JAJSM08A december 2022 – june 2023 TPS281C30
PRODUCTION DATA
In this application, the TPS281C30A must allow for the maximum DC current with margin but minimize the energy in the switch and the load on the input supply during a fault condition by minimizing the current limit.
The nominal current limit should be set such that the worst case (lowest) current limit will be higher than the maximum load current (4 A). Since the lower limit is 10% below the typical value, for this application, the best ILIM set point is approximately 5.5A. The below equation allows you to calculate the RILIM value that is placed from the ILIMx pins to GND pin of the device. RILIM is calculated in kΩ.
The KCL value in the Specifications section is 50A/kΩ. So the calculated value of RILIM is 9.09 kΩ which can be found as a standard 1% resistor.