Hacking a BFL Single/25 to 48gh and beyond.....

[lightfoot]

Not sure I understand what you're asking? When you factor in shipping and such though it might be cheaper to do it locally.

C

[qosmio]

here closeups of the FET which can blow so easy:







now I have to source them, bfl wants the whole box sent to them, not just the board, what a waste of energy.
I see 2 typ of FET :
CSD16404 TI 38E MF3X 3E http://www.rom.by/files/CSD16404.pdf
and
010NE2LI HSA335 http://www.infineon.com/dgdl/BSC010NE2LSI_rev2.2.pdf?folderId=db3a304313b8b5a60113cee8763b02d7&fileId=db3a30433072cd8f01308d8d1cdf33de

and here is FET of 5gh single bfl: left side is 7030L FET maybe same as CSD16404

[helipotte]

Q3 in that center photo looks a bit cooked.  Hope the board/pad under it is not damaged!

Thanks for the datasheet links.

[qosmio]

Yes Q3 is damaged and need replacement any idea where i can buy this FET?

CSD16404 = 7030L

[bcp19]

Yes Q3 is damaged and need replacement any idea where i can buy this FET?

CSD16404 = 7030L

My unit has IOR mosfets on it instead of the 010NE2LI ones, unfortunately I am out of town for the weekend, so cannot get you the info on them at the moment.

[helipotte]

Yes Q3 is damaged and need replacement any idea where i can buy this FET?

CSD16404 = 7030L

What country are you in?  Have you tried Mouser?

http://www.mouser.com/ProductDetail/Texas-Instruments/CSD16404Q5A/?qs=%2fha2pyFadugSnQ10j0BuekvPf4xb1xPwdHGhkVkF47c%3d

[qosmio]

thank you I ordered 10 for 16 usd including fedex shipping

[lightfoot]

So anyway a quick update: I installed 7 more chips on my other single/30 a few weeks ago, ran well at 56gh overall. However last weekend I powered it down and it came up with only one side.

Turns out the 1850 chip wasn't working right, so I pulled it and replaced it. Now one set of FETs is working, but the other is not. Enough to keep the board hashing with a fan pointed at the running FETs but still kind of odd.

And I have another single board that has one side down. At first I thought the problem was the 1850 and swapped it, but sure enough 0 volts. Then I found the FETs were shorted and replaced half of them. Then I checked the caps and found one of them (the one between vcc and ground) was shorted, which was shutting down the chip. Pulled the cap and the board is coming up but only at .6 volts, which is kind of odd.

Just got a new set of FETs in, will replace this weekend and see what happens. It would be nice to get the other 30gh running on this board.

Never dull, always fun.