| 摘要 |
Provided is a DC-DC converter that can reduce losses. Ein and C1 are serially connected. Q1 and Q2 are serially connected so that antiparallel diodes thereof face the same direction. A terminal of C1 that is not connected to Ein and a terminal of Q2 that is not connected to Q1 are connected. A terminal of Ein that is not connected to C1 and a terminal of Q1 that is not connected to Q2 are connected. A coil N1 of T is connected between a connection point of Ein and C1 and a connection point of Q1 and Q2. Among a pair of terminals of a coil N2, a terminal having the same polarity as a terminal the coil N1 that is connected to Ein is connected to the connection point of C1 and Q2 through D1 and the other terminal is connected to the connection point of Ein and C1. A coil N3 is connected to a smoothing circuit through a rectification circuit. The direction of D1 is set in such a manner that energy can be transferred to C1 from the coil N2 when Q1 is in a conduction state. The rectification circuit applies a voltage of the same polarity to the smoothing circuit in both case where Q1 is in a conduction state and Q2 is in a conduction state. |
