What are the requirements for LED drive power

　　What the real high-quality LED driver power supply should have? What kind of features or that it should meet those requirements? ENELTEC company summed up the following main aspects:

　　1 high reliability and life: the life of drive power to be adapted with the LED life, especially as the drive power LED lights, as installed in the high-altitude, convenient maintenance, maintenance cost is also large;

　　2 High efficiency: For the power LED lights installed in the structure, which is particularly important. Because the LED luminous efficiency increases as temperature decreases LED, the LED of the cooling is very important. Power, high efficiency, its power consumption is small, the heat in the fixture is small, it reduces the temperature rise of the lamp, the LED light on the slow decline favorable.

　　3 High Power Factor: As society demands for power quality continues to improve, there is growing concern caused by electrical equipment, power quality and harmonic problems. Such as the EU has issued standards requiring power greater than 25W power supplies must have the power factor correction circuit. And many other countries for 30 ~ 40W LED driver power supply, it is said will soon have the power factor might be some indicator.

　　4 constant current driver: now prevailing there are two: one is a constant source for multiple constant current source, constant current source for each channel individually to each LED power supply. In this way the combination of flexible, all the way LED failure does not affect other LED's work, but the cost will be slightly higher. The other is a direct constant current power supply, LED in series or parallel. It has the advantage of low cost that, but flexibility is poor, but also to solve a LED failure does not affect other LED running issue.

　　5. Appropriate output ripple: ripple will affect the LED light output. However, the use of higher quality to reduce ripple and capacity of the capacitor. In order to improve the overall life of the power, designers tend to use non- capacitor program. Engineers must determine the output ripple indicators compromise.

　　6 Surge Protection: LED anti-surge capacity is relatively poor, especially anti-reverse voltage capability. Some LED lights installed in the outdoors, due to grid load rejection and lightning induction start from the grid system will invade a variety of surge, surge can cause some damage to the LED. LED drive power supply should therefore invasion of surge suppression to protect the LED's ability to not be damaged.

　　7. Protection: In addition to regular power protection features, the best increase in the constant current output LED temperature negative feedback to prevent LED temperature is too high.

　　8 protection aspects: the lamps installed outside structure, the power structure to be waterproof, moisture, shells and Fast.

　　9 To comply with safety regulations and electromagnetic compatibility requirements.