Re: course of HOWTO build models like (sanken) STR-A6100
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ericsson.sunshine?wrote:
? ?"But the most significant one is that I had been aware of the waveform of FB comparator's ... ? ? The picture in page.15 shown that the Vsc should be a vertical straight line ..."
I think you meant to write *horizontal* line.
? ?"...?but my simulation shows it's rippled ..."
You did say that ANY opinion is appreciated, so here is mine.? This is based on knowing nothing about the device, the datasheet, or the SPICE model.
I'm guessing the waveforms in that plot on page 15 are idealistic, not realistic.
It is an internal voltage inside the IC, right?? Chances are it won't be steady, not a straight flat line.? I don't know what drives it, because the figure in the datasheet shows an empty box going to that node.? Is the voltage on the FB/OLP pin steady?? I guess it must be rippled too.
Your uploaded file doesn't have the "TL431(TI)" (both symbol and model).
Andy
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