Adaptive low-power zero-cross comparator for discontinuous current mode operated switching mode power supply
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United States of America Patent
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May 17, 2016
Grant Date -
Nov 20, 2014
app pub date -
May 16, 2013
filing date -
May 16, 2013
priority date (Note) -
Withdrawn
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Abstract
A time off estimator and an adaptive controller implemented on an integrated circuit to emulate current dependent zero crossing circuitry to permit improved performance of a buck type switching mode power supply. The time off estimator circuit is enhanced by an automatic correction circuit for the timing of a zero crossing where energy to a reference capacitor returns to zero and is turned off awaiting the next cycle where the capacitor is again charged and discharged.
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