SLVUBV4A December 2020 – December 2021 TPS272C45
The TPS272C45EVM has the ability to allow the user to sense the output current of the device through the SNS pin. This ability can be done by either:
In the case that the microcontroller's ADC is sampling the SNS pin, it can required to populate a Zener diode on pin D7 to regulate the maximum voltage going into the microcontroller's analog input. By default a 1-kΩ resistor is used as the SNS resistor (R15), however, depending on the ADC reference used on the microcontroller it can be desired to limit the voltage by use of the Zener diode. The R15 pin's footprint is populated in a 0805 package to allow for easy soldering and desoldering.