| 摘要 |
A DC-DC converter includes a transformer comprising primary and secondary coils. A series connection of the primary coil and a first switch is connected in parallel to a DC power. A series connection of a second switch and a capacitor is connected to both sides of the primary coil. A first control circuit controls an ON-time of the first switch. A second control circuit controls the second switch while the second control circuit is decoupled from the first control circuit. The first and second switches alternately turn ON and OFF. The second switch turns ON synchronizing with a first time period between after a charge to the capacitor is started and until the charge to the capacitor is ended. The second switch turns OFF when a second time period previously set has been elapsed after the second switch turned ON.
|
