I believe everyone has a certain understanding of LED driver power. LED drive power In fact, it is a kind of power supply, but It is a specific power supply that drives the LED to emit light with voltage or current. So what are the characteristics of LED driver power supply? The following is the introduction of Ming Jinfang Xiaobian.

Characteristics of LED driver:

(1) High reliability

Especially like the driving power supply of LED street lights, it is installed at high altitude, which is inconvenient to maintain, and the maintenance cost is also high.

(2) High efficiency

LED is an energy-saving product, and the driving power is more efficient. It is very important to dissipate heat from the junction of the power supply installed in the luminaire. The efficiency of the power supply is high, its power loss 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) Protection function

In addition to the conventional protection function of the power supply, it is best to increase the negative feedback of the LED temperature in the constant current output to prevent the LED temperature from being too high; it must meet the requirements of safety regulations and electromagnetic compatibility.

(4) Driving method

Now there are two types: 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 the failure of one LED will not affect the work of other LEDs, but the cost will be slightly higher. Its advantage is that the cost is lower, but the flexibility is poor, and it also needs to solve the problem of a certain LED failure without affecting the operation of other LEDs. These two forms coexist for a period of time. The multi-channel constant current output power supply method will be better in terms of cost and performance. Maybe 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. Strengthening this protection is also important. Some LED lights are installed outdoors, such as LED street lights. Due to the start-up of the grid load and the induction of lightning strikes, various surges will invade from the grid system, and some of the surges will cause damage to the LED.

(6) High power factor

Power factor is the load requirement of the grid. Generally, there are no mandatory indicators for electrical appliances below 70 watts. Although the power factor of a single electrical appliance with low power is low, it has little impact on the power grid, but a large amount of lighting is used at night, and the same load is too concentrated, which will cause serious pollution to the power grid. For the 30W~40W LED drive power supply, it is said that in the near future, there may be certain index requirements for power factor.

The above features of LED drive power supply are shared here. LED drive power supply can convert the power supply into a specific voltage and current to drive the LED light-emitting voltage converter, usually Case: The input of the LED drive power includes high-voltage power frequency AC (ie mains), low-voltage DC, high-voltage DC, low-voltage high-frequency AC (such as the output of an electronic transformer), etc.