由于中秋节假期,帖子审批以及工程师回复将会有所延迟,敬请谅解。

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LM22675MRE-5.0不能输出-5V

系统中使用LM22675MRE-5.0输出5V和-5V电源,使用5V输出非可调的LM22675MRE-5.0,5V可正常输出,-5V输出为-2V左右,使用电感特别烫,请帮忙解决此问题,电路设计图如下(附件也添加):

左上角电阻做假负载,防止过轻载太厉害,R217焊的0欧,R218不焊,L6是22uH/350mA,总电流为150mA。现场是输出负电压为-2V,电感L6非常烫。