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okay I finally agreed with simulation
I'm confident with some basic math , so I found output current (seen by cap and resistor) is exactly as inductor current.
what I cannot find is the "flying cap" current, if fany of you got an idea ... helpfull
1657552954
funny.... when flying cap ESR value...
As I said, I'm not very confidend with coupled unductor, that's why I finally change simulation model from coupled inductor (with K spice factor fixed to 1) to a inline Xformer .
And I don't know why, simulation isn't the same now....
I push two package , first one with coupled inductor, the...
well... maybe, by simulation I cannot point out flaws. I'm not very confident with coupled inductor and there "magic"
what I see , is a much lower current ripple seen by the input.
I found this schematic in a project where input filter cannot be build with chemical caps (especially the big one...
in CCM , basic transfert fonction seems same as "standard" buck one's.
my hypothesis is : when in steady state, voltage across capacitance is equal to Vin as it could be if switch is off for a long time.
Hi all
I found out, in my compagny archive, such a topoly
does someone know the common name for it?
after that, I'll google the name and probably be able to found out some equations.
The main advantage I could see , is a lower input current ripple compared to a buck 's one.
inductor are...
btw
to fix this SMPS : change FAN7387 H driver, both MOSFET, remove TRIAC, change 2010 0R5 resistor and the small bipolar transistor (npn T9) next to it, the fuse....
from time to time C9 is damaged : 1nF 500V
regards
Hi all
I'm already on another french board, and I have also fix several Zeppelin's power. If it can helo I give you the like to the thread where I post some schematics "reversed"
The main problem come from the main's voltage detection circuit : It automatically commute a triac to manage...
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