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TPS61196PWPRQ1输出电流偏大



背光输出电流设计值360mA,实测372mA,输出电流偏大12mA,背光输出电压设计值18.6V,实测电压为20.1V,如附图1波形,电压偏大且电压有波动。附图2,更换电感器件为NS10145T330MNA,SW波形有变化,输出电流有变化,但仍偏大8mA,输出电压是19.8V。两个电感差异如附图3,正常的SW波形应该是什么样的?两种电感对应的SW为什么有这么大差异?layout如附图4,是按照IC spec要求走线的啊~