WO2023207372A1

WO2023207372A1 - Modular led driving circuit

Info

Publication number: WO2023207372A1
Application number: PCT/CN2023/081006
Authority: WO
Inventors: 武良举; 梁锦源; 何锦荣; 冯文钦
Original assignee: 佛山市威得士灯饰电器有限公司
Priority date: 2022-04-29
Filing date: 2023-03-13
Publication date: 2023-11-02
Also published as: CN217883899U

Abstract

Provided in the present utility model is a modular LED driving circuit. The modular LED driving circuit comprises a power supply mainboard, a wireless mainboard and a linear driving mainboard, wherein the power supply mainboard is provided with a first power supply voltage output interface and a second power supply voltage output interface, and the power supply mainboard can be connected to an external power source to obtain electric energy, and can output electric energy of different voltages at the first power supply voltage output interface and the second power supply voltage output interface; the wireless mainboard is electrically connected to the second power supply voltage output interface in a pluggable manner, so as to be powered by the power supply mainboard to wirelessly receive a control instruction and output a corresponding control instruction via at least one instruction output interface; and the linear driving mainboard is electrically connected to the first power supply voltage output interface and the instruction output interface in a pluggable manner, so as to be controlled by the wireless mainboard to control the electric energy, which is output by the power supply mainboard.

Description

LED modular driver circuit

Technical field

The utility model relates to the technical field of LED drive control, and in particular to an LED modular drive circuit.

Background technique

In the context of green development, energy conservation and emission reduction, the energy consumption of various items has become one of the important factors considered by consumers. Among them, lamps are indispensable items for modern people, and their environmental performance has attracted much attention. Compared with LED lamps, Traditional lighting fixtures have the characteristics of green, environmental protection and energy saving, which are in line with the development background of today's era. With the continuous improvement of people's living standards, quality requirements and LED lighting industry technology, the appearance, style and use functions of LED lighting fixtures have also been improved. Corresponding iterative upgrades, starting with the most basic energy-saving lighting, then transitioning to thyristor dimming lighting, and now to the emerging smart lighting with wireless control dimming and color matching functions currently on the market, LED lamps with rich styles and functions Very popular among consumers.

Unlike traditional lighting fixtures, LED lamp beads cannot be directly connected to the AC mains power grid. Instead, they must first convert the AC mains power into DC power through a drive circuit and then drive it. Therefore, LED lamps mainly include LED lamp beads and a driving part that matches the lamp beads. At present, most wirelessly controlled lighting fixtures use isolated or non-isolated switching power supply circuit technology, especially flyback switching power supplies, which mainly include rectifier circuits, power stage circuits and control circuits. These power stage circuits mainly contain switching tubes, such as triodes. First, the rectifier circuit receives AC mains power, and after passing through the rectifier circuit, it enters the power stage circuit. The power stage circuit performs voltage conversion. The control circuit is used to control the on and off of the main power switch tube in the power stage circuit, thereby achieving constant current driving of the LED. , however, the design of this type of driving power supply circuit is complex and the manufacturing cost is high, so it is difficult to reduce the price of corresponding lamp products.

Therefore, linear constant current drive circuits have also appeared on the market. Compared with switching power supply drives, linear constant current drive circuits have simpler circuits and require fewer peripheral devices than switching power supply drive circuits, making it easier to implement optoelectronics. Integrated, linear constant current drive circuits do not have the EMI problems caused by switching power supply drives due to frequent switching on and off, making linear constant current drive circuits a key research area for LED drive circuits. Therefore, some wirelessly controlled lighting fixtures on the market use this type of technology, but due to their circuit design arrangement or parameter settings (such as surge protection, overcurrent protection of the main circuit, and various The rectification, filtering, voltage stabilization and constant voltage, signal sampling feedback, etc. of the sub-circuit are unreasonable, which may easily cause the stability of the product and the smoothness of dimming and coloring to be affected to a certain extent during the actual use of this type of lighting fixtures. , affecting the user experience.

Moreover, in actual production and application of existing linear constant current drive circuits, in order to meet their corresponding use needs, corresponding circuits need to be built. For example, in order to meet the driving needs of white LED lamp beads, it is necessary to build at least A dedicated drive circuit and a dedicated power supply circuit that power the drive circuit make the existing linear constant current drive circuit cumbersome and complex, and have low flexibility, making it difficult to meet the various personalized needs on the market, such as when meeting When a wireless control module needs to be added to the driving circuit required to drive white LED lamp beads, it is difficult to adjust it directly in the original circuit, and the circuit needs to be re-arranged and built, resulting in an increase in corresponding design costs and cumbersome and complex design. The circuit is not conducive to debugging and installation of the overall circuit, resulting in corresponding increase in testing and packaging costs.

Utility model content

One purpose of this utility model is to provide an LED modular drive circuit with simple circuit design, controllable circuit design and production costs, and long service life.

An object of the present utility model is to provide an LED modular drive circuit, wherein the LED modular drive circuit is designed in a modular manner, thereby facilitating the debugging and installation of the LED modular drive circuit and simplifying the corresponding production processes. , which is beneficial to reducing the production cost of the LED modular drive circuit, and is of great significance to the popularization and application of the LED modular drive circuit.

One purpose of the present utility model is to provide an LED modular drive circuit, wherein the LED modular drive circuit is designed in a modular manner, thereby improving the flexible function combination method and improving the LED modular drive circuit's ability to meet various lighting needs. Adaptability.

One object of the present invention is to provide an LED modular drive circuit that allows receiving control instructions in a wireless manner to improve the intelligence level of corresponding lamps.

One purpose of the present utility model is to provide an LED modular drive circuit that comprehensively carries out overall structural planning, has the advantage of smaller size, and is adaptable to various lighting and installation environments.

One purpose of the present utility model is to provide an LED modular drive circuit that adopts dual-channel or multi-channel PWM pulse width modulation drive circuit technology, so that the LED modular drive circuit has low ripple, no flicker, and high The characteristics of conversion efficiency and high power factor ensure the user's experience during actual use.

An object of the present invention is to provide an LED modular drive circuit, wherein the LED modular drive circuit wirelessly receives control instructions to adjust the brightness and color temperature of its light-emitting load, as well as to realize scheduled lights off and various lights. Functional applications such as scene mode settings improve the intelligence level of the product.

One purpose of the present utility model is to provide an LED modular drive circuit that can ensure that the corresponding change effect of the light-emitting load during the wireless operation process is smooth, and there will be no undesirable phenomena such as light flickering, respiratory flickering, or failure to start. Give users a good experience.

One purpose of the present utility model is to provide an LED modular drive circuit that is suitable for the driving requirements of multi-chromaticity dimming, so that the LED modular drive circuit can adjust cold white temperature lamp beads and warm white temperature lamp beads. Light needs are practical.

One purpose of the present utility model is to provide an LED modular drive circuit, which can also meet the dimming requirements of RGB three-color light beads, so as to improve the practicality of the LED modular drive circuit and make the LED module The drive circuit can be applied to a variety of usage environments.

One purpose of this utility model is to provide an LED modular drive circuit that can realize RGB dynamic color setting by wirelessly receiving control instructions, improve the intelligence level of the product, and further expand the application of the LED modular drive circuit. environment.

An object of the present invention is to provide an LED modular drive circuit that simplifies the corresponding power supply circuit and efficiently utilizes electric energy, thereby reducing the overall standby power consumption.

An object of the present invention is to provide an LED modular drive circuit, wherein the LED modular drive circuit includes a power supply mainboard, wherein the power supply mainboard can be connected to an external power source to obtain electric energy and has at least two power supply voltage outputs. Interface, the power supply motherboard can output electric energy of different voltages at each of the power supply voltage output interfaces, so that the corresponding functional module can be powered when connected to its working voltage adaptation interface, thereby improving the flexibility of circuit design.

One object of the present utility model is to provide an LED modular drive circuit, wherein the power supply mainboard has a first power supply voltage output interface and a second power supply voltage output interface, and the power supply mainboard is connected to the first power supply voltage output interface. and the second output interface respectively output two channels of electric energy with different voltages, so that the corresponding functional module obtains electric energy by being connected to an adapted interface, thereby improving the flexibility of the circuit design.

An object of the present invention is to provide an LED modular drive circuit, wherein the LED modular drive circuit includes a linear drive motherboard and a wireless motherboard, wherein the linear drive motherboard is electrically connected to the first supply voltage. The output interface is to obtain the electric energy processed by the power supply mainboard. The wireless mainboard is electrically connected to the second power supply voltage output interface to be powered by the power supply mainboard without The power supply mainboard includes at least one command output interface, and the linear drive mainboard is electrically connected to the command output interface, and is controlled by the wireless mainboard according to the control command received wirelessly. The electric energy output by the power supply motherboard is controlled to drive at least one light-emitting load connected to its output end, thereby realizing the practical application effect of wirelessly controlling lamps and improving the intelligence level of the product.

An object of the present invention is to provide an LED modular drive circuit, wherein the linear drive motherboard is pluggably and electrically connected to the first power supply voltage output interface of the power supply motherboard and all of the wireless motherboard. The command output interface, the wireless motherboard is pluggably and electrically connected to the second power supply voltage output interface of the power supply motherboard, so that the power supply motherboard, the linear drive motherboard and the wireless motherboard Flexibility in combination and replacement.

One object of the present utility model is to provide an LED modular drive circuit, wherein the power supply motherboard integrates an adjustment circuit, a high-voltage power supply circuit and a low-voltage power supply circuit, wherein the input end of the adjustment circuit is connected to an external power supply. The input end of the high-voltage power supply circuit is connected to the output end of the adjustment circuit to obtain power through the adjustment circuit and output DC power at the first power supply interface, wherein the low-voltage power supply circuit can be connected to the first power supply interface. The second power supply interface outputs DC power that is different from the output voltage of the high-voltage power supply circuit.

One object of the present invention is to provide an LED modular drive circuit, wherein the linear drive motherboard integrates a white light control circuit and is electrically connected to the first power supply interface and the command output interface through the white light control circuit. , wherein the white light control circuit is controlled by the wireless motherboard to control the DC power output by the power supply motherboard at the first power supply interface, thereby driving the luminous load connected to its output end in a linear and constant current manner, So that the light-emitting load is powered.

One object of the present invention is to provide an LED modular drive circuit, wherein the light-emitting load is an LED lamp group composed of a plurality of LED lamp beads. The LED lamp group includes at least one cool white warm lamp bead and at least one warm white lamp bead. Warm lamp beads, the cold white warm lamp beads and the warm white warm lamp beads are respectively connected to the output end of the white light control circuit to be driven by the white light control circuit.

One object of the present invention is to provide an LED modular drive circuit, wherein the linear drive motherboard is further integrated with a colored light control circuit, and the LED lamp set further includes at least one RGB lamp bead, wherein the colored light control circuit is The RGB lamp bead is driven with a linear constant current so that the RGB lamp bead is powered, so that the LED modular drive circuit can adapt to application scenarios requiring color lighting and improve the LED modular drive circuit. of practicality.

One object of the present invention is to provide an LED modular drive circuit, wherein the linear drive motherboard is further electrically connected to the second power supply interface and the command output interface through the colored light control circuit. The light control circuit drives the RGB lamp beads under the control of the wireless motherboard in a powered state.

One purpose of the present utility model is to provide an LED modular drive circuit, in which the wireless motherboard and the colored light control circuit are powered by the same power supply interface, which is conducive to simplifying the circuit of the LED modular drive circuit and improving the LED modular drive circuit’s utilization efficiency of electrical energy.

One object of the present invention is to provide an LED modular drive circuit, wherein the LED modular drive circuit adopts a method of reducing the voltage of the DC power output by the power supply motherboard through the second power supply interface to a working voltage. , providing a suitable working voltage for the wireless motherboard, thereby eliminating the need to set up a dedicated power supply circuit for the wireless motherboard, improving the effective utilization of the overall circuit, and simplifying the circuit accordingly.

According to one aspect of the present invention, the present invention provides an LED modular drive circuit, wherein the LED modular drive circuit includes:

A power supply mainboard, wherein the power supply mainboard has a first power supply voltage output interface and a second power supply voltage output interface. The power supply mainboard can be connected to an external power source to obtain electric energy and output it to the first power supply voltage output interface. and the second supply voltage output interface outputs electric energy of different voltages;

A wireless motherboard, wherein the wireless motherboard is pluggably and electrically connected to the second power supply voltage output interface to be powered by the power supply motherboard to receive control commands wirelessly, and output corresponding control commands through at least one command output interface. Control instruction;

A linear drive motherboard, wherein the linear drive motherboard is pluggably and electrically connected to the first supply voltage output interface and the command output interface, so that when the linear drive motherboard is electrically connected to the third The status of a power supply voltage output interface and the command output interface are controlled by the wireless motherboard to control the electric energy output by the power supply motherboard, thereby driving at least one light-emitting load connected to its output end.

In one embodiment of the present invention, the power supply mainboard integrates an adjustment circuit, a high-voltage power supply circuit and a low-voltage power supply circuit, wherein the input end of the adjustment circuit is connected to an external power supply, and the high-voltage power supply circuit The input end is connected to the output end of the adjustment circuit to obtain electric energy through the adjustment circuit and output DC electric energy at the first power supply interface, wherein the low-voltage power supply circuit outputs the same voltage as the second power supply interface. The output voltage of the high-voltage power supply circuit is DC power with different voltages.

In an embodiment of the present invention, the wireless motherboard includes a voltage conversion module and a connector A receiving and processing module, the voltage conversion module is electrically connected to the second supply voltage output interface to receive the electric energy output by the second supply voltage output interface, and adjust the electric energy to a working voltage, so that the receiving The processing module is powered to receive control instructions.

In an embodiment of the present invention, the power voltage output by the first power supply voltage output interface is greater than the power voltage output by the second power supply voltage output interface.

In an embodiment of the present invention, the power voltage output by the second power supply voltage output interface is 5-12V.

In an embodiment of the present invention, the working voltage of the receiving and processing module of the wireless motherboard is 3.3V±0.3V.

In an embodiment of the present invention, the linear drive motherboard integrates a white light control circuit and is electrically connected to the first power supply interface and the command output interface through the white light control circuit, wherein the white light The control circuit is controlled by the wireless motherboard to control the DC power output by the power supply motherboard at the first power supply interface, thereby linearly driving the light-emitting load connected to its output end with a constant current to cause the light-emitting load to emit light. The load is powered.

In one embodiment of the present invention, the light-emitting load is an LED lamp group composed of multiple LED lamp beads. The LED lamp group includes at least one cool white warm lamp bead and at least one warm white warm lamp bead. The cool white temperature lamp beads and the warm white temperature lamp beads are respectively connected to the output ends of the white light control circuit to be driven by the white light control circuit.

In an embodiment of the present invention, the linear drive motherboard is further integrated with a colored light control circuit and the colored light control circuit is further electrically connected to the second power supply interface and the command output interface, The LED lamp set also includes at least one RGB lamp bead. When the colored light control circuit is powered, it is controlled by the wireless motherboard to drive the RGB lamp bead connected to its output end.

In an embodiment of the present invention, the power voltage output by the first power supply voltage output interface is 100-360V.

By understanding the following description and drawings, further objectives and advantages of the present invention will be fully reflected.

Description of drawings

FIG. 1 is a schematic block diagram of a circuit structure of an LED modular driving circuit according to an embodiment of the present invention.

FIG. 2 is a partial equivalent circuit diagram of the LED modular driving circuit according to the above embodiment of the present invention.

FIG. 3 is a partial equivalent circuit schematic diagram of the LED modular driving circuit according to the above embodiment of the present invention.

FIG. 4 is a partial equivalent circuit schematic diagram of the LED modular driving circuit according to the above embodiment of the present invention.

FIG. 5 is a schematic block diagram of the circuit structure of the LED modular drive circuit according to a modified embodiment of the above-mentioned embodiment of the present invention.

FIG. 6 is a partial equivalent circuit schematic diagram of the LED modular drive circuit according to the above modified embodiment of the present invention.

Detailed ways

The following description is used to disclose the invention so that those skilled in the art can implement the invention. The preferred embodiments in the following description are only examples, and other obvious modifications may occur to those skilled in the art. The basic principles of the invention defined in the following description may be applied to other embodiments, variations, improvements, equivalents and other technical solutions without departing from the spirit and scope of the invention.

Those skilled in the art should understand that in the disclosure of the present utility model, the terms "vertical", "horizontal", "upper", "lower", "front", "back", "left", "right" The orientations or positional relationships indicated by "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. are based on the orientations or positional relationships shown in the drawings and are only for convenience of description. The present invention and simplified description do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore the above terms should not be construed as limitations of the present invention.

It should be understood that the term "a" should be understood as "at least one" or "one or more", that is, in one embodiment, the number of an element may be one, while in other embodiments, the number of the element may be The number may be multiple, and the term "one" shall not be understood as a limitation on the number.

In the description of the present utility model, it should be noted that, unless otherwise clearly stated and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense. For example, it can be a fixed connection or a removable connection. Detachable connection, or integral connection; it can be a mechanical connection, an electrical connection or mutual communication; it can be a direct connection, or an indirect connection through an intermediate medium, it can be an internal connection between two elements or a mutual communication between two elements functional relationship. For those of ordinary skill in the art, it can be determined according to specific circumstances. Understand the specific meanings of the above terms in this utility model.

The utility model provides an LED modular drive circuit, which obtains electric energy from an external power source at the opposite front end and then transfers it to the light-emitting load 40 at the opposite rear end. In the present utility model, for convenience of description, the LED modular drive circuit is placed close to One end of the external power supply serves as the input end, and the end close to the light-emitting load 40 serves as the output end. The LED modular drive circuit is modularly designed, which is beneficial to the debugging and installation of the LED modular drive circuit. Simplifying the corresponding production process is beneficial to reducing the production cost of the LED modular drive circuit, and is of great significance to the popularization and application of the LED modular drive circuit.

Specifically, with reference to Figure 1 of the accompanying drawings of the present utility model, the LED modular driving circuit includes a power supply mainboard 10, a linear drive mainboard 20 and a wireless mainboard 30, wherein the power supply mainboard 10 can be An external power supply is connected to output electric energy at its power supply voltage output interface. The linear drive mainboard 20 is electrically connected to the power supply voltage output interface of the power supply mainboard 10 to obtain the power supply voltage output interface of the power supply mainboard 10 . The DC power output is controlled by the wireless motherboard 30 to control the DC power output by the power supply motherboard 10. Specifically, the wireless motherboard 30 is electrically connected to the power supply voltage output of the power supply motherboard 10. interface to obtain power through the power supply voltage output interface of the power supply motherboard 10 to wirelessly receive control instructions, and output corresponding control instructions through at least one of the command output interfaces 301. The linear drive motherboard 20 is electrically connected to all The command output interface 301 of the wireless motherboard 30 is controlled by the wireless motherboard 30 according to the control command received by the wireless motherboard 30 to control the electric energy output by the power supply motherboard 10, so that the driver is connected to it. At least one light-emitting load 40 at the output end can realize the practical application effect of wirelessly controlling the lamp and improve the intelligence level of the product.

It is worth mentioning that the LED modular drive circuit is designed in a modular manner, thereby improving flexible function combinations and improving the adaptability of the LED modular drive circuit to a variety of lighting needs. Specifically, the power supply The motherboard 10 has at least two power supply voltage output interfaces, and can respectively output electric energy of different voltages at each of the power supply voltage output interfaces, so that when the corresponding functional module is connected to its working voltage adaptation interface, it can be powered, thereby improving all aspects of the power supply. Describes the flexibility in the design of LED modular drive circuits.

Specifically, in this embodiment of the present invention, the power supply mainboard 10 has a first power supply voltage output interface 101 and a second power supply voltage output interface 102. The power supply mainboard 10 is connected to the first power supply voltage output interface. The interface 101 and the second output interface 102 respectively output two channels of electrical energy with different voltages. This allows the corresponding functional modules to obtain electric energy by being connected to the appropriate interface, thereby improving the flexibility of the circuit design.

Further, the power supply mainboard 10 integrates an adjustment circuit 11, a high-voltage power supply circuit 12 and a low-voltage power supply circuit 13, wherein the input end of the adjustment circuit 11 is connected to the AC mains to output electric energy after rectification. The voltage of the AC mains connected to the adjustment circuit 11 is 85V to 277V, and it can be understood that the voltage of the AC mains will vary depending on the power grid environment. The utility model does not limit this. The input end of the high-voltage power supply circuit 12 is connected to the output end of the adjustment circuit 11 to obtain electric energy through the adjustment circuit 11 and output DC electric energy to the first supply voltage output interface 101, wherein the low-voltage power supply circuit 13 The second power supply voltage output interface 102 can output DC power energy that is different from the output voltage of the high-voltage power supply circuit 11 .

Specifically, in this embodiment of the present invention, the electric energy voltage output by the high-voltage power supply circuit 12 at the first power supply voltage output interface 101 is 100-360V, and the low-voltage power supply circuit 13 outputs power at the second power supply voltage output interface 101. The power voltage output by the voltage output interface 102 is 5-12V, and it can be understood that in some embodiments of the present utility model, the first power supply voltage output interface 101 and the second power supply voltage output interface 101 of the power supply mainboard 10 The power voltage output by the power supply voltage output interface 102 is allowed to have different values. For example, the power voltage output by the second power supply voltage output interface 102 is adjusted to 3.3V±0.3V, which is not limited by the present invention.

Referring specifically to Figure 2 of the accompanying drawings of the present utility model, the adjustment circuit 11 includes a fuse resistor FD, a varistor M1, a first common mode inductor L5, a second common mode inductor L4, a Adjusting circuit capacitance The first primary end of the first common mode inductor L5, the live line of the AC mains power is connected to the second primary end of the first common mode inductor L5 through the fuse resistor FD, and both ends of the varistor M1 are respectively connected to the first primary end and the second primary end of the first common mode inductor L5, and the first primary end and the second primary end of the second common mode inductor L4 are respectively connected to the first common mode The first secondary end and the second secondary end of the inductor L5, one end of the adjustment circuit capacitor X1 is connected to the first secondary end of the first common mode inductor L5 and the second common mode inductor L4 Between the first primary end, the other end of the adjustment circuit capacitor X1 is connected between the second secondary end of the first common mode inductor L5 and the second primary end of the second common mode inductor L4. time, the first secondary terminal and the second secondary terminal of the second common mode inductor L4 are respectively connected to the two AC input terminals of the first rectifier bridge stack BR2, and the DC input terminals of the first rectifier bridge stack BR2 The output negative terminal is grounded, and the DC output positive terminal of the first rectifier bridge stack BR2 is connected to the adjusting One end of the circuit resistor R1 and the other end of the adjustment circuit resistor R1 are connected to one end of the second film capacitor CBB2, and this end of the second film capacitor CBB2 is connected to the power supply. The second film capacitor CBB2 The other end of the first film capacitor CBB1 is connected to ground. One end of the first film capacitor CBB1 is connected between the DC output positive terminal of the first rectifier bridge stack BR2 and the adjustment circuit resistor R1. The other end of the first film capacitor CBB1 One end is grounded, and the first filter inductor L3 is connected in parallel to the first adjustment circuit resistor R1.

Further, the high-voltage power supply circuit 12 includes a boost-type constant voltage driver chip U2, and the specific pins of the boost-type constant voltage driver chip U2 of the high-voltage power supply circuit 12 are as shown in the following table:

The high-voltage power supply circuit 12 further includes a first high-voltage resistor R20, a second high-voltage resistor R17, a third high-voltage resistor R13, a fourth high-voltage resistor R13, a fifth high-voltage resistor R14, and a third resistor R13. A high voltage supply for the sixth resistor R15, a high voltage supply for the seventh resistor R18, a high voltage supply for the eighth resistor R19, a high voltage supply for the ninth resistor R2, a high voltage supply for the tenth resistor R16, a high voltage supply for the first diode D5, and a high voltage supply for the ninth resistor R16. A high power supply second diode D6, a high power supply third diode D1, a high power supply first capacitor C1, a high power supply second capacitor C6, a high power supply third capacitor C7, and a high power supply first electrolytic capacitor E4, a high-power second electrolytic capacitor E1 and a high-power common mode inductor L2, wherein one end of the high-power first resistor R20 is connected to the electric energy output by the adjustment circuit 11, and the high-power second resistor R20 is The other end is connected to one end of the second high-power resistor R17, and the other end of the second high-power resistor R17 is connected to the anode of the first high-power diode D5. The cathode of the electrode tube is connected to one end of the first high power supply capacitor C1 and the anode of the first high power supply electrolytic capacitor E4. The other end of the first high power supply capacitor C1 is grounded. The first high power supply capacitor C1 is connected to the anode of the first high power supply electrolytic capacitor E4. The cathode of the electrolytic capacitor E4 is grounded, the anode of the first high-power electrolytic capacitor E4 is connected to the third pin of the boost-type constant voltage driver chip U2, and one end of the fourth high-power resistor R13 is connected to The boost type constant voltage driver chip U2 The first pin, the other end of the fourth high-power resistor R13 is grounded, the second high-power capacitor C6 is connected in parallel with the fourth high-power resistor R13, and one end of the sixth high-power resistor R15 is connected At the fourth pin of the boost-type constant voltage driver chip U2, the other end of the sixth high-supply resistor R15 is grounded, and the fifth high-supply resistor R14 is connected in parallel with the sixth high-supply resistor R15. One end of the seventh high-power resistor R18 is connected to the first pin of the boost-type constant voltage driver chip U2, and the other end is connected to one end of the eighth resistor R19. The third high-power diode The anode of D1 is connected to the output pin of the boost-type constant voltage driver chip U2, and the cathode of the third high-supply diode D1 is connected to the first supply voltage output interface 101. The third high-supply diode D1 The anode of the two electrolytic capacitors E1 is connected to the cathode of the third high-power diode D1, and the other end of the eighth resistor R19 is connected to the third high-power diode D1 and the second high-power diode. Between the electrolytic capacitor E1, the ninth high-power resistor R2 is connected in parallel with the second high-power electrolytic capacitor E1, and the anode of the second high-power diode D6 is connected to the boost-type constant voltage driver chip. The output pin of U2, the cathode of the second high power supply diode D6 is connected to the power supply, the third high power supply capacitor C7 and the high power supply common mode inductor L2 are connected in parallel to the second high power supply diode D6 , wherein both ends of the tenth high-voltage power supply resistor R16 are grounded to filter out interference signals in the high-voltage power supply circuit 12 .

Further, the low-voltage power supply circuit 13 includes a constant current control chip U1, and the specific pins of the constant current control chip U1 are as shown in the following table:

The low-voltage power supply circuit 13 further includes a first low-supply resistor R4, a second low-supply resistor R5, a third low-supply resistor R8, a fourth low-supply resistor R9, a fifth low-supply resistor R11, and a low-voltage power supply circuit 13. A sixth low-supply resistor R12, a low-supply seventh resistor R10, a low-supply eighth resistor R6, a low-supply ninth resistor R7, a low-supply tenth resistor R3, a low-supply first diode D7, and a low-supply first diode D7. The second low supply diode D2, the third low supply diode D4, the fourth low supply diode D3, the first low supply capacitor C3, the second low supply capacitor C4, and the A third low supply capacitor C5, a first low supply electrolytic capacitor E3, a second low supply electrolytic capacitor E2, and a three-winding transformer T1, wherein the anode of the first low supply diode D7 is connected to the power supply, and the The cathode of the first low supply diode D7 is connected to one end of the first low supply resistor R4, and the other end of the first low supply resistor R4 is connected to one end of the second low supply resistor R5, so The other end of the second low supply resistor R5 is connected to the third pin of the constant current control chip U1, and the anode of the first low supply electrolytic capacitor E3 is connected to the first low supply diode D7 and Between the low power supply first resistor R4, the cathode of the low power supply first electrolytic capacitor E3 is grounded, and one end of the low power supply first capacitor C3 is connected to the low power supply second resistor R5 and the constant power supply. Between the current control chip U1, the other end is grounded, one end of the low-supply fifth resistor R11 is connected to the third pin of the constant-current control chip U1, and the other end is connected to the low-supply third pin. The cathode of diode D4, the anode of the third low-power diode D4 is connected to one end of the second primary winding of the three-winding transformer T1, and the other end of the second primary winding of the three-winding transformer T1 is grounded, one end of the low-voltage sixth resistor R12 is connected between the low-voltage third diode D4 and the three-winding transformer T1, and the other end is connected to the first of the constant current control chip U1 pin, one end of the low-voltage seventh resistor R10 is connected between the low-voltage sixth resistor R12 and the constant current control chip U1, the other end is grounded, and the output pin of the constant current control chip U1 is connected to One end of the first primary winding of the three-winding transformer T1, one end of the second low supply capacitor C4 is connected to the output pin of the constant current control chip U1, and the other end of the second low supply capacitor C4 is connected to the anode of the second low-voltage diode D2, the eighth low-voltage resistor R6 is connected in parallel to the second low-voltage capacitor C4, and the cathode of the second low-voltage diode D2 is connected to The other end of the first primary winding of the three-winding transformer T1 is connected to the first low-power diode D7 and the third low-power diode. Between a resistor R4, one end of the secondary winding of the three-winding transformer T1 is grounded, and the other end of the secondary winding of the three-winding transformer T1 is connected to one end of the low-power third capacitor C5 and the The anode of the fourth low-supply diode D3 is connected to the other end of the third low-supply capacitor C5 and connected to one end of the ninth low-supply resistor R7. The other end of the ninth resistor R7 is connected to the low-supply The cathode of the fourth diode D3, the cathode of the low-power fourth diode D3 is connected to the second supply voltage output interface 102, and the anode of the low-power second electrolytic capacitor E2 is connected to the Between the fourth low-supply diode D3 and the second supply voltage output interface 102, the cathode of the second low-supply electrolytic capacitor E2 is grounded, and the tenth low-supply resistor R3 is connected in parallel with the third low-supply resistor. Two electrolytic capacitors E2.

Further, in this embodiment of the present invention, the linear drive motherboard 20 is electrically connected to the first power supply voltage output interface 101 to obtain the voltage processed by the power supply motherboard 10 Electric energy, the wireless motherboard 30 is electrically connected to the second power supply voltage output interface 102 to be powered by the low-voltage power supply circuit 13 to wirelessly receive control instructions, and to control the linear motion according to the wirelessly received control instructions. The driving main board 20 controls the electric energy output by the power supply main board 10 .

Preferably, in this embodiment of the present invention, the linear drive motherboard 20 is pluggably and electrically connected to the first supply voltage output interface 101 and the command output interface 301, and the wireless The mainboard 30 is pluggably and electrically connected to the second supply voltage output interface 102. Specifically, in the equivalent circuit diagram shown in FIG. 2, the first supply voltage output interface 101 and the second supply voltage The output interface 102 is designed in the form of a printed board socket. The linear drive motherboard 20 and the wireless motherboard 30 are electrically connected to the first power supply voltage output interface 101 and the second power supply voltage through corresponding cables. The output interface 102 can simply and easily realize the connection between the power supply motherboard 10, the linear drive motherboard 20 and the wireless motherboard 30, which is conducive to ensuring the mass production of the LED modular drive circuit and enabling The relative positions between the power supply mainboard 10 , the linear drive mainboard 20 and the wireless mainboard 30 are flexible. The power supply motherboard 10 , the linear drive motherboard 20 and the wireless motherboard 30 can also be connected in a pin connection manner, thereby improving the production efficiency of the LED modular drive circuit in a plug connection manner. and facilitate maintenance and repair of the LED modular drive circuit.

In particular, in some embodiments of the present invention, the power supply mainboard 10, the linear drive mainboard 20 and the wireless mainboard 30 can also be connected by welding to each other, such as the first power supply voltage output interface 101 and the second power supply voltage output interface 102 are implemented as corresponding connection pads, and the linear drive motherboard 20 and the wireless motherboard 30 are electrically connected to the first power supply by soldering wires to the pads. The voltage output interface 101 and the second power supply voltage output interface 102. In other embodiments, the power supply mainboard 10, the linear drive mainboard 20 and the wireless mainboard 30 can also be integrated and welded into an integral circuit. The form of plate parts is connected.

In particular, the linear drive motherboard 20 integrates a white light control circuit 21 and is electrically connected to the first power supply interface 101 and the command output interface 301 through the white light control circuit 21, wherein the white light control circuit 21 is controlled by the wireless motherboard 30 to control the DC power output by the power supply motherboard 10 at the first power supply interface 101, thereby linearly driving the luminous load 40 connected to its output end with a constant current, so that The lighting load 40 is powered.

Preferably, in this embodiment of the present invention, the luminous load 40 is implemented as an LED lamp group composed of multiple LED lamp beads, and preferably, the LED lamp group includes at least one cool white warm lamp. beads 41 and at least one warm white warm lamp bead 42, wherein the cool white warm lamp bead 41 and the warm white The warm lamp beads 42 are respectively connected to the output ends of the linear drive motherboard 20 to be driven by the linear drive motherboard 20 , wherein the color temperature of the cool white warm lamp beads 41 is 4500k to 8000k, and the warm white warm lamp The color temperature of the bead 42 is 1800k to 4000k, wherein the output end of the white light control circuit 21 is connected to the input end of the luminous load 40 composed of the cool white temperature lamp bead 41 and the warm white temperature lamp bead 42 , to drive the cool white warm lamp bead 41 and the warm white warm lamp bead 42, so that the LED modular drive circuit is suitable for the driving requirements of multi-chromaticity dimming. For the cold white warm lamp bead 41 It is practical to meet the dimming requirements of the warm white temperature lamp beads 42 .

In detail, with specific reference to Figure 3 of the accompanying drawings, the white light control circuit 21 includes a first white light resistor R57, a second white light resistor R51, a third white light resistor R48, a fourth white light resistor R56, and at least one White light constant current control chip U7 (U8, U9, U10) and at least one white light fifth resistor R33 (R35, R41, R43) corresponding to the number of the white light constant current control chip U7 (U8, U9, U10) and At least one white light sixth resistor R53 (R50, R36, R42), wherein the white light constant current control chip U7 (U8, U9, U10) has eight pins, and the specific pins are as shown in the following table:

Specifically, the first pin of the white light constant current control chip U7 (U8, U9, U10) is connected to one end of the white light first resistor R57, and the other end of the white light first resistor R57 is connected to the white light first resistor R57. The command output interface 301, one end of the third white light resistor R48 is connected between the first white light resistor R57 and the command output interface 301, the other end of the third white light resistor R48 is grounded, wherein the The second pin of the white light constant current control chip U7 (U8, U9, U10) is connected to one end of the white light fifth resistor R33 (R35, R41, R43), so as to pass through the white light fifth resistor R33 (R35, R35, R43). R41, R43) are connected to ground, where the third pin of the white light constant current control chip U7 (U8, U9, U10) is Connected to one end of the second white light resistor R51, the other end of the second white light resistor R51 is connected to the command output interface 301, and one end of the fourth white light resistor R56 is connected to the second white light resistor Between R51 and the command output interface 301, the other end of the fourth white light resistor R56 is grounded, and the fourth pin of the white light constant current control chip U7 (U8, U9, U10) is connected to the white light One end of the sixth resistor R53 (R50, R36, R42) and the other end of the sixth white light resistor R53 (R50, R36, R42) are grounded, wherein the white light constant current control chip U7 (U8, U9, U10) The fifth pin of is connected to the cold white temperature lamp bead 41, and the sixth pin of the white light constant current control chip U7 (U8, U9, U10) is connected to the warm white temperature lamp bead 42. The eighth pin of the constant current control chip U7 (U8, U9, U10) is connected to the first power supply voltage output interface 101, and the cool white temperature lamp bead 41 and the warm white temperature lamp bead 42 are connected to between the eighth pin of the white light constant current control chip U7 (U8, U9, U10) and the first supply voltage output interface 101, so that the white light control circuit 21 can be controlled by the wireless motherboard 30 Driving the cool white temperature lamp beads 41 and the warm white temperature lamp beads 42 makes the LED modular drive circuit suitable for the driving requirements of multi-chromaticity dimming and improves the practicality of the LED modular drive circuit .

It is worth mentioning that the white light constant current control chip U7 (U8, U9, U10) is a dual-channel PWM dimmable LED high-voltage linear constant current drive chip, so that the LED modular drive circuit has low ripple The characteristics of wave, no stroboscopic, high conversion efficiency, and high power factor can ensure the user's experience during actual use, so that when the user wirelessly operates the LED modular drive circuit, the The cold white temperature lamp beads 41 and the warm white temperature lamp beads 42 change smoothly according to the user's operation instructions, and there will be no undesirable phenomena such as light flickering, respiratory flickering or failure to start, giving the user a good usage experience. In addition, it is worth mentioning that in some embodiments of the present invention, the white light constant current control chip U7 (U8, U9, U10) can also be implemented as a multi-channel PWM dimmable light. LED high voltage linear constant current driver chip.

Further, with reference to Figure 4 of the accompanying drawings of the present utility model, the wireless motherboard 30 includes a voltage conversion module 31 and a reception processing module 32 (corresponding to MD1 in the figure). The voltage conversion module 31 is electrically Connected to the second supply voltage output interface 102 to receive the electric energy output by the second supply voltage output interface 102 and adjust the electric energy to a working voltage so that the receiving and processing module 32 is powered and receives control instructions, Specifically, in this embodiment of the present invention, the working voltage of the receiving and processing module 32 is 3.3V±0.3V, so the voltage conversion module steps down the voltage output by the second supply voltage output interface 102 to 3.3V±0.3V for the reception and processing module 32 to work.

Specifically, the receiving and processing module 32 has twelve pins, and the specific pins of the receiving and processing module 32 are as shown in the following table:

The first pin of the reception processing module 32 is connected to the voltage conversion module to obtain power supply, and the wireless motherboard 30 includes the first pin provided on the reception processing module 32 and the voltage conversion module. There is a filter capacitor C14 between them. One end of the filter capacitor C14 is connected between the first pin of the receiving processing module 32 and the voltage conversion module. The other end of the filter capacitor C14 is grounded to The power supply of the receiving and processing module 32 is filtered to ensure the working stability of the receiving and processing module 32 . The second pin, the third pin, the fourth pin, the seventh pin and the eighth pin of the receiving and processing module 32 are respectively connected to the command output interface 301 to output corresponding control to the command output interface 301. instruction.

It is worth mentioning that in this embodiment of the present invention, the wireless motherboard 30 can be implemented as an infrared receiving unit, and in some embodiments of the present invention, the wireless motherboard 30 can also be implemented as an infrared receiving unit. Implemented as a wireless motherboard such as a radio frequency receiver, WiFi module, Zigbee module, and Bluetooth module, or implemented as a combined receiving unit of various wireless receivers. For example, the wireless motherboard 30 can receive infrared signals and receive radio frequency signals, etc., to enrich The wireless receiving function of the LED modular drive circuit enables the LED modular drive circuit to be suitable for various application scenarios and meet different usage requirements.

In particular, the instructions received by the wireless motherboard 30 include but are not limited to the instructions for the light-emitting load 40 The brightness and color temperature adjustment, as well as instructions such as timing lights off and setting various lighting scene modes, enable the user to wirelessly adjust the brightness and color temperature of the light-emitting load 40 through the LED modular drive circuit. It can also realize functional applications such as scheduled lights off and various lighting scene mode settings, thus improving the intelligence level of the product.

It is worth mentioning that the LED modular drive circuit can also meet the dimming requirements of RGB three-color light beads, thereby improving the practicality of the LED modular drive circuit and making the LED modular drive The circuit can be adapted to a variety of usage environments. For details, refer to Figure 5 of the accompanying drawings of the description of the present utility model. The circuit structure block diagram of the LED modular drive circuit according to a modified embodiment of the above-mentioned embodiment of the present utility model is schematically illustrated. The linear drive motherboard 20 of the LED modular drive circuit is further integrated with a colored light drive circuit 22, and the LED lamp group further includes at least one RGB lamp bead 43, wherein the RGB lamp bead 43 is connected to the The output end of the colored light control circuit 22 can be driven by the colored light control circuit 22, so that the LED modular drive circuit can adapt to application scenarios with color lighting requirements and improve the practicality of the LED modular drive circuit. sex.

In particular, the linear drive motherboard 20 is further electrically connected to the second power supply interface 102 and the command output interface 301 through the colored light control circuit 22. The colored light control circuit 22 is in a powered state. The RGB lamp beads 43 are driven under the control of the wireless motherboard 20, so that the LED modular drive circuit can realize the RGB dynamic color setting by wirelessly receiving control instructions, thereby improving the intelligence level of the product. To further expand the application environment of the LED modular drive circuit.

It is worth mentioning that the wireless motherboard 30 and the colorful light control circuit 22 are powered by the same power supply interface, which is conducive to simplifying the circuit of the LED modular drive circuit and improving the power consumption of the LED modular drive circuit. utilization efficiency.

Further, referring to Figure 6, the colored light control circuit 22 includes at least one colored light connecting resistor R62 (R71, R72, R73, R74, R75, R76), a colored light first resistor R63, a colored light first resistor R63, Two resistors R58, one resistor R65, a fourth resistor R59, one resistor R69, a sixth resistor R64, one resistor FR1, one resistor R64 Two wire-wound resistors FR2, one colored light third wire-wound resistor FR3, one colored light first power switch tube Q1, one colored light second power switch tube Q2 and one colored light power switch tube Q3, wherein the colored light first power switch tube Q3 One end of a resistor R63 is connected to the eighth pin of the receiving and processing module 32 through the command output interface 301, and the other end of the first colored light resistor R63 is connected to the first colored light power switch Q1 gate, one end of the second resistor R58 is connected between the first colored light resistor R63 and the gate of the first colored light power switch tube Q1, the other end is grounded, and the source of the colored light first power switch tube Q1 is grounded, so The drain of the colored light first power switch Q1 is connected to one end of the colored light first wire-wound resistor FR1, and the other end of the colored light first wire-wound resistor FR1 is connected to the RGB lamp bead 43 , wherein the third colored light resistor R65 is connected to the third pin of the receiving processing module 32 through the command output interface 301, and the other end of the third colored light resistor R65 is connected to the third colored light resistor R65. The gate of the second power switch Q2, the source of the second colored light power switch Q2 is grounded, and one end of the fourth colored light resistor R59 is connected to the third colored light resistor R65 and the colored light third resistor R65. Between the gates of the second optical power switch Q2, the other end is grounded, and the drain of the second colored light power switch Q2 is connected to one end of the second colored light winding resistor FR2. The other end of the second optical wire-wound resistor FR2 is connected to the RGB lamp bead 43 , and one end of the fifth colored light resistor R69 is connected to the fourth end of the receiving and processing module 32 via the command output interface 301 . pin, the other end of the fifth colored light resistor R69 is connected to the gate of the third colored light power switch Q3, and one end of the sixth colored light resistor R64 is connected to the fifth colored light resistor Between R69 and the gate of the third colored light power switch Q3, one end of the sixth colored light resistor R64 is grounded, the source of the third colored light power switch Q3 is grounded, and the colored light third power switch Q3 is grounded. The drain of the third optical power switch Q3 is connected to one end of the third colored light winding resistor FR3, and the other end of the third colored light winding resistor FR3 is connected to the RGB lamp bead, where One end of the colored light connecting resistor R62 (R71, R72, R73, R74, R75, R76) is connected to the second power supply voltage output interface 102. The colored light connecting resistor R62 (R71, R72, R73, The other end of R74, R75, R76) is connected to the RGB lamp bead.

That is to say, compared with the existing isolated or non-isolated driving power supply, the LED modular drive circuit has a simple circuit design, controllable circuit design and production costs, and a long service life. The circuit has the practical application effects of low ripple, no flicker, high conversion efficiency, and high power factor. At the same time, based on the modular design of the LED modular drive circuit, the LED modular drive circuit can be more flexibly adapted to different conditions. For example, for users who have colored light requirements, the linear drive motherboard 20 including the colored light control circuit 22 is provided, while for users who do not need colored light, a linear drive motherboard 20 that only integrates the white light control circuit 21 is provided. The linear drive motherboard 20 eliminates the need to reconstruct the overall circuit, which is conducive to simplifying the corresponding production and design processes. At the same time, based on the wireless motherboard 30, the LED modular drive circuit can use infrared, radio frequency, WiFi, At least one method of Zigbee and Bluetooth can receive control instructions and realize the brightness and color temperature adjustment of the light, as well as the scheduled light off and various lighting scene mode settings. It can also realize the RGB dynamic color setting, which has a wide range of applications. Prospects and practicality.

Those skilled in the art should understand that the embodiments of the present invention shown in the above description and drawings are only examples and do not limit the present invention. The purpose of the utility model has been completely and effectively achieved. The functional and structural principles of the present invention have been shown and described in the embodiments. Without departing from the principles, the implementation of the present invention may have any deformation or modification.

Claims

The LED modular drive circuit is characterized by including:

A power supply mainboard, wherein the power supply mainboard has a first power supply voltage output interface and a second power supply voltage output interface. The power supply mainboard can be connected to an external power source to obtain electric energy and output it to the first power supply voltage output interface. and the second supply voltage output interface outputs electric energy of different voltages;

A wireless motherboard, wherein the wireless motherboard is pluggably and electrically connected to the second power supply voltage output interface to be powered by the power supply motherboard to receive control commands wirelessly, and output corresponding control commands through at least one command output interface. Control instruction;

A linear drive motherboard, wherein the linear drive motherboard is pluggably and electrically connected to the first supply voltage output interface and the command output interface, so that when the linear drive motherboard is electrically connected to the third The status of a power supply voltage output interface and the command output interface are controlled by the wireless motherboard to control the electric energy output by the power supply motherboard, thereby driving at least one light-emitting load connected to its output end.
The LED modular drive circuit according to claim 1, wherein the power supply mainboard integrates an adjustment circuit, a high-voltage power supply circuit and a low-voltage power supply circuit, wherein the input end of the adjustment circuit is connected to an external power supply, and the The input end of the high-voltage power supply circuit is connected to the output end of the adjustment circuit to obtain electrical energy through the adjustment circuit and output DC power at the first power supply interface, wherein the low-voltage power supply circuit is at the second power supply interface. A DC power energy different from the output voltage of the high-voltage power supply circuit is output.
The LED modular driving circuit according to claim 2, wherein the wireless motherboard includes a voltage conversion module and a receiving processing module, the voltage conversion module is electrically connected to the second supply voltage output interface to receive the The second power supply voltage output interface outputs electric energy, and adjusts the electric energy to a working voltage, so that the receiving and processing module is powered and receives control instructions.
The LED modular driving circuit according to claim 3, wherein the electric energy voltage output by the first supply voltage output interface is greater than the electric energy voltage output by the second supply voltage output interface.
The LED modular driving circuit according to claim 4, wherein the power voltage output by the second supply voltage output interface is 5-12V.
The LED modular driving circuit according to claim 5, wherein the working voltage of the receiving and processing module of the wireless motherboard is 3.3V±0.3V.
The LED modular drive circuit according to claim 4, wherein the linear drive motherboard integrates a white light control circuit and is electrically connected to the first power supply interface and the command output interface through the white light control circuit, wherein The white light control circuit is controlled by the wireless motherboard to control the DC power output by the power supply motherboard at the first power supply interface, thereby linearly driving the light-emitting load connected to its output end with a constant current, so that The luminous load is powered.
The LED modular drive circuit according to claim 7, wherein the light-emitting load is an LED lamp group composed of a plurality of LED lamp beads, and the LED lamp group includes at least one cool white warm lamp bead and at least one warm white warm lamp. beads, the cool white temperature lamp beads and the warm white temperature lamp beads are respectively connected to the output ends of the white light control circuit to be driven by the white light control circuit.
The LED modular drive circuit according to claim 8, wherein the linear drive motherboard further integrates a colored light control circuit and the colored light control circuit is further electrically connected to the second power supply interface and the instruction. Output interface, the LED lamp set further includes at least one RGB lamp bead, and the colored light control circuit is controlled by the wireless motherboard in a powered state to drive the RGB lamp bead connected to its output end.
The LED modular driving circuit according to claim 9, wherein the power voltage output by the first supply voltage output interface is 100-360V.