Patent attributes
The present disclosure aims to reduce the changes that a control unit receiving power supplied from a power supply cannot perform control of a precharge operation even if the power supply voltage drops. In a power supply device, a reverse-flow prevention switching element is configured such that a plurality of semiconductor switching elements are connected in parallel with each other. The control unit, in accordance with a predetermined precharge condition being fulfilled, causes the second voltage conversion unit to perform the second voltage conversion operation by supplying a second control signal for switching to an ON signal and an OFF signal alternately to only some of the plurality of semiconductor switching elements constituting the reverse-flow prevention switching element.
