The key point in the 74 LED lamp design

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 led fluorescent tubes have a wide range of applications, supermarkets, schools, office City

metro in their daily lives, etc., provided that can appear in pu blic places could be seen

the extensive use of LED lamp! LED fluorescent tubes, energy saving function, through a long

time a lot of publicity, we have been very much recognized, but spend a higher price back to

the LED fluorescent tube, a lot are now come to a situation with low-cost energy-saving

lamps: energy-saving and not the Festival of money! And a lot of extravagant money, how to

make the LED service life and brightness to allow to meet the scale is commensurate with the

significance of the title subject LED fluorescent tube to maintain the long life and high

brightness, the topics to be addressed is: power supply, LED light, heat, security, four hub

technology
 
LED fluorescent tube design of the four hub
 LED fluorescent tube power supply subject
A power supply first and fo remost requirement is a high efficiency, high-efficiency

products, fever must not mess. Two options is usually useful for isolation of the power

sector and non-isolated, isolated volume is too large, and less efficient in use, the

installation will have a lot subject, not as good as non-market vision of the isolated

products, our main discussion of non- isolation of the driver program. The use of non-

isolated LED fluorescent tube power, wide Peng technology companies in Taiwan A704WFT,

A704WFT MOS tube ****

4.LED fluorescent tube safety topics
    Safety! LED fluorescent tube design is the first element, a fluorescent lamp using a PC

fire-retardant materials, to solve the safety topics, how to progress in life, I hope the

above proposed solution to a number of LED fluorescent tube manufacturers more thinking! The

development of LED fluore scent tube has been commensurate with the length of time, from the

energy-saving effect, the face of its future application is proportionate to the vast, in

addition to energy saving, safe, long-life use, we should be concerned! Security, the main

PC flame-retardant plastic tube, infrared heat can penetrate the PC pipe, we design

considerations LED lights use more of its safety, physical plastic insulation, even in the

use of non- The isolated power supply can absolutely guarantee the safety of use.

3.LED fluorescent tube light source subject
    Traditional patch products, through the gold wire connection of the chip is negative,

heat is also generated by the chip over gold wire to the silver feet, the conduction of heat

and electricity conduction money long thermal accumulation time a direct impact on the life

of the LED fluorescent tube.
The above data for the input power: 11.2 watts, luminous flux: 890LM when the test speech.

The highest tube temperature of 40.213 degrees, the temperature of the power supply

capacitors can be long and relaxed, thus ensuring long-life use of the power! Taiwan sulfur

Cummings patent structure, LED lamp, its chip placed in a pin heat silver pin directly to

the chip node tropical out, with the traditional-line products, and the patch in the heat

qualitatively different from the chip junction temperature is not cumulative, in order to

ensure the good use of the light source lamp beads, to ensure the long life of the light

source lamp beads, low light.

2 power supply features:
A mains power supply (85 ~ 265V), the external the MOS power not subject to restrictions;
2, low-power, high efficiency, high power factor;
3, with load open circuit and short circuit protection, output overvoltage protection,

current ripple characteristics, approximate DC DC output current, the lights flash, high

load capacity, can drive up to 600mA of current;
Customers have made the scale circuit 15W, 88% efficiency, power factor of 0.91, can be

certified by CE, EN55015 EMI test, Lighting 25W Class C harmonic scale, EFT the 1000V burst

test, ESD 2000V static test. 15 strings applications can output low voltage control, without

the use of traditional large pieces of capacitors can be very good control of the output

harmonic current;
A704 LED daylight applications are more mature and reliable, we can provide LED fluorescent

tube can be the line of EMC test PCB and BOM table reference speed, progress, customer

product design and development