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Tinker
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Posted: 18 July 2019 at 7:51pm | IP Logged Copy link to clipboard   Quote Tinker

renewableMark wrote:

The 1.8 and 1.6 is hard to tell till you actually measure it.

But would it make a difference?


There is a difference with how many turns you can fit around the toroid hole.
The bigger wire can carry more current obviously.

I wound all my 4 secondaries with 3 x 1.7 (1.8?) wire. They should be the same on all 4 transformers as they carry the same load current. I would not worry too much if a 1.6 wire had slipped in at one of the parallel windings.

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Posted: 19 July 2019 at 7:48am | IP Logged Copy link to clipboard   Quote Warpspeed

As Klaus says, once you start winding, going up or down a size for the next layer becomes very obvious. Even a small difference becomes cumulative and very noticeable.

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mackoffgrid
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Posted: 21 July 2019 at 8:26am | IP Logged Copy link to clipboard   Quote mackoffgrid

Tony, What was that alternate part for the TLP250 / 3120 driver?
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renewableMark
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Posted: 21 July 2019 at 8:51am | IP Logged Copy link to clipboard   Quote renewableMark

This the one?

data sheet

BTW Andrew jlc took 4 days to make the boards, so not quite in time for dhl to get them to me by the weekend, should be here next week. Looking forward to working out the layout.

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mackoffgrid
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Posted: 21 July 2019 at 10:30am | IP Logged Copy link to clipboard   Quote mackoffgrid

Thanks Mark.

Geez, JLC are getting slow
(I've actually received PCBs on a Sunday - DHL. Was very impressed)

Did you get a different colour than green? They claim they need more time for the other colours.
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renewableMark
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Posted: 21 July 2019 at 10:40am | IP Logged Copy link to clipboard   Quote renewableMark

Nup all just stock std, 1oz and green.

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Posted: 21 July 2019 at 11:49am | IP Logged Copy link to clipboard   Quote Warpspeed

mackoffgrid wrote:
Tony, What was that alternate part for the TLP250 / 3120 driver?

The FOD3182 is more suitable if you plan to run +12v gate driver power supplies. The undervoltage shut down operates within a lower voltage range that is more compatible with a 12v supply.

The TLP250 and HCLP3120 are better with +15v supplies, although may(?) still work with 12v, but its a bit dodgy. Worst state startup voltage can be up to +13.5v with the HCLP.

All are directly pin compatible.

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renewableMark
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Posted: 21 July 2019 at 7:32pm | IP Logged Copy link to clipboard   Quote renewableMark

DHL delivered on Sunday afternoon! F me, pretty good service.

Anyway got the boards, they look good.

So this will be the layout.
Three power boards for No1, 1 full driver and 2 half driver boards.
One power board for No 2 full driver board.
No3&4 both have 2x Warp half driver boards.








So when the driver boards are plugged in properly above the power boards they look like this.




Edited by renewableMark on 21 July 2019 at 7:40pm


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mackoffgrid
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Posted: 21 July 2019 at 8:02pm | IP Logged Copy link to clipboard   Quote mackoffgrid

Yes, it's fantastic. Both DHL and even more so, JLCPCB and the like.

Tony, I thought I'd order some of those drivers even though I'll stick to 15V, just to have them - AliExpress one's of course





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renewableMark
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Posted: 21 July 2019 at 8:54pm | IP Logged Copy link to clipboard   Quote renewableMark

The FOD3182 is good up to 30V so why not use that anyway?

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Posted: 21 July 2019 at 10:36pm | IP Logged Copy link to clipboard   Quote Warpspeed

I have used the HCPL3120 for years, its an ancient chip, sill have about thirty of them in a drawer here.

But I too will get some of those FOD3182 chips, as 15 volts dc seems to be going out of fashion for some strange reason.

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