New Quad TPAD boards @ Cutter- Mtbr.com
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  1. #1
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    New Quad TPAD boards @ Cutter

    Cutter Electronics Your One Stop Led Shop:

    Look like a nice neat solution. Flexible wiring options for 4S, 4P, 2S2P. Might have to re-think the new lights now...

    Would I be able to run 2 - XHP35hi- of these (2S2P) in series, from a HBFlex @ 2a? (24V +24V = 48V) with a 15v battery?

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    Quote Originally Posted by deesta View Post
    Would I be able to run 2 - XHP35hi- of these (2S2P) in series, from a HBFlex @ 2a? (24V +24V = 48V) with a 15v battery?
    Probably not an idea configuration. HBFlex maximum output voltage is 48V, but I think you'll find that XHP35 will draw more than 12V at maximum rated current... based on spec sheet 12.4V at least. So 49.6V will be required so depending on how much margin was built into the HBFlex maximum voltage you could be in trouble.

    Honestly, I have to ask... why do you need that much light on a bike? I'm as much a lumen whore as anyone here, but we're talking well over 100watts. The housing will need to be pretty big and well designed to deal with that much thermal load. The battery will also need to be big and heavy to be able to power that for a reasonable length of time. IMHO, a light built with a single one of these boards is going to be more than you'd ever want unless you ride wearing welding goggles.


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    Probably not an idea configuration. HBFlex maximum output voltage is 48V, but I think you'll find that XHP35 will draw more than 12V at maximum rated current... based on spec sheet 12.4V at least. So 49.6V will be required so depending on how much margin was built into the HBFlex maximum voltage you could be in trouble.
    Ah, hadn't noticed that, kind of puts a blocker on the idea. Though, @ 700mA, it's under 12vF..
    Honestly, I have to ask... why do you need that much light on a bike? I'm as much a lumen whore as anyone here, but we're talking well over 100watts.
    I'm a lumen whore and want to build something to eclipse the 7-up XML I'm running now. I think my problem is that I don't really understand the electronics side as well as I should. I see an LED and try to think how I could use it rather than if it would work..

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    Quote Originally Posted by deesta View Post
    Ah, hadn't noticed that, kind of puts a blocker on the idea. Though, @ 700mA, it's under 12vF..


    I'm a lumen whore and want to build something to eclipse the 7-up XML I'm running now. I think my problem is that I don't really understand the electronics side as well as I should. I see an LED and try to think how I could use it rather than if it would work..
    I you want that much light I'd say you're better off doing building as two lights with separate drivers. The you could use B3flex to drive each light at 3A with a 4S Lithium pack.

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    building as two lights
    That was one of my initial thoughts. I could do 2 housings (one either side of my stem) with a separate housing for the driver with muchos heatsinking which could be mounted under the stem...

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    Quote Originally Posted by deesta View Post
    That was one of my initial thoughts. I could do 2 housings (one either side of my stem) with a separate housing for the driver with muchos heatsinking which could be mounted under the stem...
    I think it is better to have the driver in the housing with the LEDs so that you can use the thermal throttling feature to keep the LEDs from overheating. Also from a redundancy point of view, you don't want to share a single driver between two light heads... if you lose the driver you lose everything.

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    Good points....

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