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TPS23754电源上电掉电,同步整流moS管,电压过冲很高

Other Parts Discussed in Thread: TPS23754EVM-383

                   同步整流MOS是100V ,储能电感是47UH,电感后面滤波电容我用了红宝石的ZLH系列(高频低阻) 330uF的,做上电,掉电拔插实验,容易损坏同步整流MOS,后来拿示波器查看,过冲电压可达到差不多150V,之后,我把这滤波电容换其他品牌的,220uF/16V的,没发现任何过冲,但这个电容我不知道其他具体参数。这我就想不明白了。希望有大侠能解释下。。。还是其他哪没调试好。。。