Know About LEDTube LED Ceiling Lamp Power Supply
The ceiling lamp, like LED flood light, is a lighting product that in great demand. It is inseparable with the properties of energy-saving and environmental protection. LED ceiling lamp comprise of a shell, LED tube, and power supply. Power supply will directly affect the performance and service life. Therefore, when we consumers purchase LED ceiling lamp, it is necessary to understand the related knowledge of power to discriminate quality of the product from good to bad.
Below, we will teach you how to get to know LED ceiling lamp power supply, hope that will be helpful for you cognition and purchase that in the future.
1 According to the LED current and voltage characteristics, what is ideal is to use the constant drive current. It can avoid changes in the current caused by forward voltage change, constant current can keep stable brightness of LED ceiling light.
2 Non electrolytic capacitor design will be better as LED driving power supply: under normal conditions electrolytic capacitors is the shortest lifetime devices on circuit board, generally in the rated temperature 5000 hours of life, can be 10000 hours in good condition, the difference may be only 2000 hours. At present, the entire social environment is unprincipled pursuing low cost of production. So there is little chance of getting good material with low price. LED ceiling lamp life in good thermal conditions can reached 30000--50000 hours. To match the driving source and light source life, driving source without electrolytic capacitor is a good choice.
3 LED ceiling lamp working environment: because each of the local environment is different, LED ceiling lamp work environment need be considered such as: temperature, humidity, installation position. Considering the working style of power, if not add soft start circuit, there will be a voltage spike output. To protect LED better, we need to add a soft start circuit. This is one of the key factors keeping driving power supply stability.
4 temperature protecting function: in addition to conventional protection function, we'd better ad negative feedback of LED chip temperature in constant current output; to prevent the LED chip PN temperature is too high.
5 High efficiency: LED ceiling lamp is energy-saving products, power supply have to meet the requirement of energy saving. The structure of power installed in the lamp is particularly important. Because the luminous efficiency of LED lamp with increase of LED temperature. The higher efficiency of power, the smaller consumption of power, and the smaller heat inside LED ceiling lamp, at the same time reduces temperature rise of LED lamp.