Patent ID: 6980446

Claim:
A method for starting a power source apparatus that comprises an AC/DC conversion circuit ( 40 ) that converts an AC voltage provided by a power source ( 1 ) to a first DC voltage while operating, and a DC/DC conversion circuit ( 50 ) that converts the first DC voltage that said AC/DC conversion circuit outputs, to a second DC voltage, while operating, by using an element to be charged ( 63 ) for backup and an energy supply circuit ( 64 ) that supplies the energy that the power source generates to the element to be charged ( 63 ), characterized by carrying out: an initial charging processing that charges by supplying energy that said power source ( 1 ) generates to the element to be charged ( 63 ), using the energy supply circuit ( 64 ) from the time that said power source ( 1 ) is applied; a first starting processing that starts said AC/DC conversion circuit ( 40 ) to operate by supplying the energy accumulated in the element to be charged ( 63 ) to the AC/DC conversion circuit ( 40 ), in a case where it is detected that a predetermined energy is charged to said element to be charged ( 63 ); an output voltage detection processing that detects that said first DC voltage is output, by said AC/DC conversion circuit ( 40 ) operating, and a second starting processing that starts said DC/DC conversion circuit ( 50 ) to operate by supplying the energy accumulated in said element to be charged ( 63 ) to the DC/DC conversion circuit ( 50 ), after it is detected that the AC/DC conversion circuit ( 40 ) output said first DC voltage.