Patent ID: 7053502
Filing Date: 2006-05-30
Classification: H02J

Abstract:
1. A power supply comprising: an AC/DC converter which converts an input AC power into DC power and outputs the DC power to an output terminal thereof, said AC/DC converter having power factor improvement function; a DC/DC converter having an input terminal connected to the output terminal of said AC/DC converter, said DC/DC converter converting a DC voltage inputted thereto into a voltage value to be applied to a load; a DC converter having a first terminal connected to the output terminal of said AC/DC converter and the input terminal of said DC/DC converter; and DC power storage means which is connected to a second terminal of said DC converters, and which supplies said DC/DC converter with a DC power through said DC converter; wherein said load is supplied with the DC power from said AC/DC converter through said DC/DC converter, and said DC power storage means connected to said second terminal of said DC converter is supplied with the DC power from said AC/DC converter for charging using a path through the output terminal of said AC/DC converter, the first terminal of said DC converter and said DC converter; and wherein, said DC converter comprising an actuating signal generating portion having an AND logic circuit, and said AND logic circuit is supplied with a power interruption detecting signal and an actuating command, and when the input AC power is not applied to said AC/DC converter and said actuating command is ON, said load is supplied with the DC power from said DC power storage means using a path through said second terminal, said DC converter, said first terminal and said DC/DC converter in order.