UNINTERRUPTIVE POWER SUPPLY

摘要

PROBLEM TO BE SOLVED: To provide a built-in type uninterruptive power supply for a computer operated by commercial power supply. SOLUTION: This power supply 30 is an uninterruptive power supply which supplies electric power from a working power source to a first load 202 operated by a first DC voltage 12V+ and a second DC voltage 12V- lower than the first DC voltage, and continues power supply to the first load 202 from a battery power source 36 in the case when characteristic of the working power source deviates from a specified value. A power supply unit 32 which has an output capable of being connected with the first load 202, converts a voltage of the working power source to the first DC voltage and outputs it is installed. A first voltage converter 44 which has an input capable of being connected with the battery and an output capable of being connected with the first load 202, converts the battery output voltage to the second DC voltage and outputs it is installed. The first voltage converter 44 is set standby in the state of no-load when the working power source is in a specified value.