Basic parameters of LED power supply
See how high-power LED power supplies, power supplies of different powers are not the same, basically like this:
1~7W power supply:
Most of them achieve power factor>0.5, efficiency>70% is considered passing; good ones can achieve power factor>0.7, efficiency>70% even excellent, and power factor>0.9, efficiency>80% are also available, but the cost performance is too low , Very few people use.
8~20W power supply:
Achieving power factor>0.7, efficiency>75% is considered passing; if it is good, power factor>0.8, efficiency>80% is considered excellent; achieving power factor>0.9, efficiency>90% is basically used for fluorescent lamps LED lights with higher requirements are rarely seen on bulbs. The highest can achieve power factor> 0.99, efficiency> 92%, but you can ask the price of such a power supply. At least twice as expensive.
Power supply above 20W:
Regarding the current stability, basically the LED power supply with constant current IC is okay. Pay special attention to the resistance and capacitance, and the stability of these is not good. This kind of power supply is mainly divided into two uses, one is used for multiple light bars, the power factor of this kind of power supply is basically not high, and the efficiency is also average.
There is also one for street lights. This kind of power supply is basically excellent. It may be related to the price of street lights. Power factor> 0.99, efficiency> 92% abounds, but these power supplies do not completely depend on these two parameters, and mainly depend on their waterproof performance. , Lightning protection, high and low temperature resistance and other parameters.
