DC-DC CONVERTER
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United States of America Patent
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Issued Date -
Apr 23, 2009
app pub date -
Oct 17, 2008
filing date -
Oct 17, 2007
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
A DC-DC converter, which controls the output voltage supplied to a load at a desired magnitude by performing on/off control of the input voltage using a switch, includes: an error amplifier for outputting the difference voltage between the output voltage and a preset reference voltage; and a plurality of phase compensation circuits for compensating the phase of the output voltage fed back to the error amplifier with different characteristics, whereby the DC-DC converter is configured such that changes in either the input voltage or in the load current flowing into the load are detected, and switching between the plurality of phase compensation circuits is performed. The frequency characteristic of each of the phase compensation circuits is determined for each of a plurality of demarcated fluctuation ranges of the input voltage or the load current.
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