| 摘要 |
A circuit that includes a combination of a current resonance type converter of a switching frequency controlling system with a partial-voltage resonance circuit is configured such that, in order to improve the power factor where the load power is 150 W or more and the circuit employs an input double-voltage rectification system, a series resonance capacitor or inductor is connected in series to a tertiary winding wound on the primary side of an isolation converter transformer, so that the voltage is fed back to a rectification circuit composed of a high-speed recovery type diode.
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