Patent ID: 9680296
Date: 2017-06-13
CPC Classifications: B60R,H02H,H04B

Claim:
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 plurality of temperatures correspondingly in the plurality of communication channels as a plurality of detected temperatures; 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 plurality of detected temperatures correspondingly in the plurality of communication channels detected by the overheat detection unit and the reference temperature detected by the chip temperature detection unit, and specifies at least one of the plurality of communication channels brought into a state prior to overheat detection when at least one of the plurality of detected temperatures correspondingly in the at least one of the plurality of communication channels exceeds the threshold value; and a stop-control unit that stops an output from the at least one of the plurality of communication channels when the detection unit specifies the at least one of the plurality of communication channels brought into a state prior to overheat detection and the at least one of the plurality of communication channels brought into an overcurrent state.