CN201718073U - Novel light emitting diode (LED) fluorescent lamp driving circuit - Google Patents
Novel light emitting diode (LED) fluorescent lamp driving circuit Download PDFInfo
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- CN201718073U CN201718073U CN2010201938473U CN201020193847U CN201718073U CN 201718073 U CN201718073 U CN 201718073U CN 2010201938473 U CN2010201938473 U CN 2010201938473U CN 201020193847 U CN201020193847 U CN 201020193847U CN 201718073 U CN201718073 U CN 201718073U
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- constant current
- led
- constant
- voltage stabilizing
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Abstract
The utility model discloses a novel light emitting diode (LED) fluorescent lamp driving circuit, which relates to the field of illumination and comprises a total constant current drive, a branch constant current drive and a voltage stabilizing diode, wherein the anode of the total constant current drive is connected with the cathode of the voltage stabilizing diode, the anode of the voltage stabilizing diode is connected with the cathode of the total constant current drive, the cathode of an LED string is connected with the anode of a branch constant current module, and the cathodes of all the branch constant current modules are connected with the cathode of the total constant current drive. The utility model solves the problem of nonuniform driving current when an LED array structure is adopted, takes a variety of system protection on the system, realizes small integration, does not need to greatly increase cost, reliably prolongs the service life of an LED lighting product, and improves the reliability of the product, thereby providing a very practical circuit structure.
Description
Technical field:
The utility model relates to lighting field, is specifically related to a kind of new LED fluorescent lamp drive circuit.
Background technology:
Existing LED fluorescent lamp adopts the few connected mode also of many strings more, carries out the total current constant-current driving then.But, make difference bigger after a plurality of series connection because the ESR of LED there are differences.Can't guarantee electric current uniformity between string and string when adopting this kind type of drive, thereby cause the inhomogeneous of brightness.Though can improve by means such as series resistance or LED apolegamys, it is very limited to improve effect, and is unfavorable for volume production.
The utility model content:
The purpose of this utility model provides a kind of Novel LED fluorescent lamp drive circuit, and it adds independently passive type constant flow module in each LED string, limits the electric current that flows through in each LED string.Solve electric current by the foreign current bypass simultaneously and cross problem definition; Adopt the second order constant current drive mode, at the topological structure (be step-down, boost or the buck constant current drive mode) that keeps original drive circuit simultaneously, every road series branch is carried out independently constant current control.Solved the drive current problem of non-uniform of using LED battle array structure; simultaneously system has been carried out kinds of protect; can realize that not only miniaturization is integrated; need not increase a lot of costs yet; also having increased reliability of products simultaneously in the life-span that has reliably prolonged the LED illuminating product, is a kind of very practical circuit structure.And this circuit structure and the compatible and mutual fusion of existing drive scheme, can not bring very big difficulty for the upgrading of product.
In order to solve the existing problem of background technology, the utility model is by the following technical solutions: it comprises total constant-current driving, branch's constant flow module (M module) and voltage stabilizing didoe (current bypass), the positive pole of constant-current driving is connected with the negative electrode of voltage stabilizing didoe, and the anode of voltage stabilizing didoe is connected with the negative pole of constant-current driving.The negative pole of LED string is connected with the positive pole of branch's constant flow module, and the negative pole of all branch's constant flow modules is connected with the negative pole of total constant-current driving.
The utlity model has following beneficial effect: solved the drive current problem of non-uniform of using LED battle array structure; simultaneously system has been carried out kinds of protect; can realize that not only miniaturization is integrated; need not increase a lot of costs yet; also having increased reliability of products simultaneously in the life-span that has reliably prolonged the LED illuminating product, is a kind of very practical circuit structure.And this circuit structure and the compatible and mutual fusion of existing drive scheme, can not bring very big difficulty for the upgrading of product.
Description of drawings:
Fig. 1 is a structural representation of the present utility model;
Fig. 2 is the structural representation of the utility model embodiment one;
Fig. 3 is the structural representation of the utility model embodiment two;
Fig. 4 is the structural representation of the utility model embodiment three.
Embodiment:
Referring to Fig. 1, this embodiment is by the following technical solutions: it comprises total constant-current driving, branch's constant flow module (M module) and voltage stabilizing didoe (current bypass), the positive pole of constant-current driving is connected with the negative electrode of voltage stabilizing didoe, and the anode of voltage stabilizing didoe is connected with the negative pole of constant-current driving.The negative pole of LED string is connected with the positive pole of branch's constant flow module, and the negative pole of all branch's constant flow modules is connected with the negative pole of total constant-current driving.
This embodiment has solved the drive current problem of non-uniform of using LED battle array structure; simultaneously system has been carried out kinds of protect; can realize that not only miniaturization is integrated; need not increase a lot of costs yet; also having increased reliability of products simultaneously in the life-span that has reliably prolonged the LED illuminating product, is a kind of very practical circuit structure.And this circuit structure and the compatible and mutual fusion of existing drive scheme, can not bring very big difficulty for the upgrading of product.
Embodiment two: referring to Fig. 2, be that with embodiment one difference it also comprises signal amplification circuit, signal amplification circuit is connected with sampling resistor, and signal amplification circuit outputs to total constant-current driving Enable Pin, and other composition is all identical with embodiment one with annexation.Play the autonomous function of turn-offing of overcurrent.
Embodiment three: referring to Fig. 3, also comprising logic OR and temperature sampling circuit with embodiment two differences with it, signal amplification circuit is connected with the logic OR input with temperature sampling circuit, logic OR output is connected with total constant current Enable Pin, and other composition is all identical with embodiment two with annexation.Play the autonomous function of turn-offing of overcurrent or excess temperature.
Claims (3)
1. Novel LED fluorescent lamp drive circuit, it is characterized in that it comprises total constant-current driving, branch's constant-current driving and voltage stabilizing didoe, the positive pole of total constant-current driving is connected with the negative electrode of voltage stabilizing didoe, the anode of voltage stabilizing didoe is connected with the negative pole of total constant-current driving, the negative pole of LED string is connected with the positive pole of branch's constant flow module, and the negative pole of all branch's constant flow modules is connected with the negative pole of total constant-current driving.
2. Novel LED fluorescent lamp drive circuit according to claim 1, it is characterized in that it also comprises signal amplification circuit and current sampling resistor, signal amplification circuit is connected with current sampling resistor, and signal amplification circuit output is connected with the Enable Pin of total constant-current driving.
3. Novel LED fluorescent lamp drive circuit according to claim 2, it is characterized in that it also comprises logic OR and temperature sampling circuit, signal amplification circuit is connected with the logic OR input with temperature sampling circuit, and logic OR output is connected with the Enable Pin of total constant-current driving.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010201938473U CN201718073U (en) | 2010-05-18 | 2010-05-18 | Novel light emitting diode (LED) fluorescent lamp driving circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010201938473U CN201718073U (en) | 2010-05-18 | 2010-05-18 | Novel light emitting diode (LED) fluorescent lamp driving circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201718073U true CN201718073U (en) | 2011-01-19 |
Family
ID=43464081
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010201938473U Expired - Fee Related CN201718073U (en) | 2010-05-18 | 2010-05-18 | Novel light emitting diode (LED) fluorescent lamp driving circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201718073U (en) |
-
2010
- 2010-05-18 CN CN2010201938473U patent/CN201718073U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110119 Termination date: 20120518 |