US 12,068,694 B2
Integrated circuit and power supply device
Yuta Endo, Matsumoto (JP); and Takato Sugawara, Matsumoto (JP)
Assigned to FUJI ELECTRIC CO., LTD., Kawasaki (JP)
Filed by FUJI ELECTRIC CO., LTD., Kawasaki (JP)
Filed on Mar. 24, 2022, as Appl. No. 17/703,712.
Application 17/703,712 is a continuation of application No. PCT/JP2021/008510, filed on Mar. 4, 2021.
Claims priority of application No. 2020-072964 (JP), filed on Apr. 15, 2020.
Prior Publication US 2022/0216797 A1, Jul. 7, 2022
Int. Cl. H02M 3/335 (2006.01); H02M 1/08 (2006.01); H02M 1/42 (2007.01)
CPC H02M 3/33571 (2021.05) [H02M 1/08 (2013.01); H02M 1/4208 (2013.01)] 9 Claims
OG exemplary drawing
 
1. An integrated circuit for a power supply circuit that includes a transistor and generates an output voltage of a target level, the integrated circuit being configured to switch the transistor, the integrated circuit comprising:
a first terminal configured to receive a voltage according to the output voltage;
a signal detection circuit configured to detect, through the first terminal, a setting signal received from an external circuit that operates based on the output voltage; and
a driver circuit configured to drive the transistor in response to the setting signal detected by the signal detection circuit, wherein
the driver circuit is configured to operate in an operation mode,
the setting signal has a pulse width that varies with the operation mode of the driver circuit, and
the signal detection circuit detects the setting signal based on the pulse width of the setting signal.