CN102510620A - LED (light-emitting diode) light source module - Google Patents
LED (light-emitting diode) light source module Download PDFInfo
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- CN102510620A CN102510620A CN2011103336608A CN201110333660A CN102510620A CN 102510620 A CN102510620 A CN 102510620A CN 2011103336608 A CN2011103336608 A CN 2011103336608A CN 201110333660 A CN201110333660 A CN 201110333660A CN 102510620 A CN102510620 A CN 102510620A
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- led
- light source
- source module
- led light
- led chip
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Abstract
The invention discloses an LED (light-emitting diode) light source module which comprises an LED chipset and an overcurrent protection circuit module, wherein the overcurrent protection circuit module comprises a current sampling resistor, a voltage regulation triode, a bias resistor, an overcurrent control triode and a reverse overvoltage protection diode; the LED chipset comprises a plurality of LED chips which are in serial connection; and the LED chips are formed by connecting a plurality of LED lamps in series. Each constituent component of the overcurrent protection circuit module is matched with the internal structure of the LED chipset of the LED light source module provided by the invention, so that not only can the LED light source module operate stably, and the protection function is complete, but also the cost is low, and the LED light source module is wide in application and popularization value; and simultaneously, the heat radiation performance of the LED light source module is improved further by virtue of a heat radiation island arranged on the LED light source module.
Description
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Technical field
The present invention relates to the LED lighting technical field, relate in particular to a kind of led light source module with overcurrent protection function.
Background technology
Led light source has advantages such as environmental protection, energy-conservation, long service life, make its in modern times lighting field increasingly extensive application is arranged, especially be fit to be used in office, parking lot, the public place of the long-time illumination of needs such as (machine) chamber, subway, tunnel of waiting.
And the led light source module of early stage formation LED light pipe, its employed led chip group is in order to reduce chip operation electric current I under the identical bias
FDiffer bigger, force the led chip group can only adopt " earlier string after also " mode to connect that (structure that is the led chip group mainly is made up of a plurality of led chips that are connected in parallel; And each led chip is to be in series by a plurality of LED lamps).But there is following shortcoming in this connected mode:
1. when in series connection branch road (being one of them led chip) wherein during a certain LED lamp open circuit, tens of LED lamps on the whole series arm all can not be worked.
2. also can increase the operating current of led light source module, thereby make the LED lamp operating current I of other series arms (being other led chip)
FExceed safe range, make the LED lamp of other series arms can't operate as normal, finally cause the LED light pipe that utilizes this led light source module to constitute the large tracts of land blackening to occur.
Summary of the invention
In order to solve the technical problem that prior art exists; The object of the present invention is to provide and a kind ofly can avoid occurring causing this led chip cisco unity malfunction and influencing other led chip operate as normal, when constituting the LED light pipe, can make the LED light pipe led light source module of large tracts of land blackening situation occur because of a certain LED lamp open circuit of a led chip wherein.
To achieve these goals, the technical scheme that adopted of the present invention is specific as follows:
A kind of led light source module comprises led chip group and current foldback circuit module; Wherein, said current foldback circuit module comprises current sampling resistor, voltage adjustment triode, and biasing resistor is crossed current control triode and reverse overvoltage protection diode; The corresponding respectively positive and negative polarities that electrically connect the led chip group of the positive and negative polarities of reverse overvoltage protection diode; Biasing resistor one end electrically connects the positive pole of led chip group, and the other end electrically connects the base stage and the collector electrode of crossing the current control triode of voltage adjustment triode simultaneously; The collector electrode of voltage adjustment triode electrically connects the negative pole of led chip group, and the emitter of voltage adjustment triode electrically connected the current control transistor emitter through current sampling resistor after electrically connecting the current control transistor base again; The positive pole of the just very led light source module of led chip group, and electrically connect the driving power of a led light source module; The emission of crossing the current control triode is the negative pole of led light source module very, and electrical ground connection; Said led chip group comprises a plurality of LED coupled in series chips; And said led chip is formed in parallel by a plurality of LED lamps.
Operation principle of the present invention is following:
At first; Operating current according to led chip and led chip group; Select the resistance of current sampling resistor, make emitter junction voltage that normal condition descended the current control triode between 0.42 volt to 0.52 volt, end or the lightly conducting state thereby the current control triode is in;
Secondly; Size according to the current amplification factor of the operating current of led light source module and voltage adjustment triode; Confirm the resistance of biasing resistor; Make the voltage adjustment triode under the normal condition be in saturated or critical saturated state, make between the power consumption of over-current detection sensitivity and current foldback circuit module and obtain optimum balance.
When causing the operating current of led light source module to increase when a certain LED lamp open circuit of a led chip wherein, the electric current that then flows through current sampling resistor can increase, thereby causes the base voltage of current control triode to raise; Finally forced the conducting of current control triode; At this moment, the collector current of crossing the current control triode increases, thereby has reduced the base current of voltage adjustment triode; Make voltage adjustment triode get into magnifying state by critical saturation condition; The voltage that voltage is adjusted between the collector and emitter of triode increases, thereby has limited the increase of the operating current of led light source module, and the LED lamp operating current of each led chip is limited in the safe range; Not only guaranteed the operate as normal of the led chip of the LED lamp that appearance is opened a way; And do not influence the operate as normal of other led chips, when utilizing the led light source module to constitute the LED light pipe, just the large tracts of land blackening can not appear.
And when the driving power of led light source module when the driving voltage of the positive pole input of led light source module raises, the operating current of led light source module is increased.In this case; Operation principle when the operation principle of current foldback circuit module causes the operating current of led light source module to increase with above-mentioned a certain LED lamp open circuit because of a led chip wherein is identical; The voltage increment of the positive pole of led light source module has just been born by the collector and emitter of voltage adjustment triode jointly at this moment; Thereby limited the increase of the operating current of led light source module, the LED lamp operating current of each led chip is limited in the safe range.
Preferably, said led chip group comprises 11 LED coupled in series chips; And said led chip is formed in parallel by 6 LED lamps.
Preferably, said led chip group comprises 12 LED coupled in series chips; And said led chip is formed in parallel by 5 LED lamps.
Preferably, said led chip group comprises 10 LED coupled in series chips; And said led chip is formed in parallel by 6 LED lamps.
Be the sensitivity of the over-current detection that improves the current foldback circuit module, the β value of the β value of said voltage adjustment triode and mistake current control triode is all greater than 150.
For reducing the power consumption of current foldback circuit module, said voltage adjustment triode is a NPN type triode.
In order to obtain better heat dispersion, also be provided with a heat radiation island in the said led light source module.。
For the ease of constituting the LED light pipe, the length of said led light source module is 280～284mm.
Preferably, the power of said led light source module is 4W.
Need to prove, can adopt 2～5 led light source modules of the present invention to constitute the LED light pipe of 60cm (8W), 90cm (12W), 120cm (16W), 150cm four kinds of specifications such as (20W) through parallel connection (being suitable for the isolation drive mode) or connection in series-parallel (being suitable for non-isolation drive mode).
Compared with prior art, the present invention has produced following beneficial effect:
The led chip group internal structure of led light source module of the present invention cooperates each building block of current foldback circuit module, not only makes led light source module working stability, and defencive function is perfect, and with low cost, has a wide range of applications and promotional value; Simultaneously, the heat dispersion of led light source module has further been improved on the heat radiation island of led light source module setting.
Below in conjunction with accompanying drawing and embodiment the present invention is done further description.
Description of drawings
Fig. 1 is a more preferably embodiment electrical block diagram of the present invention.
Embodiment
As shown in Figure 1, the present invention mainly comprises led chip group and current foldback circuit module; Wherein, said current foldback circuit module comprises current sampling resistor R1, voltage adjustment triode T1, and biasing resistor R2 crosses current control triode T2 and reverse overvoltage protection diode D1; The corresponding respectively positive and negative polarities that electrically connect the led chip group of the positive and negative polarities of reverse overvoltage protection diode D1; Biasing resistor R2 one end electrically connects the positive pole of led chip group, and the other end electrically connects the base stage and the collector electrode of crossing current control triode T2 of voltage adjustment triode T1 simultaneously; The collector electrode of voltage adjustment triode T1 electrically connects the negative pole of led chip group, and the emitter of voltage adjustment triode T1 electrically connected the emitter that electrically connected current control triode T2 after the base stage of current control triode T2 again through current sampling resistor R1; The positive pole of the just very led light source module of led chip group, and electrically connect the driving power VDD of a led light source module; The emission of crossing current control triode T2 is the negative pole of led light source module very, and electrical ground connection; Said led chip group comprises a plurality of LED coupled in series chip A; And said led chip A is formed in parallel by a plurality of LED lamp B.
Operation principle of the present invention is following:
At first; Operating current according to led chip A and led chip group; Select the resistance of current sampling resistor R1, make emitter junction voltage that normal condition descended current control triode T2 between 0.42 volt to 0.52 volt, end or the lightly conducting state thereby current control triode T2 is in;
Secondly; Size according to the current amplification factor of the operating current of led light source module and voltage adjustment triode T1; Confirm the resistance of biasing resistor R2; Make the voltage adjustment triode T1 under the normal condition be in saturated or critical saturated state, make between the power consumption of over-current detection sensitivity and current foldback circuit module and obtain optimum balance.
When causing the operating current of led light source module to increase when a certain LED lamp B open circuit of a led chip A wherein, the electric current that then flows through current sampling resistor R1 can increase, thereby causes the base voltage of current control triode T2 to raise; Finally forced current control triode T2 conducting; At this moment, the collector current of crossing current control triode T2 increases, thereby has reduced the base current of voltage adjustment triode T1; Make voltage adjustment triode T1 get into magnifying state by critical saturation condition; The voltage that voltage is adjusted between the collector and emitter of triode T1 increases, thereby has limited the increase of the operating current of led light source module, and the LED lamp B operating current of each led chip A is limited in the safe range; Not only guaranteed the operate as normal of the led chip A of the LED lamp B that appearance is opened a way; And do not influence the operate as normal of other led chips A, when utilizing the led light source module to constitute the LED light pipe, just the large tracts of land blackening can not appear.
And when the driving power VDD of led light source module when the driving voltage of the positive pole input of led light source module raises, the operating current of led light source module is increased.In this case; Operation principle when the operation principle of current foldback circuit module causes the operating current of led light source module to increase with above-mentioned a certain LED lamp B open circuit because of a led chip A wherein is identical; The voltage increment of the positive pole of led light source module has just been born by the collector and emitter of voltage adjustment triode T1 jointly at this moment; Thereby limited the increase of the operating current of led light source module, the LED lamp B operating current of each led chip A is limited in the safe range.
Preferably, as shown in Figure 1, said led chip group comprises 11 LED coupled in series chip A; And said led chip A is formed in parallel by 6 LED lamp B.
Preferably, said led chip group comprises 12 LED coupled in series chip A; And said led chip A is formed in parallel by 5 LED lamp B.
Preferably, said led chip group comprises 10 LED coupled in series chip A; And said led chip A is formed in parallel by 6 LED lamp B.
Be the sensitivity of the over-current detection that improves the current foldback circuit module, the β value of the β value of said voltage adjustment triode T1 and mistake current control triode T2 is all greater than 150.
For reducing the power consumption of current foldback circuit module, said voltage adjustment triode T1 is a NPN type triode.
In order to obtain better heat dispersion, also be provided with a heat radiation island (figure does not show) in the said led light source module.
For the ease of constituting the LED light pipe, the length of said led light source module is 280～284mm.
Preferably, the power of said led light source module is 4W.
Need to prove, can adopt 2～5 led light source modules of the present invention to constitute the LED light pipe of 60cm (8W), 90cm (12W), 120cm (16W), 150cm four kinds of specifications such as (20W) through parallel connection (being suitable for the isolation drive mode) or connection in series-parallel (being suitable for non-isolation drive mode).
For a person skilled in the art, can make other various corresponding changes and distortion, and these all changes and distortion should belong within the protection range of claim of the present invention all according to the technical scheme and the design of above description.
Claims (9)
1. a led light source module comprises the led chip group, it is characterized in that: also comprise a current foldback circuit module; Said current foldback circuit module comprises current sampling resistor, voltage adjustment triode, and biasing resistor is crossed current control triode and reverse overvoltage protection diode; The corresponding respectively positive and negative polarities that electrically connect the led chip group of the positive and negative polarities of reverse overvoltage protection diode; Biasing resistor one end electrically connects the positive pole of led chip group, and the other end electrically connects the base stage and the collector electrode of crossing the current control triode of voltage adjustment triode simultaneously; The collector electrode of voltage adjustment triode electrically connects the negative pole of led chip group, and the emitter of voltage adjustment triode electrically connected the current control transistor emitter through current sampling resistor after electrically connecting the current control transistor base again; The positive pole of the just very led light source module of led chip group, and electrically connect the driving power of a led light source module; The emission of crossing the current control triode is the negative pole of led light source module very, and electrical ground connection; Said led chip group comprises a plurality of LED coupled in series chips; And said led chip is formed in parallel by a plurality of LED lamps.
2. led light source module as claimed in claim 1 is characterized in that: said led chip group comprises 11 LED coupled in series chips; And said led chip is formed in parallel by 6 LED lamps.
3. led light source module as claimed in claim 1 is characterized in that: said led chip group comprises 12 LED coupled in series chips; And said led chip is formed in parallel by 5 LED lamps.
4. led light source module as claimed in claim 1 is characterized in that: said led chip group comprises 10 LED coupled in series chips; And said led chip is formed in parallel by 6 LED lamps.
5. led light source module as claimed in claim 1 is characterized in that: the β value of the β value of said voltage adjustment triode and mistake current control triode is all greater than 150.
6. led light source module as claimed in claim 5 is characterized in that: said voltage adjustment triode is a NPN type triode.
7. like any one described led light source module of claim 1-6, it is characterized in that: also be provided with a heat radiation island in the said led light source module.
8. led light source module as claimed in claim 7 is characterized in that: the length of said led light source module is 280～284mm.
9. led light source module as claimed in claim 8 is characterized in that: the power of said led light source module is 4W.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011103336608A CN102510620A (en) | 2011-10-28 | 2011-10-28 | LED (light-emitting diode) light source module |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011103336608A CN102510620A (en) | 2011-10-28 | 2011-10-28 | LED (light-emitting diode) light source module |
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| Publication Number | Publication Date |
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| CN102510620A true CN102510620A (en) | 2012-06-20 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011103336608A Pending CN102510620A (en) | 2011-10-28 | 2011-10-28 | LED (light-emitting diode) light source module |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107170879A (en) * | 2017-05-31 | 2017-09-15 | 天下知光科技（深圳）有限公司 | A kind of large area flip LED area source piece and its bonder |
| CN110360529A (en) * | 2019-08-01 | 2019-10-22 | 浙江阳光美加照明有限公司 | A kind of connection structure of non-isolated driving power and LED light source board |
| CN113448074A (en) * | 2020-03-25 | 2021-09-28 | 北京威斯顿亚太光电仪器有限公司 | Illumination light source of disposable hard tube mirror |
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| CN201599589U (en) * | 2009-12-04 | 2010-10-06 | 南通纺织职业技术学院 | LED fluorescent lamp |
| JP2010258382A (en) * | 2009-04-28 | 2010-11-11 | Sharp Corp | Light emitting device, and lighting system |
| KR101005199B1 (en) * | 2010-09-02 | 2010-12-31 | (주)상지기술 | Led protection device |
| CN102098826A (en) * | 2009-12-10 | 2011-06-15 | 冠捷投资有限公司 | Light emitting diode light source driving circuit |
| CN201892179U (en) * | 2010-11-04 | 2011-07-06 | 叶培生 | LED light source module with overcurrent protection function |
| CN102149233A (en) * | 2010-02-10 | 2011-08-10 | 辽宁宝林集团节能科技有限公司 | LED (Light Emitting Device) light source control device |
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Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| JP2010258382A (en) * | 2009-04-28 | 2010-11-11 | Sharp Corp | Light emitting device, and lighting system |
| CN201599589U (en) * | 2009-12-04 | 2010-10-06 | 南通纺织职业技术学院 | LED fluorescent lamp |
| CN102098826A (en) * | 2009-12-10 | 2011-06-15 | 冠捷投资有限公司 | Light emitting diode light source driving circuit |
| CN102149233A (en) * | 2010-02-10 | 2011-08-10 | 辽宁宝林集团节能科技有限公司 | LED (Light Emitting Device) light source control device |
| KR101005199B1 (en) * | 2010-09-02 | 2010-12-31 | (주)상지기술 | Led protection device |
| CN201892179U (en) * | 2010-11-04 | 2011-07-06 | 叶培生 | LED light source module with overcurrent protection function |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107170879A (en) * | 2017-05-31 | 2017-09-15 | 天下知光科技（深圳）有限公司 | A kind of large area flip LED area source piece and its bonder |
| CN107170879B (en) * | 2017-05-31 | 2019-10-25 | 天下知光科技（深圳）有限公司 | A kind of large area flip LED area source piece and its bonder |
| CN110360529A (en) * | 2019-08-01 | 2019-10-22 | 浙江阳光美加照明有限公司 | A kind of connection structure of non-isolated driving power and LED light source board |
| CN110360529B (en) * | 2019-08-01 | 2024-04-12 | 浙江阳光美加照明有限公司 | Connection structure of non-isolated driving power supply and LED light source plate |
| CN113448074A (en) * | 2020-03-25 | 2021-09-28 | 北京威斯顿亚太光电仪器有限公司 | Illumination light source of disposable hard tube mirror |
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Application publication date: 20120620 |