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Street light manufacturers answer issues for LED.

  • Author:Eunice
  • Source:net
  • Release on :2016-03-24
         Shenzhen Risen OPTO CO.,Ltd, dmx512 intelligent lighting supplier,rgb dmx512 wall washer suppliuer,led dmx 512 wall washer supplier.
         LED lighting industry, lighting lighting project, not only affected by the global environment, also has the particularity of the industry. LED lighting power supply is precisely the present LED development priority among priorities, for the design of LED technology, there is a variety of solutions and unique design techniques, we will learn about.
1.LED lamp power supply why constant flow?
          LED lighting materials to determine their characteristics influenced by the environment, such as temperature increases, the current of LED will increase, the increase of the voltage, the electric current will increase LED. Long exceed the rated current, will greatly shorten the service life of the LED lamp. While the LED is in constant temperature and voltage variations and other environmental factors, to ensure the working current is constant.

2.LED lamp power supply constant current accuracy
         Some market power constant current precision, as the popularity of recommended scheme of constant current, constant current error is + 8%, the error is too large. General requirements can be within 3%. According to the design scheme of the 3%. The production of power should be adjusted to achieve + 3% error.

3.The working voltage of LED lamp power supply
         The recommended operating voltage LED is 3.0-3.5V, after the test, most of the work in 3.2V, so according to the formula of 3.2V is reasonable. The total voltage =3.2*N N lamp series.

4.How much is the working current of the LED lighting power supply power supply is the most appropriate
         For example, LED's rated current of 350 Ma, some factories began to use as much as 350 Ma, design, in this current work under heating is very serious, after repeated tests, designed 320 Ma is ideal. Try to reduce the amount of heat, let more electrical energy into visible light.

5.Series parallel and wide voltage LED lamp power board is wide?
          The range of AC85-265V to LED lighting power supply work in the input voltage range is wide, while the lamp panel series parallel LED mode is very important. Try not to use a wide voltage, can be divided into AC220V, AC110V as much as possible classification, so as to ensure the reliability of power supply. Due to the current power supply for non isolated buck type constant current power supply, the requirements of voltage 110V, output voltage should not exceed 70V, the number of not more than 23 string series. Input voltage 220V output voltage can reach 156V. That is to say, the number of not more than 45 string series. The parallel number is not too much, otherwise the working current is too large, serious heating power. There is a wide voltage active power compensation scheme, APFC is the first to use L6561/7527 to raise the voltage to 400V, then the blood pressure, the equivalent of two switching power supply. This solution can be used under specified conditions. 
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