| 摘要 |
PROBLEM TO BE SOLVED: To provide a DC/DC converter capable of preventing occurrence of an excessive surge current at switching, regardless a state of loads. SOLUTION: The DC/DC converter outputs a DC input voltage of an input terminal to an external load from an output terminal as a power of specified output voltage. Commutation diodes DU and DL are connected in parallel to main switching transistors SU and SL, respectively, that constitute a bridge circuit to be connected in series for power control and to be alternately turned on and off. One end of a main reactor L is connected to the connection point of both main switching transistors SU and SL, with the other end of the main reactor L connected to an output terminal. A first auxiliary circuit in which a resonance capacitor CU and a first switch Sc are connected in series is connected in parallel to the main switching transistor SU and/or SL. A second auxiliary circuit in which an auxiliary reactor Lr is connected in series to a second switch Sr is connected in parallel to the main reactor L. COPYRIGHT: (C)2009,JPO&INPIT
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