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运放的供电经常用双电源，便携式应用，只用锂电池或者纽扣电池供电，如何通过单电源得到双电源，给运放供电呢？TI有输入正电源输出双电源的芯片吗
你输出电压和负载分别是多少？你可以参考TPS65130或者TPS65132等。
