CN203243574U - Small-size high-efficient high-power LED lighting driver - Google Patents
Small-size high-efficient high-power LED lighting driver Download PDFInfo
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- CN203243574U CN203243574U CN 201320264365 CN201320264365U CN203243574U CN 203243574 U CN203243574 U CN 203243574U CN 201320264365 CN201320264365 CN 201320264365 CN 201320264365 U CN201320264365 U CN 201320264365U CN 203243574 U CN203243574 U CN 203243574U
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- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 17
- 229910052742 iron Inorganic materials 0.000 claims abstract description 8
- 238000004146 energy storage Methods 0.000 claims abstract description 7
- 238000005286 illumination Methods 0.000 claims abstract description 7
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims abstract description 6
- 229910052802 copper Inorganic materials 0.000 claims abstract description 6
- 239000010949 copper Substances 0.000 claims abstract description 6
- 239000000463 material Substances 0.000 claims abstract description 6
- 229910000859 α-Fe Inorganic materials 0.000 claims abstract description 5
- 238000006243 chemical reaction Methods 0.000 claims abstract description 4
- 239000002159 nanocrystal Substances 0.000 claims description 5
- 230000006978 adaptation Effects 0.000 claims description 2
- 230000003321 amplification Effects 0.000 claims description 2
- 238000003199 nucleic acid amplification method Methods 0.000 claims description 2
- 238000002360 preparation method Methods 0.000 abstract 2
- 241001465382 Physalis alkekengi Species 0.000 abstract 1
- 238000001914 filtration Methods 0.000 abstract 1
- 239000002707 nanocrystalline material Substances 0.000 abstract 1
- 230000035699 permeability Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000005070 sampling Methods 0.000 description 2
- 230000032683 aging Effects 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000005381 potential energy Methods 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 238000009877 rendering Methods 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
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Abstract
The utility model discloses a small efficient high-power LED lighting driver, this LED driver include circuit module such as EMI filtering, AC/DC conversion, PFC circuit, DC/DC conversion, PWM drive control to subsidiary PWM interface of adjusting luminance can drive the following LED illumination lamps and lanterns of 20 watts. The key device (energy storage inductance) that this driver used adopts the preparation of iron-based nanocrystalline material, compares with the inductance of traditional ferrite material preparation, has reduced components and parts occupation space volume, can reduce inductance loss and copper line use amount moreover, compares with prior art, the utility model has the characteristics of small, efficient, practice thrift copper line consumption.
Description
Technical field
The utility model relates to a kind of electric equipment device, particularly relates to a kind of small-sized efficient high-power LED drive circuit.
Background technology
As lighting source of new generation, LED is little because of its energy consumption, luminous efficiency is high, and color rendering is good, and therefore environmentally safe is called as green light source.From incandescent lamp 220V alternating current directly drive different, the use of LED need to the drive circuit of its coupling.The matter of utmost importance of drive circuit is currents match, if drive current is lower than the LED operating current, can causes its luminous intensity inadequate, and be higher than its operating current, can cause again that the LED light decay is serious, device aging, even LED such as burns out at the problem.Secondly because civil power is not 220V voltage stabilizing output, so drive circuit need to add protective circuit to reach the effect of pressure-stabilizing constant flow, add the requirement of the aspects such as power factor, so that led drive circuit is more complicated, cause in the drive circuit components and parts more, wherein the key components energy storage inductor need to take than large space, causes its cost higher, and volume is larger; So how making led drive circuit miniaturization, high efficiency is one of problem of LED development need solution.
Summary of the invention
Purpose of the present invention is exactly to provide a kind of miniaturization high efficiency high-power LED drive circuit for the defective that overcomes above-mentioned prior art existence.
For solving the problems of the technologies described above, the present invention takes following measures to realize:
A kind of small-sized efficient high-power LED illumination driver is provided, it is characterized in that: this driver adopts the constant-current source driving LED luminous, during LED curent change (increase or reduce), constant-current source circuit collects the current value of variation, after carrying out the current error amplification, be transferred to control circuit PWM chip, control circuit carries out anti-phase processing to sampled signal, output pulse width change (reduce or increase), the power tube of the output pulsed drive power conversion stage of change width, so that output voltage changes (reduce or increase), can produce self adaptation adjustment (reduce or increase) so flow through the electric current of LED, this has just kept the current constant of LED.The employed Primary Component energy storage inductor of this driver adopts the iron based nano crystal material to make, compare with the inductance that the conventional iron ferrite is made, reduced the components and parts volume that takes up room, and can reduce inductor loss and copper cash use amount, compared with prior art, the present invention has that volume is little, and efficient is high, saves the characteristics that copper cash consumes.
Effective effect of the present utility model is: the utility model can realize that energy storage inductor takes up room and reduce more than 50%, thereby effectively reduces the overall volume of led driver, realizes its miniaturization.
Description of drawings
Fig. 1 is a kind of small-sized efficient high-power LED illumination of the utility model drive system structural representation;
Fig. 2 is a kind of small-sized efficient high-power LED illumination of the utility model drive circuit schematic diagram.
Embodiment
Below in conjunction with accompanying drawing the utility model example is described in detail, thereby so that the advantage of utility model and feature are easy to be those skilled in the art will recognize that protection range of the present utility model is made more explicit defining.
See also Fig. 1, Fig. 2, the utility model embodiment has adopted XLT604 to drive control chip as the PWM efficient LED.The control chip that but XLT604 is step-down, boost, buck drives great power LED.This chip both had been applicable to the AC input, also was applicable to the direct current input of 8 ~ 450 V, and series connection or the string that can drive up to a hundred LED are in parallel, guaranteed brightness and the life-saving of LED by the regulating constant flow valuve.PWM end can adopt the method for low frequency pulse-width modulation to regulate LED brightness, the double potential energy end of doing simultaneously, and when this end is unsettled, the control of chip no-output.Shown in Figure 1 is the drive system structure chart, shown in Figure 2 is the driver example circuit schematic diagram that adopts the XLT604 control chip, this driver can drive 20 watts of LED lightings, its constant current drives control principle: when the GATE of XLT604 control chip end output high level, the LED string will be directly passed in the energy storage of inductance or transformer primary side inductance, and when power MOSFET turn-offs, be stored in the drive current that energy on the inductance will be converted to LED.When vdd terminal voltage during greater than UVLO, the GATE end can be exported high level, and circuit will be worked by the mode of power-limiting tube current peak value this moment.With the source series of foreign current sampling resistor and power tube, when the magnitude of voltage of external sampling resistance surpassed set point (inner setting value 250mV also can pass through the LD external setting-up), power tube turn-offed.If wish system's soft start, then can be at LD end over the ground and connect an electric capacity, so that the LD terminal voltage rises by the speed of expectation, and then the electric current rising of control LED.For the utility model indication Primary Component energy storage inductor, its design formula is as follows:
In the formula,
Be effective permeability, N is coil turn (circle), Se is net sectional area, le is the average length of magnetic path (cm), because inductance value is directly proportional with effective permeability, the inductance of same specification, the effective permeability of iron based nano crystal is 375mH/m, the maximum permeability of Ferrite Material is 6.25mH/m, so two kinds of inductance of same electrical sensibility reciprocal, the volume of Fe base nanometer crystal inductance reduces more than 50% than the volume of ferrite inductance, and since ferritic magnetic hysteresis loss much larger than the iron based nano crystal material, therefore the inductor loss of making of the iron based nano crystal material is less, uses the driving power efficient of this inductance higher, and the power-efficient of this driving power example reaches more than 90%.
Claims (2)
1. small-sized efficient high-power LED illumination driver, it is characterized in that: this driver adopts the constant-current source driving LED luminous, during LED curent change (increase or reduce), constant-current source circuit collects the current value of variation, after carrying out the current error amplification, be transferred to control circuit PWM chip, control circuit carries out anti-phase processing to sampled signal, output pulse width change (reduce or increase), the power tube of the output pulsed drive power conversion stage of change width, so that output voltage changes (reduce or increase), can produce self adaptation adjustment (reduce or increase) so flow through the electric current of LED, this has just kept the current constant of LED.
2. small-sized efficient high-power LED illumination driver according to claim 1, it is characterized in that: the employed Primary Component energy storage inductor of this driver adopts the iron based nano crystal material to make, compare with the inductance that the conventional iron ferrite is made, reduced the components and parts volume that takes up room, and can reduce inductor loss and copper cash use amount, compared with prior art, it is little that the present invention has a volume, efficient is high, saves the characteristics that copper cash consumes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320264365 CN203243574U (en) | 2013-05-16 | 2013-05-16 | Small-size high-efficient high-power LED lighting driver |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320264365 CN203243574U (en) | 2013-05-16 | 2013-05-16 | Small-size high-efficient high-power LED lighting driver |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203243574U true CN203243574U (en) | 2013-10-16 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201320264365 Expired - Fee Related CN203243574U (en) | 2013-05-16 | 2013-05-16 | Small-size high-efficient high-power LED lighting driver |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103630352A (en) * | 2013-12-13 | 2014-03-12 | 武汉科技大学 | Device for detecting VS52 electric regulating valve |
| CN103677048A (en) * | 2013-12-03 | 2014-03-26 | 京东方科技集团股份有限公司 | Drive circuit and electronic device |
| CN105323930A (en) * | 2015-11-13 | 2016-02-10 | 余塘 | LED dimming constant-current drive circuit |
-
2013
- 2013-05-16 CN CN 201320264365 patent/CN203243574U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103677048A (en) * | 2013-12-03 | 2014-03-26 | 京东方科技集团股份有限公司 | Drive circuit and electronic device |
| CN103677048B (en) * | 2013-12-03 | 2015-11-11 | 京东方科技集团股份有限公司 | A kind of driving circuit and electronic installation |
| CN103630352A (en) * | 2013-12-13 | 2014-03-12 | 武汉科技大学 | Device for detecting VS52 electric regulating valve |
| CN105323930A (en) * | 2015-11-13 | 2016-02-10 | 余塘 | LED dimming constant-current drive circuit |
| CN105323930B (en) * | 2015-11-13 | 2018-01-09 | 余塘 | LED dims constant-current drive circuit |
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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: 20131016 Termination date: 20140516 |