Switching power supply circuit and electronic device including switching power supply circuit

Abstract

To provide a switching power supply circuit that can reduce an amount of a radiated electromagnetic noise even in a case of a jitter in a load, a set voltage, or the like. The switching power supply circuit includes: a pulse width control unit configured to control a pulse width of a pulse voltage output from a switching transistor; a drive voltage control unit configured to control a drive voltage for determining a magnitude of the pulse voltage output from the switching transistor; and a weighting factor calculation unit configured to determine a weighting factor for the pulse width and a weighting factor for the drive voltage based on a difference value between a set output voltage value set in advance for a power supply circuit and a measured output voltage value, which is a result of measuring an output voltage of the power supply circuit, and the set output voltage value.

Dependencies are inferred from the claim text.