Rohm Co., Ltd.

Hiroaki Sawaoka

Satoru Nate

Yoshinori Sato

Yohei Akamatsu

There is provided a power supply controller including: a monitor voltage generation part configured to generate a monitor voltage according to a primary voltage of a transformer that forms an insulated switching power supply; a sample/hold part configured to sample/hold the monitor voltage and output a feedback voltage; and a controller configured to turn on/off a primary current of the transformer by a fixed on-time method according to the feedback voltage, wherein the sample/hold part samples/holds the primary voltage at a plurality of different timings and outputs one of a plurality of hold values as the feedback voltage.

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Kyoto, Japan

Hiroaki Sawaoka