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US 2009/0267582 A1Published application
Self-tuning digital current estimator for low-power switching converters
AssigneeExar Corporation
InventorsAleksandar Prodic, Zdravko Lukic, Zhenyu Zhao, S. M. Ahsanuzzaman
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Abstract
A switched mode power can use a digital controller to control the switching of the at least one switch of the switched mode power supply. The current through the power inductor can be estimated using a self-tuning digital current estimator.
Claims22
A switched mode power supply comprising:
- at least one switch;
- a power inductor;
- a digital controller to control the switching of the at least one switch of the switched mode power supply;
- wherein the current power through the inductor is estimated using a self-tuning digital current estimator.
1 more element
A current estimator comprising:
- a digital filter to produce a current estimate from a voltage based input value;
- a current sink to produce an increase in the current;
- and
- calibration logic to update coefficients for the digital filter based on the current increase produced by the current sink.
1 more element
A switched mode power supply comprising:
- at least one switch;
- a power inductor;
- a digital controller to control the switching of the at least one switch of the switched mode power supply;
- wherein the current through the power inductor is estimated using a self-tuning digital current estimator;
- and wherein the self tuning uses a current sink.
2 more elements
Dependencies are inferred from the claim text.