Controllers and related control methods for generating signals representing an output current to a load in a switched mode power supply
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United States of America Patent
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Nov 17, 2015
Grant Date -
Jun 4, 2015
app pub date -
Dec 2, 2013
filing date -
Dec 2, 2013
priority date (Note) -
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Abstract
Controllers and related control methods for a switched mode power supply are disclosed. The switched mode power supply has an inductive device and a power switch connected in series. An output current estimator in a controller is configured for receiving a current-sense signal representing an inductor current flowing through the inductive device and a discharge-time signal indicating a discharge time of the inductive device. The output current estimator generates a charge current in response to the discharge-time signal and the current-sense signal, thereby the charge current substantially corresponding to an output current that the switched mode power supply outputs to a load. The charge current is limited not to exceed a maximum value. A current limiter is configured for limiting the current-sense signal when the charge current is the maximum value.
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