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datasheet上看，当A<0V时，FLT电位可以等于A电位，但又说FLT只能比GND电位低0.3V，那到底FLT电位可以到较低的负压吗？
FLT在这款芯片里面是做 Output Pins，不可以到较低负压。
您在设计过程中更需要看Pin Functions，Recommended Operating Conditions。
