Dear Sir,
in an application some samples of microcontroller P/N TMS570LC4357ZWT fail due to a wrong sensing of the internal temperature. In particular, in the faulty microcontrollers the sensor measures a temperature about 15 °C higher than the temperature measured by the operating devices. For example, 1 or 2 seconds after power on of boards with temperature of 20°C the internal temperature of the faulty microcontrollers is 35°C - 40:C, while the temperature of the operating microcontrollers is about 24°C. Take into account that the test was performed on boards powered off for several hours.
The S/N of some of the devices that show this issue are listed below:
- YFB-83CD4PW
- YFB-IBARR7W
- YFB-29AVKSW
Could you help us to fix this issue?
Thanks
Best regards
Marco Pizzato