Tool/software:
Hello,
I have a question concerning the TPS4021x Flyback Quickstart Calculator (SLURB14 Calculation tool | TI.com).
This is a very good and helpful excel-sheet for calculating a Flyback circuit around the TPS40210 Flyback Controller.
However, I am using a slightly different design than the circuit analyzed by the excel file.
In my case, the drain of the transistor of the optocoupler is not connected to GND. Instead, the transistor of the optocoupler is connected in parallel to the resistance R_LED.
This is only a minor difference in the schematic, which makes a big difference for the stability analysis.
It would be ideal if I could edit the logic behind the calculations in the excel file, so that I can still perform the analysis using this excel sheet.
That's why I would like to know if you can provide the original, editable excel file where I can change the formula behind the calculations to make it suitable for my case.
Thanks a lot in advance.
Best regards,
Thomas