Single-inductor buck-boost converter with positive and negative outputs
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United States of America Patent
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Issued Date -
Feb 18, 2010
app pub date -
Aug 12, 2008
filing date -
Aug 12, 2008
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
A single-inductor power converter with buck-boost capability provides regulated bipolar output voltage to a positive and a negative load. A five-switch bridge topology allows a controller to direct the inductor current to the appropriate outputs or circuit ground as needed to maintain regulation. The controller also adjusts the inductor current level for proper output voltage regulation. The five-switch bridge topology makes possible a wide range of ratios between the positive and negative output currents of the converter.
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