CN203632931U - Protection circuit for driving LED light source COB series combination with switching power supply - Google Patents
Protection circuit for driving LED light source COB series combination with switching power supply Download PDFInfo
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- CN203632931U CN203632931U CN201320800215.2U CN201320800215U CN203632931U CN 203632931 U CN203632931 U CN 203632931U CN 201320800215 U CN201320800215 U CN 201320800215U CN 203632931 U CN203632931 U CN 203632931U
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- light source
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Abstract
The utility model provides a protection circuit for driving LED light source COB series combination with a switching power supply. The protection circuit comprises an AC/DC converting circuit, a constant-current driving circuit, an output circuit, and an LED light source COB board. The AC/DC converting circuit is connected with the output circuit via the constant-current driving circuit. The output circuit comprises an output positive end and an output negative end. A plurality of LED light emitters are successively connected in series and are packaged in the LED light source COB board. The series branch of the LED light emitters is connected between the output positive end and the output negative end of the output circuit. A plurality of voltage-stabilizing diodes are also packaged in the LED light source COB board. The two ends of each LED light emitter are connected with a voltage-stabilizing diode in parallel. The cathode of the voltage-stabilizing diode is connected with the anode of a corresponding LED light emitter. The anode of the voltage-stabilizing diode is connected with the cathode of the corresponding LED light emitter. The protection circuit may effectively protect the LED light source, does not influence the use efficiency of a power supply, and has a low heat generation amount.
Description
Technical field
The utility model relates to LED light source field.
Background technology
LED light source has advantages of that high brightness, low-power consumption, life-span are long, and replacing gradually conventional light source becomes main lighting source.But; LED light source is easily hit current affects and burns out; existing LED light source is generally to protect by the mode that adopts metal-oxide-semiconductor secondary constant current or adopt resistance to be directly connected on lamp string, but such mode affects power supply service efficiency, and caloric value is large.
Utility model content
For above-mentioned prior art deficiency, the utility model technical issues that need to address are to provide a kind of power supply service efficiency, LED light source protective circuit that caloric value is little of not affecting.
For solving the problems of the technologies described above, the technical solution adopted in the utility model is: use Switching Power Supply driving LED light source COB tandem compound protective circuit, comprise AC/DC change-over circuit, constant-current drive circuit, output circuit and LED light source COB plate; AC/DC change-over circuit is connected with output circuit by constant-current drive circuit; Output circuit has output plus terminal and output negative terminal; In LED light source COB plate, be packaged with some LED luminous elements of series connection successively, the series arm of LED luminous element is connected between the output plus terminal and output negative terminal of output circuit; In LED light source COB plate, be also packaged with some voltage stabilizing didoes, the each voltage stabilizing didoe in parallel in each LED luminous element two ends, the anodic bonding of the negative electrode of voltage stabilizing didoe and corresponding LED luminous element, the anode of voltage stabilizing didoe connects with the negative electrode of corresponding LED luminous element.
Further technical scheme is that described constant-current drive circuit is PWM switching power circuit; This PWM switching power circuit comprises 6663L chip, and 6663L chip holds resistance network by input and is connected with AC/DC change-over circuit, and 6663L chip holds resistance network by output optocoupler and is connected with output circuit.
Preferably, the LED luminous element quantity of described LED light source COB plate is three.
More preferably, the rated power of described LED luminous element is 50W, and the rated current of described voltage stabilizing didoe is 33A.
Use Switching Power Supply driving LED light source COB tandem compound protective circuit of the present utility model can effectively be protected LED light source, can not affect power supply service efficiency, and caloric value is little.
Accompanying drawing explanation
Fig. 1 is the structural representation that the utility model uses Switching Power Supply driving LED light source COB tandem compound protective circuit.
Embodiment
Below in conjunction with the drawings and specific embodiments, the utility model is described in further detail.
As shown in Figure 1, use Switching Power Supply driving LED light source COB tandem compound protective circuit of the present utility model, comprises AC/DC change-over circuit 1, constant-current drive circuit 2, output circuit 3 and LED light source COB plate 4; AC/DC change-over circuit 1 is connected with output circuit 3 by constant-current drive circuit 2; Output circuit 3 has output plus terminal 31 and output negative terminal 32; In LED light source COB plate 4, be packaged with some LED luminous elements 41 of series connection successively, the series arm of LED luminous element 41 is connected between the output plus terminal 31 and output negative terminal 32 of output circuit 3; In LED light source COB plate 4, be also packaged with some voltage stabilizing didoes 42, each LED luminous element 41 each voltage stabilizing didoes 42 in parallel in two ends, the anodic bonding of the negative electrode of voltage stabilizing didoe 42 and corresponding LED luminous element 41, the anode of voltage stabilizing didoe 42 connects with the negative electrode of corresponding LED luminous element 41.Such structure can meet the requirement of anti-rush of current.
Particularly, described constant-current drive circuit 2 is PWM switching power circuit; This PWM switching power circuit comprises 6663L chip 21, and 6663L chip holds resistance network 22 by input and is connected with AC/DC change-over circuit 1, and 6663L chip 21 holds resistance network 23 by output optocoupler and is connected with output circuit 3.Such structure can effectively be suppressed Switching Power Supply high-frequency current ripple, owing to not adopting resistance protection, can not absorb the power of power supply, does not affect power-efficient.
In the present embodiment, LED luminous element 41 quantity of described LED light source COB plate 4 are three; The rated power of described LED luminous element 41 is 50W, and the rated current of described voltage stabilizing didoe 42 is 33A.When such structure makes single led luminous element 41 or circuit open circuit, voltage stabilizing didoe 42 upper voltage limits are lighted other two LED luminous elements 41 and are continued emergency, and have the ability of energy moment leakage 93.9A with interior thunder-strike current.
The foregoing is only preferred embodiment of the present utility model; not in order to limit the utility model; all within spirit of the present utility model and principle, any modification of doing, be equal to replacement, improvement etc., within all should being included in protection range of the present utility model.
Claims (4)
1. use Switching Power Supply driving LED light source COB tandem compound protective circuit, it is characterized in that: comprise AC/DC change-over circuit, constant-current drive circuit, output circuit and LED light source COB plate; AC/DC change-over circuit is connected with output circuit by constant-current drive circuit; Output circuit has output plus terminal and output negative terminal; In LED light source COB plate, be packaged with some LED luminous elements of series connection successively, the series arm of LED luminous element is connected between the output plus terminal and output negative terminal of output circuit; In LED light source COB plate, be also packaged with some voltage stabilizing didoes, the each voltage stabilizing didoe in parallel in each LED luminous element two ends, the anodic bonding of the negative electrode of voltage stabilizing didoe and corresponding LED luminous element, the anode of voltage stabilizing didoe connects with the negative electrode of corresponding LED luminous element.
2. use Switching Power Supply driving LED light source COB tandem compound protective circuit according to claim 1, is characterized in that: described constant-current drive circuit is PWM switching power circuit; This PWM switching power circuit comprises 6663L chip, and 6663L chip holds resistance network by input and is connected with AC/DC change-over circuit, and 6663L chip holds resistance network by output optocoupler and is connected with output circuit.
3. use Switching Power Supply driving LED light source COB tandem compound protective circuit according to claim 1, is characterized in that: the LED luminous element quantity of described LED light source COB plate is three.
4. use Switching Power Supply driving LED light source COB tandem compound protective circuit according to claim 3, is characterized in that: the rated power of described LED luminous element is 50W, and the rated current of described voltage stabilizing didoe is 33A.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320800215.2U CN203632931U (en) | 2013-12-05 | 2013-12-05 | Protection circuit for driving LED light source COB series combination with switching power supply |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320800215.2U CN203632931U (en) | 2013-12-05 | 2013-12-05 | Protection circuit for driving LED light source COB series combination with switching power supply |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203632931U true CN203632931U (en) | 2014-06-04 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320800215.2U Expired - Fee Related CN203632931U (en) | 2013-12-05 | 2013-12-05 | Protection circuit for driving LED light source COB series combination with switching power supply |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203632931U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104333958A (en) * | 2014-11-20 | 2015-02-04 | 中山市美耐特光电有限公司 | A lighting circuit and a light strip using the lighting circuit |
| CN105739031A (en) * | 2016-04-19 | 2016-07-06 | 武汉电信器件有限公司 | COB-based surface-mount laser diode interface matching apparatus |
-
2013
- 2013-12-05 CN CN201320800215.2U patent/CN203632931U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104333958A (en) * | 2014-11-20 | 2015-02-04 | 中山市美耐特光电有限公司 | A lighting circuit and a light strip using the lighting circuit |
| CN105739031A (en) * | 2016-04-19 | 2016-07-06 | 武汉电信器件有限公司 | COB-based surface-mount laser diode interface matching apparatus |
| CN105739031B (en) * | 2016-04-19 | 2017-11-03 | 武汉电信器件有限公司 | The laser diode Interface Matching device mounted based on COB |
| US10700488B2 (en) | 2016-04-19 | 2020-06-30 | Wuhan Telecommunication Devices Co., Ltd. | COB bonding laser diode interface mating device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140604 Termination date: 20201205 |