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TPS61165输入电压超过10V,IC不工作

Other Parts Discussed in Thread: TPS61165

由于前一版主板管脚不兼容,所以所有管脚都进行飞线处理;

当Vin=5V时,Vfb=35mV,Vsw=23.4V;当Vin=8V时,Vfb=68mV,Vsw=23.4V;

当Vin=10.5V时,Vfb=0.2mV,且屏都点不亮;

有几个问题,Vfb怎么不是标准的200mV;当Vfb变大时,为什么Vsw没有变大;输入电压规格书上为3.3V-18V,我飞线接10.5V,IC就不工作了。

麻烦各位解释一下。