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关于TPS92691芯片IMON引脚电流检测问题

Other Parts Discussed in Thread: TPS92691

我使用TPS92691按照PDF推荐的电路做了一个sepic电路,使用了PWM调光功能,在使用MCU的AD模块采集IMON引脚电压计算LED实际电流的时候发现IMON引脚上是方波波形导致采集不准确,为什么会这样,是因为PDRV引脚控制的PWM功能影响了IMON引脚的诊断功能吗,怎么解决这个问题?