US 12,273,018 B2
Power supply circuit and switching control circuit
Masashi Akahane, Matsumoto (JP)
Assigned to FUJI ELECTRIC CO., LTD., Kawasaki (JP)
Filed by FUJI ELECTRIC CO., LTD., Kawasaki (JP)
Filed on Jul. 28, 2022, as Appl. No. 17/876,275.
Application 17/876,275 is a continuation of application No. PCT/JP2021/023386, filed on Jun. 21, 2021.
Claims priority of application No. 2020-134007 (JP), filed on Aug. 6, 2020.
Prior Publication US 2022/0368211 A1, Nov. 17, 2022
Int. Cl. H02M 1/00 (2007.01); G05F 3/18 (2006.01); H02M 1/08 (2006.01); H02M 1/36 (2007.01)
CPC H02M 1/0006 (2021.05) [H02M 1/08 (2013.01); G05F 3/185 (2013.01); H02M 1/36 (2013.01)] 12 Claims
OG exemplary drawing
 
12. A power supply circuit configured to generate an output voltage at a target level from an input voltage thereof, the power supply circuit having a predetermined node therein, and comprising:
a wiring configured to receive the input voltage;
a variable resistor provided between the wiring configured to receive the input voltage and the predetermined node;
a voltage generation circuit configured to apply a voltage at a predetermined level to the predetermined node based on a current from the variable resistor;
an output circuit configured to output the output voltage at the target level, in response to the voltage at the predetermined level being applied to the predetermined node; and
an adjustment circuit configured to increase a resistance value of the variable resistor such that the current flowing from the variable resistor to the predetermined node decreases, in response to a predetermined time period having elapsed since starting of generation of the output voltage.