Pegatron Corporation

Yu-Kai Shen

Chih-Wei Huang

Hsiao-Wei Sung

Chun-Wei Ko

The application discloses a power supply circuit and a power supply device. A drain of a first N-type metal-oxide-semiconductor field-effect transistor (MOSFET) receives a first input voltage. A filter is coupled to a source of the first N-type MOSFET and is configured to output an output voltage. A non-inverting input terminal of an operational amplifier is coupled to a ground terminal through a first capacitor. A control circuit is coupled to an inverting input terminal of the operational amplifier. One terminal of a switch is coupled to a gate of the first N-type MOSFET, and the other terminal is switchably coupled to the control circuit or an output terminal of the operational amplifier, so that the gate of the first N-type MOSFET is switched to be coupled to the control circuit or the output terminal of the operational amplifier.

Growing community of inventors

Taipei, Taiwan

Yu-Kai Shen