If the VIN-SENSE=1mV and 46mV,
Could you let me know the current sense accuracy? How to calculate it?
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We have Telemetry Current Sense Accuracy data for LM25066I at 25mV in Datasheet as shown below,
The Accuracy will worsen for 1mV as it will be close to the offset voltage of the Amplifier.
If you want a better accurate part, consider using LM25066IA. The Telemetry Current Sense Accuracy data is available for 25mV, 50mV(CL= GND) and 5mV in datasheet.
Hope this helps.