How about the power efficiency of LED drive power and PFC? What's the difference and connection between the two?
PFC means "power factor correction". Power factor refers to the ratio of the effective power to the total power consumption (apparent power), that is, the active power divided by the total power consumption (apparent power). Power factor can be used to determine the extent to which power is effectively utilized. When the power factor value is greater, the higher the power utilization rate is, the better the PF value of the driving power supply can be above 0.95.Before the two have not too much contact, but there will be some impact, PFC high should power conversion efficiency is also high, must be verified.
Efficiency is the ratio of output power to input powerPFC is the ratio of active power to reactive powerIt doesn't matter
The power supply efficiency is the ratio of output power to input power, if the power output power is 40W, the input power is 50W, so the power efficiency is 0.8, that is to say, 80% of the power supply power to the load power, the other 20% is the energy of the power supply, so the power efficiency is high, the energy consumption is small. The power supply efficiency is mainly related to the quality of the use of electronic components, is also associated with cost, now the power efficiency good can do more than 0.9.
