According to the rules of grid electricity and the characteristics of the LED drive power requirements, the power of the LED driver in the selection and design to take into account the following nine performance characteristics requires:
1, high reliability, especially as the drive power of the led 1w , installed at high altitude, inconvenient repairs and maintenance spend.
, High efficiency, LED energy-saving products, the efficiency of the drive power to high. Is particularly important for the structure of power supply installed in the fixture. LED luminous efficiency of LED temperature decreases, so the led power 50w heat dissipation is very important. High efficiency power supply, the loss power, heat lamps, and reduces the temperature rise of the lamps. Beneficial to delay the LED light failure.
High power factor, power factor is the grid load requirements. Appliances generally less than 70 watts, there is no mandatory targets. Power is not a single electrical power factor on the grid has little effect, but at night we light a lamp, focus too much on similar load, the grid will produce a more serious pollution. 30 watts to 40 watts of led power 10w , said that in the near future, will power factors may have certain specifications.
4, drive mode, now common, there are two: one is a constant voltage source for the constant current source, each constant current source separately to each LED power supply. In this way, the combination of flexible, all the way to the LED fault, does not affect the other LED's work, but the cost will be slightly higher. Another is a direct constant current power supply, LED in series or parallel operation. Its advantage is low cost, but the flexibility is poor, but also to solve a led 10w fault, does not affect other LED running. These two forms co-exist within a certain period of time. Multi-channel constant-current output power supply, in terms of cost and performance. May be a future direction of the mainstream.
5, surge protection, LED Surge capacity is relatively poor, especially the anti-reverse voltage capability. Is also important to strengthen this protection. Some LED lights installed in the outdoors, such as LED street lights. Kai rejection grid load and the induction of lightning from the grid system will invade a variety of surge, some surge can cause damage to the LED. LED driver power supply have to inhibit the intrusion of the surge, the ability to protect the LED is not damaged.
6, protection, power in addition to conventional protection functions, the best increase in the constant current output LED temperature negative feedback to prevent the LED temperature is too high.
7, the protective aspects of the lamps outside the installation type, the power structure to be waterproof, moisture, shells and light fastness.
8, the drive power of life and the life of the High Power LED 50W adapter.
9, to comply with the requirements of safety and electromagnetic compatibility.