The attached file are my schematic and the issue is when I put the loading in the H bridge , there is must H bridge's upper right gate driver burn out , but I can't find out any different between upper right and upper left. although I don't know why always upper right gate driver burn out and the upper left is fine, I think the reason might like the Circuit Note(CN0196) say .So, I think if I put the Zender diode to do the over-voltage protection , this issue might be solved. Am I right? or I need to do another thing to protect it. Please give me any advice.