2oz to 1oz Cu reduction, what to worry about?

[ANTALIFE]

Hi All

I have been asked to see if I can reduce the copper thickness on a bunch of boards from 2oz to 1oz. Most of these boards are LED drivers while others have a few impedance controlled tracks

So my question is, what sort of things should I be worried about when reducing the Cu thickness? So far my checklist is:

• Check heat-sinking capability is adequate
• Check trace width is adequate for specified current
• Check track impedance is within tolerance

[Siwastaja]

Thermal simulation is difficult, by far it's easiest to just order prototypes, test in worst-case ambient temperature and monitor board and component temperatures.