What are the characteristics of LED waterproof power supply?
LED waterproof power supply is a kind of LED drive power supply. It is a voltage converter that converts the power supply into a specific voltage and current to drive the LED to emit light. Generally, the input of the LED drive power supply includes high-voltage power frequency AC (that is, commercial power), Low-voltage DC, high-voltage DC, low-voltage high-frequency AC (such as the output of electronic transformers), etc. The output of the LED drive power supply is mostly a constant current source that can change the voltage as the forward voltage drop of the LED changes.
The difference between it and the general LED drive power is the waterproof function. According to different needs, it can be designed to IP65, IP66, IP67, IP68 and other waterproof and dustproof levels. Among them, those with IP68 rating can be completely immersed in water.
According to the power rules of the power grid and the characteristics of the LED drive power supply, the following points should be considered when selecting and designing the LED drive power supply:
1. High reliability
Especially like the driving power supply of LED street lamp, it is installed at high altitude, which is inconvenient for maintenance and the cost of maintenance is also large.
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 where the power supply is installed in the lamp. Because the luminous efficiency of LEDs decreases as the temperature of LEDs increases, the heat dissipation of LEDs is very important. The efficiency of the power supply is high, its power consumption is small, and the heat generated in the lamp is small, which reduces the temperature rise of the lamp. It is beneficial to delay the light decay of LED.
3. High power factor
The power factor is the load requirement of the power grid. Generally, there is no mandatory index for electrical appliances under 70 watts. Although the power factor of a single consumer with low power is lower, it has little effect on the power grid, but everyone lights up at night, and the similar loads are too concentrated, which will cause serious pollution to the power grid. For the LED drive power of 30 watts to 40 watts, it is said that in the near future, there may be certain index requirements for power factors.
4. Drive method
Now there are two types of traffic: one is a constant voltage source for multiple constant current sources, and each constant current source separately supplies power to each LED. In this way, the combination is flexible, all the way LED failure, 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 a bit lower, but the flexibility is poor, and it is necessary to solve the problem of a certain LED and not affect the operation of other LEDs. These two forms coexist for a period of time. The multi-channel constant current output power supply mode will be better in terms of cost and performance. Perhaps it is the mainstream direction in the future.
5. Surge protection
The ability of LED to resist surge is relatively poor, especially the ability to resist reverse voltage. It is also important to strengthen protection in this regard. Some LED lights are installed outdoors, such as LED street lights. Due to the start-off of the grid load and the induction of lightning strikes, various surges will be invaded from the grid system, and some surges will cause damage to the LED. Therefore, the LED drive power must have the ability to suppress the intrusion of the surge and protect the LED from being damaged.
6. Protection function
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.
The external installation type of the lamp, the power supply structure should be waterproof and moisture-proof, and the shell should be resistant to sunlight.
8. The life of the driving power supply should be matched with the life of the LED.
9. To meet the requirements of safety regulations and electromagnetic compatibility.
If you want to know more, our website has product specifications for power supply, you can go to ALLICDATA ELECTRONICS LIMITED to get more information