US 12,407,255 B2
Switching power supply circuit and switching power supply system having the same
Saiki Shigemori, Tokyo (JP); and Akihiro Unno, Tokyo (JP)
Assigned to TDK CORPORATION, Tokyo (JP)
Filed by TDK Corporation, Tokyo (JP)
Filed on Aug. 7, 2023, as Appl. No. 18/366,328.
Claims priority of application No. 2022-130976 (JP), filed on Aug. 19, 2022.
Prior Publication US 2024/0063718 A1, Feb. 22, 2024
Int. Cl. H02M 3/158 (2006.01); H02M 1/00 (2006.01); H02M 1/08 (2006.01); H02M 3/157 (2006.01)
CPC H02M 3/158 (2013.01) [H02M 1/0009 (2021.05); H02M 1/082 (2013.01); H02M 3/157 (2013.01)] 6 Claims
OG exemplary drawing
 
1. A switching power supply circuit comprising:
a switching circuit having an input node connected to an input power supply terminal and an output node connected to an output power supply terminal through an output switch;
a feedback circuit configured to feed back information based on a voltage appearing at the output node to the switching circuit; and
an activation circuit configured to turn ON the output switch after an elapse of a predetermined time after a voltage appearing at the output node exceeds a predetermined value,
wherein the switching circuit is configured to adjust a level of a voltage appearing at the output node based on the information to a predetermined level, and
wherein the feedback circuit includes an adjustment mechanism configured to adjust a relation between a voltage appearing at the output node and the information.