P9242-R Datasheet

© 2018 Integrated Device Technology, Inc

17

January 16, 2018

7.7 Thermal Protection

The P9242-R integrates thermal shutdown circuitry to prevent damage resulting from excessive thermal stress that may be encountered under

fault conditions. This circuitry will shut down or reset the P9242-R if the die temperature exceeds a threshold to prevent damage resulting from

excessive thermal stress that might be encountered under fault conditions. An internal temperature protection block is enabled in the P9242-R

that monitors the temperature inside the chip. If the die temperature exceeds 140°C, the chip shuts down and resumes when the internal

temperature drops below 120°C.

7.8 External Temperature Sensing – TS

The P9242-R has a temperature sensor input, TS, which can be used to monitor an external temperature by using a thermistor. The built-in

comparator’s reference voltage was chosen to be 0.6V in the P9242-R, and it is used for monitoring the voltage level on the TS pin.

Figure 16. NTC Thermistor Connection to TS Pin

C1

LDO33

TS

P9242-R

ADC

To disable the thermistor, the TS pin should be connected to the LDO33 pin. Do not leave the TS pin floating.