Other Parts Discussed in Thread: TINA-TI,
Tool/software: TINA-TI or Spice Models
Hello
I am designing a 1000W source with 170V input, and 220V output. I used the excel spreadsheet provided by you for the integrated ucc28950. I have made a circuit, with the values that the calculation sheet shows, but the compensator does not work. The problem is only with the compensator, because if I replace with a single 0.1uF capacitor between the EAM and comp terminals of the ucc28950 (basically an integrator), the circuit works, but it is very slow.
To verify the closed-loop response of the source, I plan to use the average model for ucc28950, but the simulation shows very different values than the graph in the excel file. Is there something wrong with my simulation?
for example, the value of the NS parameter where it comes from? I have set the value (tdelay) of row 100 in the excel file. this is correct?
I have another question and that is when the average model works in DCM mode. I used the simulation that comes by default, and when the load is very small, the frequency response is the same, is not it assumed that the frequency response of the source changes when the load changes?
Thank you very much, and hopefully you can solve some of my doubts.
