Regarding the temperature rise at 2.5A I have a related question:
I am designing a flex circuit to sit between fields of neodymium magnets. The circuit will be attracted/repelled by the magnets based on changes in voltage applied to the flex circuit. I have designed the trace layout to take advantage of the flux fields of the magnets. The circuit requires a minimum trace resistance to match the impedance of the operational amplifier. I intend to use CuNi as the trace material to achieve the necessary resistance. At the moment I defined a 2.7 meter trace of 1 mil CuNi 2.7mm wide to achieve the requisite resistance (15 ohms). The flex circuit is a double-sided circular disk 80mm across, in a circular frame but moving axially in the open air. My goal is no more than 45deg temp rise at 150W. How do I determine the temperature rise of the flex circuit based on voltage/current in?
Regards,
--Steve