| 摘要 |
The amount of power generated by a solar cell is used for charging more efficiently. An activation determination means 4 activates a charging control circuit 3 by allowing a maximum output current from a solar cell 1 to a GND potential to flow and detecting that the output current is equal to or greater than current consumption of the charging control circuit 3 instead of monitoring an unstable output voltage from the solar cell 1. Thus, the charging control circuit 3 can be activated more precisely in comparison to a case where an output voltage is monitored under the condition that the charging control circuit 3 is operated only by the amount of power generated by the solar cell. Thereby, a power instrument 2 is charged more efficiently with the amount of power generated by the solar cell. |
