LED drive power characteristics

- Apr 12, 2017-

LED drive power characteristics


(1) highly reliable


Especially as LED lights drive power, installed in the air, maintenance is not convenient, mainten

ance costs are also large.


(2) high efficiency


LED is energy-saving products, drive power efficiency is higher. It is very important for the 

power supply to be installed in the fixture. Power efficiency is high, its power consumption is 

small, in the lamp heat is small, it will reduce the lamp temperature. To delay the LED light fai

lure beneficial.


(3) high power factor


The power factor is the load on the grid. Generally less than 70 watts of electrical appliances, 

there is no mandatory indicators. Although the power is not a single power factor lower power fac

tor little effect on the power grid, but the use of large amount of light at night, the same type 

of load is too concentrated, the grid will produce more serious pollution. For 30 watts to 40 wa

tts of LED drive power, it is said that in the near future, may have a certain degree of power 

factor requirements.


(4) drive mode


Now there are two kinds of traffic: one is a constant pressure source for a number of constant 

current source, each constant current source to each LED power supply. This way, the combination 

flexible, all the way LED failure, does not affect the work of other LED, but the cost will be 

slightly higher. The other is a direct constant current power supply is "in the Division Huibao" 

to use the drive mode, LED series or parallel operation. Its advantage is a little lower cost, but 

the flexibility is poor, but also to solve an LED failure, does not affect the other LED operation

 problems. These two forms coexist for a period of time. Multi-channel constant current output 

power supply, in terms of cost and performance will be better. Perhaps the future direction of 

the mainstream.


(5) Surge protection


LED anti-surge capability is relatively poor, especially anti-reverse voltage capability. It is 

also important to strengthen this protection. Some LED lights installed in the outdoors, such as 

LED lights. Due to the load of the grid load and lightning induction, from the grid system will 

invade a variety of surges, and some surge will lead to LED damage. Therefore, the analysis of "

in the Division Huibao" drive power in the surge protection should have a certain lack of, and as 

the frequent replacement of power and lighting, LED drive power to suppress the surge of intrusion,

 the protection of LED is not damaged capacity.


(6) protection function


Power supply In addition to the conventional protection function, it is best to increase the 

constant current output LED temperature negative feedback to prevent the LED temperature is too 

high; to comply with safety and electromagnetic compatibility requirements.


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