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TPS65251 CH1 发生烧毁, 与无法输出正常问题

Other Parts Discussed in Thread: TPS65251

Dear TI Sir

有一项目单用 2 颗 TPS65251 , 项目进入量产, 在 End User 端返回不良, 约有 0.3% 不良,  在这些不良分析有 8 成都是 同一个 Vout (1.8V) 不良

其中一片烧毁, 请问有什么原因或设计不良会造成  TPS65251 CH1 不良