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Recent content by iso14000

  1. I

    coupled buck topology

    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...
  2. I

    coupled buck topology

    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...
  3. I

    coupled buck topology

    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...
  4. I

    coupled buck topology

    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.
  5. I

    coupled buck topology

    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...
  6. dig_for_topo

    dig_for_topo

  7. I

    Blown power supply for home Music Streaming device (Zeppelin Air) - Pictures inside

    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
  8. I

    Blown power supply for home Music Streaming device (Zeppelin Air) - Pictures inside

    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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