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ArcticMyst Security by Avery

FREE DIY open source BOOST driver!!! Tested & working!!

rhd

rhd

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Johnyz:
Totally off topic. To 3D render, do you run the ULP for Eagle3D, and then render in PovRay?

If so, do you have to change the custom dorkbot colours every single time, or is there a way to set them as default?
 





benmwv

benmwv

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Jubathoph, just make sure any signals you put on the enable pin aren't more than 0.3v greater than the input voltage. Input voltage + 0.3v is the max voltage. You definitely couldn't use 5v signals, but 3.3v signals should be fine.
 
Johnyz

Johnyz

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rhd: Not completely off topic I'd say, but oh well... Yes, I run the ULP and render it with PovRAY. I too need to change the colors... Figuring them out was a little challenge too. Buy maybe if you try messing with the Eagle3D config files it might be possible to set it as default.
 
jake642

jake642

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Is this driver capable of getting its ground in through the diode like the Flexdrive?
 
Wolfman29

Wolfman29

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I think he meant to ask if you can use the GND as continuous in this driver like you can with the FlexDrive. In this case, the answer is no, unfortunately. (I think.)
 
rhd

rhd

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Wolfman29 said:
I think he meant to ask if you can use the GND as continuous in this driver like you can with the FlexDrive. In this case, the answer is no, unfortunately. (I think.)
Click to expand...

I don't think that's what he meant. If the diode has an isolated case pin (and I can't think of a diode that you'd be boosting voltage to drive that doesn't) then continous GND doesn't matter.
 
foulmist

foulmist

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Great driver there guys.

I am just wondering what's the input current draw?
Is it below 2A ?

awesome work :beer:
 
Johnyz

Johnyz

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Yep, the ground is NOT continuous with LM3410 designs because of the current feedback.
 
lasersbee

lasersbee

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Tech_Junkie said:
I know this is open source, but please dont let the Chinese get the list of components. Best to keep in house.
Click to expand...

There is no danger of the Chinese copying this Driver....
Except for the addition of Q1 and C3 this same Driver
circuit is on page 19 of the LM3410 Data Sheet.

http://www.ti.com/lit/ds/symlink/lm3410.pdf


This brings up another issue about the disclaimer on the 1st
post....

A little disclaimer: You are free to make and use these drivers
as you please, but you do not have the right to SELL these drivers
without my or Rhd's permission.

Since the circuit that is in the Data Sheet Application was
designed by a TI Electronics Engineer you cannot prevent
anyone from building and selling this Driver Circuit since
Texas Instruments owns that circuit and they allow anyone
to use it.

What you can do is control the use of the exact PCB that
you designed...


Jerry

You can contact us at any time on our Website: J.BAUER Electronics
 
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Hiemal

Hiemal

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Also, why did you make this just a boost converter?

The datasheet has designs for SEPIC topology, which is effectively the same as buck boost. The only differences are stability (SEPIC is better in most respects) and output voltage polarity (I believe buck boost outputs negative voltage from positive voltage, while SEPIC outputs whatever the input voltage is).

If someone made a SEPIC converter with this IC then you could make some decent monies, since it'd effectively be a much cheaper flexdrive. Just putting that out there. :)


Also, why not just test one to see if the ground CAN be continuous? I think it should be, I don't see any reason why it wouldn't.
 
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Wolfman29

Wolfman29

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SEPIC topologies are a lot harder to make efficient... and they require either two inductors or a double-tapped inductor, both of which would make it much more expensive/size-consuming.
 
Hiemal

Hiemal

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If they make an inductor that has two identical windings on it, then it's not a problem. There doesn't need to be any double tapped or double inductors.
 
Wolfman29

Wolfman29

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That's what I was referring to. But then the inductor requires double the saturation current (or some constant times the saturation current - forgot what it was). Point of the matter is that the inductor gets A LOT bigger.
 
Hiemal

Hiemal

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Not that much bigger. I was looking around for inductor design choices for SEPIC converters, and found that most inductors at around 250 kHZ require 2.4 amps max saturation current total. The one that is chosen for the boost converter can handle 3.4 amps without saturation. So, it can't be that much more expensive to get a dual winding inductor at 10 uH, that can handle that much saturation current.
 
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