LED switching power supply characteristics
Principle and characteristics of LED switching power supply
Three conditions of ED switching power supply
1, switch is: power electronic devices work in switch state instead of linear state.
2. High frequency: power electronic devices operate at high frequencies rather than power frequencies.
3, DC: switching power supply outputs DC rather than communication.
The LED switching power supply is a high-speed switch on and cut-off by the circuit to control the switch tube. It converts DC into high frequency AC to change the voltage of the converter, so that it can produce one or more sets of voltage needed! The efficiency of high frequency AC in transformer circuit is higher than that of city power 50Hz or 60Hz, so the transformer of switching power supply can be very small, it will not be very hot when switching power supply works, and the product price is lower than that of power frequency DC regulated power supply. If 50 Hz or 60Hz is not changed into high frequency power, then the switching power supply has no significance. The switching power supply can be divided into isolation and non-isolation. It is isolation type that there must be switching power supply converter, and non-isolation does not necessarily have switching power supply converter. Compared with the traditional DC power supply, the switching power supply has the advantages of small volume, light weight and high efficiency.