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TPS65100在PAD上的应用

Other Parts Discussed in Thread: TPS65100

请教专家,我在应用TPS65100时遇到这样的问题:按照推荐电路设计,按照需要的电压值进行电阻匹配,通电后,主电压及负电压都是正常的,但正偏置电压输出不对,测试VFB3也和规格书不一致,调整电阻后也有变化,但是达不到理想的值,因为没有正确的参考,也不知道多大电阻合适?烦请专家指点,谢谢。附件为原理图。

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