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tps61087 空载反馈电压太小了

Other Parts Discussed in Thread: TPS61087

     tps61087 空载反馈电压0.3v,输出明显不对了,电路图按照数据表里的,电感3.3uh,R1和R2分别为18K,200K,不知道哪出问题了,谁有做过这款产品的请帮忙回答一下,谢谢。