exxos's Atari, Amiga & retro forum

terriblefire wrote: 21 Apr 2019 17:20
I just checked the 68060 datasheet. It recommends 2A @ 3.3v... :/

don't forget about CF's - it hangs on the TF360 card, and needs about 0,3 - 0,4A
in other hand, it is connected to the 5V rail... :roll:

Ok, what about these:
https://www.ebay.de/itm/5x-Mini-3A-DC-D ... 4007628573

or a good proven LM style?
http://www.ti.com/lit/ds/symlink/lm2596.pdf

Stephen,
grab this one for testing purposes:
https://www.digikey.de/product-detail/d ... ND/7087190
or
https://www.digikey.de/product-detail/d ... ND/9433342
if You plan to integrate it on board - easy to do!

EDIT
checked pictures of WARP540/560 accelerators - there are several solutions
1. 2x D-Pack's (seems it's for 040 CPUs)
2. onboard LM2596 replacement (switching type)

exxos wrote: 21 Apr 2019 19:46 http://www.ti.com/product/LMZ30606

This one looks very promising.. :geek:

have checked Warp540 power rails and how they solved it, they implemented power supply on PCB
D-Pack is a no go

exxos wrote: 21 Apr 2019 19:46 http://www.ti.com/product/LMZ30606

I like this one... very interesting.

So my take on this might be to evaluate a bunch of different solutions with the current rev0 board and see what happens.

terriblefire wrote: 21 Apr 2019 21:16 So my take on this might be to evaluate a bunch of different solutions with the current rev0 board and see what happens.

Although i'm leaning towards what @exxos posted I thought that the ISL line of chips might be worth a look. They're used in Macbook Air and Macbook Pro's from what i can tell. (not this specific chip though)

https://docs-emea.rs-online.com/webdocs ... 553803.pdf

There's millions of the things from various manufacturers. That particular one you posted needs a external coil. I went with external coil as I wanted to experiment, while it was a squash on my board, the cost per part is also a factor. That one I suggested was one I found on texas, I tend to use their parts in general. I didn't check any other sites.

mouser do a evm so you could just get that to play with...

https://www.mouser.co.uk/ProductDetail/ ... gmclBwhkkL

Yes, indeed You are right..

Well, LM78XX installed now is to weak, that's for sure, this may be a reason for hangs and instabilities.
I recommend to buy an external 5A DC-DC converter and do measurements to see how much current card needs, then add about 1 - 1,5A just to be sure, and then look around what we can get, that's the plan..

EDIT

exxos wrote: 21 Apr 2019 22:18 mouser do a evm so you could just get that to play with...

https://www.mouser.co.uk/ProductDetail/ ... gmclBwhkkL

It's too expensive...

8 Bit Dreams wrote: 21 Apr 2019 22:20 https://www.mouser.co.uk/ProductDetail/ ... gmclBwhkkL
It's too expensive...

Its a demo board....