CN203661367U - A drive circuit for an LED agricultural fluorescent lamp - Google Patents
A drive circuit for an LED agricultural fluorescent lamp Download PDFInfo
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- CN203661367U CN203661367U CN201320859444.1U CN201320859444U CN203661367U CN 203661367 U CN203661367 U CN 203661367U CN 201320859444 U CN201320859444 U CN 201320859444U CN 203661367 U CN203661367 U CN 203661367U
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Abstract
A drive circuit for an LED agricultural fluorescent lamp belongs to the field of illumination. A rectification circuit and an LED light emitting module which is positioned on an LED circuit board and which is connected with a drive circuit are comprised. A maximum peak value current restriction circuit is arranged between the rectification circuit and the LED light emitting circuit. A direct current output terminal of the rectification circuit is in electric connection with the LED light emitting module through the maximum peak value current restriction circuit. The rectification circuit, the maximum peak value current restriction circuit and the LED light emitting module are all arranged on the LED circuit board so as to form an LED circuit board structure in which the drive circuit and the LED light emitting module are integrated. According to the LED circuit board structure, a complex drive power supply in an original LED fluorescent lamp is simplified; a structural design which integrates a power supply and a light source is adopted; currents output by the drive power supply are controlled through a constant current diode; the overall working life of LED lamps is raised; the manufacturing and usage costs are reduced; the enhancing of competitiveness of LED lamp relative to traditional lamps is facilitated; and the drive circuit for the LED agricultural fluorescent lamp of the utility model can be widely applied to the field of LED fluorescent lamp design and manufacturing.
Description
Technical field
The utility model belongs to field of illuminating device, relates in particular to a kind of for agriculture LED daylight lamp fixture.
Background technology
Compare conventional light source, LED light source is obvious in ten parts of the advantages of agriculture lighting field.
LED light source has that light efficiency is high, low, the plurality of advantages such as volume is little, the life-span is long of generating heat.
In actual design, manufacture and use procedure, the scheme of the driving power that LED light fixture adopts, all has very large impact volume, manufacturing cost and the useful life etc. on LED light fixture.
The driving power scheme of main flow LED fluorescent lamp has following several in the market:
1, isolation circuit of reversed excitation: utilize circuit of reversed excitation, produce DC level by transformer at secondary, then by optocoupler, the ripple of this level is fed back to former limit, thereby self-excitation is stable.This type of circuit meets safety and assert requirement, and output constant current precision is better, and energy conversion efficiency is higher.But due to needs optocoupler and secondary constant-current control circuit, cause its system complex, volume is large, and cost is high, also wants transformer, cause the increase of LED light fixture weight and volume.
2, application-specific integrated circuit drive scheme: need to adopt special integrated circuit modules, its periphery also will add supporting with it resistance, electric capacity, and manufacturing cost is higher, is unfavorable for the popularization of agricultural LED light fixture.
3, resistance-capacitance depressurization band current-limiting resistance scheme: utilize the impedance of electric capacity under exchanging to carry out limiting input current, power to LED thereby obtain DC level.This scheme type of drive is simple in structure, with low cost, but its output current can change along with the fluctuation of line voltage, and current stability is poor, cannot accomplish constant current control, unfavorable to ensureing the useful life of LED luminescent device.
Utility model content
Technical problem to be solved in the utility model is to provide a kind of drive circuit of LED agricultural fluorescent lamp, it has simplified driving power complicated in original LED daylight lamp fixture, adopt power supply and the integrated structural design of light source, adopt the output current of current regulator diode control driving power, improve the overall work life-span of LED light fixture, reduce manufacturing cost and use cost, contributed to improve the competitiveness of LED agricultural lamp and conventional lamp.
The technical solution of the utility model is: the drive circuit that a kind of LED agricultural fluorescent lamp is provided, on comprising rectification circuit and being positioned at LED wiring board and the LED light emitting module being connected with drive circuit, it is characterized in that: between described rectification circuit and LED light emitting module, a peak inrush current limiting circuit is set; Described peak inrush current limiting circuit is serially connected between described rectification circuit and LED light emitting module; The DC output end of described rectification circuit, is electrically connected with described LED light emitting module through peak inrush current limiting circuit; Rectification circuit, peak inrush current limiting circuit and LED light emitting module described in it, be all arranged on described LED wiring board, forms drive circuit and the integrated LED circuit board structure of LED light emitting module.
Peak inrush current limiting circuit described in it is current regulator diode current-limiting circuit.
The series connection of described current regulator diode current-limiting circuit is arranged between the DC output end and described LED light emitting module of described rectification circuit.
Concrete, described current regulator diode current-limiting circuit at least comprises a current regulator diode.
Further, described current regulator diode current-limiting circuit is made up of the first current regulator diode and the second current regulator diode; The corresponding connection of positive pole of the positive pole of described first, second current regulator diode and described rectification circuit DC output end; The corresponding connection of positive terminal of the negative pole of described first, second current regulator diode and described LED light emitting module, the corresponding connection of negative pole of the negative pole end of described LED light emitting module and described rectification circuit DC output end.
Rectification circuit described in it is rectifier circuit, and described rectifier circuit comprises rectifier bridge IC circuit, filter capacitor and current-limiting resistance; The ac input end of rectifier bridge IC circuit connection corresponding to AC power described in it, described filter capacitor and current-limiting resistance, be connected in parallel with the DC output end of rectifier bridge IC circuit, forms the positive and negative electrode of described rectification circuit DC output end.
LED light emitting module described in it is made up of multiple LED luminescent devices, after described two one group ground parallel connection of multiple LED luminescent devices, respectively organizes between LED luminescent device and is connected in series successively; The positive pole of described rectification circuit DC output end is through described peak inrush current limiting circuit, organizes the corresponding connection of positive pole of LED luminescent device with head; The negative pole of end group LED luminescent device and the corresponding connection of negative pole of described rectification circuit DC output end.
Further, described rectification circuit and peak inrush current limiting circuit are arranged on one end of described LED wiring board, or are separately positioned on the two ends of described LED wiring board; Described LED light emitting module is along the described uniform setting of LED wiring board.
Compared with the prior art, the utility model has the advantages that:
1. adopt current regulator diode as current limiting device, can be in very wide input voltage range, the current stabilization of proof load loop (being LED luminescent device), so guarantee LED fluorescent lamp go out light quality and stability;
2. utilize the electric current negative temperature characteristic of current regulator diode, for LED luminescent device provides temperature-current protection, improve the working life of total system
3. whole driving power part is arranged on LED wiring board, and power supply and light source integral structure arrange, and make the overall volume of LED fluorescent lamp little, with low cost, be convenient to batch production, can greatly reduce the manufacturing cost of LED fluorescent lamp, contribute to agricultural popularizing with LED fluorescent lamp.
Accompanying drawing explanation
Fig. 1 is the circuit structure schematic block diagram of the utility model drive circuit;
Fig. 2 is the line map of this drive circuit embodiment.
In figure, 1 is rectification circuit, and 2 is LED light emitting module, and 3 is peak inrush current limiting circuit, and 4 is LED wiring board.
Embodiment
Below in conjunction with drawings and Examples, the utility model is described further.
In Fig. 1, the technical solution of the utility model provides the drive circuit of a kind of LED agricultural fluorescent lamp, on comprising rectification circuit and being positioned at LED wiring board and the LED light emitting module being connected with drive circuit.
It arranges a peak inrush current limiting circuit 3 between described rectification circuit 1 and LED light emitting module 2; Its peak inrush current limiting circuit is serially connected between described rectification circuit and LED light emitting module; The DC output end of described rectification circuit, is electrically connected with described LED light emitting module through peak inrush current limiting circuit.
Peak inrush current limiting circuit described in it is current regulator diode current-limiting circuit.
The series connection of described current regulator diode current-limiting circuit is arranged between the DC output end and described LED light emitting module of described rectification circuit.
Described current regulator diode current-limiting circuit at least comprises a current regulator diode.
Rectification circuit, peak inrush current limiting circuit and LED light emitting module described in it, be all arranged on described LED wiring board 4, forms drive circuit and the integrated LED circuit board structure of LED light emitting module.
Described rectification circuit and peak inrush current limiting circuit are arranged on one end of described LED wiring board, or are separately positioned on the two ends of described LED wiring board; Described LED light emitting module is along the described uniform setting of LED wiring board.
In Fig. 2, the technical program adopts the integrated driving power power supply plan of AC.
Its rectification circuit is rectifier circuit, and described rectifier circuit comprises rectifier bridge IC circuit, filter capacitor C and current-limiting resistance R; The ac input end of rectifier bridge IC circuit connection corresponding to AC power described in it, described filter capacitor C and current-limiting resistance R, be connected in parallel with the DC output end of rectifier bridge IC circuit, forms the positive and negative electrode of described rectification circuit DC output end.
Rectifier bridge is that even number (two or four) rectifier diode is enclosed in to the bridge rectification device of composition together, and Main Function is that alternating current is converted to direct current, namely rectification, and rectifier bridge hence obtains one's name.
In the technical program, rectifier bridge IC can adopt four conventional end rectifier bridge integrated chip circuit, as QL52～QL61 series, PM104M or BR300 series etc., in the LED light emitting module that its concrete power connects to it, total number of LED luminescent device (being gross power) is relevant, specifically can consult the product manual of rectifier bridge and determine.
Its LED light emitting module is made up of multiple LED luminescent devices, one group of every two LED luminescent device in multiple LED luminescent devices (in figure take LED1, LED2 as example) after parallel connection, respectively organize between LED luminescent device and be connected in series successively again; The positive pole of rectification circuit DC output end is through the first current regulator diode HLD1 and the second current regulator diode HLD2, organizes the corresponding connection of positive pole of LED luminescent device with head; The negative pole of end group LED luminescent device and the corresponding connection of negative pole of described rectification circuit DC output end.
In the present embodiment, current regulator diode current-limiting circuit is made up of the first current regulator diode HLD1 and the second current regulator diode HLD2; The corresponding connection of positive pole of the positive pole of first, second current regulator diode and rectification circuit DC output end; The corresponding connection of positive terminal of the negative pole of first, second current regulator diode and described LED light emitting module (in figure shown in dotted line frame), the corresponding connection of negative pole of the negative pole end of described LED light emitting module and described rectification circuit DC output end.
As shown in the figure, after the first current regulator diode HLD1 and the second current regulator diode HLD2 parallel connection, be connected in series between the positive pole of anodal and first group LED luminescent device of rectification circuit DC output end.
When actual enforcement, the optional S-1X3T series of concrete model, RCDX03 series or the 2DHXXXX series of products of current regulator diode.
Current regulator diode CRD (Current Regulator Diodes) is a kind of device that stabling current can be provided when the mains voltage variations for LED or other devices, it is equivalent to the limiting circuit of a constant-current source or peak inrush current, even if there is the situation that supply voltage power supply instability or load resistance alter a great deal, can guarantee that supply current is stable.It is very simple that this device has peripheral circuit, uses the features such as extremely convenient, is particularly useful for LED illumination.
The advantage of the technical program is:
One, the withstand voltage scope of current regulator diode is wider, adopts after this scheme, can be in very wide input voltage range, and the current stabilization in proof load loop.
Two, current regulator diode has electric current negative temperature characteristic, along with the increase electric current of whole system temperature can reduce, has well protected LED luminescent device, contributes to improve the working life of total system.
Three, whole driving power part is arranged on LED wiring board, adopt power supply and the integrated structural design of light source, make the overall volume of LED fluorescent lamp little, with low cost, be convenient to batch production, can greatly reduce the manufacturing cost of LED fluorescent lamp, contribute to agricultural popularizing with LED fluorescent lamp.
Because the utility model has been simplified driving power complicated in original LED daylight lamp fixture, adopt the integrated driving power power supply plan of AC and adopt power supply and the integrated structural design of light source, extremely carry out the output current of management and control driving power processed with constant current two, it is a kind of type of drive that is applicable to high voltage-small current, it has improved the overall work life-span of LED light fixture, can greatly reduce the manufacturing cost and use cost of LED fluorescent lamp, contribute to agricultural popularizing with LED fluorescent lamp.
The utility model can be widely used in the Design and manufacture field of LED fluorescent lamp.
Claims (8)
1. a drive circuit for LED agricultural fluorescent lamp, on comprising rectification circuit and being positioned at LED wiring board and the LED light emitting module being connected with drive circuit, is characterized in that:
Between described rectification circuit and LED light emitting module, a peak inrush current limiting circuit is set;
Described peak inrush current limiting circuit is serially connected between described rectification circuit and LED light emitting module;
The DC output end of described rectification circuit, is electrically connected with described LED light emitting module through peak inrush current limiting circuit;
Rectification circuit, peak inrush current limiting circuit and LED light emitting module described in it, be all arranged on described LED wiring board, forms drive circuit and the integrated LED circuit board structure of LED light emitting module.
2. according to the drive circuit of LED agricultural fluorescent lamp claimed in claim 1, it is characterized in that described peak inrush current limiting circuit is current regulator diode current-limiting circuit.
3. according to the drive circuit of LED claimed in claim 2 agricultural fluorescent lamp, it is characterized in that described current regulator diode current-limiting circuit series connection is arranged between the DC output end and described LED light emitting module of described rectification circuit.
4. according to the drive circuit of LED agricultural fluorescent lamp claimed in claim 2, it is characterized in that described current regulator diode current-limiting circuit at least comprises a current regulator diode.
5. according to the drive circuit of the LED agricultural fluorescent lamp described in claim 2,3 or 4, it is characterized in that described current regulator diode current-limiting circuit is made up of the first current regulator diode and the second current regulator diode; The corresponding connection of positive pole of the positive pole of described first, second current regulator diode and described rectification circuit DC output end; The corresponding connection of positive terminal of the negative pole of described first, second current regulator diode and described LED light emitting module, the corresponding connection of negative pole of the negative pole end of described LED light emitting module and described rectification circuit DC output end.
6. according to the drive circuit of LED agricultural fluorescent lamp claimed in claim 1, it is characterized in that described rectification circuit is rectifier circuit, described rectifier circuit comprises rectifier bridge IC circuit, filter capacitor and current-limiting resistance; The ac input end of rectifier bridge IC circuit connection corresponding to AC power described in it, described filter capacitor and current-limiting resistance, be connected in parallel with the DC output end of rectifier bridge IC circuit, forms the positive and negative electrode of described rectification circuit DC output end.
7. according to the drive circuit of LED agricultural fluorescent lamp claimed in claim 1, it is characterized in that described LED light emitting module is made up of multiple LED luminescent devices, after described two one group ground parallel connection of multiple LED luminescent devices, respectively organize between LED luminescent device and be connected in series successively again; The positive pole of described rectification circuit DC output end is through described peak inrush current limiting circuit, organizes the corresponding connection of positive pole of LED luminescent device with head; The negative pole of end group LED luminescent device and the corresponding connection of negative pole of described rectification circuit DC output end.
8. according to the drive circuit of LED agricultural fluorescent lamp claimed in claim 1, it is characterized in that described rectification circuit and peak inrush current limiting circuit are arranged on one end of described LED wiring board, or be separately positioned on the two ends of described LED wiring board; Described LED light emitting module is along the described uniform setting of LED wiring board.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320859444.1U CN203661367U (en) | 2013-12-24 | 2013-12-24 | A drive circuit for an LED agricultural fluorescent lamp |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320859444.1U CN203661367U (en) | 2013-12-24 | 2013-12-24 | A drive circuit for an LED agricultural fluorescent lamp |
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| Publication Number | Publication Date |
|---|---|
| CN203661367U true CN203661367U (en) | 2014-06-18 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320859444.1U Expired - Fee Related CN203661367U (en) | 2013-12-24 | 2013-12-24 | A drive circuit for an LED agricultural fluorescent lamp |
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| Country | Link |
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| CN (1) | CN203661367U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105472818A (en) * | 2016-01-13 | 2016-04-06 | 黎时勇 | LED lighting circuit |
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2013
- 2013-12-24 CN CN201320859444.1U patent/CN203661367U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105472818A (en) * | 2016-01-13 | 2016-04-06 | 黎时勇 | LED lighting circuit |
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140618 Termination date: 20161224 |
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| CF01 | Termination of patent right due to non-payment of annual fee |