A multi-mode dimming controller

Abstract

The utility model relates to the technical field of light control, specifically relates to a multi -mode light -adjusting controller, it contains power mechanism, power mechanism output direct current's VH and 3V3, set up MCU and the drive chip connected with it in the controller, drive chip controls relay ware one and relay ware two respectively, MCU still has the light coupling ware for realizing switching and synchronous step -down converter, and the synchronous step -down converter output is connected to relay ware two, and the normally open mouth of relay ware two is connected back end for connecting the positive pole of lamp VOUT, this application can automatically identify the load type of access, for example LED or incandescent lamp etc, and then can switch the drive mode, need not according to different type to select different controller, this application adopts relay ware and carries out circuit switching, avoids the mutual interference between different power components.

Description

Technical Field

[0001] This utility model relates to the field of lighting control technology, specifically to a multi-mode dimming controller. Background Technology

[0002] Lighting dimming technology allows for flexible adjustment of light source brightness according to scene requirements, achieving effects such as energy saving, enhanced atmosphere, or adaptation to different event needs. The mainstream dimming control technologies on the market are mainly divided into two categories: leading-edge dimming or trailing-edge dimming, and PWM dimming. Leading-edge or trailing-edge dimming is mainly used for resistive or inductive loads such as incandescent lamps and halogen lamps, while PWM dimming is used for capacitive loads such as LEDs.

[0003] Traditional dimmers cannot be replaced. If front and rear edge dimming is used to drive LED lights, it is very easy to cause the lights to flicker, go out, or even damage the internal driver power supply. Conversely, PWM dimmers designed for LEDs cannot drive incandescent lamps to work properly. You need to choose the appropriate dimmer according to the type of lamp. Summary of the Invention

[0004] The purpose of this invention is to address the shortcomings and deficiencies of existing technologies by providing a reasonably designed multi-mode dimming controller that can solve the aforementioned problems.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: It includes a power supply mechanism, which outputs DC VH and 3V3. The controller is equipped with an MCU and a driver chip connected to it. The driver chip controls relay one and relay two respectively. The MCU is also connected to an optocoupler for switching and a synchronous buck converter. The output port of the synchronous buck converter is connected to relay two. The normally open end of relay two is connected to the back end for connecting to the positive terminal VOUT of the lamp.

[0006] Preferably, VH is connected to a MOSFET via a resistor, which is connected to the drain (D) and gate (G) terminals of the MOSFET. The source (S) terminal is connected to the negative terminal via a resistor. Detection terminals T1 and T2 are respectively set at the two ends of the resistor. The two detection terminals are connected to operational amplifiers, which are respectively connected to the positive and negative inputs. The output of the operational amplifier is connected to the MCU.

[0007] Preferably, the COM port of the driver chip is connected to VH, the two front pins are connected to the MCU, the two control pins are respectively connected to one end of the coil of relay one and relay two, the other end of the coil is connected to VH, the common terminal of relay one is connected to the neutral line of the power supply, the normally open terminal leads out to the NO terminal, and the common terminal of relay two is connected to the SW terminal through a power inductor.

[0008] Preferably, the two control pins of the optocoupler are connected to the MCU and the negative terminal respectively. A resistor is provided on the line connecting to the MCU. On the other side, one end of the two control pins is connected to the live wire through a resistor, and the other end is connected to a thyristor and connected to the gate terminal. The left end of the thyristor is connected to the NO and the right end is connected to the neutral wire.

[0009] Preferably, the IN pin of the synchronous buck converter is connected to HW, the SW pin is connected to the SW terminal, and the EN pin is connected to the MCU.

[0010] Preferably, the power supply mechanism includes a rectifier bridge, an isolation flyback switch, and a flyback transformer. The front end of the rectifier bridge is connected to the neutral and live wires of the AC input, and the rear end is connected to the flyback transformer. The isolation flyback switch is connected to the flyback transformer. The flyback transformer outputs VH, and the rear end is connected to a linear regulator. The VIN pin of the linear regulator is connected to VH, and the VOUT pin is connected to the 3V3 terminal to output DC power.

[0011] The beneficial effects of this utility model after adopting the above structure are: 1. This application can automatically identify the type of load connected, such as LED or incandescent lamp, and then switch the drive mode without having to select different controllers for different types.

[0012] 2. This application uses relays for circuit switching to avoid mutual interference between different power components. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the present invention.

[0014] Explanation of reference numerals in the attached figures: 1. Resistor 1; 2. Resistor 2; 3. Resistor 3; 4. Resistor 4; 5. Resistor 5; 6. Capacitor 1; 7. Rectifier bridge; 8. Operational amplifier; 9. Driver chip; 10. Optocoupler; 11. Linear regulator; 12. Synchronous buck converter; 13. MCU; 14. Power inductor; 15. SCR; 16. MOSFET; 17. Relay 1; 18. Relay 2; 19. Isolation flyback switch. Detailed Implementation

[0015] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0016] See Figure 1As shown, it includes a power supply mechanism that outputs DC VH and 3V3. The controller is equipped with an MCU13 and a driver chip 9 connected to it. The MCU13 is an STM32G030C8T6, and the driver chip 9 is a ULN2003. The driver chip 9 controls relay 17 and relay 2 18 respectively. The MCU13 is also connected to an optocoupler 10 for switching and a synchronous buck converter 12. The optocoupler 10 is an MOC3021, and the synchronous buck converter 12 is an MP2314GJ-Z. The output port of the synchronous buck converter 12 is connected to relay 2 18. The normally open end of relay 2 18 is connected to the back end for connecting to the positive terminal VOUT of the lamp, thereby controlling the lamp. VH is connected to MOSFET16 (2N7002) via resistor 1. Resistor 1 is connected to its drain (D) terminal, and its gate (G) terminal is connected to MCU13. Its source (S) terminal is connected to the negative terminal via resistor 5. Detection terminals T1 and T2 are set on both ends of resistor 5. Operational amplifier 8 is connected to the two detection terminals and is connected to the positive and negative inputs respectively. The output of operational amplifier 8 is connected to MCU13. Operational amplifier 8 (LM358) is selected. One set of dual-channel operational amplifier 8 is reserved for expansion. The COM port of driver chip 9 is connected to VH, the two front pins are connected to MCU13, and the two control pins are connected to one end of the coil of relay 17 and relay 28 respectively. The other end of the coil is connected to VH. The common terminal of relay 17 is connected to the neutral line of the power supply, and the normally open terminal leads out the NO terminal. The common terminal of relay 218 is connected to the SW terminal through power inductor 14. The two control pins of the optocoupler 10 are connected to the MCU13 and the negative terminal respectively. A resistor 2 is provided on the line connecting to the MCU13. The other two control pins are connected to the live wire at one end through a resistor 3, and the other end is connected to the thyristor 15 and connected to the gate terminal. The left end of the thyristor 15 is connected to the NO and the right end is connected to the neutral wire. The IN pin of the synchronous buck converter 12 is connected to HW, the SW pin is connected to the SW terminal, and the EN pin is connected to MCU13; The power supply unit includes a rectifier bridge 7, an isolation flyback switch 19, and a flyback transformer. The front end of the rectifier bridge 7 is connected to the neutral and live wires of the AC input, and the rear end is connected to the flyback transformer. The isolation flyback switch 19 is a TNY286PG. Its BP pin is grounded through capacitor 6, and its EN pin is connected to the positive output of the rectifier bridge 7 through resistor 4. The isolation flyback switch 19 is connected to the flyback transformer. The flyback transformer outputs VH, and the rear end is connected to a linear regulator 11, which is a 3.3V AMS1117. The VIN pin of the linear regulator 11 is connected to VH, and the VOUT pin is connected to the 3V3 terminal to output DC power.

[0017] In this application, a high-voltage bus is formed by rectifier bridge 7, and then a relatively low DC current is generated by excitation switch and transformer. This DC current is generated by AMS1117 to drive chips such as MCU13 and peripheral circuits to generate low-voltage current. After power-on, all relays are disconnected, and then MCU13 controls MOSFET16 to turn on. At the same time, based on the voltage and current across resistor 5, the type of lamp is analyzed. For example, the constant current source is LED, the resistance characteristics are incandescent, and the current waveform lags behind the voltage, indicating an inductive load. This test is completed at the same time as the circuit starts. The BP pin of the isolation flyback switch 19 is connected through a capacitor, so there will be a charging delay when it is turned on. A filter capacitor can be set at its output terminal to store a certain amount of energy for MCU13 detection. Depending on the type, for example, if it is an LED, RL2 is engaged and driven by the synchronous buck converter 12, while if it is an incandescent lamp or a halogen lamp with an inductive load, RL1 is engaged and driven by the optocoupler 10.

[0018] The installation, connection, or setting methods of the components not detailed above are all common methods, and the specific structure, model, and coefficient indicators of all components are their own technologies. As long as they can achieve their beneficial effects, they can be implemented. For example, non-core functional components such as peripheral filter circuits and current-limiting resistors will not be described in detail, and are omitted in the attached drawings.

[0019] It should be understood that the above-described specific embodiments of this utility model are merely illustrative or explanatory of the principles of this utility model and do not constitute a limitation thereof. Therefore, any modifications, equivalent substitutions, improvements, etc., made without departing from the spirit and scope of this utility model should be included within the protection scope of this utility model. Furthermore, the appended claims are intended to cover all variations and modifications falling within the scope and boundaries of the appended claims, or equivalent forms of such scope and boundaries.

Claims

1. A multi-mode dimming controller, comprising a power supply mechanism, characterized in that: The power supply mechanism outputs DC VH and 3V3. The controller is equipped with MCU (13) and driver chip (9) connected to it. The driver chip (9) controls relay one (17) and relay two (18) respectively. MCU (13) is also connected to optocoupler (10) for switching and synchronous buck converter (12). The output port of synchronous buck converter (12) is connected to relay two (18). The normally open end of relay two (18) is connected to the back end for connecting the positive terminal of the lamp, VOUT.

2. The multi-mode dimming controller according to claim 1, characterized in that: The VH is connected to a MOSFET (16) via a resistor (1). The resistor (1) is connected to its drain (D) and gate (G) and MCU (13). The source (S) is connected to the negative terminal via a resistor (5). Detection terminals T1 and T2 are set at the two ends of the resistor (5). The two detection terminals are connected to an operational amplifier (8) and connected to the positive and negative inputs respectively. The output of the operational amplifier (8) is connected to the MCU (13).

3. A multi-mode dimming controller according to claim 2, characterized in that: The COM port of the driver chip (9) is connected to VH, the two front pins are connected to the MCU (13), the two control pins are connected to one end of the coil of relay one (17) and relay two (18) respectively, and the other end of the coil is connected to VH. The common terminal of relay one (17) is connected to the neutral line of the power supply, and the normally open terminal leads out the NO terminal. The common terminal of relay two (18) is connected to the SW terminal through the power inductor (14).

4. A multi-mode dimming controller according to claim 3, characterized in that: The two control pins of the optocoupler (10) are connected to the MCU (13) and the negative terminal respectively. A resistor (2) is provided on the line connected to the MCU (13). The other two control pins are connected to the live wire at one end through the resistor (3) and to the G terminal at the other end. The left end of the thyristor (15) is connected to NO and the right end is connected to the neutral wire.

5. A multi-mode dimming controller according to claim 3, characterized in that: The IN pin of the synchronous buck converter (12) is connected to HW, the SW pin is connected to the SW terminal, and the EN pin is connected to the MCU (13).

6. A multi-mode dimming controller according to claim 1, characterized in that: The power supply mechanism includes a rectifier bridge (7), an isolation flyback switch (19), and a flyback transformer. The front end of the rectifier bridge (7) is connected to the neutral and live wires of the AC input, and the rear end is connected to the flyback transformer. The isolation flyback switch (19) is connected to the flyback transformer. The flyback transformer outputs VH, and the rear end is connected to a linear regulator (11). The VIN pin of the linear regulator (11) is connected to VH, and the VOUT pin is connected to the 3V3 terminal to output DC power.

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