| 摘要 |
PROBLEM TO BE SOLVED: To provide an improved power factor switching power supply circuit dealing with heavy load in a single range of AC 100V system in which the power conversion efficiency is enhanced while reducing the size, weight and cost. SOLUTION: The improved power factor switching power supply circuit 10 comprises components for improving the power factor by a system where the switching output of a current resonance switching converter in the post-stage is fed from a primary DC resonance circuit back to a quadruple voltage rectifier circuit. The current resonance switching converter employs half bridge coupling system comprising two transistor switching element. |
