High efficiency power factor improvement switching power supply by complex resonant type converter (3)

摘要

Complex voltage complex resonant type switching converter circuit, which has current resonant circuit and partial voltage resonant circuit in its own primary side, enables extremely high efficiency in power conversion. We have developed this complex resonant converter circuit to reduce harmonic distortion, power factor improvement power supply by voltage feedback from. By using two of the fast recovery diodes with the complex resonant type converter power supply's primary resonant voltage from loose coupled transformer, which feedbacks to the AC rectify capacitor. This circuit are all one-converter from and improves the power factor up to 0.8, applied for power supply of PDP television by having high efficiency, low cost small sized, and light.