| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a power circuit which suppresses a current from continuing to flow from a secondary battery when a voltage of the secondary battery has dropped below a predetermined value. <P>SOLUTION: According to an embodiment, a power circuit 30 starts supplying a current to an over-discharge protection circuit 6, a logic circuit 8, and a power supply control circuit 9 from a rechargeable battery when a connection switch 5 switches to a state of being connected the circuit, maintains current supply to the over-discharge protection circuit 6, the logic circuit 8, and the power supply control circuit 9 and starts supplying a current to a load circuit 10 from the rechargeable battery by supplying a current from the power supply control circuit 9 to the load circuit 10 when the connection switch 5 switches to a state of not being connected to the circuit during the current supply, and maintains a halt state when the voltage of the rechargeable battery drops during current supply to the load circuit 10 and the over-discharge protection circuit 6 stops supplying a current from the rechargeable battery to the load circuit 10. <P>COPYRIGHT: (C)2012,JPO&INPIT |
