CN116761313A - Lighting control circuit compatible with dimming and timing - Google Patents

Lighting control circuit compatible with dimming and timing Download PDF

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Publication number
CN116761313A
CN116761313A CN202310570676.3A CN202310570676A CN116761313A CN 116761313 A CN116761313 A CN 116761313A CN 202310570676 A CN202310570676 A CN 202310570676A CN 116761313 A CN116761313 A CN 116761313A
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CN
China
Prior art keywords
micro
resistor
control chip
control
pin
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CN202310570676.3A
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Chinese (zh)
Inventor
严华锋
李小龙
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Suzhou Maipu Biotechnology Co ltd
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Suzhou Maipu Biotechnology Co ltd
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Priority to CN202310570676.3A priority Critical patent/CN116761313A/en
Publication of CN116761313A publication Critical patent/CN116761313A/en
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    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B47/00—Circuit arrangements for operating light sources in general, i.e. where the type of light source is not relevant
    • H05B47/10—Controlling the light source
    • H05B47/16—Controlling the light source by timing means
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B47/00—Circuit arrangements for operating light sources in general, i.e. where the type of light source is not relevant
    • H05B47/10—Controlling the light source
    • H05B47/155—Coordinated control of two or more light sources
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B47/00—Circuit arrangements for operating light sources in general, i.e. where the type of light source is not relevant
    • H05B47/10—Controlling the light source
    • H05B47/165—Controlling the light source following a pre-assigned programmed sequence; Logic control [LC]

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  • Discharge-Lamp Control Circuits And Pulse- Feed Circuits (AREA)

Abstract

The invention relates to the technical field of lighting circuits, in particular to a lighting control circuit compatible with dimming and timing, which comprises: the second pin of the micro control chip is used for inputting a first adjusting signal; the third pin of the micro control chip is connected with the grid electrode of the first MOS tube, and the micro control chip controls the first MOS tube to be turned on or turned off according to a first adjustment signal input currently so as to control the working time of the dimming driving device; the fourth pin of the micro control chip is connected with a second input signal; the fifth pin of the micro-control chip is connected with the grid electrode of the second MOS tube, and the micro-control chip controls the second MOS tube to be turned on or turned off according to the second adjusting signal input currently so as to control the output voltage of the dimming driving device. The beneficial effects are that: the timing adjustment and the brightness adjustment of the lamp are realized simultaneously by changing the adjusting signal input to the micro-control chip; and realizing the linkage group control function of a plurality of dimming driving devices through the control terminal.

Description

Lighting control circuit compatible with dimming and timing
Technical Field
The invention relates to the technical field of lighting circuits, in particular to a lighting control circuit compatible with dimming and timing.
Background
The dimming driving device is used for providing constant current driving, and the device for changing the brightness of the lamp is realized by changing the output current or the output voltage of the lighting power supply (including changing the output port voltage of the dimming driving device). In the prior art, dimming drivers typically achieve dimming of a luminaire by providing a resistor or dimming controller (pulse width modulation PWM or digital addressable lighting interface DALI, etc.) at the dimming output port. However, in some special lighting application scenarios, such as the cultivation industry and energy-saving lighting, timing and dimming are needed to be realized on the lamp at the same time, and the dimming driving device in the prior art cannot simultaneously control the working time and brightness of the lamp at the same time; in addition, the linkage function cannot be realized.
Disclosure of Invention
In view of the foregoing problems in the prior art, a lighting control circuit compatible with dimming and timing is now provided.
The specific technical scheme is as follows:
the invention includes a lighting control circuit compatible with dimming and timing, including a dimming driving device, the dimming driving device includes a first driving port, a second driving port and a third driving port, the lighting control circuit includes:
the first control branch is connected between the first driving port and the grounding end and is used for selectively forming a plurality of different first adjustment signals;
a second control branch connected between the first driving port and the ground terminal for selectively forming a plurality of different second adjustment signals;
a micro-control chip, the micro-control chip comprising a plurality of pins:
the first pin of the micro control chip is connected with the first driving port and is used for supplying power to the micro control chip;
the second pin of the micro control chip is connected with the first control branch and is used for inputting the first adjusting signal to the micro control chip;
the third pin of the micro-control chip is connected with a grid electrode of a first MOS tube, the drain electrode of the first MOS tube is connected with the second driving port, the source electrode of the first MOS tube is connected with the third driving port, and the micro-control chip controls the first MOS tube to be turned on or off according to the first adjusting signal input currently so as to control the working time of the dimming driving device;
the fourth pin of the micro control chip is connected with the second control branch and is used for inputting the second adjusting signal to the micro control chip;
the fifth pin of the micro-control chip is connected with a grid electrode of a second MOS tube, the drain electrode of the second MOS tube is connected with the second driving port, the source electrode of the second MOS tube is connected with the third driving port, and the micro-control chip controls the second MOS tube to be turned on or off according to the second adjusting signal input currently so as to control the output voltage of the dimming driving device.
Preferably, the lighting control circuit further comprises a control terminal, wherein the output end of the control terminal is respectively connected with a sixth pin, a seventh pin and an eighth pin of the micro-control chip and is used for inputting a third control signal to the micro-control chip, and the micro-control chip controls the on or off of the first MOS tube and/or the second MOS tube according to the third control signal.
Preferably, a ninth pin of the micro control chip is connected to the second driving port, and is used for detecting the output voltage of the second driving port.
Preferably, the lighting control circuit further includes a first voltage dividing unit, and the first voltage dividing unit includes:
a first resistor and a second resistor connected in series between the first driving port and the ground terminal;
the first pin of the micro control chip is connected with the first driving port through the first pivot.
Preferably, the lighting control circuit further includes a second voltage division unit, and the second voltage division unit includes:
the third resistor and the fourth resistor are connected in series between the power input end of the dimming driving device and the second driving port;
the second fulcrum is arranged between the third resistor and the fourth resistor, and the drain electrode of the first MOS tube is connected with the second driving port through the second fulcrum and the fourth resistor.
Preferably, the first control branch includes:
one end of the first selection switch is connected with the first driving port through a fifth resistor, the other end of the first selection switch is selectively connected with a sixth resistor, a seventh resistor and an eighth resistor, and the resistance values of the sixth resistor, the seventh resistor and the eighth resistor are different from each other.
Preferably, the second control branch includes:
one end of the second selection switch is connected with the first driving port through a ninth resistor, the other end of the second selection switch is selectively connected with a tenth resistor, an eleventh resistor and a twelfth resistor, and the resistance values of the tenth resistor, the eleventh resistor and the twelfth resistor are different from each other.
Preferably, the lighting control circuit further includes a first capacitor connected between the first pin of the micro control chip and the ground terminal.
Preferably, the lighting control circuit further includes a second capacitor connected between the second driving port and the ground terminal.
Preferably, the micro control chip further comprises a clock controller, and the clock controller is arranged in the micro control chip and used for timing.
The technical scheme of the invention has the following advantages or beneficial effects: providing a lighting control circuit compatible with dimming and timing, and adjusting an output signal of a micro control chip by changing an adjusting signal input to the micro control chip so as to control the starting and stopping time of a dimming driving device to realize timing lighting; meanwhile, the dimming driving device is controlled to adjust the brightness of the lamp according to the output voltage of the micro-control chip; in addition, the control terminal can simultaneously send external control signals to the micro-control chips of the plurality of dimming driving devices, so that the linkage group control function is realized.
Drawings
Embodiments of the present invention will now be described more fully with reference to the accompanying drawings. The drawings, however, are for illustration and description only and are not intended as a definition of the limits of the invention.
Fig. 1 is a block diagram of an illumination control circuit in an embodiment of the present invention.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
It should be noted that, without conflict, the embodiments of the present invention and features of the embodiments may be combined with each other.
The invention is further described below with reference to the drawings and specific examples, which are not intended to be limiting.
The invention includes a lighting control circuit compatible with dimming and timing, comprising a dimming driving device 1, wherein the dimming driving device 1 comprises a first driving port 11, a second driving port 12 and a third driving port 13, as shown in fig. 1, the lighting control circuit comprises:
a first control branch connected between the first driving port 11 and the ground GND for selectively forming a plurality of different first adjustment signals;
a second control branch connected between the first driving port 11 and the ground GND for selectively forming a plurality of second adjustment signals;
a micro control chip MCU, the micro control chip MCU includes a plurality of pins:
the first pin S1 of the micro control chip is connected with the first driving port 11 and is used for supplying power to the micro control chip;
the second pin S2 of the micro control chip is connected with the first control branch and is used for inputting a first adjusting signal to the micro control chip;
the third pin S3 of the micro-control chip is connected with the grid electrode of a first MOS tube Q1, the drain electrode of the first MOS tube Q1 is connected with the second driving port 12, the source electrode of the first MOS tube is connected with the third driving port 13, and the micro-control chip controls the first MOS tube Q1 to be turned on or off according to a first adjusting signal input currently so as to control the working time of the dimming driving device 1;
the fourth pin S4 of the micro control chip is connected with the second control branch and is used for inputting a second adjusting signal to the micro control chip;
the fifth pin S5 of the micro-control chip is connected with a grid electrode of a second MOS tube Q2, a drain electrode of the second MOS tube Q2 is connected with a second driving port 12, a source electrode of the second MOS tube is connected with a third driving port 13, and the micro-control chip controls the second MOS tube Q2 to be turned on or off according to a second adjusting signal input currently so as to control the output voltage of the dimming driving device 1.
Specifically, in this embodiment, the first control branch selectively forms a plurality of different voltage signals, that is, a first adjustment signal, and the MCU adjusts the output signal on the third pin S3 according to the first adjustment signal currently input by the S2 pin, and controls the on or off of the first MOS transistor Q1 with the output signal of the S3 pin, so as to control the operating time of the dimming driving device 1; meanwhile, the micro control chip MCU adjusts the output signal on the fifth pin S5 according to the second adjusting signal currently input by the S4 pin so as to control the output voltage of the dimming driving device 1, and the brightness of the lamp is adjusted.
Through the above technical scheme, the illumination control circuit in this embodiment may be used for a plant illumination lamp, for example, a certain plant needs to be irradiated with light with illumination intensity a for 8 hours (h) every day in the cultivation process, and then irradiated with light with illumination intensity B for 2 hours. In this embodiment, the first adjustment signal and the second adjustment signal input to the MCU may be changed by the first control branch or the second control branch, the MCU controls the working time according to different first adjustment signals, for example, the first adjustment signal is a voltage signal of 5V, if the control program sets the control time corresponding to the voltage signal of 5V to 8h, after the driving port of the dimming driving device continuously outputs the voltage of 5V for 8h, the MCU sends an output signal with a high duty ratio to Q1 or Q2, Q1 or Q2 is turned on, the second driving port 12 and the third driving port 13 are shorted, at this time, the lamp power supply has no voltage input, the lamp is turned off, and the timing illumination is implemented.
Specifically, the dimming driving device 1 in the present embodiment is preferably a dimming driver connected to a lamp. The port voltage of the first driving port 11 may be an Aux or program port voltage, but the port voltage must be greater than the supply voltage of the micro control chip MCU. The port voltage of the first drive port 11 is preferably 12V, and the port voltage of the second drive port 12 is preferably 10V. The second drive port 12 and the third drive port 13 are also connected to the positive and negative poles of the dimming port of the dimming drive device 1, respectively.
Specifically, the first pin S1 of the micro control chip MCU is a power supply pin, and is configured to introduce the port voltage output by the first driving port 11 into the micro control chip MCU, so as to realize power supply to the micro control chip MCU; the second pin S2 of the MCU is a first input pin, the S4 is a second input pin, and the S3 and the S5 are controlled to output signals with different duty ratios according to different voltage signals input by the S2 and the S4 so as to control the on or off of the Q1 and the Q2, thereby realizing the simultaneous adjustment of the working time and the brightness of the lamp.
Specifically, when the voltage on the second driving port 12 is less than or equal to the first voltage threshold of the dimming driving device 1, the S3 pin sends a high level to the first MOS transistor Q1 or the S5 pin sends a high level to the second MOS transistor Q2, so that the first MOS transistor Q1 is in a conducting state, and at this time, the driving ports 12 and 13 of the dimming driving device 1 are equivalent to a short circuit, so that the lamp is in a minimum brightness state or the dimming driver is in a minimum current output state; when the voltage on the second driving port 12 is lower than a second voltage threshold or the control time corresponding to different voltage signals input to the micro control chip MCU is reached, the source electrode and the drain electrode of the second MOS tube Q2 are conducted, the driving ports 12 and 13 are short-circuited, and the lamp power supply is extinguished; when the voltage on the second driving port 12 is higher than a third voltage threshold, the driving ports 12 and 13 of the dimming driving device 1 are normally driven, and the lamp is lighted. Wherein the second voltage threshold is preferably 0.6V and the third voltage threshold is preferably 0.8V.
As a preferred embodiment, the micro control chip MCU has a clock controller built in for timing. In the micro control chip MCU, a control program is preset, and when the control program judges that the lamp reaches the control time with the working time of the current control voltage, the MCU generates an output signal with a high duty ratio to the MOS transistor Q1 or Q2, so that the output voltage on the second driving port 12 is lower than the first voltage threshold of the dimming driving device 1, and at this time, the dimming driving device 1 cannot drive the lamp power supply, so that the lamp power supply is turned off, and the timing illumination is realized. For example, the control time is 24h, and when the operating time of the dimming driving device reaches 24h, the MCU control program generates an output signal with a high duty ratio to Q1 or Q2, and the dimming driving device 1 cannot drive the lamp power supply, so that the lamp power supply is turned off. In another embodiment, the control program may also output a short-time switching output signal, for example, 1 minute on and 1 minute off, and when the control time reaches 1 minute, the on-off state of the lamp power supply is switched. If the dimming driving device 1 has the function of dimming to be turned off at the lowest, when the control time corresponding to the input voltage is reached, the control program generates an output signal and sends the output signal to the gate of the first MOS transistor Q1, at this time, the first MOS transistor Q1 is turned on, the second driving port 12 and the third output port 13 are in a short-circuit state, and at this time, the lamp power supply has no voltage input, so that the lamp is turned off, and the timing illumination is realized.
In a preferred embodiment, as shown in fig. 1, the lighting control circuit further includes a control terminal 2, and the output end of the control terminal 2 is respectively connected to a sixth pin S6, a seventh pin S7, and an eighth pin S8 of the micro control chip, and is configured to input a third control signal to the micro control chip MCU, where the micro control chip MCU controls on or off of the first MOS transistor Q1 and/or the second MOS transistor Q2 according to the third control signal.
Specifically, in this embodiment, the micro control chip MCU further includes a sixth pin S6, a seventh pin S7, and an eighth pin S8, where the sixth pin S6, the seventh pin S7, and the eighth pin S8 are all connected to an external control terminal, and the micro control chip MCU may further adjust an output signal on the third pin S3 and an output voltage on the fifth pin S5 of the MCU according to a control instruction (Daisy chain) sent by the control terminal to the control terminal, so as to implement timing and brightness adjustment functions for the lamp. It should be noted that, the control terminal 2 may be a computer, a mobile phone, a tablet computer or other devices capable of sending control instructions. When the dimming driving devices 1 need to perform timing illumination at the same time, the same control instruction can be sent to the S6 pin, the S7 pin and the S8 pin of the different micro control chips MCU through the control terminal 2, so that linkage control of the dimming driving devices 1 is realized, and a plurality of lamp power supplies are controlled to perform brightness adjustment and timing adjustment simultaneously.
In a preferred embodiment, as shown in fig. 1, a ninth pin S9 of the micro control chip MCU is connected to the second driving port 12 for detecting the output voltage of the second driving port 12.
Specifically, after the MCU is powered on, if the MCU outputs an output signal with the maximum duty ratio through the third pin S3 of the MCU or detects that the voltage on the second driving port 12 of the dimming driving device 1 is less than or equal to the first voltage threshold of the dimming driving device 1 through the ninth pin S9, the MCU sends a high level to the first MOS transistor Q1 through the S3 pin or sends a high level to the second MOS transistor Q2 through the S5 pin, so that the MCU is in a conductive state, and at this time, the driving port of the dimming driving device 1 is equivalent to or close to a short circuit, so that the lamp is in a minimum brightness or the dimming driver is in a minimum current output state; if the dimming driving device has the function of lowest dimming to extinction, the lamp is in an extinction state. The first voltage threshold is preferably 1V, but may be set to a lower voltage.
Further, after the MCU is powered on, if the S3 pin of the MCU outputs an output signal that is not the maximum duty cycle, when the S9 pin detects that the voltage on the second driving port 12 of the dimming driving device 1 is greater than or equal to the first voltage threshold of the dimming driving device 1, the fifth pin S5 sends a low level to the second MOS transistor Q2, so that the second MOS transistor Q2 is in an off state, and at this time, the second driving port 12 and the third driving port 13 of the dimming driving device 1 make the output current in a linear change output state.
In a preferred embodiment, as shown in fig. 1, the lighting control circuit further includes a first voltage dividing unit, where the first voltage dividing unit includes:
a first resistor R1 and a second resistor R2 connected in series between the first driving port 11 and the ground GND;
the first pivot F1 is disposed between the first resistor R1 and the second resistor R2, and the first pin of the micro control chip MCU is connected to the first driving port 11 through the first pivot F1.
Specifically, in this embodiment, the first voltage dividing unit is a voltage dividing circuit formed by connecting the first resistor R1 and the second resistor R2 in series, and the voltage input to the first pin S1 of the MCU is divided by setting the first voltage dividing unit, so as to avoid damage to the S1 pin caused by excessive input voltage of the S1 pin.
In a preferred embodiment, as shown in fig. 1, the lighting control circuit further includes a second voltage division unit, where the second voltage division unit includes:
a third resistor R3 and a fourth resistor R4 connected in series between the power input VCC of the dimming driving device 1 and the second driving port 12;
the second supporting point F2 is disposed between the third resistor R3 and the fourth resistor R4, and the drain electrode of the first MOS transistor Q1 is connected to the second driving port 12 through the second supporting point F2 and the fourth resistor R4.
Specifically, the second voltage division unit is formed by connecting a third resistor R3 and a fourth resistor R4 in series, the R3 and the R4 play a role in voltage division, and the situation that the MCU directly outputs excessive current to the grid electrode of the first MOS tube Q1 to damage the first MOS tube Q1 is avoided, so that the current-limiting protection function is played.
In a preferred embodiment, as shown in fig. 1, the first control branch comprises:
one end of the first selection switch SW1 is connected to the first driving port 11 through a fifth resistor R5, and the other end of the first selection switch SW1 is selectively connected to a sixth resistor R6, a seventh resistor R7 and an eighth resistor R8, where the resistance values of the sixth resistor R6, the seventh resistor R7 and the eighth resistor R8 are different from each other.
Specifically, in this embodiment, a selection switch is preferably used, where the first selection switch SW1 includes a plurality of nodes, and resistors with different resistance values are connected when the SW1 is connected to different nodes, so as to form different voltage dividing circuits, thereby generating different voltage signals. For example, when SW1 is connected to R6, the input of the S2 pin of the MCU is a voltage signal generated by dividing the voltage of R5 and R6; when SW1 is connected with R7, the S2 pin of the MCU inputs a voltage signal generated by dividing the voltage of R5 and R7; when SW1 is connected to R8, the S2 pin of the MCU inputs a voltage signal generated by dividing R5 and R8. Because the resistance values of R6, R7 and R8 are different, the formed voltage signals are also different, and the MCU outputs a corresponding duty ratio according to the different voltage signals to control the on time of the first MOS tube Q1, so that the working time of the dimming driving device is controlled.
It should be noted that, the selection switch is only a preferred embodiment of the present invention, and a dial switch or a sliding rheostat may be used to adjust the voltage signal generated by the second control branch through the sliding rheostat, so as to realize stepless dimming for 0-100 of the lamp power supply; or other devices capable of changing the resistance value of the resistor are used for changing the resistance value of the resistor connected in series with the fifth resistor R5, so that different voltage division signals, namely different first adjustment signals, are formed, and the voltage can be obtained through analog or digital signal processing and input to the MCU.
In a preferred embodiment, as shown in fig. 1, the second control branch comprises:
one end of the second selection switch SW2 is connected to the first driving port 11 through a ninth resistor R9, the other end of the second selection switch SW2 is selectively connected to a tenth resistor R10, an eleventh resistor R11 and a twelfth resistor R12, and the resistance values of the tenth resistor R10, the eleventh resistor R11 and the twelfth resistor R12 are different from each other.
Specifically, in this embodiment, a selection switch is preferably used, the second selection switch SW2 includes a plurality of nodes, and resistors with different resistance values are connected when the SW2 is connected to different nodes, so as to form different voltage dividing circuits, thereby generating different voltage signals. For example, when SW2 is connected to R10, the voltage signal generated by dividing R9 and R10 is input to the S4 pin of the MCU; when SW2 is connected to R11, the S2 pin of the MCU inputs a voltage signal generated by dividing the voltage of R9 and R11; when SW2 is connected to R12, the S2 pin of the MCU inputs a voltage signal generated by dividing R9 and R12. Because the resistance values of R10, R11 and R12 are different, the formed voltage signals are also different, and the MCU outputs a corresponding duty ratio according to the different voltage signals to control the on time of the second MOS tube Q2, so that the brightness of the dimming driving device is controlled.
It should be noted that, the selection switch adopted by the second control branch is only a preferred embodiment of the invention, and a dial switch or a slide rheostat can be used to adjust the voltage signal generated by the second control branch through the slide rheostat so as to realize stepless dimming of 0-100 of the lamp power supply; or other devices capable of changing the resistance value of the resistor to change the resistance value of the resistor connected in series with the ninth resistor R9 so as to form different voltage division signals, namely different second adjustment signals, and voltage can be obtained through analog or digital signal processing and input into the MCU.
In a preferred embodiment, as shown in fig. 1, the lighting control circuit further includes a first capacitor C1 connected between the first pin S1 of the micro-control chip MCU and the ground GND. The voltage output to the first pin S1 of the micro control chip MCU is rectified and filtered through the arrangement of the first capacitor C1, and stability of an input signal is guaranteed.
In a preferred embodiment, as shown in fig. 1, the lighting control circuit further includes a second capacitor C2 connected between the second driving port 12 and the ground GND. The output signal of the micro control chip MCU is a pulse width modulation signal PWM, and the PWM signal is rectified by the arrangement of the second capacitor C2, so that a stable direct-current voltage output signal is obtained and is output to the second driving port 12 and the third driving port 13, and the stability of the port voltages on the second driving port 12 and the third driving port 13 is ensured.
The embodiment of the invention has the beneficial effects that: providing a lighting control circuit compatible with dimming and timing, and adjusting an output signal of a micro control chip by changing an adjusting signal input to the micro control chip so as to control the starting and stopping time of a dimming driving device to realize timing lighting; meanwhile, the dimming driving device is controlled to adjust the brightness of the lamp according to the output voltage of the micro-control chip; in addition, the control terminal can simultaneously send external control signals to the micro-control chips of the plurality of dimming driving devices, so that the linkage group control function is realized.
The foregoing description is only illustrative of the preferred embodiments of the present invention and is not to be construed as limiting the scope of the invention, and it will be appreciated by those skilled in the art that equivalent substitutions and obvious variations may be made using the description and illustrations of the present invention, and are intended to be included within the scope of the present invention.

Claims (10)

1. A lighting control circuit compatible with dimming and timing, comprising a dimming driving device, the dimming driving device comprising a first driving port, a second driving port and a third driving port, the lighting control circuit comprising:
the first control branch is connected between the first driving port and the grounding end and is used for selectively forming a plurality of different first adjustment signals;
a second control branch connected between the first driving port and the ground terminal for selectively forming a plurality of different second adjustment signals;
a micro-control chip, the micro-control chip comprising a plurality of pins:
the first pin of the micro control chip is connected with the first driving port and is used for supplying power to the micro control chip;
the second pin of the micro control chip is connected with the first control branch and is used for inputting the first adjusting signal to the micro control chip;
the third pin of the micro-control chip is connected with a grid electrode of a first MOS tube, the drain electrode of the first MOS tube is connected with the second driving port, the source electrode of the first MOS tube is connected with the third driving port, and the micro-control chip controls the first MOS tube to be turned on or off according to the first adjusting signal input currently so as to control the working time of the dimming driving device;
the fourth pin of the micro control chip is connected with the second control branch and is used for inputting the second adjusting signal to the micro control chip;
the fifth pin of the micro-control chip is connected with a grid electrode of a second MOS tube, the drain electrode of the second MOS tube is connected with the second driving port, the source electrode of the second MOS tube is connected with the third driving port, and the micro-control chip controls the second MOS tube to be turned on or off according to the second adjusting signal input currently so as to control the output voltage of the dimming driving device.
2. The lighting control circuit according to claim 1, further comprising a control terminal, wherein an output end of the control terminal is respectively connected to a sixth pin, a seventh pin and an eighth pin of the micro control chip, and is configured to input a third control signal to the micro control chip, and the micro control chip controls on or off of the first MOS transistor and/or the second MOS transistor according to the third control signal.
3. The lighting control circuit of claim 1, wherein a ninth pin of the micro-control chip is connected to the second drive port for detecting an output voltage of the second drive port.
4. The lighting control circuit of claim 1, further comprising a first voltage dividing unit, the first voltage dividing unit comprising:
a first resistor and a second resistor connected in series between the first driving port and the ground terminal;
the first pin of the micro control chip is connected with the first driving port through the first pivot.
5. The lighting control circuit of claim 1, further comprising a second voltage divider unit, the second voltage divider unit comprising:
the third resistor and the fourth resistor are connected in series between the power input end of the dimming driving device and the second driving port;
the second fulcrum is arranged between the third resistor and the fourth resistor, and the drain electrode of the first MOS tube is connected with the second driving port through the second fulcrum and the fourth resistor.
6. A lighting control circuit as recited in claim 1, wherein said first control branch comprises:
one end of the first selection switch is connected with the first driving port through a fifth resistor, the other end of the first selection switch is selectively connected with a sixth resistor, a seventh resistor and an eighth resistor, and the resistance values of the sixth resistor, the seventh resistor and the eighth resistor are different from each other.
7. A lighting control circuit as recited in claim 1, wherein said second control branch comprises:
one end of the second selection switch is connected with the first driving port through a ninth resistor, the other end of the second selection switch is selectively connected with a tenth resistor, an eleventh resistor and a twelfth resistor, and the resistance values of the tenth resistor, the eleventh resistor and the twelfth resistor are different from each other.
8. The lighting control circuit of claim 1, further comprising a first capacitor connected between the first pin of the micro-control chip and ground.
9. The lighting control circuit of claim 1, further comprising a second capacitor coupled between the second drive port and ground.
10. A lighting control circuit as recited in claim 1, wherein said micro-control chip further comprises a clock controller disposed within said micro-control chip for timing.
CN202310570676.3A 2023-05-19 2023-05-19 Lighting control circuit compatible with dimming and timing Pending CN116761313A (en)

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CN202310570676.3A CN116761313A (en) 2023-05-19 2023-05-19 Lighting control circuit compatible with dimming and timing

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CN202310570676.3A CN116761313A (en) 2023-05-19 2023-05-19 Lighting control circuit compatible with dimming and timing

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CN116761313A true CN116761313A (en) 2023-09-15

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