| 摘要 |
PROBLEM TO BE SOLVED: To provide a constant current charger capable of shortening a total charging time of a secondary battery even when internal impedance of the secondary battery becomes high.SOLUTION: The constant current charger includes: a charge completion voltage detector; a battery voltage reduction detector; an up-down counter for outputting data by adding data when receiving a detection signal of the charge completion voltage detector and subtracting data when receiving a detection signal of the battery voltage reduction detector; and a constant current generation circuit for changing a charge current for the secondary battery in accordance with data output by the up-down counter.SELECTED DRAWING: Figure 1 |
