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industry knowledge

LED Waterproof Power Supply

2019/03/18

The LED waterproof power supply is a kind of LED driving power supply, which 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 driving power source includes high-voltage power frequency communication (ie, mains), Low-voltage DC, high-voltage DC, low-voltage high-frequency AC (such as the output of electronic transformers). The output of the LED driver is mostly a constant current source that changes the voltage as the LED's forward voltage drop changes.

It is different from the general LED driver power supply in waterproof function. According to different requirements, it can be designed to be waterproof and dustproof grades such as IP65, IP66, IP67, IP68. The IP68 grade can be completely immersed in the water.

According to the power consumption 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:

High reliability

Especially like the driving power supply of LED street lamps, it is installed at high altitude, the maintenance is inconvenient, and the maintenance cost is also large.

2. High efficiency

LEDs are energy-saving products, and the efficiency of driving power supplies is high. It is especially important for the structure in which the power supply is installed in the luminaire. Since the luminous efficiency of the LED decreases as the temperature of the LED increases, the heat dissipation of the LED is very important. The power source has high efficiency, 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 LEDs.

3. High power factor

The power factor is the grid's load requirements. Generally, there are no mandatory indicators for electrical appliances below 70 watts. Although the power factor of a single power consumer with low power has little effect on the power grid, at night, everyone lights up, and the similar load is too concentrated, which will cause serious pollution to the power grid. For 30 watts to 40 watts of LED driver power, it is said that in the near future, there may be certain indicators for power factors.

4. Drive mode

There are two types of traffic: one is a constant voltage source for multiple constant current sources, and each constant current source supplies power to each LED separately. In this way, the combination is flexible, and all the LED faults do not affect the work of other LEDs, but the cost will be slightly higher. The other is direct constant current supply, with LEDs running in series or in parallel. Its advantage is that the cost is lower, but the flexibility is poor, and it is necessary to solve a certain LED failure without affecting the operation of other LEDs. These two forms coexist for a while. 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 LEDs to withstand surges is relatively poor, especially against reverse voltage capability. It is also important to strengthen protection in this area. Some LED lights are installed outdoors, such as LED street lights. Due to the start of the grid load and the induction of lightning strikes, various surges will be invaded from the grid system, and some surges will cause LED damage. Therefore, the LED driver power supply must have the ability to suppress the intrusion of surges and protect the LEDs from damage.

6. Protection function

In addition to the conventional protection function, the power supply preferably increases the LED temperature negative feedback in the constant current output to prevent the LED temperature from being too high.

7. Protection

The external installation of the lamp, the power supply structure should be waterproof and moisture-proof, and the outer casing should be light-resistant.

8. The life of the drive power should be matched to the life of the LED.

9. To comply with safety and electromagnetic compatibility requirements.

Yiwu Fuwei e-commerce firm (IACS Co., Limited) is a very professional Led manufacturer who produces high quality outdoor led light. Our popular products are solar led lights, UFO lights, underwater lights and so on. If you have any question about the led product, please feel free to contact us.