So where is that high current going to come from if not the capacitors?We want as little of that as possible to be drawn from the 220uF caps, since they
only have 350mA of ripple current rating.
As such, we will place 1Ohm, 2512 resistors in series with them.
Why is it we see our competitors not bothering to do this?
Thanks, yes i agree, and we will actually thus change to the attached, whereby there is just one lone electro right at the input connector, and it is there , only, to cancel out supply cable inductance ringing with the input. It is upstream of the filter inductor, so will see no ripple current...(not that it would anyway being dirt cheap , inductive electro).Above about 70kHz the electro's are all inductive - so they don't add anything to the HF ripple current capability -
I personally don´t think it´s a good idea to use the "erroneous operation" of a device to build a reliably working circuit.Its a pretty lone, ineffective 47u, dirt cheap electro, but remove it and the whole thing rings like mad.
Because they are building reliable supplies.As such, we will place 1Ohm, 2512 resistors in series with them.
Why is it we see our competitors not bothering to do this?
I just took your informations.Thanks, but its perfectly reliable
Thanks, yes, we would like to derive the ESR and series L of an electrolytic capacitor so that we can discern exactly how much of the ripple current will flow in it. (concerning the schem in the top post, and the fitting of the electro cap just downstream of the input filter inductor)Above about 70kHz the electro's are all inductive - so they don't add anything to the HF ripple current capability -
True.A simple resonance test of the electro's - or using a VNA on the finished pcb will tell you if you have any series or closed LC ckts that are resonant at the sw freq.
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