What are the performance requirements of led downlights?

1.High reliability is especially like the drive power of LED street lights, installed at high altitude, inconvenient maintenance, and large maintenance costs.

2. High efficiency LED is an energy-saving product, and the efficiency of the driving power supply is high. It is particularly important for the structure of the power supply installed in the lamp. 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 power loss is small, the heat generated in the lamp is small, and the temperature rise of the lamp is reduced. It is beneficial to delay the light decay of LED.

3. High power factor The power factor is the load requirement of the grid. Generally, electrical appliances below 70 watts have no mandatory indicators. Although the low power factor of a single electrical appliance with low power has little impact on the power grid, the same type of load is too concentrated at night, which will cause more serious pollution to the power grid. For 30 watts to 40 watts of LED drive power, it is said that in the near future, there may be certain indicators for power factors.

4. There are two driving methods: one is a constant voltage source for multiple constant current sources, each constant current source separately to each LED power supply. In this way, the combination is flexible, and the LED failure all the way does not affect the work of other leds, but the cost will be slightly higher. The other is direct constant current power supply, LED series or parallel operation. Its advantage is that the cost is lower, but the flexibility is poor, but also to solve a LED failure, does not affect the operation of other LED problems. These two forms, for some time, coexist. Multiple constant current output power supply mode, in terms of cost and performance will be better. May be the mainstream direction in the future.

5. Surge protection LED anti-surge ability is relatively poor, especially anti-reverse voltage ability. Strengthening protection in this area is also important. Some LED lights are installed outdoors, such as LED street lights. Due to the start of the power grid load and the induction of lightning strikes, various surges will be invaded from the power grid system, and some surges will cause damage to the LED. Therefore, the LED driver power supply should have the ability to inhibit the invasion of the surge and protect the LED from being damaged.

6. In addition to the conventional protection function of the power supply, it is best to increase the LED temperature negative feedback in the constant current output to prevent the LED temperature from being too high.

7. In terms of protection, the lamp is installed outside, the power structure should be waterproof, moisture-proof, and the shell should be sun-fast.
8. The life of the drive power supply should be compatible with the life of the LED.