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Hi
layout上功率回路是否足够小,输入电容是否尽量靠近电感输入端(走线款一点,同时兼顾芯片VIN脚) 这些都是影响最大输出电流的。
即便是2层板,不至于完全不能带载,将你的layout贴图上来看一下。
Hi
将功率PGND焊接一根飞线到输入电容GND处,看一下带载的效果是否会变好?