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Thread: Multi-level driver for SSC P7 under $8 ?

  1. #31
    Flashaholic* TorchBoy's Avatar
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    Default Re: Multi-level driver for SSC P7 under $8 ?

    Quote Originally Posted by rizky_p View Post
    I had to use 5 Sanyo 2700 to get Full 2.8A(maybe the batteries?) Battery draws = current to LED right? since this is DD. I did not removed the diodes or should i? what is the difference?
    The diodes provide polarity protection, and extend the upper voltage limit by about 0.6V - something you sound like you need. Removing them only makes a difference to the LED operation if your LED Vf is very low, like under 3.3V, which doesn't apply to the P7 with even just one AMC7135, let alone 8 of them. So leaving them on is good.
    No, a torch does not always mean flames.
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  2. #32
    Flashaholic* rizky_p's Avatar
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    Default Re: Multi-level driver for SSC P7 under $8 ?

    Quote Originally Posted by TorchBoy View Post
    The diodes provide polarity protection, and extend the upper voltage limit by about 0.6V - something you sound like you need. Removing them only makes a difference to the LED operation if your LED Vf is very low, like under 3.3V, which doesn't apply to the P7 with even just one AMC7135, let alone 8 of them. So leaving them on is good.
    I am using CSWOJ P7 which means 3.75v@2.8A + 0.6v(diode) = 4.35v

    is it means to stay regulated i need to have voltage above 4.35v?

    Thanks.
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  3. #33
    Flashaholic* TorchBoy's Avatar
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    Default Re: Multi-level driver for SSC P7 under $8 ?

    Quote Originally Posted by rizky_p View Post
    I am using CSWOJ P7 which means 3.75v@2.8A + 0.6v(diode) = 4.35v

    is it means to stay regulated i need to have voltage above 4.35v?
    No, that diode is only on the chip enable (Vdd) pin, which needs at least 2.7V to run, or 3.3V minimum with the diode there. Some of my low Vf Cree XR-Es need it taken off, especially if I'm only using one AMC7135 to drive them, but the Seoul P7 is well above that.

    At the top end, the Vdd pin will accept 7V at absolute maximum (although the AMC7135 will get too hot before that), but the diode means you could in theory have 7.6V.

    On the LED side, the AMC7135 has a minimum 0.12V drop across it when in regulation, which means you need at least 3.75V + 0.12V = 3.87V to stay in regulation.
    No, a torch does not always mean flames.
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  4. #34
    Flashaholic* rizky_p's Avatar
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    Default Re: Multi-level driver for SSC P7 under $8 ?

    Quote Originally Posted by TorchBoy View Post
    No, that diode is only on the chip enable (Vdd) pin, which needs at least 2.7V to run, or 3.3V minimum with the diode there. Some of my low Vf Cree XR-Es need it taken off, especially if I'm only using one AMC7135 to drive them, but the Seoul P7 is well above that.

    At the top end, the Vdd pin will accept 7V at absolute maximum (although the AMC7135 will get too hot before that), but the diode means you could in theory have 7.6V.

    On the LED side, the AMC7135 has a minimum 0.12V drop across it when in regulation, which means you need at least 3.75V + 0.12V = 3.87V to stay in regulation.
    Relly Nice, thanks for the explenation.

    I build my SSC Mag using KD 8x7135 driver(no modes), so i added SKU 6190(7135 5 modes) to the KD's driver. I removes all 3 7135 existing on SKU 6190 driver because i dont want 11x7135 chip driving huge current and possibly destroys the P7. So i just wired up the chip output directly to KDs 8x7135 part that PWM the 7135. And it work 2.5A/0.8A/0.48A(H/M/L) and 5 modes. Now why only 2.5A?? i am using 5 Sanyo 2700. definately hears that typical high pitch noise when on med and low. thanks.
    Last edited by rizky_p; 05-07-2008 at 06:18 AM.
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  5. #35
    Flashaholic* TorchBoy's Avatar
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    Default Re: Multi-level driver for SSC P7 under $8 ?

    Quote Originally Posted by rizky_p View Post
    Now why only 2.5A??:confused
    Split 8 ways, that's 312.5 mA per AMC7135, which is within the working limits of those things (300 to 380 mA).
    No, a torch does not always mean flames.
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  6. #36
    Flashaholic* rizky_p's Avatar
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    Default Re: Multi-level driver for SSC P7 under $8 ?

    Quote Originally Posted by TorchBoy View Post
    Split 8 ways, that's 312.5 mA per AMC7135, which is within the working limits of those things (300 to 380 mA).

    I fully charged the battery, now it pushes 2.8A/1A/edited 0.5(was 5A) to the LED -nice. I am sure even with a slightly discharged 5 AAs 2.8A should an easy job.

    Do you think adding 1 more 7135 will do any good when the battery get weaker?
    Last edited by rizky_p; 05-08-2008 at 03:30 AM.
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  7. #37
    Flashaholic* TorchBoy's Avatar
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    Default Re: Multi-level driver for SSC P7 under $8 ?

    Quote Originally Posted by rizky_p View Post
    I am sure with a slightly discharged 5 AAs 2.8A.
    How discharged was the battery when you were getting 2.5A? What was the battery voltage under load?

    It might also pay to make sure all your connections are really good.
    No, a torch does not always mean flames.
    Ian.
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  8. #38
    Flashaholic* rizky_p's Avatar
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    Default Re: Multi-level driver for SSC P7 under $8 ?

    Quote Originally Posted by TorchBoy View Post
    How discharged was the battery when you were getting 2.5A? What was the battery voltage under load?

    It might also pay to make sure all your connections are really good.
    I am using KD's adapter, it might couse the high resistance in the setup.
    M@g 623->633, M@g 250, M@g 5761, Penta Cree Q2 M@g (Maxflex), 35w HID Spotlight mod,
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  9. #39

    Default Re: Multi-level driver for SSC P7 under $8 ?

    Quote Originally Posted by Norm View Post
    NetKidz any chance of buying 2 X DX SKU.1886 4x AMC7135 board boards from you? I don't really want to buy ten.
    Thanks Norm
    +1 Norm

    Same thing for me... If somebody would have 1 to share, I would be glad to buy it

    JP

  10. #40

    Default Re: Multi-level driver for SSC P7 under $8 ?

    Quote Originally Posted by rizky_p View Post

    Do you think adding 1 more 7135 will do any good when the battery get weaker?
    No I don't think so...
    when Vbat < Vf + 0.6V the driver is out regulation and switches in direct drive mode ; but with a 0.6V drop out added ...

    JP

  11. #41
    Flashaholic* TorchBoy's Avatar
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    Default Re: Multi-level driver for SSC P7 under $8 ?

    Quote Originally Posted by freedom2000 View Post
    when Vbat < Vf + 0.6V the driver is out regulation and switches in direct drive mode ; but with a 0.6V drop out added ...
    For normal Vf LEDs the out-of-regulation condition is Vbat < Vf + 0.12V. For low Vf LEDs there's an extra condition if the AMC7135 Vdd pin is fed through a diode, which is Vf < 3.3V, or the 2.7V needed by the AMC7135 to stay in regulation plus the 0.6V for the diode. The P7 doesn't meet that condition.

    (And remember that the Vf is question is the Vf needed at the current for all the AMC7135s being used at that particular moment, not the LED's Vf at 330-350 mA for a single AMC7135.)

    Are you thinking of switching in an extra AMC7135 when they fall out of regulation or having it there the whole time?
    No, a torch does not always mean flames.
    Ian.
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  12. #42

    Default Re: Multi-level driver for SSC P7 under $8 ?

    Quote Originally Posted by TorchBoy View Post

    Are you thinking of switching in an extra AMC7135 when they fall out of regulation or having it there the whole time?
    Correct me if I am wrong, but switching in an extra AMC when they fall out of regulation will not solve any problem... you will still be in "direct drive" mode... no more juice from the battery !

    BTW I did a mistake the drop out of the AMC7135 is 0.12V and not 0.6V as stated in my previous message...

    JP

  13. #43
    Flashaholic* TorchBoy's Avatar
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    Default Re: Multi-level driver for SSC P7 under $8 ?

    Quote Originally Posted by freedom2000 View Post
    no more juice from the battery !
    It should give slightly more juice, but after they all drop out of regulation it would be like trying to sweep water uphill. You'd be using a slightly bigger broom but you'd still be fighting a losing battle.
    No, a torch does not always mean flames.
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  14. #44

    Default Re: Multi-level driver for SSC P7 under $8 ?

    Quote Originally Posted by Cmd_Bash View Post
    just out of curiousity, do any of you guys know what your doing?

    i'm taking electrical engineering, and thought i might built a high ampere voltage booster from scratch for the p7 to a) test what i've learned b) make a single wafer voltage booster for p7 and beyond and c) have somthing to show come graduation.

    anyways, i've been reading over what eveyone is saying it sounds like most of you are useing a trial and error approch.

    so back to my previous question. do any of you have any knowlege of what your doing? either self taught or institutional, or are learning from trial and error?

    i'm not trying to be rude, just inquisitive.
    I think that would be a great idea and of course you can always run it by your instructor for opinions and possible improvements.
    Why not put a schematic together and let us see what you come up with. There are some pretty good circuits already on the forums if you do some searching.

    Best with your class
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  15. #45
    Flashaholic* rizky_p's Avatar
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    Default Re: Multi-level driver for SSC P7 under $8 ?

    is it possible to build 3 seperate boost driver in 1 board? and run them in paralel to achieve 3A output?
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  16. #46
    Flashaholic* TorchBoy's Avatar
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    Default Re: Multi-level driver for SSC P7 under $8 ?

    Quote Originally Posted by rizky_p View Post
    is it possible to build 3 seperate boost driver in 1 board? and run them in paralel to achieve 3A output?
    I don't see why not. Your board might end up three times the normal size though.
    No, a torch does not always mean flames.
    Ian.
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  17. #47
    Flashaholic* rizky_p's Avatar
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    Default Re: Multi-level driver for SSC P7 under $8 ?

    Quote Originally Posted by TorchBoy View Post
    I don't see why not. Your board might end up three times the normal size though.
    any problem when combining boost driver output?
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  18. #48
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    Default Re: Multi-level driver for SSC P7 under $8 ?

    Quote Originally Posted by rizky_p View Post
    is it possible to build 3 seperate boost driver in 1 board? and run them in paralel to achieve 3A output?
    Yes possible. Except for having it all on one PCB that's pretty much what I did here. That was expensive!
    -Will-

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  19. #49
    Flashaholic* rizky_p's Avatar
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    Default Re: Multi-level driver for SSC P7 under $8 ?

    Quote Originally Posted by darkzero View Post
    Yes possible. Except for having it all on one PCB that's pretty much what I did here. That was expensive!
    that is one expensive solution

    Is it possible to run GD3000 with 2xD NiMh cells?

    thanks.
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  20. #50
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    Default Re: Multi-level driver for SSC P7 under $8 ?




    Hi there, I am a little confused, in the first pic you show, the controller and the driver, but in the second one you show to drivers with 8 AMC7135 total, if I add this 8 to the 3 AMC7135 wich is in the driver we have 11 AMC7135 total, I am correct??? Or I need just 7 AMC7135? 4 wich is in circuit board and 3 in the controller or driver???

    I have everything now to make the mod, I just want to be sure before I started...
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  21. #51

    Default Re: Multi-level driver for SSC P7 under $8 ?

    If I want to use two of these multi mode drivers were do I bypass the mode IC on the second board


    [IMG]file:///C:/DOCUME%7E1/user/LOCALS%7E1/Temp/moz-screenshot.jpg[/IMG][IMG]file:///C:/DOCUME%7E1/user/LOCALS%7E1/Temp/moz-screenshot-1.jpg[/IMG]

  22. #52
    Flashaholic* StefanFS's Avatar
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    Default Re: Multi-level driver for SSC P7 under $8 ?

    Quote Originally Posted by kanarie View Post
    If I want to use two of these multi mode drivers were do I bypass the mode IC on the second board
    Like this, you really need to remove the IC for it to work:
    http://www.candlepowerforums.com/vb/...0&postcount=94

  23. #53

    Default Re: Multi-level driver for SSC P7 under $8 ?

    Nice thread everyone. I will use these drivers in my MAG P7 mod.

    Regards
    Johan Kihlstrand

  24. #54

    Default Re: Multi-level driver for SSC P7 under $8 ?

    By the way. How much voltage do you feed these PCB:s with? Is a single lithium 3.7v battery enough? or will it need more juice to produce 2.4mA?

    Regards
    Johan

  25. #55

    Default Re: Multi-level driver for SSC P7 under $8 ?

    cheap and it works great!!! cheers

  26. #56

    Default Re: Multi-level driver for SSC P7 under $8 ?

    When using this method, how do the modes work?
    Is it 100%/35%.... etc of the total AMC7135 output?
    Or is it 100%/35%.... etc of the output of the controller board + 100% of the 2nd board?

    Also any reason this wouldn't work with Downloads multi led 7135 setup?
    http://www.candlepowerforums.com/vb/...d.php?t=201392

    I'm thinking MCE 2S2P setup, 1400mA output and 2x 18650s for a simple efficient setup.

    Thanks!

  27. #57
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    Default Re: Multi-level driver for SSC P7 under $8 ?

    Quote Originally Posted by Kihlstrand View Post
    By the way. How much voltage do you feed these PCB:s with? Is a single lithium 3.7v battery enough? or will it need more juice to produce 2.4mA?

    Regards
    Johan
    the ones with that particular chip in them, current regulate by clipping and wasting the voltage that goes over what is needed to make it to the current (to drive the led) .
    so say your LED Voltage (Vf) is at 3.7 (at the current) and your battery is at 4.0v these things will just burn up the extra power (so to speak) and keep the voltage right for the ammount of current.

    so say your battery is at 3.5V , your led will be at or below that (due to the slight resistance of the curcuit) which means it will fall out of regulation, and Basically be Direct drive.

    so its all about the voltage of your battery and the voltage your led runs at (when at that current).
    when the battery is Above the LED voltage , it will clip it off to maintain the current , if its below that voltage it will do NOTHING but sit there basically :-)

    So in short, it is Resistance when the battery voltage is too high.

    on MOST white led stuff this will mean when your battery is fully charged the LED will be at its full current, and as soon as the battery goes below about 3.6-3.9 the output will start to dwindle.

    its a good "answer" to direct driving, without breaking something, but it will NOT boost the voltage when the battery goes to low.

    so its all about the VOLTAGE of your LED at that amperage, and the battery voltage at that load.

    because the 1xli-ion or 3xNimhy or 3xalkaline or 3x1.7v lithium is very CLOSE to the voltage of the leds were using, it clips great for those items.

    and it will still clip well for 4x1.5v too, wasting a bit more, but staying in "regulation" longer.

    but NOT for batteries over ~5.5volts (under load), because then it has to waste to much juice resisting, and the part will heat up.

    it was best said once by a member here, its a Glorified resister :-) , it acts as needed ONLY when the voltage is TO HIGH for the LED (at that current level)
    Last edited by VidPro; 12-06-2008 at 05:15 PM.

  28. #58
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    Default Re: Multi-level driver for SSC P7 under $8 ?

    Could this combo of driver boards be made to run at ~1400mA? Remove some IC chips from one board or the other? Thanks.

    JZ

  29. #59

    Default Re: Multi-level driver for SSC P7 under $8 ?

    Quote Originally Posted by JimZinVT View Post
    Could this combo of driver boards be made to run at ~1400mA? Remove some IC chips from one board or the other? Thanks.

    JZ
    Yes.

    But there're already 4x7135 boards and will push about 1.2~1.4A.




    PS. There's also 8x7135 in one 17mm board (double sided). I've asked DX to source it. Let's wait and see.

    Last edited by NetKidz; 12-31-2008 at 05:48 AM.

  30. #60
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    Default Re: Multi-level driver for SSC P7 under $8 ?

    Quote Originally Posted by NetKidz View Post
    Yes.

    But there're already 4x7135 boards and will push about 1.2~1.4A.

    I've been looking for a 4 x AMC7135 board with modes like the 16 mode 3x AMC7135 boards, but haven't found any. Would you be so kind as to tell if that one has similar modes and where you found it?

    Karl

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