| 摘要 |
<p>Provided is a switching power supply circuit which can improve efficiency while reducing change in an input current. A mode controller 51 shifts, along with increase in an electric power in chopper circuits 3a and 3b, operation modes of the chopper circuits 3a and 3b from a first mode to a third mode via a second mode. An operation controller 52 causes, in the first mode, the chopper circuit 3a to perform an chopping operation, and the chopper circuit 3b to suspend the chopping operation, in the second mode, causes the chopper circuits 3a and 3b to alternatively perform the chopping operations, and in the third mode causes both of the chopper circuits 3a and 3b to perform the chopping operations.</p> |
