| 摘要 |
A power supply system installed in a portable electronic apparatus includes a plurality of receiving ends, a selection unit, a power control unit, and a power converting unit. The plurality of receiving ends is coupled to a plurality of power sources of the portable electronic apparatus. The selection unit is coupled to the plurality of receiving ends for selecting an input power from the plurality of power sources. The power control unit is utilized for generating an output power control signal according to an input signal. The power converting unit is utilized for converting the input power into an output power to a power port according to the output power control signal.
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