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LED power characteristics
2012-12-19 14:23:36
 

LED power is an integral part of a great impact on the overall life of the LED lamps LED lamps below Shengnai Si LED manufacturers introduced LED power characteristics:

1. High reliability, especially as the drive power LED street lights, installed at high altitude, inconvenient maintenance, maintenance spend.

2. High efficiency LED energy-saving products, and higher efficiency of the drive power. For the structure of power installed in the fixture, is particularly important. LED luminous efficiency decreases with the rise of the temperature of the LED, the LED heat is very important. Power, high efficiency, small power depletion, heat small fixture lamps will reduce the temperature rise. Beneficial to delay the LED light failure.

3. The high power factor power factor grid load requirements. Generally less than 70 watts of electrical appliances, there is no mandatory targets. Although power is not a single bit lower electrical power factor has little effect on the power grid, but the evening lighting, the similar load too concentrated, to be grid more serious pollution. It is said that in the near future, may be power factor index requirements for 30 watts to 40 watts of LED drive power.

4. Drive now prevailing in two ways: The first is a constant voltage source for more than a constant current source, each constant current source power individually to each LED. In this way, the combination of flexible LED fault all the way, does not affect the work of other LED, but the cost will be slightly higher. Another is a direct constant current power supply, LED series or parallel operation. Its advantage is low cost, but the flexibility is poor, but also to resolve an LED fault, does not affect the other LED running problem. These two forms coexist for some time. Multi-channel constant current output power supply would be better, in terms of cost and performance. Perhaps the future direction of the mainstream.

5. Surge protection LED anti-surge capacity is relatively poor, especially anti-reverse voltage capability. Is also very important to strengthen the protection in this regard. Some led lights installed outdoors, such as LED street lights. Due to the the grid load Kai rejection and lightning induction from the grid system will invade various surge some surge can cause damage to the LED. Therefore, LED driving power supply to have inhibitory surge intrusion, and the ability to protect the LED without being damaged.

6. Protection function of power in addition to conventional protection features, the best increase in the constant current output LED temperature negative feedback to prevent LED temperature is too high.

7. Protection aspects lamps outside installation type, the power structure to be waterproof, moisture-proof shell Fast.

8. The drive power of life and the life of the LED phase adaptation.

9. To meet safety and electromagnetic compatibility requirements.

With the increasingly widespread application of LED, LED drive power performance will be more and more suited to the requirements of the LED.


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