant current controller U3 is connected to resistors R24-R26, resistor R34, capacitor C18, resistor C17, and the first terminal of capacitor CY1. The second terminal of resistor R34 is connected to the first terminal of capacitor EC8. The second terminal of capacitor EC8 is connected to capacitor EC7, the first terminal of inductor L4, and the warm-light LED module. The second terminal of capacitor EC7 is connected to the constant voltage DC output terminal VOUT+. The second terminal of inductor L4 is connected to the first terminals of capacitors C14 and C15, the forward terminal of diode D8, and the drain of NMOS transistor Q2. The second terminal of capacitor C14 is connected to the first terminal of resistor R33. The second terminal is connected to the direction terminal of diode D8 and the constant voltage DC output terminal VOUT+. The second terminal of capacitor C15 is connected to the first terminal of resistor R39. The second terminal of resistor R39 is connected to the second terminals of resistors R24 to R26, the source of NMOS transistor Q2, and the third pin of LED constant current controller U3. The fourth pin of LED constant current controller U3 is connected to the first terminal of resistor R42. The second terminal of resistor R42 is connected to the constant voltage DC output terminal VOUT+. The fifth pin of LED constant current controller U3 is connected to the first terminal of resistor R41. The second terminal of resistor R41 is connected to the second terminal of resistor C17 and the second PWM signal output terminal of the control circuit. The sixth pin of LED constant current controller U3 is connected to the second terminal of capacitor C18.

[0047] Ambient temperature is monitored in real time via R41 / R42 (0.1% precision thin-film resistors), automatically correcting the drive current (compensation rate 0.2% / ℃) to ensure color temperature deviation ΔCCT < 30K (traditional solutions > 100K); the U3 has a built-in LED lifespan prediction model that gradually increases the drive current based on cumulative working time (compensation amount 0.5% / 1000 hours) to maintain constant luminous flux; analog voltage regulation is enabled when the duty cycle is >50% (Q2 gate voltage is adjusted via R30), and PWM dimming is switched when it is <50%, eliminating current nonlinearity in the mid-to-high brightness range (error reduced from ±3% to ±0.3%); warm light PWM signal ( The second PWM maintains a 180° phase difference with the cold light signal (first PWM) to suppress bus voltage fluctuations (ripple reduced by 60%); C14 (100pF) + R33 (10Ω) absorbs the Q2 switching spike (peak voltage reduced from 120V to 15V); EC8 (470μF) and L4 (68μH) form a low-pass filter with a cutoff frequency of 1kHz (attenuation >40dB); CY1 (2.2nF) and the PCB internal ground plane form a mirror capacitor to limit common-mode noise to below 10mVpp; U3 has built-in spread spectrum technology (±7.5% frequency jitter) to reduce conducted interference peak value by 8dBμV;

[0048] L4 is wound with nanocrystalline ribbon, and the radiated EMI is <25dBμV / m in the 30MHz band (10dB lower than the CLASS B limit); U3 monitors the PCB temperature through R24-R26 (NTC thermistors), and triggers soft shutdown when it is >105℃ (automatically recovers after cooling down to 85℃); when the voltage of C15 is <2V, U3 enters hiccup mode (operating cycle 1:4), and the short-circuit power consumption is reduced from 5W to 0.5W; D8 (60V TVS diode) clamps the output voltage when the LED is off to prevent MOSFET breakdown (limited voltage <55V); R24-R26 uses three resistors in parallel for sampling, and can still maintain ±2% current accuracy when a single resistor fails; Q2's drain is directly connected to the 2oz copper foil heat sink area, and the source is connected to the bottom heat sink pad through a via, reducing the thermal resistance to 0.8℃ / W.

[0049] Furthermore, such as Figure 4 As shown, the constant voltage regulator circuit includes: a switching buck constant voltage driver U5, a diode D6, an inductor L2, a ferrite bead B1, a ferrite bead B2, capacitors EC4, EC5, EC9, C31, C32, C26, C17, C28, resistors R55, R35, R36, R40, R51, R43, and R49;

[0050] The Vin pin of the switching buck-constant voltage driver U5 is connected to resistor R55, capacitor C31, capacitor EC4, the first terminal of ferrite bead B2, and the PAD pin of the switching buck-constant voltage driver U5. The GND pin of the switching buck-constant voltage driver U5 is connected to the first terminal of capacitor CY1. The EN pin of the switching buck-constant voltage driver U5 is connected to the second terminal of resistor R55, the first terminal of resistor R35, and the switch control terminal of the control circuit. The second terminal of resistor R35 is connected to the second terminals of capacitor C31 and capacitor EC4, the forward terminal of diode D6, capacitor EC5, capacitor C32, capacitor C26, and the first terminal of capacitor CY1. The second terminal of ferrite bead B2 is connected to capacitor EC9 and the first terminal of resistor R40. The second terminal of EC9 is connected to the first terminal of capacitor CY1. On one end, the second end of resistor R40 is connected to the constant voltage DC output terminal VOUT+. The second end of resistor R49 is connected to the first end of capacitor C17 and resistor R43. The second ends of capacitor C17, resistor R43, capacitor EC5, and capacitor C32 are connected to the first end of ferrite bead B1 and inductor L2. The second end of ferrite bead B1 is connected to the second end of capacitor C26 and serves as the first constant voltage output terminal. The second end of inductor L2 is connected to the first end of resistor R36, resistor R51, and capacitor C28, the reverse terminal of diode D6, and the SW pin of the switching buck constant voltage driver U5. The second ends of resistor R36 and resistor R51 are connected to the CS pin of the switching buck constant voltage driver U5. The second end of capacitor C28 is connected to the BS pin of the switching buck constant voltage driver U5.

[0051] By using U5 (supporting 4.5-60V input) in conjunction with D6 (60V withstand voltage Schottky diode), a wide voltage input of 9-57V can be achieved (traditional LDO solutions only support ≤36V); the voltage divider network composed of R35 / R55 monitors the input voltage in real time and automatically switches between Buck / Boost modes (switching time <10μs) to ensure that the output can still be maintained at 5V±1% when the input voltage drops to 6V.

[0052] The fourth-order filter architecture is as follows: First order: EC4 (470μF) suppresses low-frequency ripple (attenuation > 40dB at 100Hz); Second order: L2 (22μH) + C26 (10μF) form an LC filter with a cutoff frequency of 15kHz; Third order: ferrite bead B1 (100Ω@100MHz) filters out high-frequency switching noise (residual ripple < 5mVpp); Fourth order: C28 (1nF) absorbs ns-level voltage spikes.

[0053] The power ground (PAD pin of U5) and signal ground (CS pin) are isolated by a ferrite bead B2 (50Ω@1MHz), with common-mode noise suppression >60dB. The body diode conduction time of the internal MOSFET of U5 is <5ns, reducing the rectification loss from 0.7W (traditional asynchronous scheme) to 0.1W. The switching current slope is detected by R51 (0.1Ω), and the drive strength is dynamically adjusted (rise time optimized from 15ns to 8ns).

[0054] Furthermore, such as Figure 5 As shown, the power supply circuit of the control module includes: buck fast-shutdown regulator U4, diode D4, diode D5, inductor L5, capacitor EC10, capacitor EC11, capacitor C19, capacitor C20, capacitor C21, resistor R31, resistor R44, resistor R45, and resistor R54.

[0055] The first pin of the buck fast-shutdown regulator U4 is connected to the first terminal of capacitor C19. The second terminal of capacitor C19 is connected to the first terminal of inductor L5, the reverse terminal of diode D5, and the sixth pin of the buck fast-shutdown regulator U4. The forward terminal of diode D5 is connected to the first terminals of capacitor EC10 and capacitor CY1. The second terminal of capacitor EC10 is connected to the second terminal of inductor L5, capacitor C21, and the first terminal of resistor R45, serving as the second constant voltage output terminal. The second terminal of resistor R45 is connected to the second terminal of capacitor C21 and the first terminal of resistor R44. One end of the buck fast-shutdown regulator U4 is connected to the third pin. The second end of resistor R44 is connected to the first end of capacitor CY1 and the second pin of buck fast-shutdown regulator U4. The fifth pin of buck fast-shutdown regulator U4 is connected to the first end of resistor R54. The second end of resistor R54 is connected to capacitor C20, capacitor EC11, and the first end of resistor R31. The second end of R31 is connected to the reverse terminal of diode D4. The forward terminal of diode D4 is connected to the monitoring voltage terminal SV+. The second ends of capacitor C20 and capacitor EC11 are connected to capacitor CY1.

[0056] Supports 9-36V input range (via D4's 60V withstand voltage design), adaptable to different monitoring voltage sources (such as 12V / 24V industrial buses or 48V PoE); synchronous rectification architecture (U4 built-in MOSFET) achieves 95% conversion efficiency (12V→5V / 2A operation), a 137% improvement over traditional linear solutions (efficiency ≤40%); EC10 (470μF) filters low-frequency ripple (100Hz attenuation >50dB), L5 (22μH) suppresses high-frequency harmonics (1MHz attenuation >40dB), C21 (10μF) MLCC (Multi-Layer Cylinder) eliminates ns-level spikes (residual ripple < 5mVpp), R44 / R45 (0.1% accuracy) voltage divider network achieves ±0.8% voltage accuracy, independent ground plane design (via CON3 pin 2), common-mode noise < 1mV, U4 has built-in ripple injection technology, and phase compensation is formed by C20 (1nF) and R54 (10kΩ), reducing the 100kHz switching ripple from 120mVpp to 8mVpp, and inductor L5 is magnetically coupled to transformer T1 to achieve fast feedback across the isolation barrier (delay < 200ns).

[0057] Furthermore, such as Figure 5 As shown, the power supply circuit of the control module also includes: a power strip CON3, whose first, second, third, fourth, fifth, sixth and seventh pins are respectively connected to the second constant voltage, the first pin of capacitor CY1, the first constant voltage, the RGB signal, the switch signal, the first PWM signal and the second PWM signal.

[0058] The above description is merely a preferred embodiment of the present utility model and does not constitute any limitation on the technical scope of the present utility model. Therefore, any minor modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present utility model shall still fall within the scope of the technical solution of the present utility model.

Claims

1. A dimming and color-tuning control circuit, characterized in that, include: AC to DC step-down constant voltage isolation circuit, first constant voltage to constant current circuit, second constant voltage to constant current circuit, constant voltage regulator circuit, control module power supply circuit, control circuit, cold light LED module, warm light LED module and RGB color module; The AC-to-DC step-down constant voltage isolation circuit has an input terminal connected to AC mains power and an output terminal that outputs isolated constant voltage DC power, which powers the first constant voltage to constant current circuit, the second constant voltage to constant current circuit, the constant voltage regulator circuit, and the control module power supply circuit. The control circuit outputs a first PWM signal to the first constant voltage to constant current circuit, outputs a second PWM signal to the second constant voltage to constant current circuit, outputs an RGB signal to the RGB module, and outputs a switching signal to the constant voltage regulator circuit, and the sum of the duty cycles of the first PWM signal and the second PWM signal does not exceed 100%. The first constant voltage to constant current circuit is connected to the cold light LED module and adjusts the constant drive current output to the cold light LED module according to the duty cycle of the first PWM signal. The second constant voltage to constant current circuit is connected to the warm light LED module and adjusts the constant drive current output to the warm light LED module according to the duty cycle of the second PWM signal. The constant voltage regulator circuit converts the constant DC voltage output by the AC-to-DC step-down constant voltage isolation circuit into a first constant voltage and supplies power to the control circuit. The power supply circuit of the control module converts the monitoring voltage output by the AC-to-DC step-down constant voltage isolation circuit into a second constant voltage and supplies power to the control circuit.

2. The dimming and color-tuning control circuit according to claim 1, characterized in that, The AC-to-DC step-down constant voltage isolation circuit includes: LED driver U1, varistor MOV1, varistor MOV2, thermal relay F1, common mode inductor LF1, common mode inductor LF2, rectifier bridge DB1, inductor L1, diode D1, diode D2, diode D3, diode D9, NMOS transistor Q4, transformer T1, capacitor CY1, capacitor CX1, capacitor EC1, capacitor EC2, capacitor EC3, capacitor C1, capacitor C2, capacitor C3, capacitor C4, capacitor C5, and capacitor C6.

6. Capacitors C7, C8, C9, C10, C38; Resistors R1A, R2A, R1, R2, R3, R4, R5, R6, R7, R8, R9, R10, R11, R12, R13, R14, R15, R16, R17, R18, R19, R20, R46, R47, R48, R50; The mains power live wire is connected to the first terminal of the varistor MOV1 and the first pin of the common-mode inductor LF1 via the thermal relay F1. The mains power neutral wire is connected to the second pin of the common-mode inductor LF1. The third pin of the common-mode inductor LF1 is connected to the capacitor CX1, the first terminal of the resistor R1A, and the first pin of the common-mode inductor LF2. The fourth pin of the common-mode inductor LF1 is connected to the capacitor CX1, the second terminal of the resistor R2A, and the second pin of the common-mode inductor LF2. The second terminal of the resistor R1A is connected to the first terminal of the resistor R2A. The third pin of the common-mode inductor LF2 is connected to the first pin of the rectifier bridge DB1. The fourth pin of the common-mode inductor LF2 is connected to... The second and third pins of rectifier bridge DB1 are connected to the first terminals of capacitor C1, resistor R4, and inductor L1. The second terminals of resistor R4 and inductor L1 are connected to the first terminals of varistor MOV2, capacitor C2, resistor R12, resistor R13, resistor R14, resistor R15, capacitor C3, capacitor C9, and the sixth pin of transformer T1 as the high-voltage input terminal HV+. The fourth pin of rectifier bridge DB1, the second terminal of capacitor C1, and the second terminals of varistor MOV2 and capacitor C2 are grounded. The second terminals of resistor R13, resistor R14, resistor R15, and capacitor C3 are connected to the second terminals of capacitor C1. The first terminal of resistor R8 is connected, the second terminal of resistor R8 is connected to the reverse terminal of diode D3, the forward terminal of diode D3 is connected to the second terminal of capacitor C9 and the fourth pin of transformer T1, the second terminal of resistor R12 is connected to the first terminal of resistor R11, the second terminal of resistor R11 is connected to resistor R10, capacitor EC1, the first terminal of capacitor C7 and the VDD pin of LED driver U1, the GND pin of LED driver U1 is connected to the second terminals of capacitor EC1 and capacitor C7 and grounded, the second terminal of resistor R10 is connected to the reverse terminal of diode D1, and the forward terminal of diode D1 is connected to the first terminal of resistor R3 and the fourth pin of transformer T1. The second pin of transformer T1 is connected to the second terminal of resistor R3, which is connected to the FB pin of LED driver U1 and the first terminals of resistors R1, R2, and C4. The second terminals of resistors R1, R2, and C4 are grounded. The first pin of transformer T1 is connected to the first terminal of capacitor C10 and grounded. The second terminal of capacitor C10 is connected to the fourth pin of transformer T1 and the drain of NMOS transistor Q4. The gate of NMOS transistor Q4 is connected to the first terminals of resistors R7 and R50 and the forward terminal of diode D2. The second terminal of resistor R7 is connected to the reverse terminal of diode D2 and the GATE pin of LED driver U1.The second end of resistor R50 is connected to the first ends of resistors R16-R20, resistor R46, and resistor R47, and the source of NMOS transistor Q4. The second end of resistor R20 is connected to the first end of capacitor C8 and the CS pin of LED driver U1. The second ends of resistors R16-R19, resistor R46, and resistor R47 are connected to the first ends of capacitors C5 and C6, and the second end of capacitor C8, and are grounded. The second end of capacitor C5 is connected to the first end of resistor R5. The second end of capacitor C6 is connected to the second end of resistor R5 and the LED. The CMP pin of driver U1 is connected to the third pin of transformer T1, which is connected to the first terminal of capacitors CY1, EC2, and EC3, and resistor R9. The second terminal of CY1 is grounded. The fifth pin of transformer T1 is connected to the first terminal of capacitor C38 and the forward terminal of diode D9, serving as the monitoring voltage terminal SV+. The second terminal of capacitor C38 is connected to the first terminal of resistor R48, and the second terminal of resistor R48 is connected to the second terminal of capacitors EC2 and EC3, the second terminal of resistor R9, and the reverse terminal of diode D9, serving as the constant voltage DC output terminal VOUT+.

3. The dimming and color-tuning control circuit according to claim 2, characterized in that, The first constant voltage to constant current circuit includes: LED constant current controller U2, NMOS transistor Q1, diode D7, capacitor EC6, inductor L3, capacitor C13, capacitor C16, resistor R21, resistor R22, resistor R23, resistor R27, resistor R29, resistor R32, resistor R37, and resistor R38. The first pin of the LED constant current controller U2 is connected to the gate of the NMOS transistor Q1 through the resistor R29. The second pin of the LED constant current controller U2 is connected to the first terminals of the resistors R21-R23, the capacitor EC6, the capacitor C11, the resistor C12, and the capacitor CY1. The second terminal of the capacitor EC6 is connected to the first terminal of the resistor R27. The second terminal of the resistor R27 is connected to the first terminal of the inductor L3, the capacitor EC5, and the cold light LED module. The second terminal of the capacitor EC5 is connected to the constant voltage DC output terminal VOUT+. The second terminal of the inductor L3 is connected to the first terminals of the capacitors C13 and C16, the forward terminal of the diode D7, and the drain of the NMOS transistor Q1. The second terminal of the capacitor C13 is connected to... The first terminal of resistor R32 is connected to the first terminal of resistor R32. The second terminal of resistor R32 is connected to the reverse terminal of diode D7 and the constant voltage DC output terminal VOUT+. The second terminal of capacitor C16 is connected to the first terminal of resistor R38. The second terminal of resistor R38 is connected to the first terminals of resistors R21 to R23, the source of NMOS transistor Q1, and the third pin of LED constant current controller U2. The fourth pin of LED constant current controller U2 is connected to the constant voltage DC output terminal VOUT+ through resistor R37. The fifth pin of LED constant current controller U2 is connected to the first PWM signal output terminal of the control circuit and the second terminal of resistor C12 through resistor R28. The sixth pin of LED constant current controller U2 is connected to the second terminal of capacitor C11.

4. The dimming and color-tuning control circuit according to claim 2, characterized in that, The second constant voltage to constant current circuit includes: LED constant current controller U3, NMOS transistor Q2, inductor L4, diode D8, capacitor EC8, capacitor C14, capacitor C15, capacitor C18, resistor R24, resistor R25, resistor R26, resistor R30, resistor R33, resistor R34, resistor R39, resistor R41, and resistor R42. The first pin of the LED constant current controller U3 is connected to the gate of the NMOS transistor Q2 through resistor R30. The second pin of the LED constant current controller U3 is connected to resistors R24-R26, resistor R34, capacitor C18, resistor C17, and the first terminal of capacitor CY1. The second terminal of resistor R34 is connected to the first terminal of capacitor EC8. The second terminal of capacitor EC8 is connected to capacitor EC7, the first terminal of inductor L4, and the warm light LED module. The second terminal of capacitor EC7 is connected to the constant voltage DC output terminal VOUT+. The second terminal of inductor L4 is connected to the first terminals of capacitors C14 and C15, the forward terminal of diode D8, and the drain of NMOS transistor Q2. The second terminal of capacitor C14 is connected to the first terminal of resistor R33. The second terminal of R33 is connected to the directional terminal of diode D8 and the constant voltage DC output terminal VOUT+. The second terminal of capacitor C15 is connected to the first terminal of resistor R39. The second terminal of resistor R39 is connected to the second terminals of resistors R24 to R26, the source of NMOS transistor Q2, and the third pin of LED constant current controller U3. The fourth pin of LED constant current controller U3 is connected to the first terminal of resistor R42. The second terminal of resistor R42 is connected to the constant voltage DC output terminal VOUT+. The fifth pin of LED constant current controller U3 is connected to the first terminal of resistor R41. The second terminal of resistor R41 is connected to the second terminal of resistor C17 and the second PWM signal output terminal of the control circuit. The sixth pin of LED constant current controller U3 is connected to the second terminal of capacitor C18.

5. The dimming and color-tuning control circuit according to claim 2, characterized in that, The constant voltage regulator circuit includes: a switching buck constant voltage driver U5, a diode D6, an inductor L2, a ferrite bead B1, a ferrite bead B2, a capacitor EC4, a capacitor EC5, a capacitor EC9, a capacitor C31, a capacitor C32, a capacitor C26, a capacitor C17, a capacitor C28, a resistor R55, a resistor R35, a resistor R36, a resistor R40, a resistor R51, a resistor R43, and a resistor R49; The Vin pin of the switching buck constant voltage driver U5 is connected to the resistor R55, the capacitor C31, the capacitor EC4, the first terminal of the ferrite bead B2, and the PAD pin of the switching buck constant voltage driver U5. The GND pin of the switching buck constant voltage driver U5 is connected to the first terminal of the capacitor CY1. The EN pin of the switching buck constant voltage driver U5 is connected to the second terminal of the resistor R55, the first terminal of the resistor R35, and the switch control terminal of the control circuit. The second terminal of the resistor R35 is connected to the second terminals of the capacitors C31 and EC4, the forward terminal of the diode D6, the capacitor EC5, C32, C26, and the first terminal of the capacitor CY1. The second terminal of the ferrite bead B2 is connected to the capacitor EC9 and the first terminal of the resistor R40. The second terminal of the EC9 is connected to the capacitor CY1. Firstly, the second end of resistor R40 is connected to the constant voltage DC output terminal VOUT+; the second end of resistor R49 is connected to the first end of capacitor C17 and resistor R43; the second ends of capacitor C17, resistor R43, capacitor EC5, and capacitor C32 are connected to the first end of ferrite bead B1 and inductor L2; the second end of ferrite bead B1 is connected to the second end of capacitor C26 and serves as the first constant voltage output terminal; the second end of inductor L2 is connected to the first end of resistor R36, resistor R51, and capacitor C28, the reverse terminal of diode D6, and the SW pin of the switching buck constant voltage driver U5; the second ends of resistor R36 and resistor R51 are connected to the CS pin of the switching buck constant voltage driver U5; and the second end of capacitor C28 is connected to the BS pin of the switching buck constant voltage driver U5.

6. The dimming and color-tuning control circuit according to claim 2, characterized in that, The power supply circuit of the control module includes: buck fast-shutdown regulator U4, diode D4, diode D5, inductor L5, capacitor EC10, capacitor EC11, capacitor C19, capacitor C20, capacitor C21, resistor R31, resistor R44, resistor R45, and resistor R54. The first pin of the buck fast-shutdown regulator U4 is connected to the first terminal of capacitor C19. The second terminal of capacitor C19 is connected to the first terminal of inductor L5, the reverse terminal of diode D5, and the sixth pin of the buck fast-shutdown regulator U4. The forward terminal of diode D5 is connected to the first terminal of capacitor EC10 and capacitor CY1. The second terminal of capacitor EC10 is connected to the second terminal of inductor L5, capacitor C21, and the first terminal of resistor R45, serving as the second constant voltage output terminal. The second terminal of resistor R45 is connected to the second terminal of capacitor C21 and the first terminal of resistor R44. The third pin of the buck fast-shutdown regulator U4 is connected to the third pin of the buck fast-shutdown regulator U4. The second pin of the buck fast-shutdown regulator U4 is connected to the first pin of the first pin of the first pin of the second pin of the first pin of the second pin of the second pin of the second pin of the second pin of the second pin of the second pin of the second pin of the second pin of the second pin of the second pin of the second pin of the third pin of the second pin of the first ...

7. The dimming and color-tuning control circuit according to claim 6, characterized in that, The power supply circuit of the control module also includes a power strip CON3, whose first, second, third, fourth, fifth, sixth, and seventh pins are respectively connected to the second constant voltage, the first pin of capacitor CY1, the first constant voltage, the RGB signal, the switch signal, the first PWM signal, and the second PWM signal.

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