Nuvoton Technology Corporation Japan

Panasonic Semiconductor Solutions Co., Ltd.

Tetsuya Mihashi

Takuya Ishii

Takashi Ryu

Ginga Katase

Junji Ishiyama

A power supply protection circuit is a circuit that controls a protection switch provided on a power supply line connecting a direct current power supply and a load circuit. The power supply protection circuit includes: circuitry connected to the protection switch; and a controller that switches an operation state of the circuitry between a first state and a second state. The first state is an operation state in which driving of the protection switch is enabled when the protection switch is a first semiconductor switch having a control terminal connected to a semiconductor layer of a first conductivity type. The second state is an operation state in which driving of the protection switch is enabled when the protection switch is a second semiconductor switch having a control terminal connected to a semiconductor layer of a second conductivity type that is different from the semiconductor layer of a first conductivity type.

Power supply protection circuit

A switching regulator includes a switch device that is connected between an input terminal to which an input DC voltage is applied and an output terminal from which an output DC voltage is output, and that is turned on and off according to a drive signal; a hysteresis generation circuit to which the input DC voltage and the output DC voltage are applied; a reference voltage generation circuit that generates a reference voltage having a gradient proportional to an output current or an output voltage; and a drive signal generation circuit that generates the drive signal by comparing the output DC voltage with the reference voltage, and that, where the hysteresis generation circuit generates the output current or the output voltage that is inversely proportional to a differential voltage between the input DC voltage and the output DC voltage.

Growing community of inventors

Kyoto, Japan

Tetsuya Mihashi