US 12,218,580 B2
Surge protection and failsafe circuit for DC-DC converter
Rajkumar Sengodan, TamilNadu (IN); and Ann Freida F, Karnataka (IN)
Assigned to HAMILTON SUNDSTRAND CORPORATION, Charlotte, NC (US)
Filed by Hamilton Sundstrand Corporation, Charlotte, NC (US)
Filed on Aug. 24, 2023, as Appl. No. 18/455,089.
Claims priority of application No. 202311043328 (IN), filed on Jun. 28, 2023.
Prior Publication US 2025/0007391 A1, Jan. 2, 2025
Int. Cl. H02M 1/32 (2007.01); H02J 3/38 (2006.01); H02M 1/44 (2007.01); H02M 3/158 (2006.01)
CPC H02M 1/325 (2021.05) [H02J 3/381 (2013.01); H02M 1/44 (2013.01); H02M 3/158 (2013.01); H02J 2310/44 (2020.01)] 18 Claims
OG exemplary drawing
 
1. A Direct Current (DC)-DC converter comprising:
an input capacitor connected across a positive input terminal and a return input terminal;
a DC-DC converter circuit connected across the positive input terminal and the return input terminal;
a current limiting failsafe circuit including a current limiting portion connected across the positive input terminal and the return input terminal, and a failsafe portion connected to a sensed voltage output, the failsafe portion being configured to control a current limit function of the current limiting portion and configured to force the DC-DC converter circuit into an off state in response to retripping of the current limiting portion.