What are the three major advantages of a switching power supply?
Low power consumption, high efficiency. In the switching power supply circuit, a transistor V in the excitation signal excitation, it alternately working through the on-off state by - conduction in the guide, fast conversion speed, the frequency is about 50kHz, in some advanced countries, can do to hundreds or nearly 1000kHz. this makes the power switch transistor V is small, the power efficiency can be greatly improved, the efficiency can reach 80%.
How about the power efficiency of LED drive power and PFC? What's the difference and connection between the two?
And the change of input signal voltage by frequency or width to compensate. So, in the power grid voltage change is large, it can still ensure the output voltage stable voltage range. So the switching power supply voltage is wide, the effect is very good. In addition, changing the duty ratio method with pulse width modulation and frequency modulation type two. Switching power supply not only has the advantages of wide range voltage, and realize voltage method is more, designers can according to the actual application requirements, flexible selection of various types of switching power supply.The efficiency of the filter is greatly improved, and the capacity and volume of the filter capacitor are greatly reduced
Small volume, light weight. The principle diagram of the switching power supply can be clearly seen here with a frequency transformer heavy. Due to the adjustment of tube power dissipation on V greatly reduced, but also saves large fins. Because of these two reasons, so the switching power supply of small volume and light weight.The voltage regulating range is wide. The output voltage of the switching power supply is regulated by the duty ratio of the exciting signal, and the change of the input signal voltage can be adjusted by frequency modulation or width adjustment
