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TMS320F28P550SG: VIA for RSH package

Wayne Huang
Genius 17175 points

Part Number: TMS320F28P550SG

Tool/software:

Hi champs

I am asking this for our customer. 
The user is using F28P550SG9RSHR and have questions for VIAs. 

1. What are these VIA used for?

For both VSS and heat dissipation?

2. Is it acceptable to not use any VIA?

3. if VIA is required, is it acceptable to use VIAs with going through only to the 2nd layer underneath F28P550SG9RSHR?

that is, the VIAs are not going through all layers of PCB. 

  • 0
    TI__Mastermind 24001 points

    Hi Wayne

    In the example design, the vias are mainly for thermal relief. It also allows easier connecting to the ground plane for all components and VSS pins.

    It is only recommended, not required. It is possible to design a board without the vias although not optimal

    If you use vias, then the connection should be to the closest ground layer in the board layer stackup. Though these types of vias that don't go directly through the board are typically more costly

    Regards,

    Peter