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Thread: CWT Digital PSU @ Computex 2013

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    Default CWT Digital PSU @ Computex 2013

    http://www.youtube.com/watch?v=gLz60WS_sCo

    Managed to get Kip to go check this one out at Computex, especially interesting as you get to see in side.
    It's a little bit Seasonic & a little bit Enermax.

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    That commentary didn't make too much sense to me... My apologies to Kip if it's just me.

    Anyway, what's the deal with the "bridgeless PFC"? Anyone have a clue? It does look like some kind of CCM interleaved PFC, but what, with no chopper MOSFETs..? Or with no bridge rectifier after the PFC?

    I'm confused and intrigued.
    Careful what you wish for... You just might get it.

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    I don't see a classic rectifier.
    Maybe two APFC circuits acting like synchronous rectification of the incoming AC?
    The commentary is clearly a non-PSU person (inductors being called capacitors), but he got us video of it so it's all good in my book.

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    Kip's a great guy, but not a PSU expert. I'm glad he got the footage though, that is interesting. I agree with bobnova, I think what's going on is that the PFC stage is doing synchronous rectification of the input AC, without needing a bridge rectifier.

    Could be wrong though.
    It's my PSU in a box!
    Ooo-ooh,
    My PSU in a box, baby!

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    Quote Originally Posted by McSteel View Post
    That commentary didn't make too much sense to me... My apologies to Kip if it's just me.
    Kip is no electronics expert, not even a novice. He knows how to plug things in correctly as well as proper handling but that's about it.

    A great guy, and he's able to easily travel to Computex and film most of the booths.

    Apparently CWT didn't have anyone on the floor to really talk to the tech about this guy beyond the basic marketing where they'd say it was "Very Clean Power, 80+ Titanium, Fully Modular)

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    Well, anyway, it will be interesting to see how much is there to be gained by omitting diodes and just using an inverting CCM APFC instead. Maybe that's what was needed for 80+ Titanium? But boy, does that DSP has it's work cut out for it... Though the inverting PFC should fit nicely with phase-shifted ZVS.

    I wonder how the whole thing will handle sudden intense transients.

    Oh, and I meant no disrespect and never meant to be too hard on Kip, it was just an observation.
    Careful what you wish for... You just might get it.

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    <3 Kip, sweet guy
    "Sometimes a cigar is just a cigar" - Unknown (but sometimes attributed to Sigmund Freud)

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    Supposedly this is going to be CWT's next "PUC" type design where they'll use it to scale 1000w to 1600w, with that MAXIS design taking up the 500-1200w area for them.

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    Great information.

    A MOSFETs based PFC rectification, or something like, must be necessary to take a step over the platinum efficiency.

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    I like his watch.

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