• Follow us
Home > News > Content
LED Street Light Attention To The 10 Matters
Aug 22, 2017

LED lights in the current community of large-scale application for the progress of lighting projects played a decisive role, especially LED lights and energy-saving low-carbon aspects of the community has made important contributions to the following we say that in the daily use of the process LED lights should pay attention to 10 matters.

1, LED street lamp power must be constant current

LED lighting characteristics of the lamp determines its environmental impact, such as temperature changes, then the LED current will increase; the other voltage increases, LED current will follow the increase. Such as long-term over the rated current and work, it will greatly shorten the life of LED lamp beads. LED constant current is in the temperature and voltage and other environmental factors change, but also to ensure that its work current value unchanged.

2, LED street lamp power constant current accuracy

Some of the power supply on the market constant current accuracy is poor, the error may be ± 8%, constant current error is too large. General requirements in ± 3% on it. Press 3% of the design. Production power to be fine-tuned to achieve ± 3% error.

3, LED street lamp power supply voltage

General LED recommended operating voltage is 3.0-3.5V, tested, most of the work in 3.2V, so the calculation by 3.2V more reasonable. N lamp beads in series with the total voltage = 3.2 * N

4, LED street lamp power supply current is how much is the most appropriate

For example, the rated current of the LED 350 mA, and some factories used to do, the design 350 mA, in fact, this work under the current heat is very serious, after several comparative tests, designed to 320 mA is ideal The Try to reduce the amount of heat, so that more energy into visible light.

5, LED lights power board in series with the wide voltage to how wide it?

To make LED street lamp power supply in the wide range of input voltage range AC85-265V, then the light board LED string parallel way is very important. Try not to use wide voltage, can be divided into AC220V, AC110V as much as possible classification, so as to ensure power supply reliability. As the current power supply is generally non-isolated step-down constant current power supply, the required voltage 110V, the output voltage should not exceed 70V, the series number does not exceed 23 string. Input voltage 220V output voltage can reach 156V. In other words, the number of series does not exceed 45 strings. Parallel number not too much, otherwise the working current is too large, power fever serious. There is also a wide voltage scheme, APFC active power compensation is to use L6561 / 7527 to raise the voltage to 400V, and then buck, the equivalent of two switching power supply. This program is used under certain conditions.

6, isolated / non-isolated

General isolation power supply such as made 15W, on the LED lights in the power supply, the transformer is very large, it is difficult to put into. Mainly to see the spatial structure, depending on the specific circumstances, the isolation can only be done in general 15W, more than 15W very little, and the price is very expensive Therefore, the isolation of the price is not high, generally non-isolated accounted for more mainstream, the volume can be done smaller, the minimum can be high 8 mm, in fact, non-isolated security measures done, there is no problem. Space allows you to do the isolation power supply.

7, LED street lamp power to what can be done with the lamp beads board match?

In fact, choose a best string and parallel way, plus the voltage and current on each LED is the same, and the power of the effect can play the best performance. The best way is to first communicate with the power supply manufacturers, tailor-made. Or self-produced power.

8, LED street lamp power efficiency

Input power minus the output power value, this parameter is particularly important, the greater the value of the lower efficiency, it means that a large part of the input power into heat out; if installed in the lamp will produce a very high temperature , Coupled with a luminous efficiency of our LED than the heat, will be superimposed to produce a higher temperature, and our internal power supply of all electronic parts will increase with the temperature rise and shorten, so that efficiency is to determine the power life of the most The fundamental factor, the efficiency can not be too low, otherwise consumed in the power of the heat is too large. Non-isolated efficiency is higher than the isolation type, generally more than 80% can, but the efficiency of the matching with the light board connection

9, LED lights light source heat

The main factor of the cooling program is LED lights lamp beads in the use of thermal conditions can greatly extend the life, generally with aluminum, easier to heat. That is, LED street lamp power beads posted on the aluminum plate, the external as far as possible to expand the cooling area.

10, LED lights power supply cooling

   The main factor is the heat dissipation LED street lamp power beads in the use of thermal conditions can greatly extend the life, generally with aluminum radiator, easier to heat. That is, LED street lamp power beads posted on the aluminum plate, the external as far as possible to expand the cooling area.

   The above ten things for our detailed analysis of the LED lights attention points, the rational use will improve the life of LED lights, reduce production costs, I believe that no matter who will be very interested.