CN201014383Y - LED series connecting application protection circuit - Google Patents
LED series connecting application protection circuit Download PDFInfo
- Publication number
- CN201014383Y CN201014383Y CNU2007200955179U CN200720095517U CN201014383Y CN 201014383 Y CN201014383 Y CN 201014383Y CN U2007200955179 U CNU2007200955179 U CN U2007200955179U CN 200720095517 U CN200720095517 U CN 200720095517U CN 201014383 Y CN201014383 Y CN 201014383Y
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- China
- Prior art keywords
- led
- circuit
- current
- constant
- power supply
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B20/00—Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps
- Y02B20/30—Semiconductor lamps, e.g. solid state lamps [SSL] light emitting diodes [LED] or organic LED [OLED]
Abstract
The utility model relates to an LED series application and protection circuit with each LED in series connection, which is characterized in that the circuit adopts a power supply of a constant-current source; two ends of each series connected LED are in parallel connected with a voltage stabilizing diode. The circuit with the constant-current source is provided with a silicon bridge, an input end of the silicon bridge is connected with an AC power supply to output DC current after rectification, then access to an integrated chip and supply electricity with constant current by the provided output current, a sensibility regulation resistance and a smooth capacitance. With the utility model, arbitrary numbers of LEDs can be cascaded or intercepted in a certain range according to the requirements and the security of the circuit is not changed. When one LED is short-circuited, constant current is provided and the power supply parameter is not changed so as to protect the normal operation of the LED; when open circuit occurs, a bypass is provided so as to assure the normal operation of the loop. A provided adjustable resistance enables the output power and the sensitivity to be adjustable, thus efficiently assuring safe and more reliable LED application. The circuit has the advantages of reasonable and simple structure, low cost, energy saving, high efficiency, which can be widely used for fields such as lamps, illumination, graph and words indication and display screens, etc.
Description
Technical field
The utility model relates to the application circuit of LED, and particularly a kind of LED serial connection is used holding circuit.
Background technology
At present, LED more and more widely be used in every field such as lamp decoration, illumination, picture and text indication and display screen.LED is generally the application that is connected in series, if certain LED damages during series connection, all will bring fault to circuit; When certain LED short circuit, will cause load change, change power supply parameter; If certain LED open circuit will make entire circuit work.No matter open a way or short circuit, all can influence the decoration, demonstration, illuminating effect of LED, and strengthen maintenance load so that circuit can't move.
The utility model content
The purpose of this utility model is to overcome above-mentioned weak point, and a kind of circuit design advantages of simple is provided, and the safe and reliable LED serial connection of performance is used holding circuit.
The technical scheme that the utility model adopted is for achieving the above object: a kind of LED serial connection is used holding circuit, and each LED is characterized in that for being connected in series circuit adopts constant current source power supply, and each LED coupled in series two ends Zener diode in parallel.
Described constant-current source circuit is provided with silicon bridge, and its input is connected with AC power through rectification output direct current, and regulates resistance, sensitivity adjusting resistance and smoothing capacity by the output current that is provided with, and inserts integrated chip and constant current output power supply.
The beneficial effects of the utility model are: the holding circuit when providing a kind of simple and effective LED to be connected in series, can carry out the LED cascade or the intercepting of any number as required within the specific limits, and the security performance of circuit is constant.When certain LED short circuit, constant current is provided, do not change power supply parameter, protection LED operate as normal; When open circuit, bypass is provided, the loop is normally moved.The adjustable resistance that is provided with makes power output and sensitivity adjustable, makes things convenient for the selection of circuit application.Because a plurality of LED cascade operations, certain LED open circuit or short circuit are unavoidable in long-term application, therefore more demonstrate importance and the necessity that is provided with its holding circuit, and it is more safe and reliable to ensure that effectively LED uses.In addition, because the price of Zener diode is very low, help reducing production cost of products.
In a word, the utility model circuit is simple, and is reasonable in design, and stable performance is safe and reliable, and is with low cost, efficient energy-saving; Can be widely used in every field such as lamp decoration, illumination, picture and text indication and display screen.
Description of drawings
Fig. 1 is the utility model holding circuit connection diagram;
Fig. 2 is the utility model constant-current source circuit connection diagram.
The specific embodiment
Below in conjunction with accompanying drawing and preferred embodiment, details are as follows to the specific embodiment, structure, feature that foundation the utility model provides:
As shown in Figure 1 and Figure 2, a kind of LED serial connection is used holding circuit, and each LED is for being connected in series, and the circuit when promptly several LED are connected in series is connected as LED1, LED2 to LEDn; It is characterized in that circuit adopts constant-current source E power supply, and each LED coupled in series two ends Zener diode Dw in parallel, as corresponding LED1, LED2 to LEDn respectively parallel connection be provided with Zener diode Dw1, Dw2 to Dwn.
Described constant-current source E circuit is provided with silicon bridge GQ, and its input is connected with AC power through rectification output direct current, and regulates resistance R 1, sensitivity adjusting resistance R 2 and smoothing capacity C1 by the output current that is provided with and insert integrated chip IC and constant current output power supply.
Directly alternating current 220V input of this constant-current source E, through silicon bridge GQ rectification output direct current, and the access model is the integrated chip IC of 22002P.R1 shown in Fig. 2 is for regulating the current-limiting resistance of output current, and R2 is that resistance is regulated in sensitivity, and C1 is a smoothing capacity; This constant-current source E circuit is constant current output under the situation of input 220V ± 10%, and can regulate power output by the current-limiting resistance that is provided with as required.
Normal conditions, when change of external conditions, the LED both end voltage may raise, fragile LED; But LED two ends and the Zener diode Dw that connects make voltage remain on low relatively level, effectively protect LED; If run into cause specific, the LED damage of opening circuit, electric current can flow through from the Zener diode Dw of parallel connection so, does not influence other LED pipe operate as normal.In addition, the utility model is used constant-current source E power supply, in case certain LED short circuit damages, the voltage on other LED can not increase, and can not produce chain effect, effectively protects other LED.
In the enforcement, can carry out the LED cascade or the intercepting of any number as required within the specific limits, for example select 100 of red LED pipes, white, green each 70 all can, the security performance of circuit remains unchanged.
The LED series connection is used and must be used constant current source power supply, comprises the accurate constant-current source circuit that easy electric capacity, resistance etc. are formed.When selecting Zener diode Dw, should note:
1, the power of Zener diode Dw can not be lower than the power of LED, and the power of general LED is very little, and usually, minimum Zener diode Dw just can satisfy, but great power LED and when meeting Zener diode Dw is wanted the power of strict selection Zener diode Dw.
The voltage at two ends when 2, the selection of the voltage stabilizing value of Zener diode Dw will be higher than the LED operate as normal; Electric current during the one side operate as normal in Zener diode Dw is very little, does not increase whole power consumption substantially; For example: the LED operating current is 20mA, and the electric current on the Zener diode Dw will be significantly less than 1mA so.The voltage stabilizing value of Zener diode Dw again can not be too high in addition, if the too high protective effect that will reduce LED; For example: the LED operate as normal of general white is at 20mA, and at this moment, the voltage at two ends is 2.9V to 3.3V, and Zener diode Dw can select for use about 3.6V, satisfies above-mentioned two conditions substantially like this.
Above-mentioned detailed description of this LED serial connection application holding circuit being carried out with reference to embodiment; be illustrative rather than determinate; can select various parameters as required,, should belong within the protection domain of the present utility model therefore in the variation and the modification that do not break away under the utility model general plotting.
Claims (2)
1. a LED serial connection is used holding circuit, and each LED is characterized in that for being connected in series circuit adopts constant current source power supply, and each LED coupled in series two ends Zener diode in parallel.
2. LED serial connection according to claim 1 is used holding circuit; it is characterized in that described constant-current source circuit is provided with silicon bridge; its input is connected with AC power through rectification output direct current; and output current adjusting resistance, sensitivity adjusting resistance and smoothing capacity by being provided with, insert integrated chip and constant current output power supply.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200955179U CN201014383Y (en) | 2007-03-16 | 2007-03-16 | LED series connecting application protection circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200955179U CN201014383Y (en) | 2007-03-16 | 2007-03-16 | LED series connecting application protection circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201014383Y true CN201014383Y (en) | 2008-01-30 |
Family
ID=39026177
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2007200955179U Expired - Fee Related CN201014383Y (en) | 2007-03-16 | 2007-03-16 | LED series connecting application protection circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201014383Y (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101754514A (en) * | 2008-12-01 | 2010-06-23 | 李旭明 | Municipal power constant current LED lamp circuit |
| CN101861015A (en) * | 2010-04-30 | 2010-10-13 | 深圳创维－Rgb电子有限公司 | LED light bar protective circuit |
| CN101636016B (en) * | 2009-07-09 | 2012-06-27 | 天津市数通科技有限公司 | Long-life type high power factor constant current LED driving power source |
| CN103533698A (en) * | 2012-07-03 | 2014-01-22 | 成都市宏山科技有限公司 | Light-emitting diode driver with protection path |
| US9288866B2 (en) | 2010-06-18 | 2016-03-15 | Koninklijke Philips N.V. | Light-emitting apparatus and lighting appliance provided with the same |
| CN107850645A (en) * | 2015-06-30 | 2018-03-27 | 飞利浦照明控股有限公司 | Load circuit derives via the state of electric capacity |
-
2007
- 2007-03-16 CN CNU2007200955179U patent/CN201014383Y/en not_active Expired - Fee Related
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101754514A (en) * | 2008-12-01 | 2010-06-23 | 李旭明 | Municipal power constant current LED lamp circuit |
| CN101636016B (en) * | 2009-07-09 | 2012-06-27 | 天津市数通科技有限公司 | Long-life type high power factor constant current LED driving power source |
| CN101861015A (en) * | 2010-04-30 | 2010-10-13 | 深圳创维－Rgb电子有限公司 | LED light bar protective circuit |
| US9288866B2 (en) | 2010-06-18 | 2016-03-15 | Koninklijke Philips N.V. | Light-emitting apparatus and lighting appliance provided with the same |
| US9609717B2 (en) | 2010-06-18 | 2017-03-28 | Philips Lighting Holding B.V. | Light-emitting apparatus and lighting appliance provided with the same |
| CN103533698A (en) * | 2012-07-03 | 2014-01-22 | 成都市宏山科技有限公司 | Light-emitting diode driver with protection path |
| CN107850645A (en) * | 2015-06-30 | 2018-03-27 | 飞利浦照明控股有限公司 | Load circuit derives via the state of electric capacity |
| CN107850645B (en) * | 2015-06-30 | 2020-09-11 | 昕诺飞控股有限公司 | Load circuit state derivation via capacitance |
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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: 20080130 Termination date: 20120316 |