US Patent No. 10,433,378

POWER CONVERTER CONTROL USING CALCULATED AVERAGE CURRENT


Patent No. 10,433,378
Issue Date October 01, 2019
Title Power Converter Control Using Calculated Average Current
Inventorship Paolo Del Croce, Villach (AT)
Albino Pidutti, Villach (AT)
Andrea Baschirotto, Tortona (IT)
Assignee Infineon Technologies AG, Neubiberg (DE)

Claim of US Patent No. 10,433,378

1. A controller circuit for a buck converter configured to supply a set of light emitting diodes (LEDs), the controller circuit being configured to:drive a switching element to establish a channel that electrically couples a source to an inductive element of the buck converter during an on state for a current switching period;
in response to driving the switching element to establish the channel, generate a minimum current sample corresponding to measured current at the switching element;
in response to current at the switching element exceeding a target peak current threshold of a set of control parameters for the buck converter:
drive the switching element to refrain from establishing the channel that electrically couples the source to the inductive element during an off state for the current switching period;
generate a peak current sample corresponding to measured current at the switching element;
calculate a mean current using the minimum current sample and the peak current sample; and
modify the set of control parameters for the buck converter using the mean current; and
in response to the switching element satisfying an off time of the set of control parameters during the off state for the current switching period, drive the switching element to establish the channel that electrically couples the source to the inductive element during an on state for a subsequent switching period.