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LMR23630: Transconductance

TI-CSC
Genius 14410 points
Part Number: LMR23630


Tool/software:

Hello E2E Experts,

Good day.

What are the transconductance, gCS and gM for LMR23630?

Regards,

TI-CSC

  • 0
    TI__Mastermind 35210 points

    Hi,

    Comp to inductor current loop gain is Comp*Gm2=iL.

    Considering the typical model as shown below.

    Gm2 is derived for Rsense=1, scale gm2 appropriately if you use a different Rsense value (I.E. multiply by 10 for Rsense=10m)

    Gm2 is ~ 5.1. for Rsense =1. Ignore that showed in the image...that was for a different product.

  • 0 in reply to Marshall_Beck
    TI__Genius 14410 points

    Hello Marshall,

    Good day.

    My product, LMR23630 has an internal sense resistance and I do not know what it is, so I cannot determine A or Gm2.

    Regards,

    TICSC

  • 0 in reply to TI-CSC
    TI__Mastermind 35210 points

    Correct, I am translating our implementation (LMR23630), to the conventional modeling of a PCM buck converter.

    It would not be a straightforward conversation if I were to relay the exact implementation of LMR23630, so I am relaying our implementation such in a way it is easier to understand.