Texas Instruments provides a recommended PCB layout in the datasheet, but it's also important to follow general high-frequency PCB design guidelines, such as using a solid ground plane, minimizing trace lengths, and using bypass capacitors to reduce noise and ringing.
The sense resistor value depends on the current sensing range and the desired accuracy. A smaller sense resistor value provides higher accuracy but increases power loss, while a larger value reduces power loss but decreases accuracy. TI provides a sense resistor selection guide in the datasheet to help with this calculation.
The TPS2394PWR has an operating temperature range of -40°C to 125°C, but the maximum junction temperature (TJ) should not exceed 150°C. It's essential to ensure proper thermal design and heat sinking to prevent overheating.
The TPS2394PWR has a maximum input voltage rating of 60V, but it's not designed for high-voltage applications. If you need to monitor high-voltage rails, consider using a voltage divider or an isolated current sense amplifier.
You can use a low-pass filter, such as an RC filter or an active filter, to remove noise and ripple from the current sense output. The filter design depends on the specific application requirements and the frequency range of interest.
TPS2394PWR datasheet
by Texas Instruments
