DC-DC converter control circuit and DC-DC converter
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United States of America Patent
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Jan 12, 2016
Grant Date -
Nov 20, 2014
app pub date -
Mar 6, 2014
filing date -
May 17, 2013
priority date (Note) -
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Abstract
A DC-DC converter control circuit has an inductor configured to be interposed between a first node which is set to a first direct current voltage or a second direct current voltage and a second node which outputs an output voltage at a predetermined direct current voltage level, an error signal generator configured to generate an error signal depending on a voltage difference between a reference voltage and a voltage correlating with the output voltage, a ripple extractor configured to extract and output ripple components contained in the voltage of the first node, a single-ended signal generator configured to generate a single-ended signal based on the error signal and an output signal from the ripple extractor, and a switch drive unit configured to drive and control, based on the single-ended signal, a switch circuit which sets the first node to the first direct current voltage or the second direct current voltage.
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