US 12,273,023 B2
Active snubber circuit and buck converter
Keisuke Kanda, Susono (JP); and Koichi Ushitani, Susono (JP)
Assigned to YAZAKI CORPORATION, Tokyo (JP)
Filed by YAZAKI CORPORATION, Tokyo (JP)
Filed on Apr. 10, 2023, as Appl. No. 18/298,325.
Claims priority of application No. 2022-077967 (JP), filed on May 11, 2022.
Prior Publication US 2023/0369967 A1, Nov. 16, 2023
Int. Cl. H02M 1/34 (2007.01); H02M 3/158 (2006.01); H02M 3/335 (2006.01)
CPC H02M 1/342 (2021.05) [H02M 3/158 (2013.01); H02M 3/33573 (2021.05)] 6 Claims
OG exemplary drawing
 
1. An active snubber circuit that is connected to a buck converter and that decreases a first surge voltage and a second surge voltage, the buck converter including a first circuit that bucks an input voltage and that generates the first surge voltage and a second circuit that includes a plurality of outputs and that generates the second surge voltage, the active snubber circuit comprising:
a first power storage element connected to an output point of the first surge voltage of the first circuit;
a first FET switch connected to the output point of the first surge voltage of the first circuit and the first power storage element;
a second power storage element connected to an output point of the second surge voltage of the second circuit;
a second FET switch connected to the output point of the second surge voltage of the second circuit and the second power storage element;
an inductor connected to a connection point, the first FET switch, and the second FET switch, the connection point positioned on an output side with respect to the output point of the second surge voltage of the second circuit; and
an element that is connected to the first FET switch, the second FET switch, the inductor, and ground and through which a forward current flows.