US 11,811,308 B2
Multi-phase power factor correction system, controller and method of controlling a multiphase power factor correction system
Andrey Malinin, Fort Collins, CO (US); and Renato Bessegato, Oberhaching (DE)
Assigned to Infineon Technologies Austria AG, Villach (AT)
Filed by Infineon Technologies Austria AG, Villach (AT)
Filed on Jan. 31, 2022, as Appl. No. 17/588,815.
Prior Publication US 2023/0246542 A1, Aug. 3, 2023
Int. Cl. H02M 1/42 (2007.01); H02M 1/12 (2006.01)
CPC H02M 1/4225 (2013.01) [H02M 1/4216 (2013.01); H02M 1/12 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A controller for a PFC (power factor correction) system having a plurality of phases for delivering current to a load, the controller comprising a digital circuitry configured to:
calculate a delay value based on a positive current slope and a negative current slope for a first phase of the plurality of phases which is enabled for all load current conditions; and
in response to an increase in an average current reference, enable a second phase of the plurality of phases such that a current output by the second phase is out of phase with a current output by the first phase by an amount corresponding to the delay value as referenced to a beginning of a boost charging portion of a switching cycle for the first phase.