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KA , 01-18-2025, 03:04 AM

Hello,

I am currently performing a PDN analysis on Altium and the current density scale shows a maximum of 42.2 A/mm², while most areas remain under 1 A/mm². Attached is a screenshot of the third inner layer, which uses 0.5 oz copper for a +5V copper pour layer. The 5V input is supplied via the J100 connector at the bottom, powers several 3.3V voltage regulators on the board, and exits through the J700 connector at the top to another board. This board will be housed in a ventless aluminum case. The current density seems to be higher closer to the connectors. I'm particularly concerned about the safe current density thresholds for 1 oz and 0.5 oz copper layers to ensure reliable operation.

Could you advise on how to better interpret these PDN analysis results? I want to ensure the design is safe before proceeding with fabrication.

Thank you for your help.

KA , 01-18-2025, 03:04 AM

Interpreting PDN Analysis

QDrives , 01-18-2025, 05:19 PM

I would first look at the voltage drop.

KA , 01-19-2025, 01:50 AM

Ok. There is no significant voltage drop. The minimum voltage on the layer is 4.9v.