Due to energy regulations and cost pressures and other factors, the world is gradually moving from traditional lighting to longer life and more energy efficient LED. However, many people do not know that these innovative light sources require specialized equipment called the LED driver. LED drivers (also known as LED power supplies) are similar to fluorescent lamp ballasts or transformer power supplies, and they provide stable energy protection for the best performance of LEDs.
Why does LED drive power?
1, LED is in low voltage (12-24V) conditions of operation, and for the DC. However, we usually use high voltage (120-277V) and are alternating current. LED drive power will be high-voltage alternating current into low-voltage direct current, the output current is usually between 250uA-50A.
2, the drive power to protect the LED to withstand voltage or current fluctuations. A change in voltage may cause a change in the current supplied to the LED. LED light output proportional to its current supply, light-emitting diodes need to work in a certain current range. Therefore, the current is too large or too small will lead to LED temperature is too high, so that changes in light efficiency or attenuation.
In short, the LED driver converts high voltage AC to low voltage direct current while maintaining the rated voltage and current in the circuit.
As the cost of LED is much higher than the traditional lighting equipment, so the other way to reduce costs is how to extend the LED life cycle. When the LED failure, usually due to LED power supply damage, this time to replace the power can be. So the external LED drive power than the built-in LED drive power is more conducive to cost savings.
Some factors that are not conducive to LED power:
Power is often due to internal work temperature is too high and failure. High temperature over time will lead to component failure. If the temperature of the power supply is close to the maximum operating temperature during use, the service life will be reduced accordingly. The following figure shows the effect of different potting heat transfer materials on the temperature rise in the LED driver.
Moisture and dust:
Since the era of ballasts and fluorescent lamps, the best driver design is to protect the power supply from external factors. Such as moisture, acid, alkali, and even a variety of dust particles may damage the power, especially in the field of industrial or outdoor lighting.
In the current LED market, most of the waterproof drive power using potting material to protect components, at the same time, potting material can also help the power play a role in waterproof shock.
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