CN113630929A - Dimming and color mixing control circuit and LED lighting device - Google Patents

Abstract

The invention discloses a light and color adjusting control circuit and a lighting device, wherein the light and color adjusting control circuit comprises a singlechip module, a constant current driving module and an MOS (metal oxide semiconductor) tube assembly, the MOS tube assembly comprises at least two MOS tubes, at least part of the at least two MOS tubes are respectively connected with a driving interface of the singlechip module to respectively receive PWM (pulse width modulation) signals of the singlechip module so as to respectively control the on-off of the MOS tubes through the PWM signals, the LED light-emitting component comprises at least two groups of LED lamp strings, the first ends of the at least two groups of LED lamp strings are connected with the constant-current driving module, and the second ends of the at least two groups of LED lamp strings are respectively connected with the MOS tubes of the driving interfaces of the single chip microcomputer module. The invention greatly reduces the cost and avoids the risk of system overload.

Description

Dimming and color mixing control circuit and LED lighting device

Technical Field

The invention relates to the technical field of LED driving, in particular to a dimming and color-mixing control circuit and an LED lighting device.

Background

At present, conventional RGB color light or color temperature adjustable LED lamps in the market usually adopt 3 or 2 separate LED constant current drives to realize the light emission and output of different color lamp beads, and such a driving method has the following disadvantages: (1) the cost is high, and under the condition of lacking a chip nowadays, the cost of the product is increased; (2) power control is difficult.

Specifically, at present, 2 paths of constant current drive are generally adopted to drive 2 paths of white light LEDs with different color temperatures, then 2 paths of drive respectively output white lights with different powers, and the white lights with the required color temperatures are synthesized through an optical system, so that the power which is added and output by 2 paths of constant current drive exceeds the total function of the system in the operation process, and overload is caused; the color light is independently driven by 3 paths of LED constant current to output red, green and blue, so that the color of the light is adjusted, each path of the 3 paths of LED constant current drives can output the maximum power of a system, and when the color light is applied, each path of the 3 paths of LED constant current drives outputs a certain proportion of power to synthesize the light with the required color; in fact, the constant current driving of the LED is not a completely linear output, which can easily cause overload. For the above problems, the current mainstream method is to leave a margin for the output of the single-path LED constant current drive, so as to reduce the power output of the system, or increase the cost, and add peripheral elements to limit, so as to increase the risk of system failure.

The above background disclosure is only for the purpose of assisting understanding of the concept and technical solution of the present invention and does not necessarily belong to the prior art of the present patent application, and should not be used for evaluating the novelty and inventive step of the present application in the case that there is no clear evidence that the above content is disclosed at the filing date of the present patent application.

Disclosure of Invention

In order to solve the technical problems, the invention provides a dimming and toning control circuit and an LED lighting device, which not only greatly reduce the cost, but also can avoid the risk of system overload.

In order to achieve the purpose, the invention adopts the following technical scheme:

the invention discloses a light and color adjusting control circuit for controlling the brightness change and/or color temperature change of an LED light-emitting component, which comprises a singlechip module, a constant current driving module and an MOS tube component, wherein the MOS tube component comprises at least two MOS tubes, at least part of the at least two MOS tubes are respectively connected with a driving interface of the singlechip module to respectively receive PWM signals of the singlechip module so as to respectively control the on-off of the MOS tubes through the PWM signals, at least two groups of PWM signals in the PWM signals respectively received by the MOS tubes respectively connected with the driving interface of the singlechip module are mutually complementary in any preset period, the constant current driving module is connected with a brightness adjusting interface of the singlechip module so as to receive the brightness adjusting signals of the singlechip module, the LED light-emitting component comprises at least two groups of LED lamp strings, and the first ends of the at least two groups of LED lamp strings are connected with the constant current driving module, and the second end is respectively connected with the MOS tubes of the driving interfaces connected with the singlechip module.

Preferably, the MOS tube assembly includes a first MOS tube unit, the first MOS tube unit includes a plurality of first MOS tubes, the number of the first MOS tubes corresponds to the number of the LED light strings one to one, wherein drain electrodes of the plurality of first MOS tubes are respectively connected to second ends of the corresponding LED light strings, gate electrodes are respectively connected to each driving interface of the single chip module, and source electrodes are connected to the constant current driving module.

Preferably, the LED light emitting assembly includes a red LED string, a green LED string, and a blue LED string.

Preferably, the LED light emitting assembly includes a cold white LED string and a warm white LED string.

Preferably, the LED light emitting assembly includes a plurality of LED light emitting units, each of the LED light emitting units includes at least two groups of LED light strings, and the MOS tube assembly includes a first MOS tube unit and a second MOS tube unit; the first MOS tube unit comprises a plurality of first MOS tubes, the second MOS tube unit comprises a plurality of second MOS tubes, the number of the first MOS tubes corresponds to that of the LED lamp strings one by one, and the number of the second MOS tubes corresponds to that of the LED light-emitting units one by one; the drain electrodes of the first MOS tubes are respectively connected to the second ends of the corresponding LED lamp strings, the grid electrodes are respectively connected to the driving interfaces of the singlechip module, the source electrodes are respectively connected with the drain electrodes of the second MOS tubes, the source electrodes of the second MOS tubes are respectively connected with the constant current driving module, and the grid electrodes of the second MOS tubes are respectively connected to the control interfaces of the singlechip module.

Preferably, the LED light emitting assembly includes a first LED light emitting unit and a second LED light emitting unit, the first LED light emitting unit and the second LED light emitting unit respectively include at least two groups of LED lamp strings, and the MOS tube assembly includes a first MOS tube unit, a second MOS tube unit, and a third MOS tube unit; the first MOS tube unit comprises a plurality of first MOS tubes, the second MOS tube unit comprises a second MOS tube and a third MOS tube, the third MOS tube unit comprises a fourth MOS tube, and the number of the first MOS tubes corresponds to the number of the LED lamp strings one by one; the drain electrodes of the first MOS tubes are respectively connected to the second ends of the corresponding LED lamp strings, the grid electrodes are respectively connected to the driving interfaces of the singlechip module, the source electrodes of the first MOS tubes correspondingly connected with the first LED light-emitting units are respectively connected with the drain electrodes of the second MOS tubes, the source electrodes of the first MOS tubes correspondingly connected with the second LED light-emitting units are respectively connected with the drain electrodes of the third MOS tubes, the source electrodes of the second MOS tubes and the third MOS tubes are respectively connected with the constant current driving module, the grid electrodes of the second MOS tubes and the drain electrodes of the fourth MOS tubes are respectively connected with the power interface of the singlechip module, the grid electrodes of the third MOS tubes and the fourth MOS tubes are respectively connected with the same control interface of the singlechip module, and the source electrode of the fourth MOS tube is grounded.

Preferably, the first LED light emitting unit includes a red LED light string, a green LED light string and a blue LED light string, and the second LED light emitting unit includes a cold white LED light string and a warm white LED light string.

Preferably, the grid electrode of the second MOS transistor and the drain electrode of the fourth MOS transistor are both connected to the power interface of the single chip microcomputer module through pull-up resistors.

The invention also discloses an LED lighting device which comprises an LED light-emitting component and the dimming and color-mixing control circuit.

Compared with the prior art, the invention has the beneficial effects that: the dimming and color mixing control circuit disclosed by the invention only needs to use one path of constant current driving module and drive different lamp strings in a time-sharing mode through a complementary PWM signal mode so as to realize the dimming and color mixing control function by using fewer components, reduce the use amount of chips and greatly reduce the cost; in addition, the singlechip module directly outputs a brightness adjusting signal (namely a power adjusting signal) to the constant current driving module to directly control the power of the lamp string which correspondingly works, so that the power can be conveniently controlled.

In a further scheme, two groups of light strings of white light adjustable color temperature can be simultaneously controlled based on the light and color adjusting control circuit, three groups of light strings of color RGB can be simultaneously controlled, and five groups of light strings of white light adjustable color temperature + color RGB can be simultaneously controlled.

Drawings

FIG. 1 is a schematic structural diagram of an LED lighting device according to a preferred embodiment of the present invention;

FIG. 2 is a diagram of a complementary two-way PWM waveform structure in accordance with a preferred embodiment of the present invention;

fig. 3 is a detailed structural schematic diagram of an LED lighting device according to a first embodiment of the invention;

fig. 4 is a detailed structural schematic diagram of an LED lighting device according to a second embodiment of the present invention;

fig. 5 is a detailed structural schematic diagram of an LED lighting device according to a third embodiment of the present invention.

Detailed Description

The embodiments of the present invention will be described in detail below. It should be emphasized that the following description is merely exemplary in nature and is not intended to limit the scope of the invention or its application.

It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or be indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or be indirectly connected to the other element. In addition, the connection may be for either a fixed function or a circuit/signal communication function.

It is to be understood that the terms "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are used in an orientation or positional relationship indicated in the drawings for convenience in describing the embodiments of the present invention and to simplify the description, and are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed in a particular orientation, and be in any way limiting of the present invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the embodiments of the present invention, "a plurality" means two or more unless specifically limited otherwise.

As shown in fig. 1, a preferred embodiment of the present invention discloses an LED lighting device, which includes an LED lighting assembly 10 and a dimming and toning control circuit, wherein the dimming and toning control circuit is used for controlling the brightness change and/or the color temperature change of the LED lighting assembly 10. Specifically, the dimming and color-mixing control circuit includes a single chip microcomputer module 20, a constant current driving module 30 and a MOS tube assembly 40, in the preferred embodiment, the MOS tube assembly 40 includes two MOS tubes 41, the two MOS tubes 41 are respectively connected to a driving interface of the single chip microcomputer module 20 to respectively receive a PWM signal of the single chip microcomputer module 20 and respectively control the on/off of the MOS tubes 41 through the PWM signal, wherein two sets of PWM signals received by the two MOS tubes 41 are mutually complementary in any preset period, the constant current driving module 30 is connected to a brightness adjusting interface of the single chip microcomputer module 20 to receive a brightness adjusting signal (i.e., a power adjusting signal) of the single chip microcomputer module 20, the LED light emitting assembly 10 includes two sets of LED light strings 11, first ends of the two sets of LED light strings 11 are both connected to the constant current driving module 30, and second ends thereof are respectively connected to the respective MOS tubes 41.

In the two sets of PWM signals, which are mutually complementary in any predetermined period, one of the signals is at a high level, and the other of the signals, which is complementary, is necessarily at a low level, or vice versa, as shown in fig. 2, the channel B is at a low level when the channel a is at a high level, and the channel B is at a high level when the channel a is at a low level.

The dimming and color-mixing control circuit in the preferred embodiment can also be applied to an LED light-emitting component including more than two groups of LED light strings, and still can drive more than two groups of LED light strings in a time-sharing manner through one constant current driving module 30 in a complementary manner, so as to realize dimming and color-mixing functions with fewer components.

As shown in fig. 3, which is a detailed structural schematic diagram of an LED lighting device according to a specific embodiment of the present invention, the LED lighting device includes an LED light emitting assembly, a single chip module, a constant current driving module, and an MOS tube assembly, wherein the LED light emitting assembly includes a first LED light emitting unit and a second LED light emitting unit, the first LED light emitting unit includes RGB color lamp strings D2-D19, and the second LED light emitting unit includes high color temperature white lamp string D23-D39 (cold white light) and low color temperature white lamp string D43-D59 (warm white light); the singlechip module adopts a singlechip U2, and can output WHITE (WHITE light/color light switching signal), GCPWM (green light/cold WHITE light PWM driving signal), BWPWM (blue light/warm WHITE light PWM driving signal), RPWM (red light PWM driving signal), DIMPWM (brightness adjustment PWM driving signal), Vin (input voltage), GND (ground) and KEY1 (switch interface); the constant current driving module comprises a driving boosting constant current chip U1, an input capacitor C1, an energy storage inductor L1, a rectifying Schottky diode D1, an output capacitor C2 and a current sampling resistor R6; the MOS tube component comprises a first MOS tube unit, a second MOS tube unit and a third MOS tube unit, wherein the first MOS tube unit comprises switch MOS tubes Q1, Q2, Q3, Q5 and Q6, the second MOS tube unit comprises switch MOS tubes Q4 and Q7, and the third MOS tube unit comprises a switch MOS tube Q8. Each switch MOS tube in the first MOS tube unit corresponds to each group of lamp strings respectively and is connected between the single chip microcomputer module and the constant current driving module and each group of lamp strings, each switch MOS tube in the second MOS tube unit corresponds to each LED light-emitting unit respectively and is connected between the first MOS tube unit and the constant current driving module, the switch MOS tube in the third MOS tube unit is connected between each switch MOS tube in the second MOS tube unit and the ground, so that the switch of each switch MOS tube in the second MOS tube unit corresponding to the two LED light-emitting units is guided, the two switch units can not be switched on simultaneously, and when one switch unit is switched on, the other switch unit is necessarily switched off.

The EN/PWM interface of the driving boosting constant-current chip U1 is connected with a DIMPWM interface of the singlechip U2 to receive a brightness adjusting signal (namely a power adjusting signal) of the singlechip U2, the FB interface is connected with a current sampling resistor R6 and then grounded, the LX interface is connected with a rectifying Schottky diode D1 and an output capacitor C2 and then grounded, the GND interface is grounded, the IN interface is connected with a Vin interface (an input voltage interface) of the singlechip U2 and then connected with an input capacitor C1 and then grounded, and an energy storage inductor L1 is further connected between the IN interface and the LX interface. First ends of the RGB colored lamp strings D2-D19, the high color temperature white lamp bead lamp strings D23-D39 and the low color temperature white lamp bead lamp strings D43-D59 are connected between a rectified Schottky diode D1 and an output capacitor C2, second ends of the red LED lamp strings, the green LED lamp strings and the blue LED lamp strings in the RGB colored lamp strings D2-D19 are respectively connected with drains of a switch MOS tube Q1, a switch MOS tube Q2 and a switch MOS tube Q3, second ends of the high color temperature white lamp bead lamp strings D23-D39 are connected with a drain of a switch MOS tube Q5, and second ends of the low color temperature white lamp bead lamp strings D43-D59 are connected with a drain of a switch MOS tube Q6; the grid of the switch MOS tube Q1 is connected with an RPWM interface of the singlechip U2, the grid of the switch MOS tube Q2 is connected with a GCPWM interface of the singlechip U2, the grid of the switch MOS tube Q3 is connected with a BWPWM interface of the singlechip U2, the grid of the switch MOS tube Q5 is connected with a GCPWM interface of the singlechip U2, and the grid of the switch MOS tube Q6 is connected with a BWPWM interface of the singlechip U2. In the embodiment, gates of the switching MOS transistor Q2 connected to the green LED light string and the switching MOS transistor Q5 connected to the high color temperature white light bead light strings D23-D39 are simultaneously connected to a GCPWM interface on the single chip microcomputer U2, gates of the switching MOS transistor Q3 connected to the blue LED light string and the switching MOS transistor Q6 connected to the low color temperature white light bead light strings D43-D59 are simultaneously connected to a GCPWM interface of the single chip microcomputer U2, so that the number of interfaces of the single chip microcomputer U2 can be reduced, that is, the driving interfaces of the single chip microcomputer U2 can be shared among the LED light strings in different LED light emitting units, and the switching MOS transistors can not be shared in other embodiments and selected according to actual needs.

The sources of the switching MOS tubes Q1, Q2 and Q3 are all connected to the drain of the switching MOS tube Q4, and the sources of the switching MOS tubes Q5 and Q6 are all connected to the drain of the switching MOS tube Q7; the source electrodes of the switch MOS tubes Q4 and Q7 are connected between an FB interface of the driving boosting constant-current chip U1 and the current sampling resistor R6, the grid electrode of the switch MOS tube Q4 is connected between the drain electrode of the switch MOS tube Q8 and the pull-up resistor R12, the grid electrodes of the switch MOS tubes Q7 and Q8 are simultaneously connected to a WHITE interface of the singlechip U2, the source electrode of the switch MOS tube Q8 is connected to the ground, and the other end of the pull-up resistor R12 is connected with a Vin interface of the singlechip U2. In addition, the GND interface on the singlechip U2 is grounded, and the KEY1 interface is connected with the human-machine interface input switch S1 so as to carry out total input control on the singlechip U2 through the human-machine interface input switch S1.

The working principle of the LED lighting device of the present embodiment is as follows: if WHITE light is to be output, the signal of the WHITE interface of the single chip microcomputer U2 is high level effective, the switch MOS tube Q4 is closed, the switch MOS tubes Q7 and Q8 are opened, at the moment, the output signals of the GCPWM interface and the BWPWM interface are complementary PWM signals, for example, two sets of mutually complementary PWM signals shown in FIG. 2 are provided, the high color temperature WHITE light bead lamp strings D23-D39 and the low color temperature WHITE light bead lamp strings D43-D59 are driven to work in a time-sharing manner, and meanwhile, the DIWM MPinterface of the single chip microcomputer U2 outputs brightness adjusting signals for adjusting the brightness of the two sets of lamp strings; if the color light is to be output, the signal of the WHITE interface of the singlechip U2 is effective at low level, the switch MOS tube Q7 and Q8 are closed, the switch MOS tube Q4 is opened, and PWM signals output by the RPWM interface, the GCPWM interface and the BWPWM interface are complementary in pairs to drive red light + green light, red light + blue light or green light + blue light to be output in a time-sharing manner; no matter which lamp string works, the final current passes through the current sampling resistor R6, so that the driving and boosting constant-current chip U1 outputs corresponding driving voltage according to the working voltage of different lamp strings to achieve constant-current output.

In this embodiment, the switching MOS transistors Q1, Q2, Q3, Q5, and Q6 respectively correspond to connection control of each group of LED strings, the switching MOS transistors Q4 and Q7 respectively correspond to total connection control of each LED lighting unit, and the switching MOS transistor Q8 is used for guiding two LED lighting units, so that only one LED lighting unit can operate at the same time.

The specific embodiment is a scheme of white light adjustable color temperature and color RGB, wherein 5 paths of LED lamp strings are simultaneously controlled through one constant current driving module, namely the 5 paths of LED lamp strings can be well controlled only by one driving boosting constant current chip, and compared with the traditional scheme that each path of LED lamp string needs one path of constant current driving, the requirement of the chip is greatly reduced, so that the cost is greatly reduced; and only one group of lamp strings can work at the same time based on the control circuit, thereby avoiding the risk of overload of the system; in addition, the singlechip module directly outputs a brightness adjusting signal (namely a power adjusting signal) to the constant current driving module to directly control the power of the lamp string which correspondingly works, so that the power can be conveniently controlled.

As shown in fig. 4, in the scheme of adjusting color temperature of white light according to the second embodiment of the present invention, compared with the circuit structure shown in fig. 3, RGB color lamp strings D2 to D19, corresponding switching MOS transistors Q1, Q2, Q3, Q4, Q7, Q8, and pull-up resistor R12 are removed, and only the switching MOS transistors Q5 and Q6 connected to two lamp strings are respectively connected to the driving interface corresponding to the single chip U2.

In this embodiment, the color temperature of the white light needs to be adjusted, for example, the high color temperature white light bead light strings D23-D39 are 6000K, the low color temperature white light bead light strings D43-D59 are 3000K, and the total power of the system is 100W. The specific working principle is as follows: (1) if white light output with color temperatures of 50W and 3000K is required, the dimming PWM positive cycle pulse ratio output to the driving boosting constant current chip U1 through the DIMPWM interface of the single chip microcomputer U2 is set to be 50%, the switch MOS tube Q6 of the low color temperature white light bead lamp strings D43-D59 is controlled to be turned on, and the switch MOS tube Q5 of the high color temperature white light bead lamp strings D23-D39 is controlled to be turned off, so that the required white light with color temperatures of 50W and 3000K can be obtained. (2) If white light output with color temperatures of 60W and 4000K is required, the dimming PWM positive cycle pulse ratio output to the driving boosting constant current chip U1 through the DIMPWM interface of the single chip microcomputer U2 is set to 60%, and 3000K can be calculated according to (4000K-3000K)/(6000K-3000K) ═ 1/3: 6000K is 2: 1, at this time, complementary signals are adopted to control the on-off of the switch MOS tubes of the low-color-temperature white-light bead lamp strings D43-D59 (3000K color temperature lamp strings) and the high-color-temperature white-light bead lamp strings D23-D39 (6000K color temperature lamp strings), the switch MOS tube Q6 of the low-color-temperature white-light bead lamp strings D43-D59 (3000K color temperature lamp strings) is controlled to be switched on in the front 2/3 time of each period, the switch MOS tube Q5 of the high-color-temperature white-light bead lamp strings D23-D39 (6000K color temperature lamp strings) is controlled to be switched off, the switch MOS tube Q6 of the low-color-temperature white-light bead lamp strings D43-D59 (3000K color temperature lamp strings) is controlled to be switched off in the following 1/3 time, and the switch MOS tube Q5 of the color temperature of the high-color-temperature white-light bead lamp strings D23-D39 (6000K color temperature lamp strings) is controlled to be switched on. Because the time of one cycle is very short, it can be designed to be above 4KHZ, for example; thus, the color temperature 4000K after the mixed light can be seen by human eyes or a camera. Because only one string is in operation at any time and the total power is controlled by a single constant current drive, the overload problem is avoided. The white light with any color temperature of 3000K-6000K and any output power can be obtained by the method, and the requirement of adjustable color temperature and adjustable power is met.

As shown in fig. 5, in the scheme of color light RGB according to the third embodiment of the present invention, compared with the circuit structure shown in fig. 3, the high color temperature white light bead lamp strings D23-D39, the low color temperature white light bead lamp strings D43-D59, the corresponding switching MOS transistors Q4, Q5, Q6, Q7, and Q8, and the pull-up resistor R12 are removed, and the switching MOS transistors Q1, Q2, and Q3 connected to the three lamp strings are only needed to be connected to the driving interface corresponding to the single chip microcomputer U2. The working principle of the color RGB is the same as that of the above white light adjustable color temperature scheme, and the light with different phase saturation degrees of 100 can be realized by combining two by two, that is, the light with different colors can be realized by different complementary proportions of red + green, red + blue, and green + blue, and the details are not repeated here.

Based on the above embodiments, it can be seen that the light and color adjusting control circuit provided by the present invention can be used for simultaneously controlling two sets of light strings of white light with adjustable color temperature, three sets of light strings of color RGB, five sets of light strings of white light with adjustable color temperature and color RGB, and other multiple sets of light strings in any requirement. In a further scheme, three or more groups of light strings can be correspondingly controlled by a single chip microcomputer which realizes three or more groups of mutually complementary PWM signals to realize alternate lighting, and the light mixing effect that three or more than three light strings are lighted is still seen, so that the problems of high cost, difficult power control and system overload risk in the prior art are solved.

The background of the invention may contain background information related to the problem or environment of the present invention rather than the prior art described by others. Accordingly, the inclusion in the background section is not an admission of prior art by the applicant.

The foregoing is a more detailed description of the invention in connection with specific/preferred embodiments and is not intended to limit the practice of the invention to those descriptions. It will be apparent to those skilled in the art that various substitutions and modifications can be made to the described embodiments without departing from the spirit of the invention, and these substitutions and modifications should be considered to fall within the scope of the invention. In the description herein, references to the description of the term "one embodiment," "some embodiments," "preferred embodiments," "an example," "a specific example," or "some examples" or the like are intended to mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction. Although embodiments of the present invention and their advantages have been described in detail, it should be understood that various changes, substitutions and alterations can be made herein without departing from the scope of the invention as defined by the appended claims.

Claims (9)

1. A light and color adjusting control circuit is used for controlling brightness change and/or color temperature change of an LED light-emitting component, and is characterized by comprising a single chip microcomputer module, a constant current driving module and an MOS tube component, wherein the MOS tube component comprises at least two MOS tubes, at least part of the at least two MOS tubes are respectively connected with a driving interface of the single chip microcomputer module to respectively receive PWM signals of the single chip microcomputer module so as to respectively control the on-off of the MOS tubes through the PWM signals, at least two groups of PWM signals in the PWM signals respectively received by the MOS tubes respectively connected with the driving interface of the single chip microcomputer module are mutually complementary in any preset period, the constant current driving module is connected with a brightness adjusting interface of the single chip microcomputer module so as to receive the brightness adjusting signals of the single chip microcomputer module, and the LED light-emitting component comprises at least two groups of LED lamp strings, the first ends of the at least two groups of LED lamp strings are connected with the constant current driving module, and the second ends of the at least two groups of LED lamp strings are respectively connected with the MOS tubes connected with the driving interfaces of the singlechip module.

2. The dimming and color-mixing control circuit according to claim 1, wherein the MOS tube assembly comprises a first MOS tube unit, the first MOS tube unit comprises a plurality of first MOS tubes, the number of the first MOS tubes corresponds to the number of the LED light strings one to one, wherein drain electrodes of the plurality of first MOS tubes are respectively connected to the second ends of the corresponding LED light strings, gate electrodes of the plurality of first MOS tubes are respectively connected to the driving interfaces of the single chip module, and source electrodes of the plurality of first MOS tubes are connected to the constant current driving module.

3. The dimming and color-mixing control circuit according to claim 1 or 2, wherein the LED light emitting assembly comprises a red LED light string, a green LED light string and a blue LED light string.

4. The dimming and color-mixing control circuit according to claim 1 or 2, wherein the LED light emitting assembly comprises a cold white LED string and a warm white LED string.

5. The dimming and color-mixing control circuit according to claim 1, wherein the LED lighting assembly comprises a plurality of LED lighting units, each of the LED lighting units comprises at least two groups of LED light strings, respectively, and the MOS tube assembly comprises a first MOS tube unit and a second MOS tube unit;

the first MOS tube unit comprises a plurality of first MOS tubes, the second MOS tube unit comprises a plurality of second MOS tubes, the number of the first MOS tubes corresponds to that of the LED lamp strings one by one, and the number of the second MOS tubes corresponds to that of the LED light-emitting units one by one;

the drain electrodes of the first MOS tubes are respectively connected to the second ends of the corresponding LED lamp strings, the grid electrodes are respectively connected to the driving interfaces of the singlechip module, the source electrodes are respectively connected with the drain electrodes of the second MOS tubes, the source electrodes of the second MOS tubes are respectively connected with the constant current driving module, and the grid electrodes of the second MOS tubes are respectively connected to the control interfaces of the singlechip module.

6. The dimming and toning control circuit according to claim 1, wherein the LED lighting assembly comprises a first LED lighting unit and a second LED lighting unit, the first LED lighting unit and the second LED lighting unit respectively comprise at least two groups of LED light strings, and the MOS tube assembly comprises a first MOS tube unit, a second MOS tube unit and a third MOS tube unit;

the first MOS tube unit comprises a plurality of first MOS tubes, the second MOS tube unit comprises a second MOS tube and a third MOS tube, the third MOS tube unit comprises a fourth MOS tube, and the number of the first MOS tubes corresponds to the number of the LED lamp strings one by one;

the drain electrodes of the first MOS tubes are respectively connected to the second ends of the corresponding LED lamp strings, the grid electrodes are respectively connected to the driving interfaces of the singlechip module, the source electrodes of the first MOS tubes correspondingly connected with the first LED light-emitting units are respectively connected with the drain electrodes of the second MOS tubes, the source electrodes of the first MOS tubes correspondingly connected with the second LED light-emitting units are respectively connected with the drain electrodes of the third MOS tubes, the source electrodes of the second MOS tubes and the third MOS tubes are respectively connected with the constant current driving module, the grid electrodes of the second MOS tubes and the drain electrodes of the fourth MOS tubes are respectively connected with the power interface of the singlechip module, the grid electrodes of the third MOS tubes and the fourth MOS tubes are respectively connected with the same control interface of the singlechip module, and the source electrode of the fourth MOS tube is grounded.

7. The dimming and color-mixing control circuit according to claim 6, wherein the first LED light-emitting unit comprises a red LED light string, a green LED light string and a blue LED light string, and the second LED light-emitting unit comprises a cool white LED light string and a warm white LED light string.

8. The dimming and color-adjusting control circuit according to claim 6, wherein the gate of the second MOS transistor and the drain of the fourth MOS transistor are connected to the power interface of the single chip module through a pull-up resistor.

9. An LED lighting device, comprising an LED lighting assembly and the dimming and toning control circuit as recited in any one of claims 1 to 8.

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