POWER SUPPLY WITH IMPROVED SYSTEM EFFICIENCY

摘要

PURPOSE: A power supply device with increased system efficiency is provided to supply standby voltage by using main voltage, thereby enhancing the system efficiency which supplies standby voltage. CONSTITUTION: A standby stage(200) converts DC voltage into a predetermined operation voltage and a first standby voltage. The standby stage provides the first standby voltage to a standby output side. A DC/DC stage(300) receives operation voltage from the standby stage. The DC/DC stage converts the DC voltage into a predetermined main voltage.