POWER SUPPLY DEVICE, POWER SUPPLY-SWITCHING DEVICE, AND COMPUTER

摘要

PROBLEM TO BE SOLVED: To obtain a power supply device, a power supply-switching device, and a computer for reducing power loss and at the same time costs. SOLUTION: The number of FETs for switching a power supply that are provided in an internal circuit 120 is reduced by using FETs that are in protection circuits 110A and 110B being provided at a main battery 64A and a second battery 64B and are not shown in a figure as FETs for switching a power supply that switch a power supply path to a DC-DC converter 66 from the main battery 64A and the second battery 64B.