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Old 10-08-2010, 06:30 PM #49
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Default Re: Planning DIY TPS63000 based driver

Quote:
Originally Posted by jib77 View Post
If I sell anything it will be the PCB. If ...
1) I can resolve the heat and stability issues at higher currents
2) you are willing to so some fairly advanced soldering

Yes you mentioned this before
I am willing to do soldering but the advanced soldering might be a problem Assuming you work out the problems and the driver becomes a good and popular substitute for the popular Dr.Lava's units, what prevents you to make them in bulk cheap and selling for the price of flexmods (or slightly more)?

P.S. I apologize if my question sounds dumb and I'm missing something obvious.

P.S.S Dr.Lava now has the drivers built for him right?


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650nm : LPC-815 @ 0.45A in Ehgemus Host Easy Build: 293mW

List of 12x 405nm 5.6mm diode builds

Last edited by gillza; 10-08-2010 at 06:33 PM.
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Old 10-09-2010, 03:19 AM #50
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Default Re: Planning DIY TPS63000 based driver

Well see how it goes, if there is enough demand I might consider alternatives to a DIY solution. I just saw on sparkfun a tutorial for reflow soldering using a non-stick hotplate. This might be a good solution.



SparkFun link

It will take a significant order (and cash outlay) to make it cost effective for you guys and me. I just do not have the cash or the time right now to devote to such endeavor. There is also the time its going to take to conduct QC testing, shipping, and dealing with the inevitable dumb-ass that will fry the darn thing b/c they couldn't follow or understand directions.
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Old 10-15-2010, 02:42 PM #51
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Default Re: Planning DIY TPS63000 based driver

How is that going? Need any help?
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Old 10-15-2010, 07:17 PM #52
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Default Re: Planning DIY TPS63000 based driver

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Originally Posted by Rafa View Post
How is that going? Need any help?
Just waiting for V3 boards to come in ... they were mailed yesterday. I should have them early next week

I did put 0Ω resistor across the input diode pads and got one stable at 667mA but the other is not ... I looks like its going in and out of thermal shutdown. I didn't even want to try anything higher until I get the new boards.
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Old 10-15-2010, 07:38 PM #53
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Default Re: Planning DIY TPS63000 based driver

Looking forward to more info
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Old 10-16-2010, 03:58 PM #54
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Default Re: Planning DIY TPS63000 based driver

Quote:
Originally Posted by jib77 View Post
Just waiting for V3 boards to come in ... they were mailed yesterday. I should have them early next week

I did put 0Ω resistor across the input diode pads and got one stable at 667mA but the other is not ... I looks like its going in and out of thermal shutdown. I didn't even want to try anything higher until I get the new boards.
You may want to place a "micro" HS in the IC.
Like the ones in the graphic card's ram, you know.
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Old 10-19-2010, 01:36 AM #55
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Default Re: Planning DIY TPS63000 based driver

They're Here!



If I have time Ill stuff one tomorrow.
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Old 10-19-2010, 05:20 PM #56
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Default Re: Planning DIY TPS63000 based driver

They look oh so pretty
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Old 10-20-2010, 02:52 AM #57
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Default Re: Planning DIY TPS63000 based driver

It works! Measured 750mA w/ dummy load and it was still cool to touch!

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Old 10-20-2010, 02:54 AM #58
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Default Re: Planning DIY TPS63000 based driver

Quote:
Originally Posted by jib77 View Post
It works! Measured 750mA w/ dummy load and it was still cool to touch!
What is the max current it can supply?
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Old 10-20-2010, 03:13 AM #59
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Default Re: Planning DIY TPS63000 based driver

Quote:
Originally Posted by gillza View Post
What is the max current it can supply?
The datasheet says 800mA in boost mode and 1.2A in buck mode ... it may do more with heat-sinking since the rating on the internal switches is 1.8A. Right now I don't have the resistor values needed to test any higher.
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Old 10-20-2010, 03:40 AM #60
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Default Re: Planning DIY TPS63000 based driver

Looking good!
boscoj has some heat sinks that would look nice on that.
Sunon 20mm 5V fans, small heatsinks and 7mm peltiers
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Old 10-20-2010, 04:19 AM #61
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Default Re: Planning DIY TPS63000 based driver

Quote:
Originally Posted by jib77 View Post
It works! Measured 750mA w/ dummy load and it was still cool to touch!
Congrats on getting it to work!

What was the voltage drop through the load, and for how long could you run it and still stay cool at 750mA?
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Old 10-20-2010, 04:50 AM #62
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Default Re: Planning DIY TPS63000 based driver

Quote:
Originally Posted by comradmax View Post
Congrats on getting it to work!

What was the voltage drop through the load, and for how long could you run it and still stay cool at 750mA?
Thanks, the Vdrop was 2.8V IIRC. It ran for around two minutes while I was trying to find my IR thermometer ... didnt find it, but it was still cool to touch when I got back.

Also, FYI ... it fit inside an Aixiz module, but its about 1mm too long with the wires attached.
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Old 10-20-2010, 07:33 AM #63
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Default Re: Planning DIY TPS63000 based driver

Cut the back of the module off. Many do that.
Great to see you got the power up and kept the working temp so cool.

+1
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Old 10-20-2010, 02:54 PM #64
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Default Re: Planning DIY TPS63000 based driver

Update ... It does fit Aixiz w/ input wires. With the correct end in(last night I inserted the LD end in ... ooops), the wires are far apart enough that they accommodate themselves with a slight push.
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50mW O-Like New Pocket Greenie OLCGL50

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レイセーたちはすごいですよ。
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