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Battery charging circuit with backflow prevention transistor, portable electronic device and semiconductor integrated circuit with backflow prevention transistor
Battery charging circuit with backflow prevention transistor, portable electronic device and semiconductor integrated circuit with backflow prevention transistor
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机译:具有防逆流晶体管的电池充电电路,便携式电子设备以及具有防逆流晶体管的半导体集成电路
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摘要
A battery charging circuit is used by being connected to a direct-current power source. The battery charging circuit includes a control transistor, a backflow prevention transistor and a charging controller. The control transistor is disposed in a charging path between the direct-current power source and a battery, and is configured to control a direct-current voltage from the direct-current power source, and to output controlled direct-current voltage as a charging voltage. The backflow prevention transistor is disposed in the charging path, and is configured to output the charging voltage to the battery, and to be turned off when an electric current flows backward from the battery to the direct-current power source. The charging controller is configured to turn on the backflow prevention transistor when charging of the battery starts, and to turn on the control transistor after a fixed period of time elapses from a start of the charging.
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