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LM5148: L5148输入36V,输出24V 13A。测试的电压,只有6到7V.

Part Number: LM5148

L5148输入36V,输出24V   13A。测试的电压,只有6到7V.  芯片输出的VCC和VDDA测量都为5V.  说明芯片已经使能,但是输出的电压一直不对。怀疑MOS没有打开,请大佬帮我看下电路。