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降压芯片(外部开关)电流限制问题

Other Parts Discussed in Thread: LM25119

以LM25119为例,产品列表里面写的典型电流最大值为40A。但是25119是两相双输出芯片,有两个电流采样,40A的限制是指每个电流采样是40A限制,还是两个电流采样各20A的限制?

电流采样的限制值,手册里面没有,是能够通过什么参数估计出一个值吗?