CN201892179U - LED light source module with overcurrent protection function - Google Patents
LED light source module with overcurrent protection function Download PDFInfo
- Publication number
- CN201892179U CN201892179U CN2010205946784U CN201020594678U CN201892179U CN 201892179 U CN201892179 U CN 201892179U CN 2010205946784 U CN2010205946784 U CN 2010205946784U CN 201020594678 U CN201020594678 U CN 201020594678U CN 201892179 U CN201892179 U CN 201892179U
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- Prior art keywords
- led lamp
- overcurrent protection
- triode
- lamp group
- led
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- Expired - Fee Related
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Abstract
An LED light source module with an overcurrent protection function consists of an LED lamp bank and an overcurrent protection circuit. A plurality of LED lamps are connected in parallel at first and then connected in series so as to form the LED lamp bank, the overcurrent protection circuit consists of a sampling resistor R1, a biasing resistor R2, a triode T1 and a triode T2, the biasing resistor R2 is connected to an anode of the LED lamp bank, the LED lamp bank is serially connected with the overcurrent protection circuit, namely a cathode of the LED lamp bank is connected with a collector electrode of the triode T1 in the overcurrent protection circuit, and an emitting electrode of the triode T2 in the overcurrent protection circuit is adopted as the cathode of the LED lamp bank. Further, more than five LED lamps are connected in parallel to form the LED lamp bank. Moreover, serially-connected level of the LED lamp bank is larger than or equal to five. The LED light source module with an overcurrent protection function is simple and reasonable in structure and stable in work, and has wide application and popularization values.
Description
Technical field
The utility model relates to LED illumination, especially a kind of led light source module with overcurrent protection.
Background technology
Led light source makes it at modern lighting field increasingly extensive application be arranged because of having advantages such as environmental protection, energy-conservation, long service life.
Led light source adopts the constant current power supply, and the LED serial or parallel connection is formed.Though simple in structure, cost is low, very flexible, when the voltage in the circuit raise or one of them LED short circuit after, can cause other LED in the circuit to work, cause perhaps that electric current increases in the circuit, thereby influence LED lamp service life.
Summary of the invention
The purpose of this utility model is to overcome the deficiencies in the prior art, and a kind of led light source module with overcurrent protection is provided.
The technical solution of the utility model is: a kind of led light source module with overcurrent protection, to form by LED lamp group, current foldback circuit, and LED lamp group is formed by connecting by the mode of plurality of LEDs lamp back in parallel earlier series connection; Current foldback circuit is made up of sample resistance R1, biasing resistor R2, four elements of triode T1, triode T2; Biasing resistor R2 connects the positive pole of LED lamp group; LED lamp group is connected with current foldback circuit, and promptly LED lamp group negative pole is taken over the colelctor electrode of the triode T1 in the stream holding circuit, and the emitter stage of the triode T2 in the current foldback circuit is as the negative pole of LED lamp group.
Further, the LED lamp number of described LED lamp group parallel connection is more than or equal to 5.
Further, the progression of described LED lamp group series connection is more than or equal to 5.
Operation principle of the present utility model is: according to and go here and there the operating current of LED lamp number and LED lamp, select the resistance of sample resistance R1, make that triode T2 emitter voltage less than 0.5 volt, and ends T2 under the normal condition between 0.42 volt to 0.46 volt; According to the size of the operating current and the triode T1 current amplification factor of led light source module, determine the resistance of biasing resistor R2, make triode T1 saturation conduction under the normal condition, promptly between over-current detection sensitivity and current foldback circuit power consumption, obtain optimum balance.When supply voltage rising or wherein a certain LED lamp short circuit, the electric current that then flows through sample resistance R1 increases, thereby make triode T2 conducting, electric current shunting to triode T1 base stage makes triode T1 enter the amplification region, makes the terminal voltage increment of led light source module be born by the C-E utmost point of triode T1, and when the module operating current increases, the C-E pole tension of triode T1 is increased, limited the increase of LED lamp current, the LED electric current is limited in the safe range.
When using the utility model, only need to get final product as normal led light source installation, under the normal condition, triode T2 ends, the T1 saturation conduction, when supply voltage rising or wherein a certain LED short circuit, the electric current that then flows through sample resistance R1 increases, thereby make triode T2 conducting,, and make triode T1 enter the amplification region the shunting of triode T1 base current, make a large amount of power of triode consumption, thereby entire circuit power is descended, limited the increase of LED electric current, the LED electric current is limited in the safe range.
The utility model is simple in structure, and rationally, working stability has a wide range of applications and promotional value.
Description of drawings
Accompanying drawing 1 is the utility model structural representation, also is that specification digest is with scheming.
The specific embodiment
Now give an example in conjunction with the accompanying drawings, the utility model is described further.
Embodiment:
LED lamp D1, D2, D3 ... after the parallel connection of per in order 6 the LED lamps of D60 totally 10 groups be composed in series LED lamp group; Current foldback circuit is made up of sample resistance R1, biasing resistor R2, four elements of triode T1, triode T2; Biasing resistor R2 connects the positive pole of LED lamp group; LED lamp group is connected with current foldback circuit, and promptly LED lamp group negative pole is taken over the colelctor electrode of the triode T1 in the stream holding circuit, and the emitter stage of the triode T2 in the current foldback circuit is as the negative pole of LED lamp group.
Claims (3)
1. the led light source module with overcurrent protection is made up of LED lamp group, current foldback circuit, it is characterized in that: LED lamp group is formed by connecting by the mode of plurality of LEDs lamp back in parallel earlier series connection; Current foldback circuit is made up of sample resistance R1, biasing resistor R2, four elements of triode T1, triode T2; Biasing resistor R2 connects the positive pole of LED lamp group; LED lamp group is connected with current foldback circuit, and promptly LED lamp group negative pole is taken over the colelctor electrode of the triode T1 in the stream holding circuit, and the emitter stage of the triode T2 in the current foldback circuit is as the negative pole of LED lamp group.
2. the led light source module with overcurrent protection according to claim 1 is characterized in that: the LED lamp number of described LED lamp group parallel connection is more than or equal to 5.
3. the led light source module with overcurrent protection according to claim 1 is characterized in that: the progression of described LED lamp group series connection is more than or equal to 5.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010205946784U CN201892179U (en) | 2010-11-04 | 2010-11-04 | LED light source module with overcurrent protection function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010205946784U CN201892179U (en) | 2010-11-04 | 2010-11-04 | LED light source module with overcurrent protection function |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201892179U true CN201892179U (en) | 2011-07-06 |
Family
ID=44221652
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010205946784U Expired - Fee Related CN201892179U (en) | 2010-11-04 | 2010-11-04 | LED light source module with overcurrent protection function |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201892179U (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102510620A (en) * | 2011-10-28 | 2012-06-20 | 周宏标 | LED (light-emitting diode) light source module |
| CN102695336A (en) * | 2012-05-22 | 2012-09-26 | 曹勇 | LED (light-emitting diode) lamp |
| CN102752912A (en) * | 2012-06-01 | 2012-10-24 | 台达电子企业管理（上海）有限公司 | Light-emitting diode (LED) driving circuit |
| CN103024973A (en) * | 2011-09-23 | 2013-04-03 | 海洋王（东莞）照明科技有限公司 | LED (Light-Emitting Diode) lamp and overcurrent protection circuit thereof |
| CN106714400A (en) * | 2015-08-10 | 2017-05-24 | 法雷奥电机设备公司 | Driving circuit for supplying constant current |
-
2010
- 2010-11-04 CN CN2010205946784U patent/CN201892179U/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103024973A (en) * | 2011-09-23 | 2013-04-03 | 海洋王（东莞）照明科技有限公司 | LED (Light-Emitting Diode) lamp and overcurrent protection circuit thereof |
| CN103024973B (en) * | 2011-09-23 | 2015-04-01 | 海洋王（东莞）照明科技有限公司 | LED (Light-Emitting Diode) lamp and overcurrent protection circuit thereof |
| CN102510620A (en) * | 2011-10-28 | 2012-06-20 | 周宏标 | LED (light-emitting diode) light source module |
| CN102695336A (en) * | 2012-05-22 | 2012-09-26 | 曹勇 | LED (light-emitting diode) lamp |
| CN102752912A (en) * | 2012-06-01 | 2012-10-24 | 台达电子企业管理（上海）有限公司 | Light-emitting diode (LED) driving circuit |
| CN102752912B (en) * | 2012-06-01 | 2015-11-25 | 台达电子企业管理（上海）有限公司 | A kind of LED drive circuit |
| CN106714400A (en) * | 2015-08-10 | 2017-05-24 | 法雷奥电机设备公司 | Driving circuit for supplying constant current |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: DONGGUAN ZHONGTANG DONGZHENG ELECTRONIC FACTORY Free format text: FORMER OWNER: YE PEISHENG Effective date: 20121211 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20121211 Address after: 523000 Guangdong province Dongguan City Chudo town Yuen Chung Road Industrial Area Patentee after: Dongguan City Hall East electronics factory Address before: 523000 Guangdong province Dongguan City Chudo town East electronics factory Patentee before: Ye Peisheng |
|
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110706 Termination date: 20131104 |