| 摘要 |
PURPOSE: A power circuit is provided to reduce cost and space occupation by reducing the number of DC/DC converter. CONSTITUTION: A power circuit for supplying power to a first load(30) and a second load(40), comprises a charger battery(12) for generating a battery voltage; a first DC/DC converter(10) connected to the charger battery for converting the battery voltage into a power supply voltage, and which supplies the power supply voltage to the first load during operation mode, and supplies the power supply voltage to the first load and the second load during battery charge mode; and a second DC/DC converter(20) connected to the charger battery, and which converts the battery voltage into a power supply voltage, supplies the power supply voltage to the second load during operation mode, converts an external voltage into a charge voltage, and supplies the charge voltage to the charger battery during battery charge mode.
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