If you're using a windows PC, it should be easy enough to just high light the schematic file in the Eagle control panel ( the Eagle program's start screen) and "right click" COPY it to your desktop. Then just zip it up and upload it to this thread as an attachment. If that doesn't work you'll have to find the eagle program files on your hard drive and access the file that way.
Has anyone made an LED driver based on LM3463 6 channel driver IC?
- Thread starter tomservo
- Start date
If you're using a windows PC, it should be easy enough to just high light the schematic file in the Eagle control panel ( the Eagle program's start screen) and "right click" COPY it to your desktop. Then just zip it up and upload it to this thread as an attachment. If that doesn't work you'll have to find the eagle program files on your hard drive and access the file that way.
Hey 61, Cat5 or Cat6 for power would be ideal. Have you done this, or could you elaborate. It would be nice to use 4 of the wires in a cable for + and 4 for -, but I don't know if the board connector or the cable could handle the power to a 5up board? What's your thoughts. Thanks---Rick
Haven't used it, but I should. I have heard good things about using them for leds.
Apparently cat6 run around 22-24 gauge, so 1 amp for leds should be okay. More than that is probably not good. Ideally, you would get something in the range of 20-22 gauge, but I can't recall any wire assortments that use that.
Hey Tom, good to see you back.
O2 is in the final design stages of a 5up board using a A6211 driver for power. He is setting the board up for me with two RJ45's (power and pwm) and a 10 pin molex for the leds, needless to say I'm excited. I'll have you take a look before I send it to Itead.---Rick
O2 is in the final design stages of a 5up board using a A6211 driver for power. He is setting the board up for me with two RJ45's (power and pwm) and a 10 pin molex for the leds, needless to say I'm excited. I'll have you take a look before I send it to Itead.---Rick
:celeb3:
"The Man in the Brown Van" will be delivering my Allegro A6211 PcB's tomorrow! I've got all the other needed parts ready to go. If it all goes as planned, I'll have a 1400ma replacement for the Meanwell LDD-H up and running by tomorrow night!........or.........a big puff of smoke LOL! I can't wait!
"The Man in the Brown Van" will be delivering my Allegro A6211 PcB's tomorrow! I've got all the other needed parts ready to go. If it all goes as planned, I'll have a 1400ma replacement for the Meanwell LDD-H up and running by tomorrow night!........or.........a big puff of smoke LOL! I can't wait!
Speaking of which, my LM3429 boards arrived last night. They're like boost mode LDD drivers.
Although I didn't realize there were other designs of the same driver. The lm3423 and lm3421 have almost the same circuit schematic, but are 2-3% more efficient. It's not too much of a difference, but it nags me.
The LT3476 is a 4 channel led driver that costs $9 for the chip, and it has a pretty simple schematic. Max drive of 1500ma. Boost drivers, but maximum output of 36v. Little late to mention, but if you pursue more stuff like this, I though you might be able to use it.
http://cds.linear.com/docs/en/datasheet/3476fb.pdf
Also, good luck on those boards! Hopefully there won't be overlapping pads or anything.
Although I didn't realize there were other designs of the same driver. The lm3423 and lm3421 have almost the same circuit schematic, but are 2-3% more efficient. It's not too much of a difference, but it nags me.
The LT3476 is a 4 channel led driver that costs $9 for the chip, and it has a pretty simple schematic. Max drive of 1500ma. Boost drivers, but maximum output of 36v. Little late to mention, but if you pursue more stuff like this, I though you might be able to use it.
http://cds.linear.com/docs/en/datasheet/3476fb.pdf
Also, good luck on those boards! Hopefully there won't be overlapping pads or anything.
Hey take a look at this fellows LDD paralleling
http://www.nano-reef.com/topic/330355-ldd-driving-more-then-1000ma/
http://www.nano-reef.com/topic/330355-ldd-driving-more-then-1000ma/
It didn't work. Evil and jedimasterben do a lot of led work, and if they say it can't be done, it probably can't.
I know a couple guys had posted some ideas, but nothing ever was confirmed as working. I just wanted to post the link for feed back. I thought I posted it on the LDD thread also, but I didn't see it. I think RC has some rule regarding other forum sites.---Rick
007-
I received my A6211 PcB's yesterday, and had just enough time to solder one up, before I had to go to work. It looks like I'll have to do some tweaking on some of the component values. I fired one up and got 1600ma on the output. That's obviously a wee bit high for our needs. I'm not going to have time to play with it for a few weeks though, as I'm now stuck working "nights" at an oil refinery LOL.
I received my A6211 PcB's yesterday, and had just enough time to solder one up, before I had to go to work. It looks like I'll have to do some tweaking on some of the component values. I fired one up and got 1600ma on the output. That's obviously a wee bit high for our needs. I'm not going to have time to play with it for a few weeks though, as I'm now stuck working "nights" at an oil refinery LOL.
nemosworld
Active member
1600ma would be awesome for someone wanting to run a parralel string at 800ma.
I'm definitely going to do more testing on these, just as soon as time permits. The only real roadblock that I can see is heat. The Meanwell LDD-H may only be rated for up to 1000ma because of this. Since I was silly enough to package my A6211 chips into the LDD-H footprint, the added heat load on such a tiny PcB may prove to be a limiting factor to attaining substantially higher currents. I may be forced to add a small heat sink to the A6211 chip and employ active cooling to keep operating temps within limits. Unfortunately- I'm working 14 hours a day, 6 days a week right now,until God knows when, so it's going to be some time before I can get back to work creating the "LDD-2000H".:mad2:
nemosworld
Active member
I don't care for those kind of hours. I don't think I could do it.
I don't either, but I don't have a choice. I've got a position that allows me a lot of freedom most of the time, meaning- I can multitask and do the work that I'm paid by my employer to do, and work on my hobbies at the same time. That's a rare professional benefit that I enjoy having, so I'll do what I have to to keep it. I normally work from 6am to 4pm, but for the time being it's 5pm to 7am + a 1 hour commute each way. That's leaving just enough time for a few hours of sleep and nothing else.
Jeez- I forgot to feed the fish......the little buggers are gonna be hungry. Oh well- They're better off. I don't have time right now for water changes either. LOL :headwalls:
The commute time would be the killer for me! I never minded the on the clock time $lol
Interesting your test information so far. I haven't done anything except window shop so far, so no biggie. I'll watch for your updates. Take care, and drive careful on those commutes! :thumbsup:---Rick
Interesting your test information so far. I haven't done anything except window shop so far, so no biggie. I'll watch for your updates. Take care, and drive careful on those commutes! :thumbsup:---Rick
I managed to survive! I ended up working only 78 hours instead of 84 LOL! I spent some time playing around with the A6211 drivers today, and here's what I've got so far-
The one on the far left is being tested to see how much current that it can produce without overheating. The one with the small heat sink is being tested too, for the same reason. I'm using an ambient temp of 95F with no forced air cooling, as a baseline for my testing (just because- that's the temp here right now -lol). I've ordered some small 14x12x4mm copper heat sinks, that should perform better than the steel one that I'm using now. I'll post some more photos and my latest findings, after they arrive and I've tested them a bit. A stable output of 1400ma is the target, so I'll we'll see if I can pull that off- in such a tiny package.
YAY O2!!:dance:...Kind of cool to see it next to a LDD. I'll keep my fingers crossed on the cooling/1400ma. Tom might chime in if he seen your post. I know he's still unpacking. May be some others will post also now that design can be seen. Did you change the Rsense resistor to lower the output?
Soooo excited :bounce2:---Rick
Soooo excited :bounce2:---Rick
No- I haven't changed out the resistor yet. I'm playing with the component values in the Allegro Spread sheet to determine what value combination of resistors and caps will get us to 1400ma. I'm trying to avoid any changes that will cause a change in the preferred inductor of 10mH, since they (the inductors) can be hard to find in the same package w/a different value.
From the spread sheet- it appears that I need an Rsense value of .143 ohms (.13 ohms now) and a 31K ohm resistor for setting the switching frequency at 2MHz. I'll probably order some more parts this week and then continue testing. I'm hoping that the copper heat sinks will provide the cooling that I'm looking for. They only add 50 cents to the cost of each driver, so that won't break the bank. LoL
