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TPS51215A: Minimum value that can be set for Rtrip

Conor
Mastermind 8755 points
Part Number: TPS51215A

Hi, 

The TPS51215A can adjust the current limit by the Rtrip constant connected to the TRIPpin. Please let me know if there is a minimum value that can be set for Rtrip. Is Rtrip (min) 2.5kΩ?

・Rtrip(min) = (VTRIP(min)/8)/10uA = (0.2V/8)/10uA = 2.5kΩ

Thanks,

Astro

  • 0
    TI__Mastermind 49610 points

     

    The minimum recommended Trip resistor is 20kΩ which will produce a nominal Vtrip voltage of 0.2V with a 10μA TRIP pin current.  This will program a current limit of 25mV (20-30mV) at the low-side FET.

    The divide by 8 factor is between the voltage at the TRIP pin and the sensed voltage at the MOSFET Source-Drain voltage drop.