Hello,
is it possible to access the altium files related to the TPS51220EVM? I would like to see in more detail the connections made in the PCB of PGND and SGND shown in the datasheet.
Best regards,
David
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Hello,
is it possible to access the altium files related to the TPS51220EVM? I would like to see in more detail the connections made in the PCB of PGND and SGND shown in the datasheet.
Best regards,
David
Hi David,
All analog GND are connected together, then it's connected with other layers PGND by vias. on top layer, analog GND is not connected with PGND.
Are you clear?
Best regards,
Edwin.
Dear Edwin,
thanks again for your answer.
Could you please tell me a correct stackup for this converter?
I am thinking about the following for a 4 layer PCB:
Top solder 0.5 mil 3.3 constant
Top Layer Copper 1.4mil (Signals and Power)
Dielectric Prereg 9mil FR4 4.3 constant
Mid1 Layer Copper 1.4mil (GND)
Dielectric Core 39mil FR4 4.3 Constant
Mid2 Layer Copper 1.4mil (POWER)
Dielectric Prereg 9 milFR4 4.3 Constant
Bottom Layer Copper 1.4mil (Signals)
Bottom Solder 0.5mil 3.3 Constant
Approx. Thickness 1.6 mm or 64mil
The idea is to have a converter providing 6-8 Amps in each channel (4V and 3 V respectively).
Is this stackup suitable?
Thanks again,
kind regards,
David Cavalheiro
Hi David,
It's better to put 2OZ(2.8 mil) copper for top layer copper and bottom layer copper. you can decrease Dielectric Prereg to 7.6 mil. so total thickness is still 1.6mm.
Best regards,
Edwin.