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Question about formula for getting a sense register & inductor DCR of LTC2977


My customer asks some questions about getting a sense register & inductor DCR of LTC2977.

They will monitor a current of DC-DC Power  and use Inductor DCR Current Sensing Circuit. 

Please refer Page 83 of LTC2977.

Q1) Would you let me know the meaning of  "2≠" in second formula for getting CCM2 ?

      They say that they can't understand the exact  meaning of "2≠" in formula for getting CCM2.

Q2) If you have, would you explain the methods to get values of CCM1 CCM1 CCM1 & CCM2  easier?

       Please help them.



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