US 12,308,749 B2
Low power consuming integrated circuit for power supply circuit
Hiroaki Matsumoto, Matsumoto (JP); Masayuki Yamadaya, Matsumoto (JP); and Yoshinori Kobayashi, Matsumoto (JP)
Assigned to FUJI ELECTRIC CO., LTD., Kawasaki (JP)
Filed by FUJI ELECTRIC CO., LTD., Kawasaki (JP)
Filed on Jun. 22, 2022, as Appl. No. 17/846,849.
Claims priority of application No. 2021-130683 (JP), filed on Aug. 10, 2021.
Prior Publication US 2023/0051610 A1, Feb. 16, 2023
Int. Cl. H02M 3/335 (2006.01); H02M 1/00 (2006.01); H02M 1/08 (2006.01); H02M 1/32 (2007.01)
CPC H02M 3/33569 (2013.01) [H02M 1/0032 (2021.05); H02M 1/08 (2013.01); H02M 1/32 (2013.01)] 20 Claims
OG exemplary drawing
 
1. An integrated circuit for a power supply circuit configured to generate an output voltage at a target level, the power supply circuit including
a power transistor, the integrated circuit being configured to switch and drive the power transistor, and
a first switch configured to be turned on and off in response to an instruction signal instructing an operation mode of the integrated circuit, the operation mode including a first mode and a second mode, a power consumption in the second mode being greater than a power consumption in the first mode,
the integrated circuit comprising:
a first terminal to which the first switch is coupled;
a first determination circuit configured to determine, based on a voltage level at the first terminal, whether to operate the integrated circuit in the first mode or the second mode;
a first power supply voltage generation circuit configured to
stop generating a first power supply voltage when the integrated circuit operates in the first mode, and
generate the first power supply voltage when the integrated circuit operates in the second mode; and
a driver circuit configured to receive the first power supply voltage, to thereby switch and drive the power transistor.