| 摘要 |
PROBLEM TO BE SOLVED: To accurately set charging current to individual charging batteries using configurations, with a single feedback type charging voltage correction circuit, in a parallel charging type for charging a plurality of the charging batteries in parallel. SOLUTION: A charger includes charge control transistors 43, 44 connected in an emitter follower structure, and connected at an emitter to input terminals of charging terminals 21, 22 via resistors 45, 46 for setting charging current. A shunt regulator IC 50 for feedback controlling the emitter output only for one of two charge control transistors 43, 44 is provided. This feedback voltage output is input to bases of the two charge control transistors 43, 44, thereby correcting the changes in the emitter voltage due to the change, etc., due to temperature changes, etc. in the circumference of the respective charging transistors 43, 44, and accurately controlling the charging currents to the respective charging batteries 11. COPYRIGHT: (C)2005,JPO&NCIPI
|
