High frequency, miniaturization, or achievement LED switching power supply development direction in the future.

LED switching power supply will develop towards the direction of high frequency direction, as the high frequency requires miniaturization, and makes switching power supply into a wide range applications, especially in the field of high and new technology application, promoted the high-tech products of miniaturization, light change. In addition the development and application of switching power supply in the aspect of saving energy, saving resources and protecting the environment has important significance.

Diode, MOSFET and IGBT is the most commonly used inLED switching power supply to the electronic device. Thyristor in switching power input rectifier circuit and soft start circuit in the application of a small amount of power transistor driving difficult, low switching frequency, gradually replaced by MOSFET and IGBT.
 
LED switching power supply with three conditions:
 
A.  Switch: power electronics device is not working in the linear state, but work in the switch state.
B.  High frequency, power electronics device is not working in the low frequency condition, but work in high frequency condition.
C.  DC: switching power supply output is not AC , but DC .