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LMR60410-Q1: DCR value of inductor

Part Number: LMR60410-Q1


Tool/software:

Dear team,

Do we have maximum DCR value for the inductor when using LMR60410-Q1?

We used webench and it recommends 36mohm DCR for L1 at first. But if we select smaller package size inductor, it will be around 100mohm to 200mohm. In my understanding, voltage mode DCDC has lower limit DCR in order to make sure the enough voltage ripple. But LM60410 is current mode control and I am not sure how can we consider it.

Thank you.
Yuto

  • Hello Yuto, 

    There is no need to consider the DCR for LM60410's controls scheme.  In this case the inductor's DCR is primarily a parasitic element that affects efficiency and thermal performance, not the fundamental operation of the control scheme. 

    Regards, 

    Oscar Ambriz