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While in the progress of LED light in the same period, it'll drive the advancement of DIRECTED driver power and other BROUGHT marketplace, but because of the market purchase is not perfect, the LED driver energy market will be a bad cost competition, merchandise homogenization, dragons and fishes cluttered together along with other undesirable phenomena.

Currently while in the area of light, LED lamp gets the special brilliance in the facets of energy-saving alternative power use of incandescent and fluorescent lights large is now an inevitable development, no longer simply great plan for LED light LED lighting goods market, monetary subsidies to promote the work also develops very swiftly, it's also resulted in the quick advancement of LED driver.

The LED electricity sector technological limit is not large, so the folks from all guides of life are at a low price cost to come back in, and in addition generated dilemma in the market, product requirements aren't single, marketplace has not created a series of troubles, like the standard of horrible price competitiveness, and finally the greatest hazard is the major-power corporations did not R & D and output of more top quality goods.

In the LED driver development, wise and modular led drivers also triggered lots of discussion. Infact, modularity describes the standardization, industrialization of packaging, to reduce expenses through engineering invention, engineering, size production. The lamp can be adjusted by the clever generally identifies the perfection and flip the lights on / off control. For your modular and sensible problem, but different landscapes are held by each.

Light emitting diode has been extensively used in lighting, ornamental lighting products, in the layout of LED lamps, must consider in order to ensure the standard work of Light emitting diode, to choose what sort of Light emitting diode as the series and parallel load, and led drivers, with sensible design.

1, Light emitting diode uses all series

The LED driver output high voltage demands. Distribution in different ends of the various LED voltage, present through each Light emitting diode of the sam-e, the brightness of LED agreement, when the LED uniformity difference is bigger.

When a LED lousy quality short-circuit, if the power-driven (such as for instance common resistance capacitance step-down way), as a result of drive output voltage steady, subsequently the allotment will be raised in the two endings of LED residual voltage, driver output current will rise, which is simple to damage the remainder of Light emitting diode. Like the use of constant-current LED driver, when a Light emitting diode of lousy quality as a result of short circuit, driver output current stays unchanged, doesn't change the remainder all the standard work of Light emitting diode.

When a LED lousy quality after disconnection, in series with the Light emitting diode won't bright. The alternative in each Light emitting diode is linked in parallel with a zener, of course is, the turn-on voltage of the zener voltage higher than Light emitting diode need to direct, otherwise LED is just not bright

2, Light emitting diode uses all in parallel way

LED driver output high current, load voltage reduced. In the sam e voltage is assigned by all the Light emitting diode at both ends, when the LED uniformity difference is bigger, and the existing of each Light emitting diode is not the same, led driver dimmable differs. Can choose the better consistency LED, suitable for the low-supply voltage products (such as for instance solar or battery powered).

When a LED lousy quality when disconnected, if the voltage type LED drive (such as for instance voltage switching power-supply), drives the output current will be decreased, without affecting the standard work of all Light emitting diode. The distribution increases in the remaining part of the LED current

At present, LED illumination market is very vibrant, the led driver companies mainly split into three classes:

One, the LED chip manufacturer, additionally it for the downstream soaked, It merely understands several enterprise understanding and knowledge of BROUGHT fluorescent light power;

Two, the original ordinary illumination manufacturer, when it enter a brand new class, it'll understand some knowledge of signal;

Three, As new entrants in to the manufacturer, they have additional goods or fresh business, some understanding to the led power supply, and a few do not.

Sequence parallel and wide voltage LED lamp table: type AC85-265V to make BROUGHT fluorescent light within the feedback voltage opportunity breadth, the light cell line parallel DIRECTED strategy is very important. Because of the present power supply for non isolated money power, in the request of broad voltage, the output voltage does not exceed 72V, the feedback voltage is obtainable in 85-265V classification. That's to mention, the collection amount of only 23 collection. Simultaneous range is not a lot of, otherwise the performing existing is too large, serious temperature, / 8 and /12 and and introduced for 5. The sum total present does not exceed 240 Ma also.

1,led lamp energy and light dish: some customers to style the lamp section, then find the electricity, find it difficult to get sufficient power supply, voltage or current is too big, too tiny (such as I, 350mA, V < 40V); or the present is also modest, the voltage is too high (such as I 180V), result is significant warmth, reduced performance, maybe not enough input voltage range. Actually, choose one of many perfect string and connection process, placed on each BROUGHT to the voltage and present will be the same, nevertheless the effect of strength could enjoy the best performance. The easiest way will be to transmission and power supply suppliers, tailored.

LED lamp power supply is the most significant section of LED fluorescent lamp, LED light can not utilize incorrect variety, effectiveness, can not possibly standard program. And consumers in the act of assistance, found some problems, put forward some tips, reference for customer selection.

2,why must be frequent: faculties of BROUGHT semiconductor resolved its are affected by setting. For example, elevated temperature deviation, LED expansion of existing, voltage increase, LED current increase. Long-term over additional existing function, lifestyle is likely to be drastically decreased DIRECTED. Although LED is in constant heat and voltage modifications along with other ecological components, to make sure that the working recent of the exact same.

3,BROUGHT operating recent: extra work existing standard LED 20 mA, some producers started to employ around 20 mA, in reality, the present function of heating is very critical, after repeated comparison test, made 16-18 Ma can be an ideal. The total present =17*N D circuit parallel;

4,The operating voltage of the LED proposed working voltage: LED is 3.0-3.5V, after screening, nearly all work in 3.125V, therefore the 3.125V formula is sensible. The sum total voltage =3.125*M M lamp series

5, Constant current precision: industry some power supply constant current accuracy is inadequate, such as the common PT4107 / HV9910 / BP2808 / SMD802 plan of regular movement system, the problem is at ± 8% and ± 10%, mistake regular too big. Normal requirements could be within ± 3%. According to the 3% errors, 6 parallel, mistake of every path about ± 0.5PERCENT, if 12 parallel, error of every highway about ± 0.25%, the accuracy will do. Detail is high, the price may significantly enhance. However the led driveway lights , 16 Ma and 18 Ma has little influence.