OVERHEAT PROTECTION CIRCUIT AND OVERHEAT PROTECTION METHOD

摘要

An overheat protection circuit for protecting a switching element from abnormal overheat is provided, the switching element configured to supply electric power from a power source to a side of a load, including an interruption function part configured to detect a layer short inside the switching element and configured to detect temperature of the switching element. The interruption function part is configured to interrupt the electric power supplied from the power source to the side of the load at an input part of the switching element, when detecting the layer short and detecting that the temperature exceeds a predetermined value, and configured not to interrupt the electric power supplied from the power source to the side of the load at an input part of the switching element, when detecting the layer short and detecting that the temperature does not exceed a predetermined value.

主权项

1. An overheat protection circuit for protecting a switching element from abnormal overheat, the switching element configured to supply electric power from a power source to a side of a load, comprising
an interruption function part configured to detect a layer short inside the switching element and configured to detect temperature of the switching element, wherein the interruption function part is configured to interrupt the electric power supplied from the power source to the side of the load at an input part of the switching element, when detecting the layer short and detecting that the temperature exceeds a predetermined value, and configured not to interrupt the electric power supplied from the power source to the side of the load at an input part of the switching element, when detecting the layer short and detecting that the temperature does not exceed a predetermined value.