250W DC-DC PSU for non-mini mobo's

sweetrobot2k · 11-06-2003, 04:48 PM

If you need a dc-dc psu for your mobile setup, Keypower is an alternative solution to the very complete Opus, but has about 100w more for those of you with that need. They have both AtX and AT, and include the p4 conector for new mobo's. The price is $197 (plus $5-8 shipping in US) for the ATX, (unsure about the AT), so it's on par with Opus' money-wise. In order to have all the auto power-up/down capabilites, you'll need to throw in a shutdown controller, such as that offered by Jeff Mucha, for $30 in US, $40 International.

The purpose here is informative- letting people know a solution I'm considering.
In all, this setup will cost about $235, not bad imo.

-Keypowe DC-DC offerings: http://www.keypower.com/proddisp.asp...category=12VDC

-Jeff Mucha tank circuit: http://www.mp3car.com/products/shutd...ontroller.html

SuperAJ · 11-06-2003, 09:49 PM

We did a group buy on this a few years back and saved about 50 bucks each. Mine's been running great ever since

sweetrobot2k · 11-07-2003, 01:07 AM

Quote: Originally Posted by SuperAJ

We did a group buy on this a few years back and saved about 50 bucks each. Mine's been running great ever since

Awesome- i was slightly unsure that it'd fit the application, but the specs speak for themselves. i just bought one today for $197+8 for shipping- ince deal, and with Jeff Mucha's tank circuit, total is only about $240, great deal if u ask me- will work just like the Opus- plus i will have a secure amount of power- thank god my pc's bios will boot pc upon power availability detection, the shutdown unit will do teh powering off portion, cheers- i'm excited, as u can tell

SWYZ721 · 11-07-2003, 01:52 AM

Quote: Originally Posted by sweetrobot2k

Awesome- i was slightly unsure that it'd fit the application, but the specs speak for themselves. i just bought one today for $197+8 for shipping- ince deal, and with Jeff Mucha's tank circuit, total is only about $240, great deal if u ask me- will work just like the Opus- plus i will have a secure amount of power- thank god my pc's bios will boot pc upon power availability detection, the shutdown unit will do teh powering off portion, cheers- i'm excited, as u can tell

Will it supply enough power when cranking the engine?

SuperAJ · 11-07-2003, 03:24 AM

Quote: Originally Posted by SWYZ721

Will it supply enough power when cranking the engine?

No, because when you crank the engine the voltage supplied from the battery drops to around 9-10 volts, and that isn't enough to keep the PS on, or any PS at that matter that runs DC-DC.

frodobaggins · 11-07-2003, 04:51 AM

Quote: Originally Posted by SuperAJ

No, because when you crank the engine the voltage supplied from the battery drops to around 9-10 volts, and that isn't enough to keep the PS on, or any PS at that matter that runs DC-DC.

The opus works just fine through cranking

Rob Withey · 11-07-2003, 05:00 AM

Quote: Originally Posted by SuperAJ

No, because when you crank the engine the voltage supplied from the battery drops to around 9-10 volts, and that isn't enough to keep the PS on, or any PS at that matter that runs DC-DC.

My DC-DC is built using a PT5071 (input rating 7-16V, output 12v), and a PT6625 (input rating 9-16V, output 5V). I therefore see no reason why it would stop working at 9-10V, even though it is a DC-DC power supply.

Rob

SuperAJ · 11-07-2003, 11:49 AM

I guess i've been gone a while

none · 11-07-2003, 12:46 PM

Quote: Originally Posted by sweetrobot2k

-Jeff Mucha tank circuit: http://www.mp3car.com/products/shutd...ontroller.html

A shutdown controller is NOT a tank circuit. Completely different thing.

Quote: Originally Posted by SuperAJ

No, because when you crank the engine the voltage supplied from the battery drops to around 9-10 volts, and that isn't enough to keep the PS on, or any PS at that matter that runs DC-DC.

My Sproggy works fine when cranking. And if I had a PSU that didn't, I would add a tank circuit (that's what they are for.)

.