| 摘要 |
PROBLEM TO BE SOLVED: To make a control operation for soft switching appropriate to apply soft switching without making a current ripple excessive in a DC-DC converter including an auxiliary resonant circuit for applying soft switching. SOLUTION: A DC-DC converter circuit 100 includes a main converter circuit 110 for executing DC power conversion by on/off control of main switching elements Q1, Q2 and the auxiliary resonant circuit 120 for performing soft switching of the main switching elements Q1, Q2. A control unit 150 generates a drive signal for controlling on/off of switching element Q1 to Q4 so that the control operation for soft switching varies according to an operation state of a converter based on at least one of an input voltage V1, an output voltage V2, and an input current I1. COPYRIGHT: (C)2011,JPO&INPIT |
