Buck-boost DC-DC switching power conversion
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United States of America Patent
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Sep 7, 2004
Grant Date -
Feb 12, 2004
app pub date -
Aug 8, 2002
filing date -
Aug 8, 2002
priority date (Note) -
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Abstract
Apparatus operates at a power level within a range of power levels that includes a rated maximum power level of the apparatus. The apparatus includes circuit elements to deliver power at an output voltage to a load from a source at an input voltage using an inductor selectively connected between the source and the load during a power conversion cycle. The inductor conducts a current having an average positive value during the power conversion cycle. A first switching device is interposed between the source and a first terminal of the inductor. A second switching device is interposed between a second terminal of the inductor and the load. A switch controller turns ON the first switching device during a time interval within the power conversion cycle during which the current is negative.
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