CN205232541U - LED driver embeds dial switch isolation control circuit - Google Patents
LED driver embeds dial switch isolation control circuit Download PDFInfo
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- CN205232541U CN205232541U CN201521032010.XU CN201521032010U CN205232541U CN 205232541 U CN205232541 U CN 205232541U CN 201521032010 U CN201521032010 U CN 201521032010U CN 205232541 U CN205232541 U CN 205232541U
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Abstract
The utility model discloses a LED driver embeds dial switch isolation control circuit, LED drive circuit's output is connected with dial switch circuit, dial switch circuit and optoelectronic coupler circuit connection, optoelectronic coupler circuit and electron switch circuit connection, electronic switching circuit and digital to analogue conversion circuit connection, the digital to analogue conversion circuit is according to dial switch circuit's different on off states, the different DC voltage value of output. Dial switch circuit is provided with a n switch K1... Kn, a total 2n on off state, control digital to analogue conversion circuit output 2n kind DC voltage value.
Description
Technical field
The utility model relates to the LED driver of lighting field, particularly the built-in toggle switch isolation control circuit of a kind of LED driver.
Background technology
In recent years, the plurality of advantages such as LED illumination efficiency is high because having, the life-span is long, compact and environmental protection and present developing state with rapid changepl. never-ending changes and improvements.
Voltage-current characteristic due to LED presents non-linear and negative temperature characteristic, and therefore, in LED illumination, general employing constant current drives.
For the LED luminescence component of different capacity, various combination mode, need the driver that corresponding different electric current is provided, thus form the various LED driver of specification.In order to reduce the specification kind of LED driver, propose the demand that can change driver output current easily.And for same LED load, change the change that drive current also means luminosity, therefore, change driver output current and be also often called as LED light modulation.The change of drive current, as required, can be continuous print, also can be segmentation.
LED driver of a great variety.In the LED driver circuit of constant current output, as long as provide a given magnitude of voltage to output current control circuit, LED driver just has the constant current driver output of corresponding current value.
Obtain control and drive system output current control voltage and have various ways, as changed the abbreviation TRIAC of the silicon controlled angle of flow be connected in ac power supply line; The PWM mode of pulse width modulation; 0 ~ 10V adjustable voltage control mode etc.No matter which kind of mode is all finally formation satisfactory direct-current control voltage.
Produce the source of above-mentioned control voltage, can from internal drive or outside, the controller implementing to control also can in internal drive or outside.
Patent CN1033269541 " a kind of LED constant current controllers of integrated three kinds of output current specifications ", disclose a kind of for PWMLED driver special chip, with 2 toggle switchs, obtain the method that LED driver exports 350mA, 700mA and 1050mA tri-kinds of output currents.But first it be clear and definite only for the application of PWMLED driver special chip, be secondly that 2 toggle switchs used are only used in non-isolation type LED driver.In order to overcome above-mentioned limitation, need a kind of LED driver control circuit that can be suitable for various constant current output, and more can be applicable to the control circuit of LED driver output current of isolated form, to guarantee the safety of control device and operation.
Summary of the invention
Technical problem to be solved in the utility model is built-in control switches in LED driver, utilizes isolation photoelectrical coupler to realize the constant current output electric current of stepping.The technical solution of the utility model is such:
The output of LED drive circuit, be connected with toggle switch circuit, toggle switch circuit is connected with optocoupler circuit, optocoupler circuit is connected with electronic switching circuit, electronic switching circuit is connected with D/A switch circuit, D/A switch circuit, according to the different on off states of toggle switch circuit, exports different DC voltage values.
Described toggle switch circuit is provided with n K switch
1k
n, have 2
nindividual on off state, domination number/analog conversion circuit exports 2
nplant DC voltage value.
A described n K switch
1k
nbe connected respectively n optocoupler circuit and n electronic switching circuit.
Described D/A switch circuit is that direct voltage is connected in series two resistance, the tie point of two resistance, and form bleeder circuit and export, bleeder circuit output, series resistor is connected with each electronic switching circuit respectively.
The utility model has the advantages that, the setting of a constant-current LED driver output driving current is realized in simple and economical mode, same LED driver is made to adapt to the driving requirement of multiple LED luminescence component, be more suitable for the control circuit of the LED driver output current of isolated form, to guarantee the safety of control device and operation.
Accompanying drawing explanation
Fig. 1 is the utility model embodiment circuit diagram;
Number in the figure explanation
Embodiment
The utility model is the output at LED drive circuit, be connected with toggle switch circuit 1, toggle switch circuit 1 is connected with optocoupler circuit 2, optocoupler circuit 2 is connected with electronic switching circuit 3, electronic switching circuit 3 is connected with D/A switch circuit 4, D/A switch circuit 4, according to the different on off states of toggle switch circuit 1, exports different DC voltage values.
Described toggle switch circuit 1 is provided with n K switch
1k
n, have 2
nindividual on off state, domination number/analog conversion circuit 4 exports 2
nplant DC voltage value.
A described n K switch
1k
nbe connected respectively n optocoupler circuit 2 and n electronic switching circuit 3.
Described D/A switch circuit 4 is that direct voltage Vcc is connected in series two resistance R5, R6, the tie point of two resistance R5, R6, and form bleeder circuit and export Y, bleeder circuit output Y, series resistor R4a, R4b is connected with each electronic switching circuit 3 respectively.
Below in conjunction with accompanying drawing, describe embodiment of the present utility model in detail
The each one end of toggle switch K1 and K2 in described toggle switch circuit (1) is connected to input X, and links together with the output of LED driver.The other end of toggle switch K1 connects the input pin A of photoelectrical coupler U1a in described photoelectric coupled circuit (2), one end of another input pin K connecting resistance R1a of photoelectrical coupler U1a, and another termination of resistance R1a exports ground.One end of the output pin C connecting resistance R2a of photoelectrical coupler U1a, another termination low-voltage dc power supply Vcc of resistance R2a; One end of output pin E connecting resistance R3a of photoelectrical coupler U1a and the control pole G of electronic switch switching tube Q1a, another termination of resistance R3a elementaryly.The source S of switching tube Q1a connects elementaryly, the drain D of switching tube Q1a is connected with one end of D/A switch resistance R4a, the other end of D/A switch resistance R4a, output Y is connected to the link of lower divider resistance R5 and upper divider resistance R6, the other end ground connection of lower divider resistance R5, another termination low-voltage dc power supply Vcc of upper divider resistance R6.
Equally, the other end of toggle switch K2 connects the input pin A of photoelectrical coupler U1b in described photoelectric coupled circuit (2), one end of another input pin K connecting resistance R1b of photoelectrical coupler U1b, and another termination of resistance R1b exports ground.One end of the output pin C connecting resistance R2b of photoelectrical coupler U1b, another termination low-voltage dc power supply Vcc of resistance R2b; One end of output pin E connecting resistance R3b of photoelectrical coupler U1b and the control pole G of electronic switch switching tube Q1b, another termination of resistance R3b elementaryly.The source S of switching tube Q1b connects elementaryly, and the drain D of switching tube Q1b is connected with one end of D/A switch resistance R4b, and the other end of D/A switch resistance R4b is connected to output Y.
In described D/A switch circuit (4), on resitstance voltage divider, divider resistance R6 and lower divider resistance R5 is fixing, but its partial pressure value is by D/A switch resistance R4a, whether R4b etc. are in parallel with lower divider resistance R5 because of the connection of electronic switching tube Q1a, Q1b etc. and change.
N=2 in the present embodiment, adopts 2 toggle switchs, can obtain 2 powers i.e. 4 ON/OFF output states of 2.If the state representing toggle switch with 1 is logical, the state representing toggle switch with 0 is disconnected, and 2 toggle switchs will have 00 successively, 01,10,11 4 kinds of possible control modes, accordingly, the lower divider resistance of D/A switch resitstance voltage divider is resistance R5 successively, and resistance R5 and R4a is in parallel, resistance R5 and R4b is in parallel, resistance R5 and R4a and R4b is in parallel, and the voltage exported from Y will be followed successively by the highest, secondary high, low, minimum.By selecting suitable lower divider resistance R5, and D/A switch resistance R4a, the resistance of R4b etc., just can obtain " the highest " that need, " secondary high ", " low ", the determined value of " minimum ".
Adopt the position toggle switch of n=3, increase corresponding photoelectric coupled circuit, switching circuit and D/A switch resistance, just have 000,001,010,011,100,101,110,111 grade 8 kinds state of a controls, correspondingly, exports the different voltage of 8 kinds of height from Y.By that analogy, adopt the toggle switch of figure place n, can N=2 be obtained
nplant different control voltages.
Claims (3)
1. the built-in toggle switch isolation control circuit of LED driver, is characterized in that, LED drive circuit
Output, be connected with toggle switch circuit, toggle switch circuit is connected with optocoupler circuit, optocoupler circuit is connected with electronic switching circuit, electronic switching circuit is connected with D/A switch circuit, D/A switch circuit, according to the different on off states of toggle switch circuit, exports different DC voltage values; Described toggle switch circuit is provided with n K switch
1k
n, have 2
nindividual on off state, domination number/analog conversion circuit exports 2
nplant DC voltage value.
2., by the built-in toggle switch isolation control circuit of LED driver according to claim 1, it is characterized in that, a described n K switch
1k
nbe connected respectively n optocoupler circuit and n electronic switching circuit.
3. by the built-in toggle switch isolation control circuit of LED driver according to claim 1, it is characterized in that, described D/A switch circuit is that direct voltage is connected in series two resistance, the tie point of two resistance, form bleeder circuit to export, bleeder circuit output, series resistor is connected with each electronic switching circuit respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201521032010.XU CN205232541U (en) | 2015-12-14 | 2015-12-14 | LED driver embeds dial switch isolation control circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201521032010.XU CN205232541U (en) | 2015-12-14 | 2015-12-14 | LED driver embeds dial switch isolation control circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205232541U true CN205232541U (en) | 2016-05-11 |
Family
ID=55907578
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201521032010.XU Active CN205232541U (en) | 2015-12-14 | 2015-12-14 | LED driver embeds dial switch isolation control circuit |
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|---|---|
| CN (1) | CN205232541U (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106026623A (en) * | 2016-06-23 | 2016-10-12 | 广州金升阳科技有限公司 | Isolation type electronic switch |
| CN107396500A (en) * | 2017-08-28 | 2017-11-24 | 盐城莱廷绍工业技术有限公司 | A kind of programmable a variety of electric current output LED drive circuits |
| CN107466134A (en) * | 2017-08-28 | 2017-12-12 | 盐城莱廷绍工业技术有限公司 | It is a kind of to dim the LED drive circuit to go out |
| CN107466133A (en) * | 2017-08-28 | 2017-12-12 | 盐城莱廷绍工业技术有限公司 | A kind of multistage exports LED drive device |
| CN107517519A (en) * | 2017-08-28 | 2017-12-26 | 盐城莱廷绍工业技术有限公司 | A kind of segmented light modulation output LED drive device |
| CN107770910A (en) * | 2017-10-30 | 2018-03-06 | 上海阿卡得电子有限公司 | A kind of LED is segmented multistage dimming driving circuit |
| CN107787091A (en) * | 2017-11-17 | 2018-03-09 | 上海阿卡得电子有限公司 | A kind of dialing LED multistage light adjusting circuits |
-
2015
- 2015-12-14 CN CN201521032010.XU patent/CN205232541U/en active Active
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106026623A (en) * | 2016-06-23 | 2016-10-12 | 广州金升阳科技有限公司 | Isolation type electronic switch |
| CN106026623B (en) * | 2016-06-23 | 2019-07-19 | 广州金升阳科技有限公司 | A kind of isolated electronic switch |
| CN107396500A (en) * | 2017-08-28 | 2017-11-24 | 盐城莱廷绍工业技术有限公司 | A kind of programmable a variety of electric current output LED drive circuits |
| CN107466134A (en) * | 2017-08-28 | 2017-12-12 | 盐城莱廷绍工业技术有限公司 | It is a kind of to dim the LED drive circuit to go out |
| CN107466133A (en) * | 2017-08-28 | 2017-12-12 | 盐城莱廷绍工业技术有限公司 | A kind of multistage exports LED drive device |
| CN107517519A (en) * | 2017-08-28 | 2017-12-26 | 盐城莱廷绍工业技术有限公司 | A kind of segmented light modulation output LED drive device |
| CN107770910A (en) * | 2017-10-30 | 2018-03-06 | 上海阿卡得电子有限公司 | A kind of LED is segmented multistage dimming driving circuit |
| CN107770910B (en) * | 2017-10-30 | 2024-02-02 | 上海阿卡得电子有限公司 | LED segmentation multistage dimming driving circuit |
| CN107787091A (en) * | 2017-11-17 | 2018-03-09 | 上海阿卡得电子有限公司 | A kind of dialing LED multistage light adjusting circuits |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |