US 12,355,340 B2
Comparison signal generator for power converter
Marco Flaibani, Montegrotto Terme (IT); Stefano Zampieri, Padua (IT); and Giovanni Bisson, Padua (IT)
Assigned to Infineon Technologies AG, Neubiberg (DE)
Filed by Infineon Technologies AG, Neubiberg (DE)
Filed on Apr. 27, 2023, as Appl. No. 18/308,151.
Prior Publication US 2024/0364207 A1, Oct. 31, 2024
Int. Cl. H02M 3/158 (2006.01); H02M 1/08 (2006.01); H02M 3/157 (2006.01); H03K 5/24 (2006.01)
CPC H02M 1/08 (2013.01) [H02M 3/157 (2013.01); H02M 3/158 (2013.01); H03K 5/24 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A circuit comprising:
a switching signal generator configured to control, using a switching signal, a switching element to provide current to charge an inductive element of a power converter;
synchronization circuitry configured to determine a first time of a switching period based on the switching signal;
a comparison signal generator configured to generate a comparison signal with a first constant rate of change after the first time;
wherein the synchronization circuitry is further configured to determine a second time of the switching period based on when current at the inductive element changes from a positive current to a negative current;
wherein the comparison signal generator is further configured to generate the comparison signal with a second constant rate of change after the second time; and
a threshold detector configured to compare a value of the comparison signal at the end of a target switching period with a threshold value, wherein the target switching period is initiated at the first time.