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TPS5461X系列,我买了TPS54612,54615,54616,刚买回来,这东西可贵了,但是最后只有tps54612好用,输出1.2V,那两片都是输出0.28V,不知道怎么回事

Other Parts Discussed in Thread: TPS54612

TPS5461X系列,我买了TPS54612,54615,54616,刚买回来,这东西可贵了,但是最后只有tps54612好用,输出1.2V,那两片都是输出0.28V,不知道怎么回事,我的原理图和PCB板已上传,谢谢帮我解答