US 12,267,004 B2
Methods and systems of power-factor-correction converters
Hyunchul Eum, Chandler, AZ (US); and Giyoung Chun, Goyang (KR)
Assigned to SEMICONDUCTOR COMPONENTS INDUSTRIES, LLC, Scottsdale, AZ (US)
Filed by SEMICONDUCTOR COMPONENTS INDUSTRIES, LLC, Phoenix, AZ (US)
Filed on Feb. 15, 2023, as Appl. No. 18/169,656.
Prior Publication US 2024/0275272 A1, Aug. 15, 2024
Int. Cl. H02M 1/42 (2007.01)
CPC H02M 1/4208 (2013.01) 20 Claims
OG exemplary drawing
 
1. A method of operating a power converter, the method comprising:
charging a first-phase inductance of a first boost converter, and then discharging the first-phase inductance through a first diode, the charging and discharging defines a first switching period of the first boost converter;
asserting, during the first switching period, a sync-two signal based on a duration of a prior switching period of the first boost converter and an offset value;
asserting, during the first switching period, a valley-two signal when current through a second-phase inductance of a second boost converter reaches a predetermined valley current;
responsive to the assertion of the sync-two signal and the valley-two signal, charging the second-phase inductance, and then discharging the second-phase inductance through a second diode, the charging and discharging of the second-phase inductance defines a first switching period of the second boost converter; and
responsive to relative timing of the assertion of the sync-two signal and assertion of the valley-two signal, modifying the offset value.