which mp3car power supply suits my pc board?

[qha_vn]

Hi all,

i am installing my carpc, i use pc board ECM-CX700 from avalue.com.tw. pix is here



i am now using an ATX PSU from my old desktop to power it up as a work bench power supply. setup has completed with great RR front end now is the time to put it in the car but i dont have a PSU with startup shutdown controler

i checked out mp3car store and dont really know which one is suitable for my mobo as it doesnt have normal 20 pin atx connector but only a 4 pin (see pix)

could someone please advise which PSU is suitable

thanks

[qha_vn]

40 reads, no advise. would it be that hard?

[DarquePervert]

I suggest a 12v regulator.
I also suggest reading the FAQs about choosing a power supply: http://www.mp3car.com/vbulletin/advfaq.php

[FusionFanatic]

according to the specs for that board (on avalue.com.tw), it can be powered with a "Single 5V ATX or 5V/12V ATX Power Input".

power consumption is:

• Power Consumption: +5V@3.5A, +12V@0.1A (with VIA Eden 1.5GHz & 1 GB DDR2 533 SDRAM)
• Power Type: AT/ATX Power

"intelligent automotive ATX PSUs" have built-in startup/shutdown controllers. the M1-ATX can handle that system with ease (and it's the cheapest "intelligent" PSU in the MP3car store ). it can provide 10A@5V and 2A@12V which leaves you plenty of headroom for additional components. use a laptop HDD (which gets its power from the 5v rail) and you'll have enough power on the 12v rail to power your monitor (most 7" or 8" LCD monitors use less than 1A).

good luck

[DarquePervert]

But it's also specifically designed for an ATX board.
I'm not saying it can't be used or wouldn't work. But there are cleaner, more elegant solutions for this setup.

[FusionFanatic]

I would think that an "all-in-one" device like the M1-ATX (or other intelligent PSU) is the most 'elegant' solution possible in this case...

otherwise you would need 2 or 3 separate devices to get the equivilent funtionality. you would need a startup/shutdown controller, +5v DC-DC regulator, and [possibly] a +12v DC-DC regulator.

[qha_vn]

thanks all for your inputs, i also think M1-ATX looks ok for my mobo, but i am just wondering how the board communicate with M1 for turning on and off the PSU if i dont use the 20 pin ATX connector

[DarquePervert]

Quote: Originally Posted by FusionFanatic

I would think that an "all-in-one" device like the M1-ATX (or other intelligent PSU) is the most 'elegant' solution possible in this case...

Considering the M-series PSUs are designed for an ATX motherboard (which this is not), you have to "fool" the PSU into recognizing a connection (shorting pins 13 & 14 on the 20-pin ATX connector).
In my mind, that's not particularly elegant.

There are 12v DC-DC regulators available that need nothing more than a connector for the motherboard.

Quote:

otherwise you would need 2 or 3 separate devices to get the equivilent funtionality. you would need a startup/shutdown controller, +5v DC-DC regulator, and [possibly] a +12v DC-DC regulator.

Hey wow...
A Carnetix P2140 has all of this built-in.
Looks pretty elegant to me....

But what do I know. I've only installed a few vehicle PCs...

[FusionFanatic]

Quote: Originally Posted by DarquePervert

Considering the M-series PSUs are designed for an ATX motherboard (which this is not), you have to "fool" the PSU into recognizing a connection (shorting pins 13 & 14 on the 20-pin ATX connector).

true... but that's very easy to do.

Quote: Originally Posted by DarquePervert

There are 12v DC-DC regulators available that need nothing more than a connector for the motherboard.

true... but that doesn't make it any easier.

Quote: Originally Posted by DarquePervert

Hey wow...
A Carnetix P2140 has all of this built-in.

it has the features built-in, but it can only provide 3A on the +5v [secondary] output. that motherboard requires at least 3.5A @+5v. 2 separate devices would still be necessary. not very elegant if you ask me

[KryptonianJorel]

But if your mobo can take 12v and not just 5v, you can still use the 2140. The 12v primary line provides 11 amps