FAULT DETECTION PROTECTING CIRCUIT

摘要

In a fault detection protecting circuit, an overheat detection unit is provided for each of communication channels on an IC chip, and detects the temperature in each communication channel as the detected temperature. A chip temperature detection unit detects the temperature at an arbitrary position on the IC chip as a reference temperature. A detection unit sets a predetermined ratio value regarding the difference between an overheat protective temperature and a reference temperature based on the detected temperature in each communication channel and the reference temperature, and identifies that the communication channel is in a state before overheat detection when the detected temperature exceeds a threshold value. A stop-control unit stops the output from one of the communication channels when the detection unit identifies that the communication channel is in a state before overheat detection and when it is identified that the communication channel is in an overcurrent state.

主权项

1. A fault detection protecting circuit configured to protect a communication circuit in which a plurality of communication transceivers are integrated onto one IC chip, and to detect a fault in the communication circuit, the fault detection protecting circuit comprising:
an overheat detection unit that is arranged corresponding to each of a plurality of communication channels in response to the plurality of communication transceivers on the IC chip, and detects a temperature in each of the plurality of communication channels as a detected temperature; a chip temperature detection unit that is arranged at an arbitrary position on the IC chip, and detects a temperature at the arbitrary position on the IC chip as a reference temperature; a detection unit that sets a predetermined ratio value with regard to a difference between an overheat protective temperature and the reference temperature as a threshold value based on the detected temperature in each of the plurality of communication channels detected by the overheat detection unit and the reference temperature detected by the chip temperature detection unit, and specifies the communication channel brought into a state prior to overheat detection when the detected temperature exceeds the threshold value; and a stop-control unit that stops an output from one of the plurality of communication channels when the detection unit specifies the one of the plurality of communication channels brought into a state prior to overheat detection and the one of the plurality of communication channels brought into an overcurrent state.