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BQ24620EVM: AGND and PGND Connection

Alex K16
Intellectual 290 points
Part Number: BQ24620EVM
Other Parts Discussed in Thread: BQ24620

Hi,

I am trying to analyze the BQ24620EVM layout to help me in my own BQ24620-based PCB design.

The BQ24620 specs call for a single point connection between the AGND and the PGND planes.

Would the point indicated on the attached picture be considered as such a point for the EVM board or am I missing another connection somewhere on the board between the AGND and the PGND.

Thanks,

Alex

  • 0
    TI__Mastermind 24075 points

    Hi Alex,

    Yes the PGND pin if the IC connects through that point to AGND, and there are vias from that connection to the mid layer containing AGND.

  • 0 in reply to Kedar Manishankar
    Intellectual 290 points

    Hi Kedar,

    I am sorry I was not clear enough describing the attached picture.

    The image is actually showing your EVM board layout from the SLUC339 package, so I was hoping for the 100% sure answer if this was the only connection or not.

    Thanks,

    Alex

  • 0 in reply to Alex K16
    TI__Mastermind 24075 points

    Hi Alex,

        Yes, the comments above are referencing the layout connections for the EVM. The trace form the AGND connects to vias down into the midlayer which is being used as AGND, and AGND is connected to PGND through that highlighted connection in your picture at that single point. In our newer layouts we use net-ties to be able to connect AGND and PGND together close to the IC, so that is another option