Power supply control method and portable electronic device using the same
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United States of America Patent
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Oct 10, 2017
Grant Date -
Jun 23, 2016
app pub date -
Jul 3, 2015
filing date -
Dec 22, 2014
priority date (Note) -
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Abstract
A power supply control method and a portable electronic device using the same are provided. The power supply control method includes following steps: detecting an input voltage and an input current at a power input terminal of the portable electronic device; setting a plurality of detection loads sequentially to control a power adaptor to provide a detection current as the input current for the portable electronic device respectively; calculating an equivalent input impedance of the power input terminal according to the detection current and the corresponding input voltage; calculating an actual output voltage of the power adaptor according to the equivalent input impedance, the input voltage, and the input current; and setting a work load according to the actual output voltage to control the power adaptor to provide a work current as the input current for the portable electronic device.
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