SLVSDT3D January 2018 – December 2019 TPS25221
PRODUCTION DATA.
Some applications require that current limiting must occur below a certain threshold. For this example, assume that the desired upper current-limit threshold must be below 500 mA to protect an up-stream power supply. Use the IOS equations and Figure 24 to select RILIM.
Select the closest 1% resistor greater than the calculated value: RILIM = 124 kΩ. This sets the maximum current-limit threshold at 500 mA . Use the IOS equations, Figure 24, and the previously calculated value for RILIM to calculate the minimum resulting current-limit threshold.
The resulting minimum current-limit threshold is 391 mA with a 124 kΩ resistor.