CN214154897U - LED control circuit and lighting system - Google Patents
LED control circuit and lighting system Download PDFInfo
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- CN214154897U CN214154897U CN202022199562.7U CN202022199562U CN214154897U CN 214154897 U CN214154897 U CN 214154897U CN 202022199562 U CN202022199562 U CN 202022199562U CN 214154897 U CN214154897 U CN 214154897U
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Abstract
The utility model relates to the field of lighting technology, a LED control circuit and lighting system are provided. The LED control circuit comprises a power supply module, a light source module and a driving module which are arranged on the substrate; the power adjusting module comprises at least one adjusting switch, when the adjusting switch is in different switch states, the reference point voltages designated on the power adjusting circuit are different and are used for providing different reference voltages for the driving module, and the output power of the driving module is matched with the reference voltages, so that power adjustment is realized, and the brightness of lamplight is changed. The LED control circuit and the lighting system can realize multi-power adjustment of the DOB circuit, change the brightness of lamplight, have low cost and simple circuit structure, and can be suitable for various DOB lighting systems.
Description
Technical Field
The utility model belongs to the technical field of the illumination, especially, relate to a LED control circuit and lighting system.
Background
The DOB (Driver On Board) scheme is a driving method derived based On LED characteristics, and an LED light source and a power driving circuit are disposed On the same substrate, so that the DOB scheme has advantages of low cost and high efficiency, and is widely accepted in the market. In the field of illumination, the requirements for the brightness of lamp light are different due to different application occasions and application time.
The DOB power circuit in the prior art only has a single-power function, cannot adjust power, cannot change light brightness, is complex in circuit structure and high in cost, and cannot be applied to various DOB lighting systems.
SUMMERY OF THE UTILITY MODEL
In view of this, the embodiment of the utility model provides a LED control circuit and lighting system to solve among the prior art DOB power circuit only single power output, can not carry out power control, can not change light luminance, circuit structure is complicated, and is with high costs, can't be applicable to multiple DOB lighting system's problem.
The embodiment of the utility model provides a first aspect provides a LED control circuit, including power module, light source module and the drive module that sets up on the base plate, LED control circuit still includes the power regulation module;
the power regulation module comprises at least one regulation switch, and when the regulation switch is in different switch states, the voltages of specified voltage reference points on the power regulation module are different;
the driving module comprises a voltage detection pin and a power control pin, the voltage detection pin is connected with the voltage reference point, the power control pin is connected with the light source module, and the output power of the power control pin is matched with the voltage detected by the voltage detection pin.
Optionally, the power adjusting module includes a first adjusting switch, a first switching tube, a first resistor, and a second resistor;
the first end of the first resistor and the first end of the second resistor are both connected with a voltage detection pin of the driving module, the second end of the second resistor is connected with the input end of the first switch tube, and the second end of the first resistor and the output end of the first switch tube are both grounded;
when the first adjusting switch is in an off state, the first switching tube is switched off, the output end of the power adjusting module is a voltage reference point, and the voltage of the voltage reference point is the voltage at two ends of the first resistor; when the first adjusting switch is in a closed state, the first switch tube is closed, and the voltage reference point voltage is the voltage at two ends of the first resistor and the second resistor.
Optionally, the power regulating module further includes a second regulating switch, a second switching tube, and a third resistor;
the first end of the third resistor is connected with a voltage detection pin of the driving module, the second end of the third resistor is connected with the input end of the second switch tube, and the output end of the second switch tube is grounded;
when the second regulating switch is in a closed state, the second switch tube is closed, and the voltage reference point voltage is the voltage at two ends of the first resistor, the second resistor and the third resistor.
Optionally, the power adjustment module further includes a fourth resistor, a fifth resistor, a sixth resistor, and a seventh resistor;
the first ends of the fourth resistor and the fifth resistor are both connected with an external power supply, the second end of the fourth resistor is connected with the input end of the first regulating switch, and the second end of the fifth resistor is connected with the input end of the second regulating switch;
the output end of the first adjusting switch is connected with the first end of the sixth resistor and also connected with the control end of the first switching tube;
the output end of the second regulating switch is connected with the second end of the seventh resistor and also connected with the control end of the second switching tube;
and second ends of the sixth resistor and the seventh resistor are both grounded.
Optionally, the first switch tube and the second switch tube are enhancement NMOS tubes.
Optionally, the driving module is a silicon controlled dimming driving chip.
Optionally, the light source module includes an eighth resistor, a first capacitor, a first voltage regulator tube, a third switching tube, a second capacitor, and at least one LED;
the at least one LED is connected in series;
the eighth resistor is connected with the first capacitor in parallel and used for filtering voltage noise;
the first voltage-regulator tube, the third switching tube and the second capacitor are used for filtering current noise;
the cathode of the first voltage-stabilizing tube is connected with the input end of the third switching tube, the anode of the first voltage-stabilizing tube is connected with the control end of the third switching tube, the first end of the second capacitor is connected with the output end of the third switching tube and is connected with the anode of the at least one LED, and the second end of the second capacitor is connected with the control end of the third switching tube.
Optionally, the LED control circuit further includes a power module for receiving a mains supply input and supplying power to the light source module, the driving module, and the power adjusting module.
Optionally, the power supply module includes a first fuse, a first rectifier bridge, a first voltage dependent resistor, a ninth resistor, a tenth resistor, an eleventh resistor, a first diode, and a third capacitor;
the commercial power is connected with the input end of the first rectifier bridge through the first fuse, the first piezoresistor is connected to the output end of the first rectifier bridge in parallel, and the anode of the output end of the first rectifier bridge is sequentially connected with the ninth resistor, the first diode and the tenth resistor to supply power to the light source module;
the first end of the eleventh resistor is connected with the anode of the first diode, and the second end of the eleventh resistor is connected with the power supply end of the driving module;
the first end of the third capacitor is connected with the second end of the tenth resistor, and the second end of the third capacitor is grounded;
and the second end of the ninth resistor is connected with the anode of the first diode, and the cathode of the first diode is connected with the first end of the tenth resistor.
The embodiment of the utility model provides a second aspect provides a lighting system, include the embodiment of the utility model provides an arbitrary kind of LED control circuit in the first aspect.
The embodiment of the utility model provides a LED control circuit, including power module, light source module and the drive module that sets up on same base plate, characterized in that, LED control circuit still includes the power regulation module;
the power regulating module comprises at least one regulating switch, and when the regulating switch is in different switch states, the voltages of specified voltage reference points on the power regulating circuit are different;
the driving module comprises a voltage detection pin and a power control pin, the voltage detection pin is connected with the voltage reference point, the power control pin is connected with the light source module, and the output power of the power control pin is matched with the voltage detected by the voltage detection pin. The embodiment of the utility model provides a LED control circuit can carry out power control to the DOB circuit, and circuit structure is simple, and is with low costs, is applicable to multiple DOB lighting system.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for the embodiments or the prior art descriptions will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without inventive labor.
Fig. 1 is a schematic diagram of a structure of an LED control circuit according to an embodiment of the present invention;
fig. 2 is a schematic diagram of an LED control circuit according to an embodiment of the present invention.
Detailed Description
In the following description, for purposes of explanation and not limitation, specific details are set forth, such as particular system structures, techniques, etc. in order to provide a thorough understanding of the embodiments of the invention. It will be apparent, however, to one skilled in the art that the present invention may be practiced in other embodiments that depart from these specific details. In other instances, detailed descriptions of well-known systems, devices, circuits, and methods are omitted so as not to obscure the description of the present invention with unnecessary detail.
In order to explain the technical solution of the present invention, the following description is made by using specific examples.
Referring to fig. 1, an embodiment of the present invention provides an LED control circuit, which includes a power module 11, a light source module 12, and a driving module 13 disposed on a substrate, and further includes a power adjusting module 14;
the power adjusting module 14, the power module 11, the light source module 12 and the driving module 13 are arranged on the substrate;
the power regulating module 14 comprises at least one regulating switch, and when the regulating switch is in different switch states, the voltages of the specified voltage reference points on the power regulating module are different;
if the number of the adjusting switches is one, the adjusting switches are opened, the voltage of the voltage reference point is a first voltage value, the adjusting switches are closed, and the voltage of the voltage reference point is a second voltage value; the first voltage value is not equal to the second voltage value;
if the number of the adjusting switches is two, the first adjusting switch and the second adjusting switch are both closed, and the voltage of the voltage reference point is a third voltage value; the number of the adjusting switches can be multiple, and the voltage values of the corresponding voltage reference points are multiple and different;
the driving module 13 comprises a voltage detection pin and a power control pin, the voltage detection pin is connected with a voltage reference point, the power control pin is connected with the light source module, and the output power of the power control pin is matched with the voltage detected by the voltage detection pin;
the voltage detection pin of the driving module 13 is connected with the voltage reference point of the power regulation module 14, the voltage values of the voltage reference points are different, and the voltage values of the voltage detection pin of the driving module 13 are different; the power control pin of the driving module 13 outputs different power according to different reference voltage values detected by the voltage detection pin;
if the voltage detection pin detects a first voltage value, the power control pin outputs a first power; if the voltage detection pin detects a second voltage value, the power control pin outputs a second power; the voltage detection pin detects a plurality of different voltage values, and the power control pin correspondingly outputs a plurality of different powers.
The embodiment of the utility model provides a switch state through at least one regulating switch is different, and power conditioning module 14 outputs different voltage reference point voltage value, and drive module 13 detects different voltage value, corresponds the different power of output to realize light source module 12's adjustting of the lighteness, only can realize DOB power regulation, simple and convenient through at least one regulating switch. The embodiment of the utility model provides a LED control circuit can realize DOB power regulation, and circuit structure is simple, and is with low costs, can be applicable to multiple DOB lighting system.
Referring to fig. 2, in some embodiments, the power regulation module 14 includes a first regulation switch SW1, a first switch Q1, a first resistor R1, and a second resistor R2;
the first end of the first resistor R1 and the first end of the second resistor R2 are both connected with a voltage detection pin of the driving module 13, the second end of the second resistor R2 is connected with the input end of the first switch tube Q1, and the second end of the first resistor R1 and the output end of the first switch tube Q1 are both grounded;
the first regulating switch SW1 is used for controlling the first switch tube Q1, and the output end of the power regulating module 14 is a voltage reference point;
the first regulating switch SW1 is connected with the control end of the first switch tube Q1; if the first regulating switch SW1 is in an off state, the first switch Q1 is turned off, and the voltage value across the first resistor R1 is the first voltage value of the voltage reference point; if the first adjusting switch SW1 is in a closed state, the first switch Q1 is turned on, the first resistor R1 is connected in parallel with the second resistor R2, and the voltage values at the two ends of the first resistor R1 and the second resistor R2 are the second voltage value of the voltage reference point.
Referring to fig. 2, in some embodiments, the power conditioning module further includes a second conditioning switch SW2, a second switch Q2, and a third resistor R3;
the first end of the third resistor R3 is connected with the voltage detection pin of the driving module 13, the second end of the third resistor R3 is connected with the input end of the second switch tube Q2, and the output end of the second switch tube Q2 is grounded;
the second regulating switch SW2 is used for controlling the second switch tube Q2;
the second regulating switch SW2 is connected with the control end of the second switch tube Q2; if the first switch SW1 and the second adjustment switch SW2 are in a closed state, the first switch Q1 and the second switch Q2 are turned on, the first resistor R1, the second resistor R2 and the third resistor R3 are connected in parallel, and voltage values at two ends of the first resistor R1, the second resistor R2 and the third resistor R3 are a third voltage value of the voltage reference point.
Referring to fig. 2, in some embodiments, the power conditioning module 14 further includes a fourth resistor R4, a fifth resistor R5, a sixth resistor R6, and a seventh resistor R7;
the first ends of a fourth resistor R4 and a fifth resistor R5 are connected with an external power supply, the second end of the fourth resistor R4 is connected with the input end of the first regulating switch SW1, and the fifth resistor R5 is connected with the input end of the second regulating switch SW 2;
the output end of the first regulating switch SW1 is connected with the first end of the sixth resistor R6 and is also connected with the control end of a first switching tube Q1;
the output end of the second regulating switch SW2 is connected with the first end of the seventh resistor R7;
the second ends of the sixth resistor R6 and the seventh resistor R7 are both grounded.
In some embodiments, the first switch transistor Q1 and the second switch transistor Q2 are enhancement NMOS transistors;
referring to fig. 2, in some embodiments, the driving module 13 is a scr dimming driving chip, and the scr window driving chip includes a power supply pin IBLE, a power control pin PVIN, a high voltage control pin HV, a ground terminal GND, and a compensation pin COMP;
preferably, the fourth capacitor C4 is connected to the driving module 13 for filtering compensation;
preferably, the fifth capacitor C5 is connected between the power control pin of the driving module 11 and the ground for filtering.
Referring to fig. 2, in some embodiments, the light source module 12 includes an eighth resistor R8, a first capacitor C1, a second capacitor C2, a first voltage regulator tube D1, and a third switch tube Q3, which is at least one LED;
at least one LED is connected in series;
the eighth resistor R8 is connected in parallel with the first capacitor C1 and is used for filtering voltage noise;
the negative electrode of a first voltage-regulator tube D1 is connected with the input end of a third switching tube Q3, the positive electrode of a first voltage-regulator tube D1 and the second end of a second capacitor C2 are connected with the control end of the third switching tube Q3, and the first end of a second capacitor C2 is connected with the output end of the third switching tube Q3 and both connected with the positive electrode of at least one LED;
the first voltage regulator tube D1, the third switch tube Q3 and the second capacitor C2 are used for filtering current noise;
preferably, the first capacitor C1 may be an aluminum electrolytic capacitor, the positive electrode of the first capacitor C1 is connected to the input end of the third switching tube Q3, and the negative electrode of the first capacitor C1 is connected to the control end of the third switching tube Q3;
referring to fig. 2, in some embodiments, the power module 11 is configured to receive a commercial power input and supply power to the light source module 12, the driving module 13, and the adjusting module 14;
the power module 11 may also be connected to the first terminal of the fourth capacitor and the first terminal of the fifth capacitor instead of the external power source.
Referring to fig. 2, in some embodiments, the power module 11 further includes a first fuse FR1, a first rectifier bridge BD1, a first voltage dependent resistor RV1, a ninth resistor R9, a tenth resistor R10, and a first diode D2;
the commercial power is connected with the input end of a first rectifier bridge BD1 through a first fuse FR1, a first piezoresistor RV1 is connected with the output end of the first rectifier bridge BD1, and the anode of the output end of the first rectifier bridge BD1 is sequentially connected with a ninth resistor R9, a first diode D2 and a tenth resistor R10 to supply power to the light source module;
the second end of the ninth resistor R9 is connected with the anode of the first diode D2, the cathode of the first diode D2 is connected with the second end of the tenth resistor R10, and the first diode is used for preventing the reverse connection of the protection circuit;
preferably, the power module 11 further includes an eleventh resistor R11, a third capacitor R3, and a twelfth resistor R12;
the first end of the third capacitor C3 is connected with the second end of the tenth resistor, and the second end of the third capacitor C3 is grounded and used for filtering;
the power module 11 is connected with the second end of the ninth resistor through the first end of an eleventh resistor R11, and the second end of the eleventh resistor R11 is connected with the driving module to supply power to the driving module;
the power module 11 is connected to the second end of the tenth resistor R10 through the first end of the twelfth resistor R12, and the second end of the twelfth resistor R12 is connected to the driving module, so as to provide a high level signal to the driving module;
preferably, the light source module 12 and the driving module 11 are connected through a thirteenth resistor R13, and the thirteenth resistor R13 plays a role of current limiting.
Corresponding to any kind of above-mentioned LED control circuit, the embodiment of the utility model provides a still provides lighting system, and this lighting system includes any kind of above-mentioned LED control circuit, and has the advantage that above-mentioned LED control circuit had, no longer gives unnecessary details here.
The above-mentioned embodiments are only used for illustrating the technical solution of the present invention, and not for limiting the same; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not substantially depart from the spirit and scope of the embodiments of the present invention, and are intended to be included within the scope of the present invention.
Claims (10)
1. An LED control circuit comprises a power supply module, a light source module and a driving module which are arranged on a substrate, and is characterized by further comprising a power adjusting module;
the power regulation module comprises at least one regulation switch, and when the regulation switch is in different switch states, the voltages of specified voltage reference points on the power regulation module are different;
the driving module comprises a voltage detection pin and a power control pin, the voltage detection pin is connected with the voltage reference point, the power control pin is connected with the light source module, and the output power of the power control pin is matched with the voltage detected by the voltage detection pin.
2. The LED control circuit of claim 1, wherein the power regulating module comprises a first regulating switch, a first switching tube, a first resistor and a second resistor;
the first end of the first resistor and the first end of the second resistor are both connected with a voltage detection pin of the driving module, the second end of the second resistor is connected with the input end of the first switch tube, and the second end of the first resistor and the output end of the first switch tube are both grounded;
when the first adjusting switch is in an off state, the first switching tube is switched off, the output end of the power adjusting module is a voltage reference point, and the voltage of the voltage reference point is the voltage at two ends of the first resistor; when the first adjusting switch is in a closed state, the first switch tube is closed, and the voltage reference point voltage is the voltage at two ends of the first resistor and the second resistor.
3. The LED control circuit of claim 2, wherein said power regulation module further comprises a second regulation switch, a second switching tube, and a third resistor;
the first end of the third resistor is connected with a voltage detection pin of the driving module, the second end of the third resistor is connected with the input end of the second switch tube, and the output end of the second switch tube is grounded;
when the second regulating switch is in a closed state, the second switch tube is closed, and the voltage reference point voltage is the voltage at two ends of the first resistor, the second resistor and the third resistor.
4. The LED control circuit of claim 3, wherein said power regulation module further comprises a fourth resistor, a fifth resistor, a sixth resistor, and a seventh resistor;
the first ends of the fourth resistor and the fifth resistor are both connected with an external power supply, the second end of the fourth resistor is connected with the input end of the first regulating switch, and the second end of the fifth resistor is connected with the input end of the second regulating switch;
the output end of the first adjusting switch is connected with the first end of the sixth resistor and also connected with the control end of the first switching tube;
the output end of the second regulating switch is connected with the first end of the seventh resistor and the control end of the second switching tube;
and second ends of the sixth resistor and the seventh resistor are both grounded.
5. The LED control circuit of claim 3, wherein the first switch tube and the second switch tube are enhancement NMOS tubes.
6. The LED control circuit of claim 1, wherein the driver module is a thyristor dimming driver chip.
7. The LED control circuit of claim 1, wherein the light source module comprises an eighth resistor, a first capacitor, a second capacitor, a first voltage regulator tube, a third switch tube, and at least one LED;
the at least one LED is connected in series;
the eighth resistor is connected with the first capacitor in parallel and used for filtering voltage noise;
the cathode of the first voltage-stabilizing tube is connected with the input end of the third switching tube, the anode of the first voltage-stabilizing tube and the second end of the second capacitor are connected with the control end of the third switching tube, and the first end of the second capacitor is connected with the output end of the third switching tube and is connected with the anode of the at least one LED.
8. The LED control circuit according to any of claims 1 to 7, wherein the LED control circuit comprises a power supply module for receiving a mains input and supplying power to the light source module, the driving module and the power conditioning module.
9. The LED control circuit of claim 8, wherein the power module comprises a first fuse, a first rectifier bridge, a first voltage dependent resistor, a ninth resistor, a tenth resistor, and a first diode;
the commercial power is connected with the input end of the first rectifier bridge through the first fuse, the first piezoresistor is connected to the output end of the first rectifier bridge in parallel, and the anode of the output end of the first rectifier bridge is sequentially connected with the ninth resistor, the first diode and the tenth resistor to supply power to the light source module;
and the second end of the ninth resistor is connected with the anode of the first diode, and the cathode of the first diode is connected with the first end of the tenth resistor.
10. A lighting system comprising the LED control circuit of any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022199562.7U CN214154897U (en) | 2020-09-29 | 2020-09-29 | LED control circuit and lighting system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022199562.7U CN214154897U (en) | 2020-09-29 | 2020-09-29 | LED control circuit and lighting system |
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| Publication Number | Publication Date |
|---|---|
| CN214154897U true CN214154897U (en) | 2021-09-07 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022199562.7U Active CN214154897U (en) | 2020-09-29 | 2020-09-29 | LED control circuit and lighting system |
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| CN (1) | CN214154897U (en) |
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- 2020-09-29 CN CN202022199562.7U patent/CN214154897U/en active Active
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