Hi Expert,
I have a few questions about UCC21710-Q1.
In the isolated analog signal sensing chapter. It's said that "There is an internal 200uA current source internally with 3% accuracy through temperature, which can forward bias the thermal diodes or create a voltage drop on the temperature sensing resistors". While in the example of figure 19, "the duty cycle output has the accuracy of ±3% throughout temperature without calibration. ".
The duty cycle's accuracy is the same with the internal 200uA current source. Is the duty cycle output's ±3% accuracy just caused by the inaccuracy of the internal 200uA current source?
With one time calibration, the accuracy of the duty cycle can be improved to ±1%. Could you tell the method how you do the one time calibration?