Resistance changing device for providing overcurrent protection

摘要

An overcurrent protection device may include: an input terminal to receive an input current; an output terminal coupled to the input terminal; and a current limiter circuit integrated in the silicon substrate and disposed between the input terminal and the output terminal. The current limiter circuit may include: a series pass member having a pass state characterized by a first electrical resistance and a clipping state characterized by a second electrical resistance higher than the first electrical resistance, wherein the series pass member is one A series current sensing integrated in the silicon substrate and is configured to receive the input current and output a measurement voltage based on the received input current, wherein the series pass member is configured to set the current limiter circuit in the limit state, when the measurement voltage indicates that the input current exceeds a predetermined level.