SWITCHING POWER SUPPLY DEVICE AND METHOD FOR STARTING SAME

摘要

Standby power loss is reduced. A switching power supply device uses a first power supply circuit (11) having a small output and a second power supply circuit (12) having a large output. The first power supply circuit (11) is constantly in an operation status, and the second power supply circuit (12) is started by using power generated by the first power supply circuit (11).