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Thread: can the new GDup power be used with Cree MCE in 2S2P

  1. #1
    Flashaholic* roguesw's Avatar
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    Default can the new GDup power be used with Cree MCE in 2S2P

    Hi guys I want to build a new light and have some spare Cree MCE Leds
    Can I use an MCE in 2S2P configuration and use the new
    GDup high power convertors and powered by a 17670 cell?
    its been a while since I last made a light (4 years) and a bit rusty on the math
    Thanks in advance
    KL-4+Vital Gear FB02
    Pr-t (TWOK) + DB700 + E2E
    Pr (WXOT) + BB700 + E20
    M3T + rcr 123's
    Will build for free!!

  2. #2

    Default Re: can the new GDup power be used with Cree MCE in 2S2P

    Battery voltage must be in the 3-5V range like a single lithium type battery and the LED however configured must look like a single LED with Vf around the 3V range. The GD and GDuP can not drive two LEDs in series unless they are new super ubber LEDs with Vf of 2V each at the maximum drive current.

    Wayne

  3. #3
    Flashaholic* roguesw's Avatar
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    Dec 2002
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    Tokyo, Japan
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    Default Re: can the new GDup power be used with Cree MCE in 2S2P

    Wayne, so the only driver you sell that can drive the MC-E in 2s2p is the badboy?
    I've built a few LuxV lights and have always used the badboys.
    KL-4+Vital Gear FB02
    Pr-t (TWOK) + DB700 + E2E
    Pr (WXOT) + BB700 + E20
    M3T + rcr 123's
    Will build for free!!

  4. #4
    Flashaholic* nein166's Avatar
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    Feb 2006
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    New York
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    Default Re: can the new GDup power be used with Cree MCE in 2S2P

    I've had success using a BB1000 driving a MC-E in 2S2P off a pair of CR123
    Your only going to get 500ma per die unless Wayne can juice up a Badboy to 1400ma

  5. #5

    Default Re: can the new GDup power be used with Cree MCE in 2S2P

    I've used SOB1000s and SOB1227s to run 2S2P MC-Es. But neither will work well if you want to use only 1xLi-ion. You'll need at least 2xLi-ion (barely enough to reach full regulation for the SOB1227), and preferably 3xLi-ion (or the equivalent in terms of Vbatt).

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