P9242-R3/RB Datasheet

© 2019 Integrated Device Technology, Inc.

17

May 17, 2019

7.6 Thermal Protection

The P9242-R3 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-R3 if the die temperature exceeds a threshold to prevent damage resulting from

excessive thermal stress. An internal temperature protection block is enabled in the P9242-R3 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.

7.7 External Temperature Sensing – TS Pin

The P9242-R3 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-R3, and it is used for monitoring the voltage level on the TS pin. To disable

the thermistor, the TS pin should be connected to the LDO33 pin through a 10K resistor. Do not leave the TS pin floating.

Figure 16. NTC Thermistor Connection to TS Pin

C26

LDO33

TS

P9242-R3

ADC

R20

RTH1