US 12,249,917 B2
Method and apparatus for over-current protection and CrCM control in power converters
Anders Lind, San Juan Capistrano, CA (US)
Assigned to SEMICONDUCTOR COMPONENTS INDUSTRIES, LLC, Scottsdale, AZ (US)
Filed by SEMICONDUCTOR COMPONENTS INDUSTRIES, LLC, Scottsdale, AZ (US)
Filed on Nov. 11, 2021, as Appl. No. 17/524,126.
Claims priority of provisional application 63/114,139, filed on Nov. 16, 2020.
Prior Publication US 2022/0158561 A1, May 19, 2022
Int. Cl. H02M 3/158 (2006.01); H02M 1/00 (2006.01); H02M 1/08 (2006.01); H02M 1/32 (2007.01); H02M 1/42 (2007.01); H02M 7/219 (2006.01)
CPC H02M 3/1588 (2013.01) [H02M 1/0009 (2021.05); H02M 1/083 (2013.01); H02M 1/32 (2013.01); H02M 1/42 (2013.01); H02M 1/4225 (2013.01); H02M 7/219 (2013.01); H02M 1/4233 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A power converter comprising:
an input coupled to an inductor;
a first switch coupled to a first comparator;
a second switch coupled to a second comparator;
a pulse comparison counter coupled to the first comparator and the second comparator; and
a synchronous rectifier (SR) calculator coupled to the pulse comparison counter;
wherein the SR calculator is operable to:
modify a conduction time of the first switch during a first AC half-cycle; and
modify a conduction time of the second switch during a second AC half-cycle.