US 11,817,773 B2
Systems and methods of adjusting slope compensation
Vaclav Drda, Valasska Bystrice (CZ); and Roman Stuler, Karolinka (CZ)
Assigned to SEMICONDUCTOR COMPONENTS INDUSTRIES, LLC, Scottsdale, AZ (US)
Filed by SEMICONDUCTOR COMPONENTS INDUSTRIES, LLC, Phoenix, AZ (US)
Filed on Apr. 20, 2020, as Appl. No. 16/852,766.
Prior Publication US 2021/0328499 A1, Oct. 21, 2021
Int. Cl. H02M 1/12 (2006.01); H02M 1/08 (2006.01); H02M 1/00 (2006.01)
CPC H02M 1/12 (2013.01) [H02M 1/08 (2013.01); H02M 1/0009 (2021.05)] 20 Claims
OG exemplary drawing
 
1. A method comprising:
operating a switching power converter comprising a charge control switch and a circuit controller, the charge control switch configured to control power flow through the switching power converter;
measuring, by the circuit controller, an attribute of duty cycle of a first period of the charge control switch;
measuring, by the circuit controller, an attribute of duty cycle of a second period of the charge control switch;
measuring, by the circuit controller, an attribute of duty cycle of a third period of the charge control switch;
determining, by the circuit controller, that the switching power converter is experiencing subharmonic oscillation based on the attributes of duty cycle of the first, second, and third periods of the charge control switch; and
changing, by the circuit controller, an attribute of slope compensation responsive to the determining that the switching power converter is experiencing subharmonic oscillation.