According to the rules of grid electricity and the characteristics of the led driver 120w 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 Floodlight 80W lights, installed at high altitude, inconvenient repairs and maintenance spend.
2, 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 Flood light 10W 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.
3.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 Supply, 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 Spotlight 30W 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.