US 12,463,556 B2
Rectifier control with adaptive turn-off
Jim Le, Fort Collins, CO (US); John Walley, Ladera Ranch, CA (US); and Marc Keppler, Windsor, CO (US)
Assigned to Avago Technologies International Sales Pte. Limited, Singapore (SG)
Filed by Avago Technologies International Sales Pte. Limited, Singapore (SG)
Filed on Jul. 25, 2022, as Appl. No. 17/872,341.
Prior Publication US 2024/0030832 A1, Jan. 25, 2024
Int. Cl. H02M 7/5387 (2007.01); H02M 1/00 (2006.01); H02M 1/088 (2006.01)
CPC H02M 7/53873 (2013.01) [H02M 1/0009 (2021.05); H02M 1/088 (2013.01)] 17 Claims
OG exemplary drawing
 
1. A circuit comprising:
a first field effect transistor (FET);
a first comparator configured to detect a current through the first FET;
a second FET;
a second comparator configured to detect a current through the second FET;
a timer configured to set the first FET and the second FET into an off state after a time TMAX elapses; and
a control circuitry, wherein the control circuitry is configured to:
set TMAX to a value greater than a switching cycle of a rectifier; and
iteratively reduce the TMAX until a value is identified that sets the first FET and the second FET into the off state before the first comparator detects that current through the first FET has stopped.