LED light-adjusting driving power supply device

Abstract

This utility model discloses a driving power supply, belonging to the technical field of LED dimming devices, specifically relating to an LED dimming driver power supply device, including an input rectifier module, a flyback isolation circuit, a DC-DC constant current circuit, a microcontroller control module, and three dimming interfaces. The three dimming modes include: thyristor phase-cut dimming, 0-10V analog dimming, and PC-programmed dimming, with the microcontroller coordinating to allow only one dimming mode to be active at a time. The flyback isolation circuit and DC-DC constant current circuit, in conjunction with a phase detection circuit and a dimming signal isolation circuit, achieve smooth dimming and multi-mode compatibility. This utility model, by integrating multiple dimming modes and optimizing the circuit structure, reduces cost and size, and improves dimming adaptability and stability.

Description

Technical Field

[0001] This utility model discloses a driving power supply, belonging to the technical field of LED dimming devices, specifically relating to an LED dimming driving power supply device. Background Technology

[0002] An LED dimming driver is a power supply device that can adjust the brightness of LED lamps, mainly by adjusting the current or voltage to achieve the dimming function. LED dimming drivers are widely used in smart homes, commercial lighting, and indoor lighting.

[0003] LED dimming principle: LED dimming is mainly achieved by adjusting the current or voltage of the LED lamp. Traditional LED dimming driver power supplies mainly use the following methods:

[0004] DALI dimming: DALI (Digital Addressable Lighting Interface) dimming systems are suitable for scene control. Each luminaire has an independent address and can be flexibly grouped via the DALI bus to achieve control and management for different scenes. The advantages of DALI dimming include digital dimming, precise, stable, and smooth dimming, two-way communication, flexible control, and strong anti-interference capabilities.

[0005] SCR dimming: SCR dimming adjusts the voltage by controlling the phase angle of the alternating current, thereby controlling the brightness of the light. This dimming method still dominates the indoor lighting market in Europe and America, but its disadvantages include harmonic pollution to the power grid and low energy efficiency.

[0006] PWM dimming: PWM (Pulse Width Modulation) dimming controls the brightness of LED lights by adjusting the pulse width. This method achieves high-precision dimming and has minimal impact on the lifespan of LED lights.

[0007] 0 / 1-10V dimming: The brightness of the LED light is controlled by adjusting the voltage from 0 to 10 volts. This dimming method is simple and easy to use, suitable for applications requiring only basic dimming.

[0008] DMX dimming: DMX (Digital Multiplex) dimming controls multiple LEDs via digital signals, making it suitable for complex lighting control systems and enabling precise control of lighting effects.

[0009] However, traditional LED dimming drivers typically only support a single dimming mode (such as SCR or 0-10V), failing to meet the diverse needs of various scenarios. Furthermore, existing SCR dimming solutions suffer from poor compatibility and uneven dimming, while multi-mode integrated solutions often increase cost and size due to circuit complexity. Utility Model Content

[0010] Purpose of the utility model: To provide an LED dimming driver power supply device to solve the problems mentioned above.

[0011] Technical solution: An LED dimming driver power supply device, comprising: an input rectifier circuit for converting AC power to DC power;

[0012] A flyback isolation circuit, the input of which is connected to the input rectifier circuit;

[0013] The input terminal of the DC-DC constant current circuit is connected to the output terminal of the flyback isolation circuit, and the dimming signal pin is connected to the dimming interface through the isolation circuit.

[0014] The microcontroller is used to coordinate dimming mode switching and signal processing.

[0015] Three dimming interfaces are included:

[0016] The thyristor phase-cut dimming interface is composed of a thyristor dimmer and transmits the phase-cut angle signal to the microcontroller through a phase detection circuit.

[0017] A 0-10V analog dimming interface is used, and the input signal is transmitted to the microcontroller after being regulated by the auxiliary power supply circuit.

[0018] The PC programming dimming interface connects to external devices via a USB communication circuit.

[0019] In a further embodiment, the output of the DC-DC constant current circuit is connected to an LED module.

[0020] In a further embodiment, the phase detection circuit of the thyristor phase-cut dimming interface includes an operational amplifier U12, which is used to detect the phase-cutting start point and duration of the input voltage, and transmits the signal to the microcontroller through an optocoupler U11.

[0021] In a further embodiment, the auxiliary power supply circuit of the 0-10V analog dimming interface includes a voltage regulator chip to provide a stable 3.3V reference voltage for the dimming signal.

[0022] In a further embodiment, a blood-sucking circuit is provided between the flyback isolation circuit and the DC-DC constant current circuit, consisting of MOSFET Q3 and resistors R32 and R35, to improve the compatibility of the SCR dimmer.

[0023] In a further embodiment, the phase detection circuit includes: amplifier U11, Zener diode DZ10, opto-isolator U12, capacitor C30, capacitor C42, capacitor C28, capacitor C27, capacitor C9, resistor R50, resistor R51, resistor R52, resistor R53, resistor R54, resistor R55, resistor R56, resistor R85, resistor R86, resistor R87, and resistor R57.

[0024] One end of resistor R50 is connected to the input rectifier circuit, and the other end is connected to one end of resistor R51. One end of resistor R52 is connected to the other end of resistor R51. The negative terminal of the Zener diode DZ10 is simultaneously connected to the other end of resistor R52, one end of resistor R53, and one end of resistor R54. Pin 3 of amplifier U11 is connected to one end of resistor R51, and pin 2 is simultaneously connected to one end of resistor R85, one end of resistor R86, and one end of capacitor C42. The other end of resistor R56 is simultaneously connected to the other end of resistor R54, one end of resistor R55, and one end of capacitor C30. Pin 1 of amplifier U11... Pin 8 is connected to one end of resistor R87, and pin 8 is connected to one end of capacitor C28 and one end of capacitor C27. Pin 1 of opto-isolator U12 is connected, pin 4 is connected to 3.3V, and pin 3 is connected to resistor R57 and connected to the microcontroller. Pins 4, 5, and 6 of amplifier U11 are connected to the positive terminal of Zener diode DZ10, the other end of resistor R53, the other end of resistor R55, the other end of capacitor C30, the other end of resistor R86, the other end of capacitor C42, the other end of capacitor C28, the other end of capacitor C27, the other end of capacitor C9, and pin 2 of opto-isolator U12 and grounded.

[0025] In a further embodiment, the auxiliary power supply circuit includes: diode D12, capacitor C35, resistor R67, resistor R68, resistor R70, resistor R69, capacitor C34, capacitor C36, resistor R71, Zener diode DZ8, reverse diode BD3, reverse diode BD4, and voltage regulator U15.

[0026] Pin 1 of diode D12 and one end of capacitor C35 are connected to the microcontroller. Pin 2 of voltage regulator U15 is connected to pin 2 of diode D12. Pin 1 is simultaneously connected to one end of resistor R67, one end of resistor R68, one end of capacitor C34, one end of resistor R71, and the negative terminal of Zener diode DZ8. Pin 3 is simultaneously connected to the other end of resistor R67 and the other end of resistor R34. One end of resistor R69 is connected to the microcontroller, and the other end is simultaneously connected to the other end of resistor R68, one end of resistor R70, and one end of capacitor C36. The other end of resistor R71 is connected to one end of reverse diode BD3. The other end of reverse diode BD3 is connected to drive LED WIRE3. The other end of resistor R10 is also connected to the other end of capacitor C35, the other end of capacitor C36, the positive terminal of Zener diode DZ8, and one end of reverse diode BD4. The other end of reverse diode BD4 is connected to drive LED WIRE4.

[0027] In a further embodiment, the USB communication circuit includes: amplifier U10, MOSFET U13, resistors R74, R75, R76, R77, R78, R79, R80, R81, R82, R83, R84, capacitors C45, C43, C44, C46, ​​diode D11, and diode D10;

[0028] Amplifier U10 has pin 4 connected to one end of resistor R74 and one end of resistor R75, and connected to a microcontroller; pin 1 connected to one end of resistor R76, the other end of resistor R74, one end of capacitor C44, and one end of resistor R78; pin 3 connected to one end of resistor R79, one end of capacitor C43, the cathode of diode D11, and one end of capacitor C46; and pin 5 connected to the other end of resistor R75 and one end of capacitor C45, and connected to a 3.3V voltage. MOSFET U13 has pins 1 and 4 connected to one end of resistor R82, the other end of capacitor C46, ​​the anode of diode D11, the other end of resistor R79, and resistor R78. The other end of the capacitor is connected to the other end of capacitor C44 and capacitor C45. The other end of capacitor C43 is connected to resistor R77. Pin 6 of MOSFET U13 is connected to one end of resistor R80 and one end of resistor R81. The other end of resistor R81 is connected to the other end of resistor R82. The other end of resistor R80 is connected to the positive terminal of diode D10. The negative terminal of diode D10 receives the input voltage. Pin 5 of MOSFET U13 is connected to one end of resistor R84 and connected to the microcontroller. Pins 2 and 3 of MOSFET U13 are connected to one end of resistor R83. The other ends of resistor R84 and resistor R83 receive a 3.3V voltage.

[0029] In a further embodiment, the microcontroller and the DC-DC constant current circuit are provided with a conversion isolation circuit; the conversion isolation circuit converts the PWM signal into an isolated input to the DC-DC constant current circuit; the conversion isolation circuit includes: an opto-isolator U3, a resistor R28, a capacitor C16, a resistor R10, and a MOSFET Q6;

[0030] Pin 1 of the opto-isolator U3 is connected to the microcontroller to input the PWM signal; pin 2 is grounded; pin 3 is connected to one end of capacitor C16 and pin 2 of MOSFET Q6 and is also grounded; pin 4 is connected to one end of resistor R28, the other end of capacitor C16, and pin 1 of MOSFET Q6. Pin 3 of MOSFET Q6 outputs the PWM1 signal to the DC-DC constant current circuit and is connected to one end of resistor R10. The other end of resistor R10 and the other end of resistor R28 input a 12V voltage.

[0031] Beneficial effects: This invention provides a multi-mode LED driver power supply integrating SCR phase-cut dimming, 0-10V analog dimming, and PC programmable dimming. Through optimized flyback isolation + DC-DC constant current architecture, combined with microcontroller coordinated control, it achieves low cost, small size, and high compatibility. Specific performance is as follows:

[0032] 1. Three dimming modes are integrated to adapt to different scene requirements;

[0033] 2. Unique phase detection circuit and blood-absorbing circuit enhance the compatibility of SCR dimming;

[0034] 3. The two-stage architecture of flyback isolation circuit + DC-DC constant current circuit optimizes cost and size;

[0035] 4. The microcontroller intelligently switches modes to avoid signal conflicts. Attached Figure Description

[0036] Figure 1 This is a schematic diagram of the structure of this utility model.

[0037] Figure 2 This is a schematic diagram of the input rectifier circuit of this utility model.

[0038] Figure 3 This is a circuit diagram of the flyback isolation circuit and the DC-DC constant current circuit of this utility model.

[0039] Figure 4 This is a schematic diagram of the conversion isolation circuit of this utility model.

[0040] Figure 5 This is a schematic diagram of the microcontroller of this utility model.

[0041] Figure 6 This is a schematic diagram of the auxiliary power supply circuit for the 0-10V analog dimming interface of this utility model.

[0042] Figure 7 This is a schematic diagram of the PC programming dimming interface USB communication circuit of this utility model.

[0043] Figure 8 This is a schematic diagram of the phase detection circuit of the silicon controlled rectifier phase-cut dimming interface of this utility model. Detailed Implementation

[0044] The technical solution of this utility model will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0045] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0046] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances. Furthermore, the technical features involved in the different embodiments of this utility model described below can be combined with each other as long as they do not conflict with each other.

[0047] An LED dimming driver power supply device, such as Figure 1 As shown, it includes: an input rectifier circuit for converting alternating current (AC) to direct current (DC);

[0048] A flyback isolation circuit, the input of which is connected to the input rectifier circuit;

[0049] The input terminal of the DC-DC constant current circuit is connected to the output terminal of the flyback isolation circuit, and the dimming signal pin is connected to the dimming interface through the isolation circuit.

[0050] The microcontroller is used to coordinate dimming mode switching and signal processing.

[0051] Three dimming interfaces are included:

[0052] The thyristor phase-cut dimming interface is composed of a thyristor dimmer and transmits the phase-cut angle signal to the microcontroller through a phase detection circuit.

[0053] A 0-10V analog dimming interface is used, and the input signal is transmitted to the microcontroller after being regulated by the auxiliary power supply circuit.

[0054] The PC programming dimming interface connects to external devices via a USB communication circuit.

[0055] In one embodiment, such as Figure 1 As shown, the output terminal of the DC-DC constant current circuit is connected to the LED module.

[0056] In one embodiment, such as Figure 8 As shown, the phase detection circuit of the thyristor phase-cut dimming interface includes an operational amplifier U12, which is used to detect the phase-cutting start point and duration of the input voltage, and transmits the signal to the microcontroller through an optocoupler U11.

[0057] In one embodiment, such as Figure 6 As shown, the auxiliary power supply circuit of the 0-10V analog dimming interface includes a voltage regulator chip to provide a stable 3.3V reference voltage for the dimming signal.

[0058] In one embodiment, such as Figure 8 As shown, a blood-sucking circuit is provided between the flyback isolation circuit and the DC-DC constant current circuit, which consists of MOSFET Q3 and resistors R32 and R35, and is used to improve the compatibility of the SCR dimmer.

[0059] In one embodiment, such as Figure 8 As shown, the phase detection circuit includes: amplifier U11, Zener diode DZ10, opto-isolator U12, capacitor C30, capacitor C42, capacitor C28, capacitor C27, capacitor C9, resistor R50, resistor R51, resistor R52, resistor R53, resistor R54, resistor R55, resistor R56, resistor R85, resistor R86, resistor R87, and resistor R57.

[0060] One end of resistor R50 is connected to the input rectifier circuit, and the other end is connected to one end of resistor R51. One end of resistor R52 is connected to the other end of resistor R51. The negative terminal of the Zener diode DZ10 is simultaneously connected to the other end of resistor R52, one end of resistor R53, and one end of resistor R54. Pin 3 of amplifier U11 is connected to one end of resistor R51, and pin 2 is simultaneously connected to one end of resistor R85, one end of resistor R86, and one end of capacitor C42. The other end of resistor R56 is simultaneously connected to the other end of resistor R54, one end of resistor R55, and one end of capacitor C30. Pin 1 of amplifier U11... Pin 8 is connected to one end of resistor R87, and pin 8 is connected to one end of capacitor C28 and one end of capacitor C27. Pin 1 of opto-isolator U12 is connected, pin 4 is connected to 3.3V, and pin 3 is connected to resistor R57 and connected to the microcontroller. Pins 4, 5, and 6 of amplifier U11 are connected to the positive terminal of Zener diode DZ10, the other end of resistor R53, the other end of resistor R55, the other end of capacitor C30, the other end of resistor R86, the other end of capacitor C42, the other end of capacitor C28, the other end of capacitor C27, the other end of capacitor C9, and pin 2 of opto-isolator U12 and grounded.

[0061] Specifically, amplifier U11 (LM2904) is used. It determines whether the input voltage has started to switch phase and the duration of the phase switching, thus knowing how much phase is switched. The signal is transmitted to the microcontroller through opto-isolator U12 to adjust the output current and achieve the purpose of dimming.

[0062] If the phase-cutting test is detected, causing MOSFET Q3 to conduct, resistors R32 and R35 are connected to the circuit as a load through opto-isolator U17, improving the dimmer's compatibility.

[0063] In one embodiment, such as Figure 7 As shown, the auxiliary power supply circuit includes: diode D12, capacitor C35, resistor R67, resistor R68, resistor R70, resistor R69, capacitor C34, capacitor C36, resistor R71, Zener diode DZ8, reverse diode BD3, reverse diode BD4, and voltage regulator U15.

[0064] Pin 1 of diode D12 and one end of capacitor C35 are connected to the microcontroller. Pin 2 of voltage regulator U15 is connected to pin 2 of diode D12. Pin 1 is simultaneously connected to one end of resistor R67, one end of resistor R68, one end of capacitor C34, one end of resistor R71, and the negative terminal of Zener diode DZ8. Pin 3 is simultaneously connected to the other end of resistor R67 and the other end of resistor R34. One end of resistor R69 is connected to the microcontroller, and the other end is simultaneously connected to the other end of resistor R68, one end of resistor R70, and one end of capacitor C36. The other end of resistor R71 is connected to one end of reverse diode BD3. The other end of reverse diode BD3 is connected to drive LED WIRE3. The other end of resistor R10 is also connected to the other end of capacitor C35, the other end of capacitor C36, the positive terminal of Zener diode DZ8, and one end of reverse diode BD4. The other end of reverse diode BD4 is connected to drive LED WIRE4.

[0065] In one embodiment, such as Figure 7 As shown, the USB communication circuit includes: amplifier U10, MOSFET U13, resistors R74, R75, R76, R77, R78, R79, R80, R81, R82, R83, R84, capacitors C45, C43, C44, C46, ​​diode D11, and diode D10;

[0066] Amplifier U10 has pin 4 connected to one end of resistor R74 and one end of resistor R75, and connected to a microcontroller; pin 1 connected to one end of resistor R76, the other end of resistor R74, one end of capacitor C44, and one end of resistor R78; pin 3 connected to one end of resistor R79, one end of capacitor C43, the cathode of diode D11, and one end of capacitor C46; and pin 5 connected to the other end of resistor R75 and one end of capacitor C45, and connected to a 3.3V voltage. MOSFET U13 has pins 1 and 4 connected to one end of resistor R82, the other end of capacitor C46, ​​the anode of diode D11, the other end of resistor R79, and resistor R78. The other end of the capacitor is connected to the other end of capacitor C44 and capacitor C45. The other end of capacitor C43 is connected to resistor R77. Pin 6 of MOSFET U13 is connected to one end of resistor R80 and one end of resistor R81. The other end of resistor R81 is connected to the other end of resistor R82. The other end of resistor R80 is connected to the positive terminal of diode D10. The negative terminal of diode D10 receives the input voltage. Pin 5 of MOSFET U13 is connected to one end of resistor R84 and connected to the microcontroller. Pins 2 and 3 of MOSFET U13 are connected to one end of resistor R83. The other ends of resistor R84 and resistor R83 receive a 3.3V voltage.

[0067] In one embodiment, such as Figure 4 As shown, the microcontroller and the DC-DC constant current circuit are provided with a conversion isolation circuit; the conversion isolation circuit converts the PWM signal into an isolated input to the DC-DC constant current circuit; the conversion isolation circuit includes: opto-isolator U3, resistor R28, capacitor C16, resistor R10, and MOSFET Q6;

[0068] The opto-isolator U3 has the following pins: pin 1 is connected to the microcontroller to input the PWM signal; pin 2 is grounded; pin 3 is connected to one end of capacitor C16 and pin 2 of MOSFET Q6, and is also grounded; pin 4 is connected to one end of resistor R28, the other end of capacitor C16, and pin 1 of MOSFET Q6. Pin 3 of MOSFET Q6 outputs a PWM1 signal to the DC-DC constant current circuit and is connected to one end of resistor R10. The other ends of resistor R10 and resistor R28 receive a 12V voltage input.

[0069] In one embodiment, such as Figure 2As shown, the input rectifier circuit includes: fuse F1, adjustable resistor RV1, inductor LF1, capacitor CX1, resistor R101, resistor R102, capacitor C7, resistor R31, inductor LF2, capacitor CX2, capacitor CY3, capacitor CY4, resistor R103, resistor R104, rectifier BR1, capacitor CY5, reverse diode BD2, adjustable resistor RV2, capacitor C1, resistor R1, bidirectional diode D17, capacitor C2, and inductor L1;

[0070] One end of fuse F1 is connected to the input driving LED WIRE1. Pin 2 of inductor LF1 is simultaneously connected to one end of adjustable resistor RV1 and the input driving LED WIRE2; pin 1 is simultaneously connected to the other end of adjustable resistor RV1 and the other end of fuse F1; pin 3 is simultaneously connected to one end of capacitor CX1, one end of resistor R102, one end of capacitor C7, and pin 1 of inductor LF2; pin 4 is simultaneously connected to the other end of capacitor CX1, one end of resistor R101, and pin 2 of inductor LF2; the other end of resistor R102 is connected to one end of resistor R101; the other end of capacitor C7 is connected to one end of resistor R31; and pin 3 of inductor LF2 is simultaneously connected to one end of capacitor CX2, one end of capacitor CY3, one end of resistor R104, and pin 3 of collector BR1. Pin 4 is connected to the other end of capacitor CX2, one end of resistor R103, one end of capacitor CY4, and pin 1 of rectifier BR1. Pin 2 of rectifier BR1 is connected to one end of adjustable resistor RV2, one end of inductor L1, one end of resistor R1, one end of capacitor C1, and pin 2 of bidirectional diode D17. Pin 4 is connected to one end of capacitor CY5, the other end of adjustable resistor RV2, the other end of capacitor C1, and one end of capacitor C2. The other end of capacitor C2 is connected to the other end of inductor L1, the other end of resistor R1, and pin 1 of bidirectional diode D17. One end of reverse diode BD2 is connected to the other end of capacitor CY5, and the other end is connected to the other end of capacitor CY4, the other end of capacitor CY3, and the input driver LED WIRE3 and grounded.

[0071] In one embodiment, such as Figure 5 As shown, the microcontroller U9 uses the CMS32L051, which centrally processes dimming control, and the PWM output dimming signal is located on pin 14.

[0072] In one embodiment, such as Figure 3As shown, the control chip U2 used in the flyback isolation circuit is model L6562, and the control chip U1 in the DC-DC constant current circuit is model OB3379, with the dimming pin being the third pin PWM1.

[0073] In one embodiment, such as Figure 3 As shown, the flyback isolation circuit consists of control chip U2, capacitor C24, resistors R39, R41, R20, R21, R22, R40, Zener diode DZ5, resistor R34, MOSFET Q5, resistors R36, R37, R38, R42, R43, Zener diode DZ6, capacitors C18, C25, R13, R45, R44, C17, R19, R46, and R47.

[0074] The DC-DC constant current circuit consists of a control chip U1, capacitor C52, bidirectional diode D18, capacitor C4, resistors R4 and R11, diodes D4 and D5, resistors R12, R15, and R17, MOSFET Q1, capacitor C48, resistors R23, R24, R25, and R48, opto-isolator U5, transformer T1, diode D1, polarized capacitor EC3, capacitor C26, resistor R49, Zener diode DZ7, and a dual-channel diode. The circuit consists of a diode, a reverse diode BD1, a polarized capacitor EC4, a resistor R6, a capacitor C10, an inductor LF3, an inductor L3, a capacitor C5, a resistor R9, a MOSFET Q7, a diode D7, resistors R92, R93, R26, R90, R91, R94, R14, capacitors C21, C22, C14, C17, resistors R3, R96, C13, R16, and R95.

[0075] Working principle: After the user selects a dimming mode, the microcontroller disables other dimming interfaces; after the dimming signal is processed by the corresponding circuit, the microcontroller outputs PWM to the control chip U1 in the DC-DC constant current circuit to dynamically adjust the LED current; the flyback isolation and DC-DC cascade architecture reduce losses and improve efficiency.

[0076] Obviously, the above embodiments are merely illustrative examples for clear explanation and are not intended to limit the implementation. Those skilled in the art will recognize that other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. However, obvious variations or modifications derived therefrom are still within the protection scope of this invention.

Claims

1. An LED dimming driver power supply device, characterized in that, include: The input rectifier circuit is used to convert alternating current (AC) to direct current (DC). A flyback isolation circuit, the input of which is connected to the input rectifier circuit; The input terminal of the DC-DC constant current circuit is connected to the output terminal of the flyback isolation circuit, and the dimming signal pin is connected to the dimming interface through the isolation circuit. The microcontroller is used to coordinate dimming mode switching and signal processing. Three dimming interfaces are included: The thyristor phase-cut dimming interface is composed of a thyristor dimmer and transmits the phase-cut angle signal to the microcontroller through a phase detection circuit. A 0-10V analog dimming interface is used, and the input signal is transmitted to the microcontroller after being regulated by the auxiliary power supply circuit. The PC programming dimming interface connects to external devices via a USB communication circuit.

2. The LED dimming driver power supply device according to claim 1, characterized in that, The output of the DC-DC constant current circuit is connected to the LED module.

3. The LED dimming driver power supply device according to claim 1, characterized in that, The phase detection circuit of the thyristor phase-cut dimming interface includes an operational amplifier U12, which is used to detect the phase-cutting start point and duration of the input voltage, and transmits the signal to the microcontroller through an optocoupler U11.

4. The LED dimming driver power supply device according to claim 1, characterized in that, The auxiliary power supply circuit of the 0-10V analog dimming interface includes a voltage regulator chip to provide a stable 3.3V reference voltage for the dimming signal.

5. The LED dimming driver power supply device according to claim 1, characterized in that, A blood-sucking circuit is provided between the flyback isolation circuit and the DC-DC constant current circuit, consisting of MOSFET Q3 and resistors R32 and R35, to improve the compatibility of the SCR dimmer.

6. The LED dimming driver power supply device according to claim 1, characterized in that, The phase detection circuit includes: amplifier U11, Zener diode DZ10, opto-isolator U12, capacitor C30, capacitor C42, capacitor C28, capacitor C27, capacitor C9, resistor R50, resistor R51, resistor R52, resistor R53, resistor R54, resistor R55, resistor R56, resistor R85, resistor R86, resistor R87, and resistor R57. One end of resistor R50 is connected to the input rectifier circuit, and the other end is connected to one end of resistor R51. One end of resistor R52 is connected to the other end of resistor R51. The negative terminal of the Zener diode DZ10 is simultaneously connected to the other end of resistor R52, one end of resistor R53, and one end of resistor R54. Pin 3 of amplifier U11 is connected to one end of resistor R51, and pin 2 is simultaneously connected to one end of resistor R85, one end of resistor R86, and one end of capacitor C42. The other end of resistor R56 is simultaneously connected to the other end of resistor R54, one end of resistor R55, and one end of capacitor C30. Pin 1 of amplifier U11... Pin 8 is connected to one end of resistor R87, and pin 8 is connected to one end of capacitor C28 and one end of capacitor C27. Pin 1 of opto-isolator U12 is connected, pin 4 is connected to 3.3V, and pin 3 is connected to resistor R57 and connected to the microcontroller. Pins 4, 5, and 6 of amplifier U11 are connected to the positive terminal of Zener diode DZ10, the other end of resistor R53, the other end of resistor R55, the other end of capacitor C30, the other end of resistor R86, the other end of capacitor C42, the other end of capacitor C28, the other end of capacitor C27, the other end of capacitor C9, and pin 2 of opto-isolator U12 and grounded.

7. The LED dimming driver power supply device according to claim 1, characterized in that, The auxiliary power supply circuit includes: diode D12, capacitor C35, resistor R67, resistor R68, resistor R70, resistor R69, capacitor C34, capacitor C36, resistor R71, Zener diode DZ8, reverse diode BD3, reverse diode BD4, and voltage regulator U15. Pin 1 of diode D12 and one end of capacitor C35 are connected to the microcontroller. Pin 2 of voltage regulator U15 is connected to pin 2 of diode D12. Pin 1 is simultaneously connected to one end of resistor R67, one end of resistor R68, one end of capacitor C34, one end of resistor R71, and the negative terminal of Zener diode DZ8. Pin 3 is simultaneously connected to the other end of resistor R67 and the other end of resistor R34. One end of resistor R69 is connected to the microcontroller, and the other end is simultaneously connected to the other end of resistor R68, one end of resistor R70, and one end of capacitor C36. The other end of resistor R71 is connected to one end of reverse diode BD3. The other end of reverse diode BD3 is connected to drive LED WIRE3. The other end of resistor R10 is also connected to the other end of capacitor C35, the other end of capacitor C36, the positive terminal of Zener diode DZ8, and one end of reverse diode BD4. The other end of reverse diode BD4 is connected to drive LED WIRE4.

8. The LED dimming driver power supply device according to claim 1, characterized in that, The USB communication circuit includes: amplifier U10, MOSFET U13, resistors R74, R75, R76, R77, R78, R79, R80, R81, R82, R83, R84, capacitors C45, C43, C44, C46, ​​diode D11, and diode D10; Amplifier U10 has pin 4 connected to one end of resistor R74 and one end of resistor R75, and connected to a microcontroller; pin 1 connected to one end of resistor R76, the other end of resistor R74, one end of capacitor C44, and one end of resistor R78; pin 3 connected to one end of resistor R79, one end of capacitor C43, the cathode of diode D11, and one end of capacitor C46; and pin 5 connected to the other end of resistor R75 and one end of capacitor C45, and connected to a 3.3V voltage. MOSFET U13 has pins 1 and 4 connected to one end of resistor R82, the other end of capacitor C46, ​​the anode of diode D11, the other end of resistor R79, and resistor R78. The other end of the capacitor is connected to the other end of capacitor C44 and capacitor C45. The other end of capacitor C43 is connected to resistor R77. Pin 6 of MOSFET U13 is connected to one end of resistor R80 and one end of resistor R81. The other end of resistor R81 is connected to the other end of resistor R82. The other end of resistor R80 is connected to the positive terminal of diode D10. The negative terminal of diode D10 receives the input voltage. Pin 5 of MOSFET U13 is connected to one end of resistor R84 and connected to the microcontroller. Pins 2 and 3 of MOSFET U13 are connected to one end of resistor R83. The other ends of resistor R84 and resistor R83 receive a 3.3V voltage.

9. The LED dimming driver power supply device according to claim 1, characterized in that, The microcontroller and the DC-DC constant current circuit are provided with a conversion isolation circuit; the conversion isolation circuit converts the PWM signal into an isolated input to the DC-DC constant current circuit; the conversion isolation circuit includes: opto-isolator U3, resistor R28, capacitor C16, resistor R10, and MOSFET Q6; Pin 1 of the opto-isolator U3 is connected to the microcontroller to input the PWM signal; pin 2 is grounded; pin 3 is connected to one end of capacitor C16 and pin 2 of MOSFET Q6 and is also grounded; pin 4 is connected to one end of resistor R28, the other end of capacitor C16, and pin 1 of MOSFET Q6. Pin 3 of MOSFET Q6 outputs the PWM1 signal to the DC-DC constant current circuit and is connected to one end of resistor R10. The other end of resistor R10 and the other end of resistor R28 input a 12V voltage.

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