CN209787523U - LED drive circuit and LED lamp - Google Patents
LED drive circuit and LED lamp Download PDFInfo
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- CN209787523U CN209787523U CN201822246061.2U CN201822246061U CN209787523U CN 209787523 U CN209787523 U CN 209787523U CN 201822246061 U CN201822246061 U CN 201822246061U CN 209787523 U CN209787523 U CN 209787523U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B20/00—Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps
- Y02B20/30—Semiconductor lamps, e.g. solid state lamps [SSL] light emitting diodes [LED] or organic LED [OLED]
Abstract
An LED drive circuit and an LED lamp, the LED drive circuit includes: the DALI dimming module, the linear voltage dimming module and the dial-up dimming module are all arranged to be used for generating dimming signals; the control module is connected with the DALI dimming module, the linear voltage dimming module and the dial dimming module and used for adjusting the duty ratio of the output PWM signal according to the dimming signal; the constant current driving module is connected with a power supply and is used for adjusting working current according to the PWM signal; and the output module is coupled with the constant current driving module, connected with the LED lamp and used for inducing the working current to generate output current. Three modes of DALI dimming, 0-10V linear dimming and dial dimming are integrated, and the problems of single LED driving dimming mode and poor compatibility are solved.
Description
Technical Field
The utility model belongs to the technical field of the LED drive, especially, relate to a LED drive circuit and LED lamps and lanterns.
Background
At present, the demand of the traditional lamp driving for the dimming function is more and more popular, and there are various dimming modes, such as DALI (Digital Addressable Lighting Interface) dimming, linear voltage dimming, dial dimming current, and the like. Different markets and customers have different requirements on dimming modes, and the dimming mode is not matched with a home dimming system when being selected and purchased. In addition, in order to meet the customer requirements, the suppliers have large driving stock models and large stock quantities, and the cost is high.
SUMMERY OF THE UTILITY MODEL
In view of this, the embodiment of the utility model provides a LED drive circuit and LED lamps and lanterns aims at solving traditional LED drive mode of adjusting luminance single, compatible poor problem.
the utility model provides a first aspect of the embodiment provides a LED drive circuit, include:
The DALI dimming module, the linear voltage dimming module and the dial-up dimming module are all arranged to be used for generating dimming signals;
The control module is connected with the DALI dimming module, the linear voltage dimming module and the dial dimming module and used for adjusting the duty ratio of the output PWM signal according to the dimming signal;
The constant current driving module is connected with a power supply and is used for adjusting working current according to the PWM signal; and
And the output module is coupled with the constant current driving module, connected with the LED lamp and used for inducing the working current to generate output current.
In one embodiment, the control module includes a controller having at least five dimming inputs and a PWM signal output, the at least five dimming inputs are a first dimming input, a second dimming input, and at least three third dimming inputs, respectively, and the control module adjusts the duty ratio of the PWM signal output by the PWM signal output according to the signal variation of each dimming input.
In one embodiment, the linear voltage dimming module comprises a linear dimming chip, a photoelectric coupler and a voltage stabilizing diode;
The power supply pin of the linear dimming chip is connected with the output bus of the output module, the dimming input pin and the ground pin of the linear dimming chip are connected with the dimming voltage, the dimming output pin of the linear dimming chip is connected with the input end of the photoelectric coupler, the output end of the photoelectric coupler is connected with the first dimming input end of the control module, the anode of the voltage stabilizing diode is grounded, and the cathode of the voltage stabilizing diode is connected with the output end of the photoelectric coupler.
In one embodiment, the DALI dimming module comprises a DALI dimming chip, and an output terminal of the DALI dimming chip is connected to the second dimming input terminal of the control module.
In one embodiment, the dial dimming module includes at least three dial switches, and each dial switch is connected to the third dimming input of each control module.
in one embodiment, the constant current driving module includes a constant current driving chip, a power switch tube and a primary winding of a transformer, wherein,
the PWM signal input pin of the constant current driving chip is connected with the control module to access the PWM signal, the driving pin of the constant current driving chip is connected with the base electrode of the power switch tube, the low potential end of the power switch tube is grounded through a sampling resistor, the high potential end of the power switch tube is connected with one end of the primary winding, and the other end of the primary winding is connected with the power supply.
In one embodiment, the lighting device further comprises a voltage stabilizing module, wherein one end of the voltage stabilizing module is connected with the power supply, and the other end of the voltage stabilizing module provides working voltage for the control module, the DALI dimming module, the linear voltage dimming module and the dial-up dimming module.
a second aspect of the embodiments provides a LED lamp, including the LED lamp, its characterized in that, including foretell LED drive circuit.
The LED driving circuit and the LED lamp integrate three ways of DALI dimming, 0-10V linear dimming and dial dimming, and the control module is used for respectively receiving three dimming signals and adjusting the duty ratio of the PWM signal of the constant current driving module controlled by the control module, so that the purpose of controlling the magnitude of the output current supplied to the LED is achieved, and the problems of single LED driving dimming way and poor compatibility are solved.
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 structural diagram of an LED driving circuit provided in an embodiment of the present invention;
FIG. 2 is an exemplary circuit schematic of the LED driver circuit shown in FIG. 1;
FIG. 3 is an exemplary circuit schematic of a control module and a dial dimming module of the LED driver circuit shown in FIG. 1;
Fig. 4 is a schematic circuit diagram of an example of a DALI dimming module in the LED driving circuit shown in fig. 1.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
referring to fig. 1, an LED driving circuit according to an embodiment of the present invention includes a constant current driving module 10, an output module 20, a control module 30, a DALI dimming module 40, a linear voltage (e.g., 0-10V) dimming module 50, and a dial (current) dimming module 60.
The DALI dimming module 40, the linear voltage dimming module 50, and the dial dimming module 60 are all set to DALI for generating a dimming signal; the control module 30 is connected with the DALI dimming module 40, the linear voltage dimming module 50 and the dial dimming module 60, and adjusts the duty ratio of the output PWM signal according to the dimming signal; the constant current driving module 10 is connected with a power supply and is set to regulate working current according to the PWM signal; the output module 20 is coupled with the constant current driving module 10, connected with the LED lamp, and configured to induce the working current to generate an output current.
Referring to fig. 2, in one embodiment, the output module 20 includes a secondary winding of the transformer T1, a rectifier diode D1, a filter capacitor C1, and a common mode inductor L1.
referring to fig. 2 and 3, in an embodiment, the control module 30 includes a controller U1, the controller U1 has at least five dimming inputs and a PWM signal output PA7, the at least five dimming inputs respectively include a first dimming input PA6, a second dimming input PA5, and at least three third dimming inputs PA0-3, and the control module 30 adjusts the duty ratio of the PWM signal output from the PWM signal output PA7 according to the signal variation of the dimming inputs. In this example, the control module 30 is a dimming compatible controller U1, which may be a single chip or a chip dedicated to dimming compatibility.
Referring to fig. 2, in an embodiment, the linear voltage dimming module 50 includes a linear dimming chip U2, a photo coupler U3, and a zener diode D2; the power supply pin of the linear dimming chip U2 is connected with the output bus of the output module 20, the dimming input pin of the linear dimming chip U2 and the dimming voltage input pin of the ground control pin, the dimming output pin of the linear dimming chip U2 is connected with the input end of the photoelectric coupler U3, the output end of the photoelectric coupler U3 is connected with the first dimming input end PA6 of the control module 30, the anode of the zener diode D2 is grounded, and the cathode of the photoelectric coupler U3 is connected with the output end of the photoelectric coupler U3. In this example, the dimming voltage is 0-10V, and in other embodiments, may be in other conventional voltage ranges.
Referring to fig. 4, IN an embodiment, the DALI dimming module 40 includes a DALI dimming chip U4, and the output PWM IN2 of the DALI dimming chip U4 is connected to the second dimming input PA5 of the control module 30.
referring to fig. 2 and 3, in one embodiment, the dial dimming module 60 includes at least three dial switches, and each dial switch is connected to the third dimming input PA0-3 of each control module 30. In this example, there are three dial switches, SW1, SW2, and SW 3.
Referring to fig. 1 and 2, in an embodiment, the constant current driving module 10 includes a constant current driving chip U5, a power switch Q1, and a primary winding of a transformer T1. The PWM signal input pin of the constant current driving chip U5 is connected with the control module 30 to access the PWM signal, the driving pin of the constant current driving chip U5 is connected with the base electrode of the power switch tube Q1, the low potential end of the power switch tube Q1 is grounded through a sampling resistor R3, the high potential end of the power switch tube Q1 is connected with one end of the primary winding, and the other end of the primary winding is connected with the power supply. Further, the constant current driving module 10 further includes a start resistor R1 connected in series between the power supply and the power supply pin, and an auxiliary winding of a transformer T1 for supplying power after start-up. Generally, the power switch Q1 is an N-channel MOS transistor.
Referring to fig. 2, in an embodiment, the LED driving circuit further includes a voltage stabilizing module 70, one end of the voltage stabilizing module 70 is connected to the power supply, and the other end of the voltage stabilizing module 70 provides a 5.0V working voltage for the control module 30, the DALI dimming module 40, the linear voltage dimming module 50, and the dial dimming module 60. The voltage stabilizing module 70 includes a voltage stabilizing chip.
Referring to fig. 1 to 4, specifically, when the dial-up dimming module 60 generates a dimming signal, the controller U1 sets the duty ratio of the corresponding PWM signal at the PWM signal output terminal PA7 to control the constant current driving module 10 to implement dimming; when the controller U1 is applied to DALI dimming or linear voltage dimming, the first dimming input PA6 and the second dimming input PA5 of the controller U1 receive dimming signals generated by the DALI dimming module 40 and the linear voltage dimming module 50, and the controller U1 sets the duty ratio of the corresponding PWM signal at the PWM signal output PA7 to control the constant current driving module 10 to implement dimming;
the dial dimming module 60 is connected to the control module 30 through three dial switches SW1, SW2, and SW3, and the PWM signal output terminal PA7 of the control module 30 outputs a duty ratio corresponding to the maximum current through different combinations of three switch states.
a second aspect of the embodiments of the present invention provides a LED lamp, including a LED lamp and the above-mentioned LED driving circuit.
The LED driving circuit and the LED lamp integrate three ways of DALI dimming, 0-10V linear dimming and dial dimming, and the control module 30 is used for respectively receiving three dimming signals and adjusting the duty ratio of the PWM signal of the constant current driving module 10 controlled by the dimming signals so as to achieve the purpose of controlling the magnitude of the output current supplied to the LED and solve the problems of single LED driving dimming way and poor compatibility.
The above description is only exemplary of the present invention and should not be taken as limiting the scope of the present invention, as any modifications, equivalents, improvements and the like made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.
Claims (8)
1. An LED driving circuit, comprising:
The DALI dimming module, the linear voltage dimming module and the dial-up dimming module are all arranged to be used for generating dimming signals;
the control module is connected with the DALI dimming module, the linear voltage dimming module and the dial dimming module and used for adjusting the duty ratio of the output PWM signal according to the dimming signal;
The constant current driving module is connected with a power supply and is used for adjusting working current according to the PWM signal; and
And the output module is coupled with the constant current driving module, connected with the LED lamp and used for inducing the working current to generate output current.
2. The LED driving circuit of claim 1, wherein the control module comprises a controller having at least five dimming inputs and one PWM signal output, the at least five dimming inputs being a first dimming input, a second dimming input, and at least three third dimming inputs, respectively, and the control module adjusts the duty cycle of the PWM signal output by the PWM signal output according to the signal variation of each dimming input.
3. the LED driving circuit according to claim 2, wherein the linear voltage dimming module comprises a linear dimming chip, a photo coupler, and a zener diode;
The power supply pin of the linear dimming chip is connected with the output bus of the output module, the dimming input pin and the ground pin of the linear dimming chip are connected with the dimming voltage, the dimming output pin of the linear dimming chip is connected with the input end of the photoelectric coupler, the output end of the photoelectric coupler is connected with the first dimming input end of the control module, the anode of the voltage stabilizing diode is grounded, and the cathode of the voltage stabilizing diode is connected with the output end of the photoelectric coupler.
4. the LED driving circuit of claim 2, wherein the DALI dimming module comprises a DALI dimming chip, an output of the DALI dimming chip being connected to the second dimming input of the control module.
5. the LED driver circuit of claim 2, wherein the dial dimming module comprises at least three dial switches, each of the dial switches being connected to the third dimming input of each of the control modules.
6. The LED driving circuit according to claim 1 or 2, wherein the constant current driving module comprises a constant current driving chip, a power switch tube and a primary winding of a transformer, wherein,
The PWM signal input pin of the constant current driving chip is connected with the control module to access the PWM signal, the driving pin of the constant current driving chip is connected with the base electrode of the power switch tube, the low potential end of the power switch tube is grounded through a sampling resistor, the high potential end of the power switch tube is connected with one end of the primary winding, and the other end of the primary winding is connected with the power supply.
7. the LED driving circuit of claim 1, further comprising a voltage regulation module, wherein one end of the voltage regulation module is connected to the power supply, and the other end of the voltage regulation module provides operating voltages for the control module, the DALI dimming module, the linear voltage dimming module, and the dial-up dimming module.
8. an LED lamp comprising an LED lamp, characterized by comprising the LED driving circuit of any one of claims 1 to 7.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822246061.2U CN209787523U (en) | 2018-12-29 | 2018-12-29 | LED drive circuit and LED lamp |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201822246061.2U CN209787523U (en) | 2018-12-29 | 2018-12-29 | LED drive circuit and LED lamp |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112188679A (en) * | 2020-09-02 | 2021-01-05 | 深圳市崧盛电子股份有限公司 | DALI (digital addressable lighting interface) bus-based LED (light emitting diode) power supply and output adjusting method and system thereof |
| CN112804792A (en) * | 2021-04-13 | 2021-05-14 | 深圳市安规科技有限公司 | Dimming power module and LED dimming device of steady voltage power supply |
| CN114096033A (en) * | 2021-11-10 | 2022-02-25 | 东莞华明灯具有限公司 | Self-dimming and external dimming two-in-one dimming system |
| CN114173452A (en) * | 2021-11-03 | 2022-03-11 | 广东艾迪明电子有限公司 | Compound dimming control system |
-
2018
- 2018-12-29 CN CN201822246061.2U patent/CN209787523U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112188679A (en) * | 2020-09-02 | 2021-01-05 | 深圳市崧盛电子股份有限公司 | DALI (digital addressable lighting interface) bus-based LED (light emitting diode) power supply and output adjusting method and system thereof |
| CN112804792A (en) * | 2021-04-13 | 2021-05-14 | 深圳市安规科技有限公司 | Dimming power module and LED dimming device of steady voltage power supply |
| CN114173452A (en) * | 2021-11-03 | 2022-03-11 | 广东艾迪明电子有限公司 | Compound dimming control system |
| CN114096033A (en) * | 2021-11-10 | 2022-02-25 | 东莞华明灯具有限公司 | Self-dimming and external dimming two-in-one dimming system |
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