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TL1431-EP: Clarity on Zka

Part Number: TL1431-EP

Hi team,

I am looking at the datasheet of the TL1431-EP. I am trying to follow the detailed design procedure and am finding some discrepancies I hope you can clarify.

1. Equation 5 uses the value 1.1mV, but equation 2 has this value as 1.5mV. Which value should be used here? 

2. Equation 6 uses a Zka of 2 Ohm, but everywhere I look in the datasheet has Zka as 0.2 ohm. Which value should be used here? 

Thanks,

Emma