| Electronics > Projects, Designs, and Technical Stuff |
| Design of SMPS - Not sure what these spikes are being caused by. |
| << < (9/27) > >> |
| Zog:
No probs "brah" :) Thanks for the clue ! Cheers, Phill from W.A. |
| b_force:
--- Quote from: Zog on May 20, 2018, 11:55:59 am ---No probs "brah" :) Thanks for the clue ! Cheers, Phill from W.A. --- End quote --- You can simulate these kind of things pretty easy btw. |
| Zog:
Yes.. I have tried in TI workbench. But no result. Spice is probably better but how many trees must I chop down to see the forest ? |
| T3sl4co1l:
Building a representative model in a simulator does take some knowledge of the simulator itself, and trust in the models (or preferably, verification -- and knowing how to do that). The ringing you are seeing is common mode, there's no reason for that signal to be on that pin as such (it has a capacitor to ground across it!). That's just ringing you will probe literally anywhere in the circuit -- because it's actually voltage drop across the probe's ground lead! Reducing drain rise time will address that. Hence the RCD rate subber I drew. :) Output current: probably lower because primary inductance is lower? A 50% tap gives Lp ~= 25% of total inductance. Maximum peak current remains the same, so you get less energy per cycle = less average power. Ideally what you'd have done: wind the same (or more) number of turns on top. :) Tim |
| Zog:
Yes of course ... 1/4 the inductance not 1/2 I see now. Will get winding. I have a very nice LCR meter with kelvin clips .. so should be able to get a good job done. Which ringing are you talking about ? The one on test point 2 or 3 ? |
| Navigation |
| Message Index |
| Next page |
| Previous page |