Method and apparatus for reducing power consumption for power supplied by a voltage adapter
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United States of America Patent
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Jun 22, 2004
Grant Date -
Jan 1, 2004
app pub date -
Jun 27, 2002
filing date -
Jun 27, 2002
priority date (Note) -
Expired
status (Latency Note)
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Abstract
Power consumption is reduced for power supplied by a voltage adapter, such as an AC/DC adapter. A power source is connected to a power unit, including the voltage adapter and control circuitry. The voltage adapter supplies power to a load, such as a computer system. A load current supplied by the voltage adapter and an output voltage of the voltage adapter are measured by the control circuitry, and a control device of the control circuitry selectively disconnects the voltage adapter from the power source. The disconnecting is responsive to the control circuitry inferring from the measured current and voltage that the load is turned off, or at least operating in a reduced power consumption mode.
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