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Pictures looks like a 2 Series? PCB

  • zelda Tuesday, October 22, 2013 5:46 AM Reply
    The 4 large contact places are probably written with:
    Battery+
    Battery-
    Power+
    Power-
    How can I connect 3 batteries?

    The other model with "4 Series" has also the same picture.
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  • desolder Top 10 Forum Poster Tuesday, October 22, 2013 10:46 AM Reply
    I've been wanting these since forever! Finally DX has them!

    You'll need to use the VH, VM, and VL terminals to connect between the cells. VL should be the positive terminal of the first (lowest voltage) battery, VM the positive terminal of the second battery, and VH the positive terminal of the third battery. VH is unconnected in the 3 cell version. I've also seen other vendors sell 3 and 4 cell PCBs which visually look identical, but the only difference is the VH (sometimes called the B3 or confusingly, B1) terminal is unconnected in the 3 cell version.
    What's up with the scrubbed LED driver IC markings?
    What are they trying to hide?

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  • lynn0707 @DX Staff @DX Staff Wednesday, October 23, 2013 9:08 PM Reply
    Hello @zelda,
    Please refer the following picture:

    http://m5.img.dxcdn.com/CDDriver/img/sku_255211_101.jpg
    img src: http://m5.img.dxcdn.com/CDDriver/img/sku_255211_101.jpg


    Hope this will be helpful.

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  • desolder Top 10 Forum Poster Thursday, October 24, 2013 11:45 AM Reply
    Thanks lynn0707! I see in this one it is the VL terminal that is unconnected for the 3 cell version. This is why datasheets/schematics is so important!
    What's up with the scrubbed LED driver IC markings?
    What are they trying to hide?

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  • ebpDoug Thursday, October 24, 2013 12:47 PM Reply
    personally, perplexed at purple pointee part purpose
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  • bluem6 Thursday, October 24, 2013 1:58 PM Reply
    I've just purchase the 4S protection board, so is the VL the first battery or the VH?
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  • desolder Top 10 Forum Poster Friday, October 25, 2013 12:26 AM Reply
    @ebpDoug: Purple pointed part possibly PMOS pullup?

    @bluem6, according to the schematic, VL is unused. The positive terminal of the first cell (the lowest potential cell) connects to VM.
    What's up with the scrubbed LED driver IC markings?
    What are they trying to hide?

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  • bluem6 Friday, October 25, 2013 10:27 AM Reply
    @desolder, I might be missing something here but how do I connect to a 4 cell if one of them is unuse?
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  • desolder Top 10 Forum Poster Friday, October 25, 2013 12:12 PM Reply
    Whoops I misread your post and thought you were asking about how to hook up the 3S version. In the 4S version, VL is connected to the positive terminal of the first cell / negative terminal of the second cell.
    What's up with the scrubbed LED driver IC markings?
    What are they trying to hide?

    Posts(7073) | Reviews | Tip post

  • Ghlargh Tuesday, November 19, 2013 3:59 AM Reply
    This chip is a combined 3S and 4S chip, the 3S and 4S version seems to be the same board. For 3S you would simply ground the VL connection according to the datasheet.
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