CONTROL SYSTEM AND METHOD FOR SHARED INDUCTOR REGULATOR
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United States of America Patent
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N/A
Issued Date -
Jun 6, 2013
app pub date -
Mar 22, 2012
filing date -
Dec 1, 2011
priority date (Note) -
Abandoned
status (Latency Note)
Importance
Abstract
A control system and method for a shared inductor regulator. The regulator includes an inductor and multiple switches to selectively couple the inductor to output, reference and charge nodes. The charge node may be coupled to a battery. An input switch may be included to selectively couple the inductor to a source node. A controller controls the switches to regulate output voltage, charge current, and a source voltage when provided. The inductor current is sensed and used to regulate the output voltage, and to regulate either the charge current or the input voltage. When an external source provides sufficient power, the charging current is regulated. When the source reaches a maximum power set point, the input voltage is maintained at a minimum level. When the source provides insufficient power, the battery is used to add power or to provide sole power.
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