| 摘要 |
<p>PROBLEM TO BE SOLVED: To confirm a connection state of a power storage device without causing cost increase or increase of a component procurement load.SOLUTION: Increase and decrease of control current Itc, which flows into a charge current generating transistor QT used in a constant current charge circuit 14 of a power backup device 10, is monitored by a power storage device connection confirmation circuit 15. A connection confirmation signal CDET indicating connection presence of a power storage device 20 according to the monitored result.</p> |
