CN105307331A - LED light source lighting circuit capable of reducing current spike - Google Patents
LED light source lighting circuit capable of reducing current spike Download PDFInfo
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- CN105307331A CN105307331A CN201510722431.3A CN201510722431A CN105307331A CN 105307331 A CN105307331 A CN 105307331A CN 201510722431 A CN201510722431 A CN 201510722431A CN 105307331 A CN105307331 A CN 105307331A
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- light source
- led light
- power supply
- lighting circuit
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Abstract
The invention discloses an LED light source lighting circuit capable of reducing current spike, relates to the field of LED light source lighting circuits, and especially relates to the technical field of LED light source lighting circuits capable of reducing current spike. The LED light source lighting circuit comprises a direct-current power supply, a capacitor, a controller, and an LED light source. The direct-current power supply outputs positive and negative wires, and provides electric energy for the whole lighting circuit. The capacitor is connected to the positive and negative ends of the direct-current power supply, carries out charging or discharging as the voltage of the direct-current power supply increases or decreases, and plays a role in reducing the fluctuation of circuit voltage. The controller outputs an on-off control signal to the LED light source to control on-off of the lighting circuit on one hand, and on the other hand, the controller outputs a voltage control signal to the direct-current power supply to control the size of voltage. Through electric energy from the direct-current power supply, the LED light source is turned on when a switch-on signal sent by the controller is received, and the LED light source is turned off when a switch-off signal is received. The LED light source lighting circuit is mainly applied to the field of LED light source lighting circuits.
Description
Technical field
The present invention relates to LED light source illumination circuit field, especially relate to a kind of LED light source lighting circuit that can reduce current spike.
Background technology
In current generation, large-power light-emitting diodes (hereinafter referred to as " LED light source "), as novel green lighting technology, has the advantages such as light conversion efficiency is high, energy consumption is low, the life-span is long, Maintenance free, is applied to various lighting field gradually.The long-life of LED light source is the operational environment based on its safety, for LED light source, main threat comes from over-current shock, it is exactly the rated current that electric current that LED light source applies exceedes in this LED light source technical data handbook, the reason of overcurrent is caused to be many-sided, as the over-voltage events such as conducting moment, power network fluctuation of transient state thunderbolt, Switching Power Supply.These events are all transient states, and the duration is extremely short, and we are referred to as spike usually, this overcurrent, and we are referred to as " current spike ".Due to current most LED light source lighting circuit conducting moment be all that rated voltage is directly strengthened on LED light source, exactly because the common disadvantage of this design, cause LED light source and there is very large current spike instantaneously in conducting, this causes huge harm to LED light source.
In order to improve this problem, a LED light source lighting circuit that can reduce current spike of my company's designed, designed, by the charging effect of electric capacity, shunts conducting immediate current, and then reduce immediate current, reduce the infringement of current spike to LED light source.
Summary of the invention
The problem to be solved in the present invention is, provides a kind of LED light source lighting circuit reducing current spike, reduces LED light source conducting immediate current amplitude, reduces current spike.
For solving the problems of the technologies described above, the technical solution used in the present invention is: a kind of LED light source lighting circuit reducing current spike, comprises DC power supply, electric capacity, controller, LED light source.The positive pole of DC power supply and negative pole receive the corresponding polar end of electric capacity and LED light source respectively, and controller sends voltage control signal and break-make control signal respectively to DC power supply and LED light source.DC power supply: output cathode, negative pole two line conductor, for whole lighting circuit provides electric energy; Electric capacity: the positive and negative two ends being connected to DC power supply, carries out charging and discharging with the rising of direct current power source voltage and reduction, plays the effect of the fluctuation reducing circuit voltage; Controller: export break-make control signal on the one hand to LED light source, control switching on and off of lighting circuit, output voltage control signal is to DC power supply on the other hand, and the height of control voltage, makes DC power supply send low-voltage and rated voltage; LED light source: utilize the electric energy from DC power supply, when receiving controller and sending Continuity signal, LED will light, and when receiving cut-off signal, LED will extinguish.
Further, controller produces the technology of voltage control signal and break-make control signal is pulse width modulating technology (hereinafter referred to as " PWM ").
Further, capacitor is electrochemical capacitor.
Further, the low-voltage that DC power supply sends is 0.8 times of rated voltage.
The invention has the beneficial effects as follows: LED light source conducting immediate current amplitude can be reduced, decrease current spike, reduce the infringement of current spike to LED light source.Avoid LED light source at lighting circuit conducting immediate current spike to the impact of LED light source, remarkable result is played for the useful life extending LED light source.
Accompanying drawing explanation
Fig. 1 is a kind of overall structure figure reducing the LED light source lighting circuit of current spike of the present invention.
Embodiment
As shown in Figure 1, the invention provides a kind of LED light source lighting circuit reducing current spike, comprise DC power supply, electric capacity, controller, LED light source.The positive pole of DC power supply and negative pole receive the corresponding polar end of electric capacity and LED light source respectively, and controller sends voltage control signal and break-make control signal respectively to DC power supply and LED light source.DC power supply: output cathode, negative pole two line conductor, for whole lighting circuit provides electric energy; Electric capacity: the positive and negative two ends being connected to DC power supply, carries out charging and discharging with the rising of direct current power source voltage and reduction, plays the effect of the fluctuation reducing circuit voltage; Controller: export break-make control signal on the one hand to LED light source, control switching on and off of lighting circuit, output voltage control signal is to DC power supply on the other hand, the height of control voltage; LED light source: utilize the electric energy from DC power supply, when receiving controller and sending Continuity signal, LED will light, and when receiving cut-off signal, LED will extinguish.
Real-time process of the present invention: when not needing LED light source to light, controller sends out cut-off signal to LED light source on the one hand, and send out low voltage signal to DC power supply on the other hand, now electric capacity both end voltage and DC power supply both end voltage are consistent, and are in low-voltage, when needs LED light source is lighted, Continuity signal sent out by controller on the one hand LED light source, nominal voltage signal is sent out on the other hand to DC power supply, now electric capacity both end voltage is lower than DC power supply both end voltage, the spontaneous charging of electric capacity, the electric current that DC power supply exports is shunted, make to be reduced by LED light source immediate current, reduce the infringement that current spike causes LED light source, along with the charging gradually of electric capacity, shunting action reduces gradually, rated current is returned to gradually by the electric current of LED light source, , after capacitor charging completes, LED light source will in stable operation under rated current.
Above one embodiment of the present of invention have been described in detail, but described content being only preferred embodiment of the present invention, can not being considered to for limiting practical range of the present invention.All equalizations done according to the present patent application scope change and improve, and all should still belong within patent covering scope of the present invention.
Claims (4)
1. one kind is reduced the LED light source lighting circuit of current spike, it is characterized in that: the positive pole of DC power supply and negative pole receive the corresponding polar end of electric capacity and LED light source respectively, controller sends voltage control signal and break-make control signal respectively to DC power supply and LED light source.
2. a kind of LED light source lighting circuit reducing current spike as claimed in claim 1, is characterized in that: the technology that described controller produces voltage control signal and break-make control signal is pulse width modulating technology (hereinafter referred to as " PWM ").
3. a kind of LED light source lighting circuit reducing current spike as claimed in claim 1, is characterized in that: described capacitor is electrochemical capacitor.
4. a kind of LED light source lighting circuit reducing current spike as claimed in claim 1, is characterized in that: the low-voltage that described DC power supply sends is 0.8 times of rated voltage.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510722431.3A CN105307331A (en) | 2015-10-31 | 2015-10-31 | LED light source lighting circuit capable of reducing current spike |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510722431.3A CN105307331A (en) | 2015-10-31 | 2015-10-31 | LED light source lighting circuit capable of reducing current spike |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105307331A true CN105307331A (en) | 2016-02-03 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510722431.3A Pending CN105307331A (en) | 2015-10-31 | 2015-10-31 | LED light source lighting circuit capable of reducing current spike |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105307331A (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009105016A (en) * | 2007-10-25 | 2009-05-14 | Panasonic Electric Works Co Ltd | Led lighting system |
| CN103325345A (en) * | 2012-03-23 | 2013-09-25 | 索尼公司 | Light emitting element drive device, light emitting element drive method, and display apparatus |
| CN104822198A (en) * | 2015-04-20 | 2015-08-05 | 南京矽力杰半导体技术有限公司 | Control circuit and control method for multiple paths of LED lamp strings |
-
2015
- 2015-10-31 CN CN201510722431.3A patent/CN105307331A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009105016A (en) * | 2007-10-25 | 2009-05-14 | Panasonic Electric Works Co Ltd | Led lighting system |
| CN103325345A (en) * | 2012-03-23 | 2013-09-25 | 索尼公司 | Light emitting element drive device, light emitting element drive method, and display apparatus |
| CN104822198A (en) * | 2015-04-20 | 2015-08-05 | 南京矽力杰半导体技术有限公司 | Control circuit and control method for multiple paths of LED lamp strings |
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| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20160203 |
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| RJ01 | Rejection of invention patent application after publication |