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What need to be paid attention to when designing the LED tube light by floodlights lsd

What need to be paid attention to when designing the LED tube light by
Article Posted: 08/15/2013
Article Views: 125
Articles Written: 370
Word Count: 820
Article Votes: 0
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What need to be paid attention to when designing the LED tube light

Five common questions of LED tube light

Current, LED tube light market is very active, the manufacturer is mainly divided into three categories: one is the original factory that manufacture LED chip, taking advantage of an opportunity to penetrate downstream,not much understanding on the knowledge of the circuit and the power of the LED tube light; II is that the factory originally doing general lighting has entered a new field, understanding some of the knowledge of the circuit; three is the factory that did other products or new business completely engaging in new entrants, and some understanding the LED power supply, and some do not. The power is the most important part of the LED tube light, improper selection, the performance of the LED fluorescent lamp can not be played, or even can’t be normally used.

1, why must constant:

The characteristics of LED semiconductor determines its influenced by the environment. such as the temperature rises, LED current increases, the voltage increases, LED current will increase. Working under the current over the rated for long time will greatly shorten the service life of the LED. The LED constant current is that ensure that the operating current is constant even if the environmental factors such as temperature and voltage changes.

2, the power match the light board of the LED tube light:

Some customers firstly design the light board, then find the power, it is difficult to find a suitable power, either too much current or the voltage is too small (eg I> 350mA, V <40V); either the current is too small, the voltage is too high (eg I < 40mA, V> 180V), the result is a severe fever, low efficiency, or the input voltage range is not enough. In fact, selecting one of the most excellent string and connection mode make that the voltage and current added to each LED is the same so that the effect of power is able to play the best performance. The best way is tailoring prior to communicate with power supply manufacturers.

3, LED operating current:

The LED rated current is generally 20 mA, and some plants used to make the outset, designing 20 mA, in fact, the fever generated under this current is very serious, after numerous comparison test, 17 mA designed is ideal . The total current of N-way parallel = 17 * N;

4, LED’s operating voltage:

Generally speaking, the LED recommended operating voltage is 3.0-3.5V, tested, most of the work at 3.125V, so 3.125V is a more reasonable. The total voltage of M series LED = 3.125 * M

5, series and parallel LED light board and wide voltage:

For LED lamp operating at a relatively wide range of that the input voltage is AC85-265V, then the series and parallel mode of the light board is very important. Due to the current power is generally non-isolated step-down power, when require the wide voltage, the output voltage should not exceed 72V, the input voltage range can be reached 85-265V. That is, the serial number should be no more than 23 strings. Number of parallel must not too much, otherwise the high operating current generates too serious fever, and the 6/8 and / 12 is recommended .Not more than 240 mA total current is better. There is a wide voltage solution that is firstly using L6561/7527 to raise the voltage to 400V, then the buck, which is equivalent to two switching power, twice as expensive as the costs, the cost of this program is not high, there is no market.

Nowadays,the LED flood light and LED tube light is most widely used as the representatives of the home lighting and decorative lighting in daily life,the LED tube light enjoys a great popularity in our corridor, restaurants, shopping, leisure and entertainment, galleries, exhibition halls and other indoor environments everywhere, the LED flood light is mainly used in city squares, parks, stadiums, the facades of large commercial buildings and hotel, stage, waiting rooms, airports etc. where the higher brightness lighting is needed to illuminate. Lead Lighting adopts high brightness SMD as the light source of the LED tube and highly integrated and high brightness COB as the light source of the LED flood light, which fully guaranteed stability and soft light of the LED tube light and octahedron breadth and brightness irradiation range of the LED flood light, the low voltage constant current driver convert the AC into DC so that improve energy efficiency and reduce the waste heat energy and stroboscopic effect excite the human eye, the most important is that the LED tube light and LED flood light without adding mercury and other heavy metals harmful to our body and pollution the environment, that’s why the LED light is famous for energy-saving and environmental protection ,login to learn more features and uses of the LED tube light and surf to know more awesome LED floodlights and other LED lighting.

Related Articles - constant current, general lighting, LED flood light, LED lamp, LED light, LED tube light, mA, power supplylight board,

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