| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a power supply circuit that makes it possible to continuously use power supply equipment for a notebook computer or the like as an object of power supply even when power cannot be supplied from an external power source and a secondary battery has been overdischarged and requires replacement or recharge. <P>SOLUTION: The power supply circuit 2a supplies power to a load circuit 6 and includes: multiple power supply units (secondary battery 8, electric storage device 9) that supply power for driving the load circuit 6; and a charge/discharge control circuit 5a. When any one of the power supply units is selected to control power supply to the load circuit 6 and power supply by the selected power supply unit is interrupted, the control circuit selects another power supply unit to continue power supply to the load circuit 6. <P>COPYRIGHT: (C)2009,JPO&INPIT</p> |
