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LM5018,输出24V问题

user5922631
Prodigy 50 points
Other Parts Discussed in Thread: LM5018

用LM5018文档中参考电路输出10V没有问题。我需要输入最大90V，输出24V，将R1改为10K，R6改为549R，上电之后发现VCC脚对地短路，请问哪里有问题？