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TPS62110-HT输出电压不对

Other Parts Discussed in Thread: TPS62110-HT, TPS76901-HT, TPS62110

使用TPS62110-HT芯片中发现以下问题:理论情况输出电压应该是3.3V,按datasheet所示,FB输出电压应该固定是1.153V,但是测试发现FB输出电压为1.474V,导致输出电压为4.2V,到底是电路设计问题还是什么问题?