Daylight lamp has widespread application in our daily life, supermarket, school, office, metro, etc. , can be seen in public places, can see the use of fluorescent lamp! LED fluorescent lamp, energy saving and energy saving performance, after a lot of publicity for a long period of time, you have been well accepted, but spend high price to buy back the LED fluorescent tube, many are now go to a cheap energy-saving lamps in the same situation with energy saving without JieQian! And it is a lot of waste of money, how to make the service life of the LED and brightness were satisfied to use standard, is a very meaningful topic! LED fluorescent tube to keep long life and high brightness, power, LED light source, to solve the problem of heat dissipation, security, four key technologies. A power supply
power first requirement is high efficiency, high efficiency products, hot stability is low, it must be high. Usually in power supply some useful isolation and the isolation of two solutions, isolation of large volume, low efficiency, in use, the installation will create many problems, as the isolated product market prospect is big, here we mainly discuss the isolation drive solutions.
the use of the isolation of the LED fluorescent lamp power supply, with its wide Taiwan peng A704WFT of technology companies, for example, A704WFT MOS tube plugins, its basic line as shown in figure 1
the basic circuit diagram
1, the mains power supply power supply characteristics ( 85 ~ 265 v) , external MOS, unlimited power;
2, low power consumption, high efficiency, high power factor;
3, load open circuit and short circuit protection and output over-voltage protection function, current lines good potter, approximate DC DC output current, no lights flashing phenomenon, high load capacity, can drive current of 600 ma; 91, can pass the CE certification, including EN55015 EMI test, lighting lamps and lanterns below 25 w C harmonic standards, EFT 1000 v pulse group of tests, the 2000 v electrostatic test of ESD. 15 application can output low voltage control, without using traditional large capacitor, can well control the output of the harmonic current;
5, the application scheme of the LED daylight A704 mature and reliable, we can provide the LED fluorescent lamp can be EMC test of PCB line and BOM information, improve the speed of the customer design and development products! 2 LED light source
adopt Taiwan ryukyu cummings patent structure LED lamp bead, the chip is placed in the feet, and heat over silver feet chips directly to the node of tropical, with traditional into products, and traditional patch products in terms of heat dissipation is different, the chip node won't produce cumulative temperature, thus ensuring the good usability of light source lamp beads, guarantee long life light source lamp beads, low light failure.
traditional patch products, although can through the chip of gold thread connection is negative, but also let the heat energy produced is chip, silver, gold wire connected to transmission of heat and electricity are by the transmission of money, the accumulation of heat in the long run will directly affect the service life of LED fluorescent tube.
traditional way of SMT products heat conduction route and the following figure 2
2 and ryukyu cummings LED transmission route and way below 3
3 ryukyu and cummings LED its patent heat dissipation structure can make the heat generated by the chip node out quickly, do not produce the accumulation of heat in the chip, so as to realize the LED light source lamp beads can be used long life. And ryukyu and cummings company in LED the life of the test process, high and low temperature impact, reflow soldering, the application of various complex environment, such as the use of high temperature and high humidity do the complete experimental analysis, to ensure the normal use of the low light failure of long life! Three heat
to the introduction of the infrared radiation and applied to the fluorescent tube, is an important means of improving the service life of the bulb. Considered in heat dissipation, we will LED light source lamp beads, cooling and power of heat to separate, each other, so as to ensure the rationality of the heat dissipation.
way there are three kinds of heat conduction, convection, conduction and radiation. Convection and conduction in a closed environment, the implementation may be small, and the heat by radiation, and is the focus of the fluorescent tube to consider. Here is what we are doing the LED fluorescent tube in the test data, measure the temperature of the outside LED silver foot solder only 58 degrees.
test report results above data for the input power for 11. 2, luminous flux in 890 lm test report. The highest tube temperature of 40. 213 degrees, the temperature for power capacitor can easy job for a long time, so as to ensure the long life of the power to use! Four security
security, here basically said PC flame retardant plastic tubes, because the infrared heat radiation can penetrate the PC tube, then we design considerations LED lights, when using can more considering the safety, use of all plastic physical insulation way, even in the use of isolated power supply can absolutely guarantee the safety of use.
the LED fluorescent lamp has been quite a long time of development, from the point of the effect of energy saving, and its future application is quite broad, in addition to the energy conservation, the security, the use of long life is that we should be more attention!
security! In the design of LED fluorescent lamp is the first element, fluorescent lamp, in PC flame retardant materials after solved the security problem, how to improve the life, the above solution presented by the various project hope for many LED fluorescent tube manufacturers to provide more thinking!
zhi son
innovation network