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LMG3410R070: LMG341xR070

user5013275
Prodigy 105 points
Part Number: LMG3410R070

hello,

I'm confused about the description"LMG341xR070s can be paralleled directly in soft-switching applications. As for hard-switching applications, small decoupling inductors should be utilized to parallel the two half-bridge LMG341xR070s " in the LMG3410R070 datasheet. Can you tell me how to parallel the two half-bridge in hard-switching applications? Where should the decoupling inductor be placed ?

Thanks.

  • 0
    TI__Expert 3225 points

    Hello,

    Due to the consideration of thermal balance, we recommend a small inductor such as 500nH to 1uH depending on your voltage level to be inserted between two switching nodes. This means that you can lay out the two half bridges independently to achieve the smallest parasitics, and then connect them with this inductor. The major reason that we are recommending this inductor is that during the turn on transient, when one FET is possible to be on first, the Coss of two FETs can be dumped into the channel of one FET whichever turns on earlier, and this can result in thermal imbalance. 

    Please let me know if you have any other questions.

    Thanks and regards,

    Lixing