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采用TPS92690设计50W的led驱动器,电感设计疑惑

Other Parts Discussed in Thread: TPS92690

一款额定50W输出功率的恒流LED驱动电源,输入时3.3V150AH电池,输入最低电压2.7V, 输出最大电压14V,恒流4.2A,IC采用TPS92690,IC的供电有独立的12V电源供电,用IC资料里的最小电感公式计算出的感量是14.8uH,而用常规的设计,电感纹波电流选用0.5,计算的感量才1uH,如果按照IC资料里要求的最小感量为准,电感纹波才0.03,太小了,不合常规,疑惑?