Electronic – Minimum PCB Trace width with SMD components and Autorouter problem

pcb-designpcb-layerstrace

I would like to receive some suggestions from you about the trace width for my PCB.
I'm using some SMD components (ATmega328p TQFP32 and FT232), the main power is 5VDC at maximum 2A. I use also a ESP Wi-Fi module, but the maximum current comsumption will be lower than 2A for sure.

My PCB manufacturer says that the minimum trace width should be 16 mils with copper thickness 105um.

I used an online calculator and it recommends to use a width of 7 mil for the external traces on the PCB (my PCB will use only two layers).

So, it is OK to set 16 mils for the traces?

Thank you and sorry if the question looks too much stupid.

enter image description here

This is the result of the Eagle autorouter and as it is possible to see the problem is with the SMD components. I think it's because the traces are still too wide for the SMD components pins.

enter image description here

Best Answer

The 7 mil reccomendation is a minimum to avoid excess heating from a 2 A current. A wider trace is no problem.

The challenge will be making footprints for your fairly fine-pitch SMD parts that can be manufactured with your heavy copper requirement.