US 11,962,249 B2
Multi-level power converter architecture
Eslam Abdelhamid, Villach (AT); and Juan Sanchez, Villach (AT)
Assigned to Infineon Technologies Austria AG, Villach (AT)
Filed by Infineon Technologies Austria AG, Villach (AT)
Filed on Jun. 21, 2022, as Appl. No. 17/845,879.
Prior Publication US 2023/0412090 A1, Dec. 21, 2023
Int. Cl. H02M 7/483 (2007.01); H02M 1/00 (2006.01)
CPC H02M 7/4837 (2021.05) [H02M 1/0025 (2021.05)] 20 Claims
OG exemplary drawing
 
1. An apparatus comprising:
a multi-level power converter configured to convert an input voltage to an output voltage, wherein the multi-level power converter comprises one or more switching groups, wherein a switching group of the one or more switching groups comprises a pair of switches and a flying capacitor; and
a controller configured to determine a duty reference for the switching group, determine a duty correction factor for the switching group based upon a flying capacitor voltage error of the flying capacitor, determine a sign correction signal based on a flying capacitor ripple voltage, and determine a duty command for activating the pair of switches based on the duty reference, the duty correction factor, and the sign correction signal.