N64 Portable+3.3V DC-DC converter diagram

codeman · Post by **codeman** » Sun Jan 22, 2006 6:48 pm

I thought the 3.3v line of the N64 took upwards of 2.5A? Well, here's another suggestion for you:

http://cache.national.com/ds/LM/LM2599.pdf

I've had good experience with the "simple switcher" line from national. Just a few things to point out though. When you choose your external diode, choose a schottky diode, it's closer to the "ideal diode", so your effeciency will be much better. Also the inductor in your picture might not have a current rating high enough for what you're trying to do. That might give you touble when you actual put a load on the thing.

sniper_spike · Post by **sniper_spike** » Sun Jan 22, 2006 6:54 pm

I've realised all those things already, and it's getting close to working, but there's still something wrong with it. I'm not giving up on this chip yet!

codeman · Post by **codeman** » Sun Jan 22, 2006 6:56 pm

is it the blown up one or did you replace that at least?

...good times
good luck!

sniper_spike · Post by **sniper_spike** » Fri Mar 10, 2006 9:30 am

Alright, avoiding fixing my DCDC, I started doing the LED mod to the PSone screen. I noticed some dust had flew under the glass of the diffuser box, so I removed it. But then I forgot which way the glass goes in! Is it rough side down, or smooth side down?

Thanks in advance.

Edit:
Kurt told me on MSN, it's dotted\rough side up. Thanks man!

sniper_spike · Post by **sniper_spike** » Sun Apr 30, 2006 8:26 pm

Eureka! I discovered I was using the wrong value for the current sensing resistor (the incredibly low ohm one). I've order some real resistors (instead of that DIY crap I made before), so once they arrive hopefully I'll be able to get that DC-DC working.