We are having failures in Europe that we do not have in the US. The FET driven by UCC28063DR are blowing up and even UCC28063DR are being damaged. We at this time are unsure if the IC or the FET are the route cause. I would like to send the IC back to TI for farther analysis. If you have any suggestions on methods of identifying which component is the route cause, I'd willing to try it out. If you need anymore information please contact me at wfadden@cintronmedical.com.