WO2023185426A1

WO2023185426A1 - Led driving circuit

Info

Publication number: WO2023185426A1
Application number: PCT/CN2023/080989
Authority: WO
Inventors: 武良举; 梁锦源
Original assignee: 佛山市威得士灯饰电器有限公司
Priority date: 2022-04-01
Filing date: 2023-03-13
Publication date: 2023-10-05
Also published as: CN217406764U

Abstract

The present application provides an LED driving circuit. The LED driving circuit comprises a power supply output unit, a linear driving unit, and a wireless receiving unit, wherein the power supply output unit is connected to an external power supply to output electric energy, and the linear driving unit is electrically coupled to the output end of the power supply output unit so as to obtain direct-current electric energy output by the power supply output unit and control the direct-current electric energy output by the power supply output unit, the wireless receiving unit is electrically coupled to the output end of the power supply output unit so as to be powered by the power supply output unit to wirelessly receive a control instruction, and the linear driving unit is communicatively connected to the wireless receiving unit, such that the wireless receiving unit controls the electric energy output by the power supply output unit according to the control instruction received by the wireless receiving unit in a controlled manner, so as to drive at least one light-emitting load connected to the output end of the linear driving unit.

Description

LED driver circuit

Technical field

The utility model relates to the technical field of LED drive control, and in particular to an LED 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 and overcurrent protection of the main circuit, as well as rectification, filtering, and voltage stabilization of each sub-circuit) Constant voltage, signal sampling feedback, etc.) are unreasonable, which easily causes this During the actual use of these types of lighting fixtures, the stability of the product and the smoothness of dimming and color adjustment are affected to a certain extent, affecting the user experience.

Utility model content

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

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

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

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

One object of the present invention is to provide an LED driving circuit, wherein the LED driving circuit realizes the brightness and color temperature adjustment of its light-emitting load by wirelessly receiving control instructions, as well as realizing scheduled lights off, various lighting scene mode settings, etc. Functional applications improve the intelligence level of products.

One purpose of this utility model is to provide an LED driving circuit that can ensure that the corresponding change effect of its luminous load during wireless operation is smooth, and will not cause undesirable phenomena such as light flickering, respiratory flickering, or failure to start. It is provided for use a good user experience.

An object of the present invention is to provide an LED driving circuit that is suitable for the driving requirements of multi-chromaticity dimming, so that the LED driving circuit has the ability to satisfy both the dimming requirements of cold white temperature lamp beads and warm white temperature lamp beads. Practicality.

One purpose of the present utility model is to provide an LED driving circuit that can also meet the dimming requirements of RGB three-color light beads, so as to improve the practicality of the LED driving circuit and make the LED driving circuit suitable for Various usage environments.

One purpose of the present invention is to provide an LED 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 environment of the LED drive circuit.

An object of the present invention is to provide an LED driving circuit, wherein the LED driving circuit It includes a power supply output unit, a linear drive unit and a wireless receiving unit, wherein the power supply output unit can be connected to an external power supply to obtain electrical energy, wherein the linear drive unit and the wireless receiving unit are respectively coupled to The output end of the power supply output unit is used to obtain the electric energy processed by the power supply output unit, wherein the linear driving unit is communicatively connected to the wireless receiving unit to receive the wireless receiving unit according to the wireless receiving unit. The control command wirelessly received by the unit controls the electric energy output by the power supply output unit, thereby driving at least one light-emitting load connected to its output end, thereby achieving the practical application effect of wirelessly controlling lamps and improving the intelligence of the product. level.

One object of the present invention is to provide an LED drive circuit, wherein the power supply output unit includes an adjustment circuit and a high-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 to deliver electric energy to the linear driving unit so that the linear driving unit can drive the light-emitting load.

An object of the present invention is to provide an LED driving circuit, wherein the power supply output unit includes a switch power supply circuit, wherein the wireless receiving unit is powered and coupled to the output end of the switch power supply circuit, and the switch power supply circuit It is used to output electric energy for the operation of the wireless receiving unit to ensure the normal operation of the wireless receiving unit and the working stability of the LED driving circuit.

An object of the present invention is to provide an LED driving circuit, wherein the linear driving unit includes a white light control circuit, wherein the input end of the white light control circuit is coupled to the output end of the high-voltage power supply circuit to receive power. The wireless receiving unit controls the DC power output by the high-voltage power supply circuit to linearly drive the luminous load connected to its output end with a constant current, so that the luminous load is powered.

One object of the present invention is to provide an LED driving 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 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.

One object of the present invention is to provide an LED drive circuit, wherein the linear drive unit includes 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 used for linear constant The RGB lamp bead is driven smoothly so that the RGB lamp bead is energized, so that the LED drive circuit can adapt to application scenarios requiring color lighting and improve the practicality of the LED drive circuit.

One object of the present invention is to provide an LED driving circuit, wherein the power supply output unit includes a low-voltage power supply circuit, wherein the input terminal of the colored light control circuit is power-coupled to the output terminal of the low-voltage power supply circuit, so as to The direct current power output by the low-voltage power supply circuit is controlled by the wireless receiving unit to drive the RGB lamp beads.

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

A power supply output unit, wherein the power supply output unit can be connected to an external power supply to output electrical energy;

A linear drive unit, wherein the linear drive unit is powered and coupled to the output end of the power supply output unit to control the electric energy output by the power supply output unit; and

A wireless receiving unit, wherein the wireless receiving unit is powered and coupled to the output end of the power supply output unit to be powered and wirelessly receive control instructions, wherein the linear driving unit is communicatively connected to the wireless receiving unit to The electric energy output by the power supply output unit is controlled by the wireless receiving unit according to the control instruction received by the wireless receiving unit, thereby driving at least one luminous load connected to its output end.

In an embodiment of the present invention, the linear driving unit includes a white light control circuit, wherein the input end of the white light control circuit is powered and coupled to the output end of the power supply output unit to receive the wireless signal. The receiving unit controls the electric energy output by the power supply output unit.

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 power supply output unit includes an adjustment circuit and a high-voltage power supply circuit, wherein the input end of the adjustment circuit is connected to an external power supply, and the input end of the high-voltage power supply circuit is connected At the output end of the adjustment circuit, electric energy is obtained through the adjustment circuit and DC power is output, wherein the input end of the white light control circuit is coupled to the output end of the high-voltage power supply circuit to supply power to the high-voltage power supply circuit. The DC power output from the power supply circuit is controlled.

In an embodiment of the present invention, the power supply output unit includes a switching power supply circuit, wherein the wireless receiving unit is powered and coupled to the output end of the switching power supply circuit, and the switching power supply circuit is used to output Electric energy for the operation of the wireless receiving unit.

In an embodiment of the present invention, the linear drive unit further includes a colored light control Circuit, wherein the LED lamp set further includes at least one RGB lamp bead, wherein the RGB lamp bead is connected to the output end of the colored light control circuit to be driven by the colored light control circuit.

In an embodiment of the present invention, the power supply output unit further includes a low-voltage power supply circuit, wherein the input end of the colored light control circuit is coupled to the output end of the low-voltage power supply circuit to receive the required power. The wireless receiving unit controls the DC power output by the low-voltage power supply circuit.

In an embodiment of the present invention, the white light control circuit includes a first resistor, a second resistor, a third resistor, a fourth resistor, at least one white light constant current control chip and the white light constant current control chip. The number of flow control chips corresponds to at least one fifth resistor and at least one sixth resistor, wherein the white light constant current control chip has eight pins, and the first pin of the white light constant current control chip is connected to the One end of the second resistor, the other end of the second resistor is connected to the wireless receiving unit, one end of the first resistor is connected between the second resistor and the wireless receiving unit, the white light The second pin of the constant current control chip is connected to one end of the fifth resistor, the third pin of the white light constant current control chip is connected to one end of the fourth resistor, and the other end of the fourth resistor is connected to Connected to the wireless receiving unit, one end of the third resistor is connected between the fourth resistor and the wireless receiving unit, and the fourth pin of the white light constant current control chip is connected to the sixth One end of the resistor, the other end of the first resistor, the third resistor, the fifth resistor and the sixth resistor is grounded, and the fifth pin of the white light constant current control chip is connected to the Cool white temperature lamp bead, the sixth pin of the white light constant current control chip is connected to the warm white temperature lamp bead, the eighth pin of the white light constant current control chip is connected to the high voltage power supply circuit, the The cool white temperature lamp bead and the warm white temperature lamp bead are respectively connected between the eighth pin of the white light constant current control chip and the high voltage power supply circuit.

In an embodiment of the present invention, the wireless receiving unit includes a processing control chip and a receiving circuit, wherein the processing control chip has fourteen pins, and the other end of the second resistor is connected to the The eleventh pin of the processing control chip, the other end of the fourth resistor is connected to the fourth pin of the processing control chip, and the colored light control circuit is connected to the eighth pin of the processing control chip, The tenth pin of the processing control chip is connected to the switch power supply circuit, and the receiving circuit is connected to the fifth pin of the processing control chip.

In an embodiment of the present invention, the colored light control circuit includes a seventh resistor, an eighth resistor, a ninth resistor, a tenth resistor, a first power switch, and a second power switch. tube, a triode, a first capacitor, a second capacitor, a third capacitor, a fourth capacitor, a fifth capacitor, a sixth capacitor, a seventh capacitor, an eighth capacitor, a ninth capacitor and a tenth capacitor, wherein the second The drain of the power switch is connected to the output end of the low-voltage power supply circuit, the gate of the second power switch is connected to one end of the tenth resistor, and the other end of the tenth resistor is connected to The low-voltage power supply circuit, wherein the drain of the first power switch is connected to the output end of the low-voltage power supply circuit, and the gate of the first power switch is connected to one end of the ninth resistor, The source of the first power switch and the source of the second power switch are connected to the input end of the lamp bead, wherein the first capacitor, the second capacitor and the third capacitor , the fourth capacitor, the fifth capacitor, the sixth capacitor, the seventh capacitor, the eighth capacitor, the ninth capacitor and the tenth capacitor are arranged in parallel, To form a filter unit of the colored light control circuit, one end of the filter unit is grounded, and the other end of the filter unit is connected to the first power switch tube, the lamp bead and the second Between the power switch tube and the RGB lamp bead, the other end of the ninth resistor is connected to the collector of the triode, and the emitter of the triode is connected to one end of the eighth resistor, where the The emitter of the triode and one end of the eighth resistor are grounded, the other end of the eighth resistor is connected to the base of the triode, and one end of the seventh resistor is connected to the processing control The eighth pin of the chip and the other end of the seventh resistor are connected to the base of the triode.

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 an LED driving circuit according to an embodiment of the present invention.

FIG. 2 is a schematic block diagram of the circuit structure of the LED driving circuit according to the above embodiment of the present invention.

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

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

FIG. 5 is a partial circuit schematic diagram of the LED driving circuit according to the above embodiment of the present invention.

FIG. 6 is a schematic block diagram of the circuit structure of the LED driving circuit according to a modified embodiment of the above-mentioned embodiment of the present invention.

FIG. 7 is a partial circuit schematic diagram of the LED driving circuit according to the above-mentioned modified embodiment of the present invention.

FIG. 8 is a partial circuit schematic diagram of the LED driving 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, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

The utility model provides an LED driving circuit, which obtains electric energy from an external power supply 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, one end of the LED driving circuit close to the external power supply is As the input end, the end close to the light-emitting load 40 serves as the output end.

Specifically, with reference to Figure 1 of the accompanying drawings of the present utility model, the LED driving circuit includes a power supply output unit 10, a linear drive unit 20 and a wireless receiving unit 30, wherein the power supply output unit 10 can The linear drive unit 20 is connected to an external power source to output electric energy. The linear driving unit 20 is coupled to the output end of the power supply output unit 10 to obtain the DC power output by the power supply output unit 10 and output the power to the power supply unit 10 . The DC power output from unit 10 is controlled, wherein the linear drive The dynamic unit 20 is controlled by the wireless receiving unit 30 to control the DC power output by the power supply output unit 10. Specifically, the wireless receiving unit 30 is electrically coupled to the output of the power supply output unit 10. end, to be powered by the power output unit 10 and wirelessly receive control instructions. The linear driving unit 20 is communicatively connected to the wireless receiving unit 30 to receive the wireless receiving unit 30 according to the wireless receiving unit 30 The received control command controls the electric energy output by the power supply output unit 10 to drive at least one light-emitting load 40 connected to its output end, thereby realizing the practical application effect of wirelessly controlling the lamp and improving the intelligence of the product. level.

Further, with reference to Figures 2 to 5 of the accompanying drawings of the present utility model, the power supply output unit 10 includes an adjustment circuit 11 and a high-voltage power supply circuit 12, wherein the input end of the adjustment circuit 11 is connected The voltage of the AC mains power connected to the adjustment circuit 11 is 200V to 240V, and it can be understood that depending on the power grid environment, the voltage of the AC mains power will vary. The utility model does not limit the differences. 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 direct current.

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 temperature lamp bead 42, wherein the cool white temperature lamp bead 41 and the warm white temperature lamp bead 42 are respectively connected to the output end of the linear drive unit 20 to be linearly driven. The unit 20 is driven, wherein the color temperature of the cool white temperature lamp bead 41 is 4500k to 8000k, and the color temperature of the warm white temperature lamp bead 42 is 1800k to 4000k.

In particular, the linear driving unit 20 includes a white light control circuit 21 , wherein the input end of the white light control circuit 21 is powered and coupled to the output end of the high-voltage power supply circuit 12 to receive the wireless receiving unit 30 The DC power output by the high-voltage power supply circuit 12 is controlled in a controlled manner, wherein the output end of the white light control circuit 21 is connected to the cold white temperature lamp bead 41 and the warm white temperature lamp bead 42. The input end of the light-emitting load 40 is used to drive the cool white temperature lamp bead 41 and the warm white temperature lamp bead 42, so that the LED driving circuit is suitable for the driving requirements of multi-chromaticity dimming. The dimming requirements of the white warm lamp beads 41 and the warm white warm lamp beads 42 are both practical.

Further, with specific reference to FIG. 3 , the circuit of the power supply output unit 10 of the LED drive circuit in this embodiment of the present invention is schematically illustrated, wherein the high-voltage power supply circuit 12 includes a boost-type constant voltage drive chip. U2, the input end of the boost constant voltage driver chip U2 is connected to the adjustment circuit The output end of 11, the output end of the boost-type constant voltage driver chip U2 is connected to the white light control circuit 21 to output high-voltage direct current to the white light control circuit 21.

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:

Those skilled in the art should understand that the high-voltage power supply circuit 12 also includes peripheral circuits of the boost-type constant voltage driver chip U2, such as resistors R20, R17, R16, R13, R14, R15, R18, R19, R2, diodes D5, D1, chip capacitors C1, C6, electrolytic capacitors E1, E4, inductor L2, etc. are determined according to the specific circuit related parameter design, and the utility model does not limit this.

The adjustment circuit 11 has two input terminals. One input terminal of the adjustment circuit 11 is connected to the L terminal of the AC mains power, and the other input terminal of the adjustment circuit 11 is connected to the N terminal of the AC mains power. Connect to AC mains power.

Further, the power supply output unit 10 includes a switching power supply circuit 13, wherein the wireless receiving unit 30 is powered and coupled to the output end of the switching power supply circuit 13, and the switching power supply circuit 13 is used to output the power supply. The electric energy provided by the wireless receiving unit 30 is used to ensure the normal operation of the wireless receiving unit 30 and the working stability of the LED driving circuit.

It is worth mentioning that, in this embodiment of the present invention, the switch power supply circuit 13 outputs 3.3V direct current to power the wireless receiving unit 30 .

Further, with specific reference to Figure 4 of the accompanying drawings, the white light control circuit 21 includes a first resistor R52, a second resistor R57, a third resistor R53, a fourth resistor R56, and at least one white light constant current control circuit. Chip U3 and at least one fifth resistor R33 (R35, R36, R42) and at least one sixth resistor R48 (R35, R41, R43), 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 second resistor R57, and the other end of the second resistor R57 is connected to the wireless Receiving unit 30, one end of the first resistor R52 is connected between the second resistor R57 and the wireless receiving unit 30, and the other end of the first resistor R52 is grounded, wherein the white light constant current control The second pin of chip U7 (U8, U9, U10) is connected to one end of the fifth resistor R33 (R35, R36, R42) to be connected to ground through the fifth resistor R33 (R35, R36, R42). , wherein the third pin of the white light constant current control chip U7 (U8, U9, U10) is connected to one end of the fourth resistor R56, and the other end of the fourth resistor R56 is connected to the wireless receiving unit 30. One end of the third resistor R53 is connected between the fourth resistor R56 and the wireless receiving unit 30, and the other end of the third resistor R53 is grounded, wherein the white light constant current control chip U7 The fourth pin of (U8, U9, U10) is connected to one end of the sixth resistor R48 (R35, R41, R43), and the other end of the sixth resistor R48 (R35, R41, R43) is grounded, where The fifth pin of the white light constant current control chip U7 (U8, U9, U10) 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 white light constant current control chip U7 (U8, U9, U10) is connected to the output end of the high voltage power supply circuit 12, and the cool white temperature lamp Bead 41 and the warm white temperature lamp bead 42 are respectively connected between the eighth pin of the white light constant current control chip U7 (U8, U9, U10) and the high-voltage power supply circuit 12, so that the white light The control circuit 21 can drive the cool white temperature lamp beads 41 and the warm white temperature lamp under the control of the wireless receiving unit 30 beads 42, thereby making the LED driving circuit suitable for the driving requirements of multi-chromaticity dimming and improving the practicality of the LED driving 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 drive circuit has low ripple, It has the characteristics of no flicker, high conversion efficiency and high power factor, so it can ensure the user's experience during actual use, so that when the user wirelessly operates the LED drive circuit, the cool white temperature lamp The bead 41 and the warm white temperature lamp bead 42 change smoothly according to the user's operation instructions, and there will be no undesirable phenomena such as light flickering, breathing flickering or failure to start, giving the user a good use experience. In addition, , it is also worth mentioning that in some embodiments of the present utility model, the white light constant current control chip U7 (U8, U9, U10) can also be implemented as a multi-channel PWM dimmable LED high-voltage linear constant. Stream driver chip.

Further, with specific reference to Figure 5 of the accompanying drawings of the present utility model, the circuit of the wireless receiving unit 30 is schematically illustrated, wherein the wireless receiving unit 30 includes a processing control chip IC1 and a receiving circuit, wherein the processing control The chip IC1 has fourteen pins. The other end of the second resistor R57 is connected to the eleventh pin of the processing control chip IC1. The other end of the fourth resistor R56 is connected to the processing control chip IC1. The fourth pin, the specific pins of the processing control chip IC1 are as shown in the following table:

In detail, the wireless receiving unit 30 further includes a diode D1 and a power supply filtering unit composed of capacitors C14 and C13. The power supply of the wireless receiving unit 30 is input from the anode of the diode D1. The capacitor C14 and The capacitor C13 is arranged in parallel, one end of the capacitor C14 and the capacitor C13 is connected to the cathode of the diode D1, and the other end of the capacitor C14 and the capacitor C13 is grounded, wherein the process The first pin of the control chip IC1 is connected to the cathode of the diode D1, and the power supply filtering unit is disposed between the processing control chip IC1 and the diode D1 to provide power to the processing control chip IC1. Filtering processing ensures the working stability of the processing control chip IC1.

Further, the receiving circuit includes a receiver, a resistor R63 and a capacitor C11, wherein the output end of the receiver is connected to the fifth pin of the processing control chip IC1, and one end of the resistor R63 is connected to The cathode of the diode D1 and the other end of the resistor R63 are connected to the input end of the receiver, and one end of the capacitor C11 is connected between the resistor R63 and the receiver. The capacitor The other end of C11 is connected to ground.

It is worth mentioning that the receiver can be implemented as a wireless receiver such as an infrared receiver, a radio frequency receiver, a WiFi module, a Zigbee module and a Bluetooth module, or as a combination receiver of various types of wireless receivers, For example, the receiver can receive infrared signals and radio frequency signals to enrich the wireless receiving function of the LED driving circuit, so that the LED driving circuit can be suitable for various application scenarios and meet different usage requirements.

In particular, the instructions received by the receiver include, but are not limited to, adjusting the brightness and color temperature of the light-emitting load 40, and implementing instructions such as timing lights off and setting various lighting scene modes, so that the user can adjust the brightness and color temperature of the light-emitting load 40. The LED drive circuit can wirelessly adjust the brightness and color temperature of the light-emitting load 40 , and implement functional applications such as scheduled light off and various lighting scene mode settings, thereby improving the intelligence level of the product.

It is worth mentioning that the LED driving circuit can also meet the dimming requirements of RGB three-color light beads, thereby improving the practicality of the LED driving circuit and making the LED driving circuit applicable to a variety of For specific usage environment, refer to Figure 6 of the accompanying drawings of the description of the present utility model. The circuit structure block diagram of the LED drive circuit according to a modified embodiment of the above-mentioned embodiment of the present utility model is schematically illustrated, in which all the components of the LED drive circuit are shown. The linear driving unit 20 further includes a colored light driving circuit 22, The LED lamp set further includes at least one RGB lamp bead 43, wherein the RGB lamp bead 43 is connected to the output end of the colored light control circuit 22 to be driven by the colored light control circuit 22, so that the The LED drive circuit can be adapted to application scenarios requiring color lighting, thereby improving the practicality of the LED drive circuit.

Further, in order to satisfy the power supply of the colored light driving circuit 22, the power supply output unit 11 further includes a low-voltage power supply circuit 14 for supplying power to the colored light driving circuit 22, wherein the input of the colored light control circuit 22 The terminal is powered and coupled to the output terminal of the low-voltage power supply circuit 14, and is controlled by the DC power output by the low-voltage power supply circuit 14, thereby realizing driving of the RGB lamp beads 43. Preferably, the low-voltage power supply circuit 14 outputs 5V DC power.

It is worth mentioning that the colored light control circuit 22 is connected to the eighth pin of the processing control chip IC1, so that the colored light control circuit 22 is controlled by the wireless receiving unit to supply power to the low voltage. The DC power output by the circuit is controlled, so that the LED drive circuit can realize the RGB dynamic color setting by wirelessly receiving control instructions, improve the intelligence level of the product, and further expand the application environment of the LED drive circuit.

Specifically, with reference to Figure 7 of the accompanying drawings of the present utility model, the circuit of the power supply input unit 10 of the LED drive circuit is schematically illustrated, in which the low-voltage power supply circuit 14 includes a constant current control chip U1, and the constant current control chip U1 is The input end of the flow control chip U1 is connected to the power supply, and the output end of the constant current control chip U1 is connected to the colored light drive circuit 22 to deliver DC power to the colored light control circuit 22. The constant current The specific pins of the control chip U1 are shown in the following table:

It should be understood that the peripheral circuits required by the constant current control chip U1 include resistors R4, R5, R6, R7, R8, R9, R10, R11, R12, R3, electrolytic capacitors E2, E3, capacitors C3, C4, C5, two The pole tubes D2, D3, D4, D7, the transformer T1, etc. are designed according to the relevant parameters of the specific circuit, and the utility model does not limit this.

Further, referring to Figure 8, the colored light control circuit 22 includes a seventh resistor R64, an eighth resistor R65, a ninth resistor R59, a tenth resistor R58, a first power switch U4, a first Two power switch tubes U5, a transistor U6, a first capacitor C1, a second capacitor C2, a third capacitor C3, a fourth capacitor C4, a fifth capacitor C5, a sixth capacitor C6, and a seventh capacitor C7, an eighth capacitor C8, a ninth capacitor C9 and a tenth capacitor C10, wherein the drain of the second power switch U5 is connected to the output end of the low-voltage power supply circuit 14, and the second power switch U5 The gate of the switch U5 is connected to one end of the tenth resistor R58, and the other end of the tenth resistor R58 is connected to the low-voltage power supply circuit 12, wherein the drain of the first power switch U4 is connected to one end of the tenth resistor R58. Connected to the output end of the low-voltage power supply circuit 14, the gate of the first power switch U4 is connected to one end of the ninth resistor R59, the source of the first power switch U5 and the third The sources of the two power switches U5 are connected to the input terminals of the RGB lamp beads 43, wherein the first capacitor C1, the second capacitor C2, the third capacitor C3, the fourth capacitor C4, The fifth capacitor C5, the sixth capacitor C6, the seventh capacitor C7, the eighth capacitor C8, the ninth capacitor C9 and the tenth capacitor C10 are arranged in parallel and one end is grounded to form a filter unit of the colored light control circuit 22, wherein the other end of the filter unit is connected to the first power switch tube U4, the RGB lamp bead 43 and the second power switch Between the tube U5 and the RGB lamp bead 43, the other end of the ninth resistor R59 is connected to the collector of the transistor U6, and the emitter of the transistor U6 is connected to the eighth resistor R65. One end, wherein the emitter of the transistor U6 and one end of the eighth resistor R65 are grounded, the other end of the eighth resistor R65 is connected to the base of the transistor U6, and the seventh resistor R64 One end of the seventh resistor R64 is connected to the eighth pin of the processing control chip IC1, and the other end of the seventh resistor R64 is connected to the base of the transistor U6.

That is to say, compared with the existing isolated or non-isolated driving power supply, the LED driving circuit has simple circuit design, controllable circuit design and production costs, long service life, and the LED driving circuit has low ripple The practical application effects of wave, no flicker, high conversion efficiency, and high power factor. At the same time, based on the wireless receiving unit 30, the LED driving circuit can receive at least one of infrared, radio frequency, WiFi, Zigbee, and Bluetooth. Control instructions, and realize the adjustment of the brightness and color temperature of the light, as well as the realization of scheduled light turning off and various lighting scene mode settings. It can also realize the RGB dynamic color setting, which has broad application 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 utility model have been shown and described in the embodiments. Without departing from the principles, the implementation of the present utility model may have any deformation or modification.

Claims

The LED drive circuit is characterized by including:

A power supply output unit, wherein the power supply output unit can be connected to an external power supply to output electrical energy;

A linear drive unit, wherein the linear drive unit is powered and coupled to the output end of the power supply output unit to control the electric energy output by the power supply output unit; and

A wireless receiving unit, wherein the wireless receiving unit is powered and coupled to the output end of the power supply output unit to be powered and wirelessly receive control instructions, wherein the linear driving unit is communicatively connected to the wireless receiving unit to The electric energy output by the power supply output unit is controlled by the wireless receiving unit according to the control instruction received by the wireless receiving unit, thereby driving at least one luminous load connected to its output end.
The LED driving circuit of claim 1, wherein the linear driving unit includes a white light control circuit, wherein an input end of the white light control circuit is power coupled to an output end of the power supply output unit to receive the The wireless receiving unit controls the electric energy output by the power supply output unit.
The LED drive circuit according to claim 2, 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 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.
The LED drive circuit according to claim 3, wherein the power supply output unit includes an adjustment circuit and a high-voltage power supply circuit, wherein the input end of the adjustment circuit is connected to an external power supply, and the input end of the high-voltage power supply circuit is connected to Connected to the output end of the adjustment circuit to obtain electrical energy through the adjustment circuit and output DC power, wherein the input end of the white light control circuit is powered and coupled to the output end of the high-voltage power supply circuit to power the The DC power output from the high-voltage power supply circuit is controlled.
The LED driving circuit of claim 4, wherein the power output unit includes a switching power supply circuit, and wherein the wireless receiving unit is powered and coupled to the output end of the switching power supply circuit, The switch power supply circuit is used to output electric energy for the operation of the wireless receiving unit.
The LED driving circuit of claim 5, wherein the linear driving unit further includes a colored light control circuit, wherein the LED lamp group further includes at least one RGB lamp bead, wherein the RGB lamp bead is connected to the The output end of the colored light control circuit is driven by the colored light control circuit.
The LED driving circuit according to claim 6, wherein the power output unit includes a low-voltage power supply circuit, wherein the input end of the colored light control circuit is coupled to the output end of the low-voltage power supply circuit to receive the required power. The wireless receiving unit controls the DC power output by the low-voltage power supply circuit.
The LED drive circuit according to claim 7, wherein the white light control circuit includes a first resistor, a second resistor, a third resistor, a fourth resistor, at least one white light constant current control chip and the white light constant current control chip. The number of constant current control chips corresponds to at least one fifth resistor and at least one sixth resistor, wherein the white light constant current control chip has eight pins, and the first pin of the white light constant current control chip is connected to all One end of the second resistor, the other end of the second resistor is connected to the wireless receiving unit, one end of the first resistor is connected between the second resistor and the wireless receiving unit, the The second pin of the white light constant current control chip is connected to one end of the fifth resistor, the third pin of the white light constant current control chip is connected to one end of the fourth resistor, and the other end of the fourth resistor is connected to the wireless receiving unit, one end of the third resistor is connected between the fourth resistor and the wireless receiving unit, and the fourth pin of the white light constant current control chip is connected to the third One end of the six resistors, the other ends of the first resistor, the third resistor, the fifth resistor and the sixth resistor are grounded, and the fifth pin of the white light constant current control chip is connected to the As for the cold white temperature lamp bead, the sixth pin of the white light constant current control chip is connected to the warm white temperature lamp bead, and the eighth pin of the white light constant current control chip is connected to the high voltage power supply circuit. The cool white temperature lamp bead and the warm white temperature lamp bead are respectively connected between the eighth pin of the white light constant current control chip and the high voltage power supply circuit.
The LED driving circuit of claim 8, wherein the wireless receiving unit includes a processing control chip and a receiving circuit, wherein the processing control chip has fourteen pins, and the other end of the second resistor is connected to The eleventh pin of the processing control chip and the other end of the fourth resistor are connected At the fourth pin of the processing control chip, the colored light control circuit is connected to the eighth pin of the processing control chip, and the tenth pin of the processing control chip is connected to the switch power supply circuit. The receiving circuit is connected to the fifth pin of the processing control chip.
The LED driving circuit of claim 9, wherein the colored light control circuit includes a seventh resistor, an eighth resistor, a ninth resistor, a tenth resistor, a first power switch, a second power switch Switch tube, a transistor, a first capacitor, a second capacitor, a third capacitor, a fourth capacitor, a fifth capacitor, a sixth capacitor, a seventh capacitor, an eighth capacitor, and a ninth capacitor and a tenth capacitor, wherein the drain of the second power switch is connected to the output end of the low-voltage power supply circuit, and the gate of the second power switch is connected to one end of the tenth resistor, The other end of the tenth resistor is connected to the low-voltage power supply circuit, wherein the drain of the first power switch is connected to the output end of the low-voltage power supply circuit, and the gate of the first power switch is is connected to one end of the ninth resistor, the source electrode of the first power switch tube and the source electrode of the second power switch tube are connected to the input end of the lamp bead, wherein the first capacitor, The second capacitor, the third capacitor, the fourth capacitor, the fifth capacitor, the sixth capacitor, the seventh capacitor, the eighth capacitor, the ninth capacitor and the The tenth capacitor is arranged in parallel to form a filter unit of the colored light control circuit, wherein one end of the filter unit is grounded, and the other end of the filter unit is connected to the first power switch between the tube and the lamp bead and the second power switch tube and the RGB lamp bead, wherein the other end of the ninth resistor is connected to the collector of the triode, and the emitter of the triode is connected One end of the eighth resistor is grounded between the emitter of the triode and one end of the eighth resistor, and the other end of the eighth resistor is connected to the base of the triode. One end of the seventh resistor is connected to the eighth pin of the processing control chip, and the other end of the seventh resistor is connected to the base of the triode.