Power supply control device and power supply control method for controlling switching device of boost chopper
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United States of America Patent
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May 31, 2022
Grant Date -
Jan 14, 2021
app pub date -
Sep 27, 2020
filing date -
Oct 4, 2018
priority date (Note) -
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Abstract
A power supply control device includes a switch control unit configured to control ON/OFF of a switching device of a boost chopper by using an oscillation wave, a comparison voltage generating unit configured to charge or discharge comparison capacitor that generates a comparison voltage for comparison with the oscillation wave in correspondence with a DC output voltage outputted from the boost chopper, an input increase detecting unit configured to detect whether a detection value corresponding to current flowing through the boost chopper has increased to or above a detection criterion, an output voltage detecting unit configured to detect whether the DC output voltage is at or above the lower limit voltage, a discharging unit configured to discharge the comparison capacitor when the detection value has increased to or above the detection criterion and the DC output voltage is at or above the lower limit voltage.
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