LED waterproof power supply range
Application scope: mainly for LED spotlight, LED lamp, LED street lamp, LED bulb, LED buried lamp, LED ceiling lamp, LED flat lamp, LED wall lamp and other LED lamps to provide driving capacity. Its most important feature is waterproof, can be used outdoors, without fear of rain, fog, direct sunlight and other harsh environment.
Working temperature: - 40 - 80 (- outer surface temperature) storage temperature: - 40 - 85 (- 40 - 85 C) working humidity: 10 - 90% average relative humidity life: average failure interval (MTBF) 50,000 hours safety certification: UL60950, EN61347 electromagnetic interference: CISPR 15; FCC 47CFR - Part 15B characteristics:
1. Driving power supply with high reliability, especially like LED street lamp, is installed at high altitude, which makes maintenance inconvenient and expensive.
2. high efficiency LED is an energy-saving product, and the efficiency of driving power is high. It is particularly important for the power supply to be installed in the luminaire. Because the luminous efficiency of LED decreases with the increase of LED temperature, the heat dissipation of LED is very important. The efficiency of the power supply is high, its loss power is small, and the heat in the lamp is small, which also reduces the temperature rise of the lamp. It is beneficial for retarding the decay of LED.
3. high power factor and power factor are the requirements of power grid to load. Generally, there are no mandatory indicators for electrical appliances below 70 watts. Although the low power factor of single electrical appliances with small power has little effect on the power grid, the same kind of load will cause serious pollution to the power grid when people light the lights at night. It is said that in the near future, there may be some requirements on power factor for 30-40 watt LED driving power supply.
4. There are two kinds of driving modes: one is a constant voltage source for multiple constant current sources, and each constant current source provides power to each LED separately. In this way, the combination is flexible, and the failure of the LED will not affect the work of other LEDs, but the cost will be slightly higher. The other is direct constant current power supply, and LED runs in series or parallel. It has the advantage of low cost, but poor flexibility, but also to solve a certain LED fault, do not affect the operation of other LED problems. These two forms coexist in a period of time. Multi way constant current output power supply will be better in terms of cost and performance. Maybe the mainstream direction in the future.
5. surge protection LED is relatively poor in surge resistance, especially anti reverse voltage capability. Strengthening protection in this area is also important. Some LED lights are outdoors, such as LED street lamps. Due to the triggering and lightning stroke of power grid load, various surges will be intruded from power grid system, and some surges will lead to the damage of LED. Therefore, the LED drive power supply should have the ability to suppress the surge invasion and protect the LED from damage.
6. In addition to conventional protection function, it is better to add negative feedback of LED temperature in constant current output to prevent excessive temperature of LED.
7. protection, lamps and lanterns are installed outside, the power supply structure should be waterproof and moistureproof, and the shell must be light resistant.
8. the life of the driving power should be compatible with the life of LED.
9., we must comply with the requirements of safety regulations and electromagnetic compatibility.
With the increasing application of LED, the performance of LED drive power will be more and more suitable for LE