US 12,231,037 B2
Switching power supply device
Hideki Nakata, Kanagawa (JP); and Atsushi Seki, Kanagawa (JP)
Assigned to Panasonic Automotive Systems Co., Ltd., Kanagawa (JP)
Filed by Panasonic Automotive System Co., Ltd., Kanagawa (JP)
Filed on Aug. 22, 2023, as Appl. No. 18/453,836.
Application 18/453,836 is a continuation of application No. 17/667,324, filed on Feb. 8, 2022, granted, now 11,770,068.
Claims priority of application No. 2021-020213 (JP), filed on Feb. 10, 2021.
Prior Publication US 2023/0396156 A1, Dec. 7, 2023
This patent is subject to a terminal disclaimer.
Int. Cl. H02M 1/42 (2007.01); H02M 1/00 (2007.01); H02M 1/36 (2007.01); H02M 7/12 (2006.01); H02M 7/155 (2006.01); H02M 7/162 (2006.01)
CPC H02M 1/4233 (2013.01) [H02M 1/0085 (2021.05); H02M 1/36 (2013.01); H02M 7/125 (2013.01); H02M 1/0083 (2021.05); H02M 7/1555 (2013.01); H02M 7/1626 (2013.01)] 19 Claims
OG exemplary drawing
 
1. A switching power supply device comprising:
a first switching element connected between a first node and a first output node;
a second switching element connected between the first node and a second output node;
a first thyristor connected between a second input node and the first output node;
a second thyristor connected between the second input node and the second output node;
a detector that detects an input voltage received via a first input node and the second input node; and
a control circuit that controls the first thyristor, the second thyristor, the first switching element, and the second switching element according to the input voltage, wherein
the control circuit maintains the second thyristor and the first switching element in an on state while maintaining the first thyristor and the second switching element in an off state in a first period in which an absolute amplitude value is equal to or less than a first threshold value within a latter half of a first half-cycle in the input voltage at startup, and maintains the first thyristor and the second switching element in an on state while maintaining the second thyristor and the first switching element in an off state in a second period in which an absolute amplitude value is equal to or less than a second threshold value within a latter half of a second half-cycle following the first half-cycle in the input voltage at startup.