按照TI管网的设计方案和参数做了个样板，输入14-28V,输出12V/3A，实际短路测试时如下：IC输入电压14.5V,输出12V1A时短路输出12V,大约在1分钟内，续流二极管（SS34）冒烟直至烧坏。
请问TI人员，TPS54331规格书里不是说有短路保护的吗？为什么还会出现这种情况？请解答！附件为电路图。
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