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请大家指教mos管的保护电路

Other Parts Discussed in Thread: UCC3895, UCC28950

小弟最近试着做一个开关电源, 频率是100K 电压最高能到320V,  在设计mos管的缓冲吸收电路时,是按照沙老师的那本书来的:

不过,我这个是全桥的电路,电压是320V   这里面的参数是不是需要改一下呢?〉  包括R,C的值和P6KE的型号〉〉 大家能指点一下吗? 多谢!