| 摘要 |
PROBLEM TO BE SOLVED: To provide a power source circuit capable of charging a storage element by preventing the operation of the protecting circuit of a battery. SOLUTION: This power source circuit 100 is provided with 3 battery 200 having a protecting circuit 210, a storage element 10, a first switching element SW1 for connecting the battery 200 to the storage element 10, a second switch SW2 for connecting the battery 200 through a resistance 21 to the storage element 10, and a charging control circuit 30 for controlling the charging of the storage element 10. When a terminal voltage Vc of the storage element 10 is less than a reference voltage Vref, the charging control circuit 30 turns on/off the first switching element SW1 in order to prevent the hit operation of the protecting circuit 210 in a state that the second switch SW2 is turned off so that the storage element 10 can be intermittently charged. When the terminal voltage Vc of the storage element 10 is not less than the reference voltage Vref, the charging control circuit 30 turns on the second switch SW2 in a state that the first switching element SW1 is turned off so that the storage element 10 can be continuously charged.
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