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OPA847: 如何在仅有+3.3V供电的情况下,通过DC-DC电源芯片为OPA847供电

Part Number: OPA847

之前调试跨阻放大器的时候,考虑通过3.3V转5V,再通过电荷泵(TPS60403DBVR)转为-5V。

但是在测试中发现电荷泵输出电压实际为-4.7V,与实际的-5V不符,整个跨组放大器电路无法运行,我是用辅源串接给出-5V后才能正常工作

想请教一下如何使用现有的芯片和模块在单极性电源供入的情况下给OPA847供电