Can VREF_SAMP connect the divided resistors? I saw the pin definition said connected to 0.01uF.
But the sector 7.3.1 gives a formula about VREF_SAMP. Should it be VOC_SAMP's formula?
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The voltage divider should be placed at VOC_SAMP biased by VIN_DC, here the reference voltage is sampled. The voltage used for reference is VREF_SAMP, which is why it is used in the formula. This voltage is stored at the VREF_SAMP pin across the connected capacitor.