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TPS56528烧芯片问题请教

Other Parts Discussed in Thread: TPS56528

TPS56528烧芯片问题请教: 原理图如下,调试过程中芯片很容易烧掉,使用过程中,突然烧了;或者上电时突然烧了; 输入电压12V,安捷伦的程控电源,负载理论值不超过2A。请问原理图是否有问题?另外,下一硬件版本,前端如何设计一个保护电路呢?能否推荐下?