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您好，This is a legacy device and so unfortunately we don't have too much information available about this part, we typically recommending looking at newer components. The BQ25170 family offers similar simple implementations, though the power mux feature may be needed from a separate IC.
Is the battery heating up significantly during charging? The current used to bias the NTC should be constant regardless of charging.
您好，As mentioned before, unfortunately we don't have too much information available about this part. I would check if the spikes in voltage correspond to any changes in input or output voltage as well as changes in current other than charge current to try to identify the cause.
It appears that it only occurs while the charger approaches the low-temperature voltage threshold, I'm unsure the level of hysteresis that was put in place for this device.
