SLVSF02D March 2019 – May 2020 TPS23881
Load current in each PSE channel is sensed as the voltage across a low-end current-sense resistor with a value of 200 mΩ. For more accurate current sensing, kelvin sensing of the low end of the current-sense resistor is provided through pins KSENSA for channels 1 and 2, KSENSB for channels 3 and 4, KSENSC for channels 5 and 6 and KSENSD for channels 7 and 8.
KSENSA is shared between SEN1 and SEN2, KSENSB is shared between SEN3 and SEN4, KSENSC is shared between SEN5 and SEN6, and KSENSD is shared between SEN7 and SEN8. To optimize the accuracy of the measurement, the PCB layout must be done carefully to minimize impact of PCB trace resistance. Refer to as an example.