CN108093506B - LED drive circuit for multiplexing daytime running light and position light - Google Patents
LED drive circuit for multiplexing daytime running light and position light Download PDFInfo
- Publication number
- CN108093506B CN108093506B CN201611042225.9A CN201611042225A CN108093506B CN 108093506 B CN108093506 B CN 108093506B CN 201611042225 A CN201611042225 A CN 201611042225A CN 108093506 B CN108093506 B CN 108093506B
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- power supply
- daytime running
- input power
- driving circuit
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- HEZMWWAKWCSUCB-PHDIDXHHSA-N (3R,4R)-3,4-dihydroxycyclohexa-1,5-diene-1-carboxylic acid Chemical compound O[C@@H]1C=CC(C(O)=O)=C[C@H]1O HEZMWWAKWCSUCB-PHDIDXHHSA-N 0.000 claims abstract description 31
- 230000001960 triggered effect Effects 0.000 claims description 4
- 238000005457 optimization Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000004907 flux Effects 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 230000008092 positive effect Effects 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
Classifications
-
- 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
- H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
-
- 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
The invention relates to the technical field of LED driving circuits of automobiles, in particular to an LED driving circuit for multiplexing daytime running lights and position lights, which comprises a daytime running light input power supply, a position light input power supply, an input protection circuit, a voltage division circuit, a PWM dimming circuit, a DCDC driving circuit, an OR gate circuit and an LED load. The invention realizes multiplexing of the daytime running light and the position light through a series of LEDs, has flexible control mode and reduces the cost.
Description
Technical Field
The invention relates to the technical field of LED driving circuits of automobiles, in particular to an LED driving circuit for multiplexing daytime running lights and position lights.
Background
With the continuous development of the LED technology, particularly, since the LED particles can be formed into various unique shapes in different combinations, the application of LEDs in the fields of automotive lamps and lighting technology is becoming wider and wider. However, due to the cost and the modeling requirements, more and more lamp designs require the same string of LEDs to respectively realize the functions of a daytime running light and a position light.
At present, when the LED daytime running light and the position light are shared, the control is mainly carried out through different power inputs, the control mode is single, and meanwhile, when the power supplies of the daytime running light and the position light are simultaneously powered, the LED cannot show the function of the daytime running light.
Disclosure of Invention
The invention relates to an LED driving circuit for multiplexing a daytime running light and a position light, which is particularly used for freely setting two paths of different output current values aiming at the daytime running light LEDs of the current automotive headlamp, so that the same string of LEDs generate different luminous flux outputs, and the multiplexing function of the daytime running light and the position light is realized.
In order to achieve the purpose of the invention, the technical scheme adopted is as follows: the utility model provides a day portable lamp and multiplexing LED drive circuit of position lamp, including day portable lamp input power supply, position lamp input power supply, input protection circuit, bleeder circuit, PWM dimmer circuit, DCDC drive circuit, OR gate circuit and an LED load, day portable lamp input power supply and position lamp input power supply are connected with DCDC drive circuit through input protection circuit respectively, DCDC drive circuit's output is connected with the input of LED load, input protection circuit passes through bleeder circuit and connects an input at OR gate circuit, position lamp input power supply passes through PWM dimmer circuit and connects another input at OR gate circuit, the output of OR gate circuit is connected on DCDC drive circuit's control pin.
As an optimization scheme of the invention, the PWM dimming circuit is a 555 chip.
As an optimization scheme of the invention, the DCDC driving circuit is an MPQ2483 chip.
As an optimization scheme of the invention, the OR gate is a double diode, and the double diode comprises two diodes connected in parallel.
The invention has the positive effects that: the invention realizes multiplexing of the daytime running light and the position light through a series of LEDs, has flexible control mode and reduces the cost.
Drawings
The invention will be described in further detail with reference to the drawings and the detailed description.
FIG. 1 is a schematic block diagram of the present invention;
fig. 2 is a schematic circuit diagram of the present invention.
Wherein: 1. the solar lamp input power supply, the position lamp input power supply, the input protection circuit, the voltage dividing circuit, the PWM dimming circuit, the DCDC driving circuit, the OR gate circuit, the LED load and the LED load are respectively arranged in sequence.
Detailed Description
As shown in fig. 1 and 2, the invention discloses a daytime running light and position light multiplexing LED driving circuit, which comprises a daytime running light input power supply 1, a position light input power supply 2, an input protection circuit 3, a voltage division circuit 4, a PWM dimming circuit 5, a DCDC driving circuit 6, an or circuit 7 and an LED load 8, wherein the daytime running light input power supply 1 and the position light input power supply 2 are respectively connected with the DCDC driving circuit 6 through the input protection circuit 3, the output end of the DCDC driving circuit 6 is connected with the input end of the LED load 8, the input protection circuit 3 is connected with one input end of the or circuit 7 through the voltage division circuit 4, the position light input power supply 2 is connected with the other input end of the or circuit 7 through the PWM dimming circuit 5, and the output end of the or circuit 7 is connected with the control pin of the DCDC driving circuit 6. The current required by the LED load 8 as a position lamp is smaller than the current required by the LED load as a daytime running lamp, and the voltage dividing circuit 4 is a resistor RD1.
PWM dimming circuit 5 is 555 chip
The DCDC driving circuit 6 is an MPQ2483 chip. The 7 th pin of the MPQ2483 chip is a dimming control pin, and when the input voltage of the pin is greater than 1.4V, the DCDC driving circuit 6 outputs current according to the current value set by the sampling resistor; when the pin inputs a PWM signal, if the duty ratio of PWM is 10%, the DCDC driving circuit 6 outputs a current of 10% of the set current.
The or circuit 7 is a double diode comprising two diodes connected in parallel.
When the daytime running light input power supply 1 is triggered in operation, the daytime running light input power supply 1 supplies power to the DCDC driving circuit 6 after passing through the input protection circuit 3, meanwhile, the daytime running light input power supply 1 generates voltage higher than 1.4V on the 7 th pin of the DCDC driving circuit 6 through the voltage dividing circuit 4, the DCDC driving circuit 6 works and outputs set constant current to the LED load 8, and at the moment, the LED load 8 shows a daytime running light function.
When the position lamp input power supply 2 is triggered, the input protection circuit 3 supplies power to the DCDC driving circuit 6, meanwhile, the PWM dimming circuit 5 works to generate a square wave signal with a duty ratio of 10%, the DCDC driving circuit 6 outputs constant current to the LED load 8 according to 10% of the set current, and at the moment, the LED load 8 shows a position lamp function.
When the daytime running light input power supply 1 and the position light input power supply 2 are input simultaneously, the high level generated on the voltage dividing circuit 4 and the square wave level of the high-low signal generated by the PWM dimming circuit 5 pass through the OR gate circuit 7 and then output the high level, so that the DCDC driving circuit 6 outputs constant current according to the set current value, and the LED load 8 shows a daytime running light function.
While the foregoing is directed to embodiments of the present invention, other and further details of the invention may be had by the present invention, it should be understood that the foregoing description is merely illustrative of the present invention and that no limitations are intended to the scope of the invention, except insofar as modifications, equivalents, improvements or modifications are within the spirit and principles of the invention.
Claims (4)
1. The utility model provides a day portable lighter and multiplexing LED drive circuit of position lamp which characterized in that: the solar street lamp comprises a solar street lamp input power supply (1), a position lamp input power supply (2), an input protection circuit (3), a voltage division circuit (4), a PWM dimming circuit (5), a DCDC driving circuit (6), an OR gate circuit (7) and an LED load (8), wherein the solar street lamp input power supply (1) and the position lamp input power supply (2) are respectively connected with the DCDC driving circuit (6) through the input protection circuit (3), the output end of the DCDC driving circuit (6) is connected with the input end of the LED load (8), the input protection circuit (3) is connected with one input end of the OR gate circuit (7) through the voltage division circuit (4), the position lamp input power supply (2) is connected with the other input end of the OR gate circuit (7) through the PWM dimming circuit (5), and the output end of the OR gate circuit (7) is connected to a control pin of the DCDC driving circuit (6).
When the daytime running light input power supply (1) is triggered, the daytime running light input power supply (1) supplies power to the DCDC driving circuit (6) through the input protection circuit (3), meanwhile, the daytime running light input power supply (1) generates voltage higher than 1.4V in the DCDC driving circuit (6) through the voltage dividing circuit 4, the DCDC driving circuit (6) works to output set constant current to the LED load (8), and at the moment, the LED load (8) shows a daytime running light function;
When the position lamp input power supply (2) is triggered, the input protection circuit (3) supplies power to the DCDC driving circuit (6), meanwhile, the PWM dimming circuit (5) works to generate a square wave signal with a duty ratio of 10%, the DCDC driving circuit (6) outputs constant current to the LED load (8) according to 10% of the set current, and at the moment, the LED load (8) shows a position lamp function;
When the daytime running light input power supply (1) and the position light input power supply (2) are input simultaneously, the high level generated on the voltage dividing circuit (4) and the square wave level of the high and low signals generated by the PWM dimming circuit (5) pass through the OR gate circuit (7) and then output the high level, so that the DCDC driving circuit (6) outputs constant current according to a set current value, and the LED load (8) shows a daytime running light function.
2. The LED driver circuit for multiplexing a daytime running light and a position light according to claim 1, wherein: the PWM dimming circuit (5) is a 555 chip.
3. The LED driver circuit for multiplexing a daytime running light and a position light according to claim 1, wherein: the DCDC driving circuit (6) is an MPQ2483 chip.
4. The LED driver circuit for multiplexing a daytime running light and a position light according to claim 1, wherein: the OR gate circuit (7) is a double diode, and the double diode comprises two diodes connected in parallel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611042225.9A CN108093506B (en) | 2016-11-23 | 2016-11-23 | LED drive circuit for multiplexing daytime running light and position light |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611042225.9A CN108093506B (en) | 2016-11-23 | 2016-11-23 | LED drive circuit for multiplexing daytime running light and position light |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108093506A CN108093506A (en) | 2018-05-29 |
| CN108093506B true CN108093506B (en) | 2024-04-19 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201611042225.9A Active CN108093506B (en) | 2016-11-23 | 2016-11-23 | LED drive circuit for multiplexing daytime running light and position light |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108093506B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108811253A (en) * | 2018-07-17 | 2018-11-13 | 常州星宇车灯股份有限公司 | The DC-DC booster circuit of open circuit protecting function is used in LED module |
Citations (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5081565A (en) * | 1990-11-08 | 1992-01-14 | Chrysler Corporation | Daytime running light system |
| JP2012023029A (en) * | 2010-06-18 | 2012-02-02 | Anden | Power supply device for light-emitting diode drive |
| FR2989648A1 (en) * | 2012-04-18 | 2013-10-25 | Renault Sa | Lighting system for car, has lighting unit used as day running light, and another lighting unit used as night light, where control unit controls transistor to close or open power supply circuit of latter lighting unit |
| CN203327320U (en) * | 2013-06-27 | 2013-12-04 | 神龙汽车有限公司 | LED anti-flicker circuit |
| CN103557502A (en) * | 2013-10-12 | 2014-02-05 | 奇瑞汽车股份有限公司 | Control circuit of automobile LED daytime running lamp |
| CN103561527A (en) * | 2013-11-19 | 2014-02-05 | 神龙汽车有限公司 | Dual-function LED drive circuit |
| CN104149684A (en) * | 2014-08-14 | 2014-11-19 | 王工 | Daytime-driving steering lamp |
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| CN204377199U (en) * | 2015-01-09 | 2015-06-03 | 嘉兴市光泰照明有限公司 | Adopt constant current driver circuit for LED and the device of step-down constant current driving unit |
| CN204634104U (en) * | 2015-04-29 | 2015-09-09 | 神龙汽车有限公司 | A kind of three function LED drive circuits |
| CN105493630A (en) * | 2013-08-02 | 2016-04-13 | 雷诺股份公司 | Light-emitting diode device |
| CN106060996A (en) * | 2015-04-07 | 2016-10-26 | 株式会社小糸制作所 | Lighting circuit |
| CN206283685U (en) * | 2016-11-23 | 2017-06-27 | 常州星宇车灯股份有限公司 | A kind of day portable lighter and the LED drive circuit of position lamp multiplexing |
-
2016
- 2016-11-23 CN CN201611042225.9A patent/CN108093506B/en active Active
Patent Citations (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5081565A (en) * | 1990-11-08 | 1992-01-14 | Chrysler Corporation | Daytime running light system |
| JP2012023029A (en) * | 2010-06-18 | 2012-02-02 | Anden | Power supply device for light-emitting diode drive |
| FR2989648A1 (en) * | 2012-04-18 | 2013-10-25 | Renault Sa | Lighting system for car, has lighting unit used as day running light, and another lighting unit used as night light, where control unit controls transistor to close or open power supply circuit of latter lighting unit |
| CN203327320U (en) * | 2013-06-27 | 2013-12-04 | 神龙汽车有限公司 | LED anti-flicker circuit |
| CN105493630A (en) * | 2013-08-02 | 2016-04-13 | 雷诺股份公司 | Light-emitting diode device |
| CN103557502A (en) * | 2013-10-12 | 2014-02-05 | 奇瑞汽车股份有限公司 | Control circuit of automobile LED daytime running lamp |
| CN103561527A (en) * | 2013-11-19 | 2014-02-05 | 神龙汽车有限公司 | Dual-function LED drive circuit |
| CN104210416A (en) * | 2014-08-07 | 2014-12-17 | 奇瑞汽车股份有限公司 | Daytime running lamp system for automobile |
| CN104149684A (en) * | 2014-08-14 | 2014-11-19 | 王工 | Daytime-driving steering lamp |
| CN204377199U (en) * | 2015-01-09 | 2015-06-03 | 嘉兴市光泰照明有限公司 | Adopt constant current driver circuit for LED and the device of step-down constant current driving unit |
| CN106060996A (en) * | 2015-04-07 | 2016-10-26 | 株式会社小糸制作所 | Lighting circuit |
| CN204634104U (en) * | 2015-04-29 | 2015-09-09 | 神龙汽车有限公司 | A kind of three function LED drive circuits |
| CN206283685U (en) * | 2016-11-23 | 2017-06-27 | 常州星宇车灯股份有限公司 | A kind of day portable lighter and the LED drive circuit of position lamp multiplexing |
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| Title |
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| 高调光比新型汽车日行灯HB LED光源驱动器;刁智海;马皓;;电源世界(第03期);全文 * |
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| CN108093506A (en) | 2018-05-29 |
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