JAJSKQ0A December 2020 – December 2022 TPS548B28
PRODUCTION DATA
The RTRIP resistor sets the valley current limit. Equation 14 calculates the recommended current limit target as 18.18 A. The value was rounded up to 20 A. Use Equation 15 to calculate the RTRIP resistor to set the current limit. The typical valley current limit target is 20 A and the closest standard value for RTRIP is 6.04 kΩ.
With the current limit set, Equation 16 calculates the typical maximum output current at current limit. Equation 17 calculates the typical peak current at current limit. As mentioned in Section 8.2.2.3, the saturation behavior of the inductor at the peak current during current limit must be considered. For worst case calculations, the tolerance of the inductance and the current limit must be included.