A triac-based LED driver control circuit

Abstract

This invention provides a triac-controlled LED driver control circuit, relating to the field of circuit technology. The circuit includes a circuit board with a microcontroller mounted on its top surface. One end of the microcontroller is electrically connected to a resistor dimmer via a power line, another end is electrically connected to a rectifier via a power line, and yet another end is electrically connected to an optocoupler via a power line. Several sets of resistive elements are arranged on the surface of the circuit board. In use, this invention enables dimming via three input signals: triac dimming, 0 / 1~10V dimming, and resistor dimmer dimming. These three dimming input signal voltage changes are converted into an output PWM signal pulse width by the microcontroller to control the turn-on time of the low-voltage MOS transistor Q3. The dimming process does not affect the normal operation of the driver power supply system, thus avoiding issues with flickering and dimming depth.

Description

Technical Field

[0001] This utility model relates to the field of circuit technology, and in particular to a thyristor three-in-one LED driver control circuit. Background Technology

[0002] A triac-based LED driver control circuit uses a microcontroller to control the conduction time of a MOSFET to achieve dimming. A low-voltage MOSFET is connected in series at the power output terminal for control, without affecting the normal operation of the driver power supply system. It samples the input signal of the dimmer through a resistor, feeds it back to the microcontroller on the secondary side of the power supply via an optocoupler, and the microcontroller outputs a PWM signal to control the conduction time of the low-voltage MOSFET connected in series in the output circuit to achieve dimming. A 0 / 1~10V resistor dimmer also outputs a voltage signal to the microcontroller, which then outputs a PWM signal to control the conduction time of the MOSFET.

[0003] 1. Currently, the main type of SCR dimming power supply on the market is a single-voltage dimmer driver power supply. SCR dimmers are mainly divided into pre-switched SCR dimmers and post-switched MOSFET dimmers.

[0004] 2. The three-in-one dimming IC is mainly a 0 / 1~10V dimming / resistive dimming / PWM dimming dimming IC. It is also a power control IC that converts the voltage signal into a PWM signal and feeds it back to the primary power supply through an optocoupler. Utility Model Content

[0005] This invention provides a triac three-in-one LED driver control circuit to solve the problems of compatibility and dimming depth of triac dimmers from 0 / 1 to 10V.

[0006] This utility model provides a thyristor-controlled three-in-one LED driver control circuit, including a circuit board. A microcontroller is disposed on the top surface of the circuit board. One end of the microcontroller is electrically connected to a resistor dimmer via a power line. Another end of the microcontroller is electrically connected to a rectifier via a power line. A third end of the microcontroller is electrically connected to an optocoupler via a power line. Several sets of resistive elements are disposed on the surface of the circuit board.

[0007] Preferably, a cooling pipe is fixedly connected to the bottom of the circuit board, and a delivery pump is connected to one end of the cooling pipe.

[0008] Preferably, one end of the delivery pump is connected to a storage tank, and a semiconductor cooling chip is fixedly connected to the surface of the storage tank.

[0009] Preferably, a plurality of heat sinks are fixedly connected to the surface of the semiconductor cooling chip, and a support shell is sleeved on the surface of the semiconductor cooling chip, the support shell being fixedly connected to the bottom surface of the circuit board.

[0010] Preferably, a cooling fan is provided on one side of the support shell, and ventilation openings are provided on both sides of the support shell.

[0011] Preferably, a number of plug-in interfaces are fixedly connected to the surface of the circuit board, and a switch is fixedly connected to the top surface of one side of the circuit board.

[0012] Preferably, the circuit board has four sets of mounting holes on its surface, and a power supply is fixedly connected to one side of the top surface of the circuit board.

[0013] Beneficial effects:

[0014] Considering the compatibility of SCR dimmers and the dimming depth of 0 / 1 to 10V,

[0015] When using this thyristor-controlled three-in-one LED driver control circuit, the three dimming input signal voltage changes—thyristor dimming, 0 / 1~10V dimming, and resistive dimming—are all converted into an output PWM signal pulse width by the microcontroller to control the turn-on time of the low-voltage MOS in Q3 to achieve dimming. Furthermore, the dimming process does not affect the normal operation of the driver power supply system. Therefore, this new circuit application will not have issues with flickering or dimming depth. The thyristor dimming mainly uses bridge rectification to form the input voltage sampling through AR1, AR2, AR3, AR13, and AU3. The optocoupler feeds back to the secondary side to generate a 0-5V analog signal to pin 14 of the microcontroller. Pin 14 of the microcontroller receives the linearly proportional voltage signal, and pin 10 of the microcontroller generates different pulses. A wide PWM output signal controls the power supply output to achieve dimming. Resistors AR22, AR16, AR17, AR23, AQ2, AQ1, and AD2 form a load network. The purpose of this network is to maintain the minimum conduction current of the SCR dimmer when it is adjusted to the minimum angle, so that the power supply system can operate stably. When the 0 / 1~10V / resistive dimmer is dimmed, the main working principle is that the components AR14, AR15, AR52, and C19 form a voltage divider network. Pin 20 of the microcontroller generates a linear voltage signal of 0-5V. Based on the input 0-5V voltage signal, the microcontroller generates a PWM signal with a pulse width of 0%~100% at pin 10 to control the conduction time of the low-voltage MOS AQ3, thereby achieving dimming.

[0016] The above description is merely an overview of the technical solutions of the present utility model embodiments. In order to better understand the technical means of the present utility model embodiments and to implement them in accordance with the contents of the specification, and to make the above and other objects, features and advantages of the present utility model embodiments more obvious and understandable, specific embodiments of the present utility model are described below. Attached Figure Description

[0017] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the overall structure of a thyristor-controlled three-in-one LED driver control circuit according to the present invention.

[0019] Figure 2 This is a schematic diagram showing the disassembled structure of a thyristor-controlled three-in-one LED driver control circuit according to this utility model.

[0020] Figure 3 This is a schematic diagram of the cooling pipe, storage box, and semiconductor refrigeration chip structure of a silicon controlled rectifier three-in-one LED driver control circuit according to this utility model.

[0021] Figure 4 This is a schematic diagram of the circuit structure of a thyristor-controlled three-in-one LED driver control circuit according to the present invention.

[0022] Explanation of reference numerals in the attached figures:

[0023] 1. Circuit board; 2. Microcontroller; 3. Resistive dimmer; 4. Rectifier; 5. Optocoupler; 6. Resistive element; 7. Cooling pipe; 8. Transfer pump; 9. Storage box; 10. Semiconductor cooling chip; 11. Heat sink; 12. Support shell; 13. Cooling fan; 14. Socket; 15. Switch; 16. Power supply. Detailed Implementation

[0024] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0025] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains; the terminology used herein in the specification of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention; the terms “comprising” and “having”, and any variations thereof, in the specification, claims and drawings of this invention are intended to cover non-exclusive inclusion.

[0026] The term "embodiment" as used herein means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of the present invention. The appearance of the phrase "embodiment" in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0027] The directional terms appearing in the following description refer to the directions shown in the figures and are not intended to limit the specific structure of this utility model. For example, in the description of this utility model, terms such as "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the figures. They 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. Therefore, they should not be construed as limitations on this utility model.

[0028] 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, "connection" or "joining" in mechanical structures can refer to a physical connection. A physical connection can be a fixed connection, such as a connection secured by fasteners, such as screws, bolts, or other fasteners; a physical connection can also be a detachable connection, such as a snap-fit ​​or interlocking connection; a physical connection can also be an integral connection, such as a connection formed by welding, bonding, or integral molding. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0029] To enable those skilled in the art to better understand the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings.

[0030] This utility model provides, for example Figure 1-4 The circuit shown is a triac-controlled LED driver control circuit, including a circuit board 1. A microcontroller 2 is disposed on the top surface of the circuit board 1. One end of the microcontroller 2 is electrically connected to a resistor dimmer 3 via a power line. One end of the microcontroller 2 is electrically connected to a rectifier 4 via a power line. One end of the microcontroller 2 is electrically connected to an optocoupler 5 via a power line. Several sets of resistor elements 6 are disposed on the surface of the circuit board 1.

[0031] The bottom of the circuit board 1 is fixedly connected to a cooling pipe 7, and one end of the cooling pipe 7 is connected to a delivery pump 8.

[0032] Cooling pipe 7 is directly attached to the bottom of circuit board 1. It quickly absorbs heat through internal circulating coolant. Pump 8 drives the coolant to form a closed loop circulation, reducing the need for manual replacement of the coolant.

[0033] One end of the delivery pump 8 is connected to the storage box 9, and a semiconductor cooling chip 10 is fixedly connected to the surface of the storage box 9.

[0034] Storage box 9 serves as a temporary coolant container, working in conjunction with semiconductor cooling chip 10 to achieve continuous cooling; semiconductor cooling chip 10 actively cools through the Peltier effect, further cooling the coolant inside storage box 9.

[0035] Among them, a number of heat sinks 11 are fixedly connected to the surface of the semiconductor cooling chip 10, and a support shell 12 is sleeved on the surface of the semiconductor cooling chip 10. The support shell 12 is fixedly connected to the bottom surface of the circuit board 1.

[0036] The heat sink 11 increases the contact area with air, and works with the cooling fan 13 to accelerate heat dissipation; the support shell 12 forms a closed air duct to prevent hot air from flowing back.

[0037] The support shell 12 has a cooling fan 13 on one side and ventilation openings on both sides.

[0038] The cooling fan 13 facilitates the dissipation of heat, and the dual ventilation design of the support shell 12, together with the cooling fan 13, forms forced convection, improving the overall heat dissipation efficiency.

[0039] The circuit board 1 has several sets of plug-in interfaces 14 fixedly connected to its surface, and a switch 15 fixedly connected to the top surface of one side of the circuit board 1.

[0040] Interface 14 facilitates the expansion of peripherals and the connection of external devices, while switch 15 controls the on / off state of the circuit.

[0041] The circuit board 1 has four sets of mounting holes on its surface, and a power supply 16 is fixedly connected to one side of the top surface of the circuit board 1.

[0042] The mounting holes enable modular fixing, facilitating installation and positioning. Power supply 16 provides independent power to the cooling system.

[0043] Working Principle: This three-in-one LED driver control circuit utilizes three dimming input signals: thyristor dimming, 0 / 1~10V dimming, and resistor dimming. These signals are converted into an output PWM signal pulse width by the microcontroller 2, which controls the turn-on time of the low-voltage MOS in Q3 to achieve dimming. The dimming process does not affect the normal operation of the driver power supply system. Therefore, this new circuit application will not have issues with flickering or dimming depth. The thyristor dimming is mainly achieved through bridge rectification, with AR1, AR2, AR3, AR13, and AU3 forming the input voltage sample. Optocoupler 5 feeds back to the secondary side, generating a 0-5V analog signal to pin 14 of microcontroller 2. Pin 14 of microcontroller 2 receives a linearly proportional voltage signal, and pin 10 of microcontroller 2 generates... Different pulse width PWM output signals control the power supply output power to achieve dimming. Resistors AR22, AR16, AR17, AR23, AQ2, AQ1, and AD2 form a load network. The purpose of this network is to maintain the minimum conduction current of the thyristor when the dimmer is adjusted to its minimum angle, so that the power supply system can operate stably. When the 0 / 1~10V / resistor dimmer 3 dims, the main working principle is that the components AR14, AR15, AR52, and C19 form a voltage divider network. Pin 20 of the microcontroller 2 generates a linearly proportional voltage signal of 0-5V. Based on the input 0-5V voltage signal, the microcontroller 2 generates a PWM signal with a pulse width of 0% to 100% at pin 10 to control the conduction time of the low-voltage MOS AQ3, thereby achieving dimming.

[0044] The above-described embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A silicon controlled triad LED drive control circuit comprising a circuit board (1), characterized in that: A microcontroller (2) is provided on the top surface of the circuit board (1). One end of the microcontroller (2) is electrically connected to a resistor dimmer (3) via a power line. One end of the microcontroller (2) is electrically connected to a rectifier (4) via a power line. One end of the microcontroller (2) is electrically connected to an optocoupler (5) via a power line. Several sets of resistor elements (6) are provided on the surface of the circuit board (1).

2. The silicon controlled three-in-one LED drive control circuit according to claim 1, characterized in that: A cooling pipe (7) is fixedly connected to the bottom of the circuit board (1), and a delivery pump (8) is connected through one end of the cooling pipe (7).

3. The silicon controlled three-in-one LED drive control circuit according to claim 2, characterized in that: One end of the delivery pump (8) is connected to a storage tank (9), and a semiconductor cooling chip (10) is fixedly connected to the surface of the storage tank (9).

4. The silicon controlled three-in-one LED drive control circuit according to claim 3, characterized in that: The surface of the semiconductor cooling chip (10) is fixedly connected with several sets of heat sinks (11), and a support shell (12) is sleeved on the surface of the semiconductor cooling chip (10). The support shell (12) is fixedly connected to the bottom surface of the circuit board (1).

5. The silicon controlled three-in-one LED drive control circuit according to claim 4, characterized in that: A cooling fan (13) is provided on one side of the support shell (12), and ventilation openings are provided on both sides of the support shell (12).

6. The silicon controlled three-in-one LED drive control circuit according to claim 1, characterized in that: The surface of the circuit board (1) is fixedly connected with several sets of plug interfaces (14), and a switch (15) is fixedly connected to the top surface of one side of the circuit board (1).

7. The silicon controlled three-in-one LED drive control circuit according to claim 1, characterized in that: The circuit board (1) has four sets of mounting holes on its surface, and a power supply (16) is fixedly connected to one side of the top surface of the circuit board (1).

Images