1. Improve the life of the driving power supply One of the most important advantages of LED is its long service life, which is about 30,000 to 100,000 hours. The traditional LED driving power supply contains electrolytic capacitors, and the lifespan of electrolytic capacitors is relatively short, about 5,000 hours. This is the main reason that restricts the life of the LED driving power supply. Therefore, electrolytic capacitors should not be used in the LED driving power supply as much as possible. 2. Improve the input power factor of the drive power supply and reduce the total harmonic distortion. The "ENERGYSTAR" solid-state lighting document issued by the US Department of Energy stipulates that: any power level requires mandatory power factor
1. Improve the life of the driving power supply
One of the important advantages of LEDs is their long service life, about 30,000 to 100,000 hours. The traditional LED driving power supply contains electrolytic capacitors, and the lifespan of electrolytic capacitors is relatively short, about 5,000 hours. This is the main reason that restricts the life of the LED driving power supply. Therefore, electrolytic capacitors should not be used in the LED driving power supply as much as possible.
2. Improve the input power factor of the drive power supply and reduce the total harmonic distortion. The "Energy Star" (ENERGYSTAR) solid-state lighting document issued by the US Department of Energy stipulates that: any power level requires mandatory power factor correction . This standard applies to a series of products, such as table lamps, cabinet lighting and so on. Among them, the power factor of the LED driving power supply for household and residential lighting must be greater than 0.7, and for commercial lighting, it must be greater than 0.9. The IEC61000-3-2 harmonic content standard stipulates that the total harmonic distortion (THD) should be less than 35% and the power factor should not be less than 0.7 in lighting with a power level greater than 25W. The promulgation of these standards puts forward higher requirements for the design of the driving power supply for LED lighting.
3, reduce the size of the driving power supply
LED itself is relatively small, which is very beneficial for portable products. The LED drive power supply should also be as small as possible, so that it can be smoothly installed in the LED lamp holder. In the design process, the volume of the drive power supply should be reduced as much as possible. [5]
4. Improve the reliability of the driving power supply
In the LED working process, non-human factors such as high temperature and device aging can cause fatal damage to the LED body. Therefore, protection circuits such as overvoltage protection and overcurrent protection should be added to the LED drive power supply to deal with accidents and ensure the safe operation of the LED body.
