5v DC power supply for us heavy USB laptop users..

Kamakazie2 · 11-06-2006, 10:09 AM

http://www.trcelectronics.com/Meanwell/sd-50a-5.shtml

About $40 dollars and this will power up to 10amps @ 5 volts. They also have smaller versions but this gives you the most bang for the buck. Most of you may use your computer power supply but this is more of a solution for us laptop users who dont have a large power supply to start with.

It takes 9.8 to 18 volts input and regulates it to 5v output. 70% eff rating

Why 10 amps? Why not? Think of it:
2~3 amps for DVD-R drive
500mA for Wifi
250mA for Bluetooth
100mA for Shuttle express
500mA for HQCT
400mA for XM PCR
100mA for Touchscreen
50mA for mini usb keyboard
500mA for sound card (if usb)

Thats almost 7 amps!

1 powersupply to power all your usb hubs and your hqct and external DVD drive. I have used this for about 2 weeks now and everything runs great.

DarquePervert · 11-06-2006, 10:18 AM

Excellent find!

Ruffy · 11-06-2006, 04:49 PM

more specs

http://www.trcelectronics.com/Meanwell/pdf/sd50.pdf

Ripple & Noise 100mVp-p
Rated Power 50W
Voltage Tolerance +-2.0%
Line Regulation +-0.5%
Load Regulation +-0.5%
Efficiency 70%
Overload Protection 105 ~ 150% Rated output power, Fold back current limited protection
Over Voltage 5.75 ~ 6.75V /10% Load, Hiccup recovery

Working Temp -10 ~ 60Degrees Celcius, 20-90% Humidity

psyrex · 11-06-2006, 06:07 PM

I, and a couple of other people here, use the 12v one. There are 15W, 25W, and 50W models. These are just DC-DC converters -- there is no SDC.

Ruffy · 02-03-2007, 12:28 AM

I was heavily considering this one but the 70% efficiancy rating worried me. I'd rather not have a component that wastes so much power making heat. Just a thought for anyone who might want one

2k1Toaster · 02-03-2007, 12:33 AM

70% really isnt too bad for cheap regulators. As long as you dont put it in a confined space, it should be fine

Ruffy · 02-03-2007, 12:34 AM

Quote: Originally Posted by 2k1Toaster

70% really isnt too bad for cheap regulators. As long as you dont put it in a confined space, it should be fine

oh it would definitel be in a confined space. which is why im staying away

I love the fact that it has a it's own casing. Easy install with screw down terminals. But the heat man, the HEAT!

raxy · 02-03-2007, 02:30 AM

cosel is much too expensive !!!

Ruffy · 02-03-2007, 03:51 AM

Quote: Originally Posted by raxy

cosel is much too expensive !!!

Not really. You would have to buy 3 carnetix 5v POL units to get 9amps, this unit does 10 amps for only double the price of the carnetix(Actually less than double)

but alot of that will be wasted putting out heat.

Ruffy · 02-03-2007, 03:56 AM

they also have a 3amp 15watt 5v POL

http://www.trcelectronics.com/Meanwell/psd-15a-05.shtml

again lower efficiency but more components.

Enclosed
http://www.trcelectronics.com/Meanwell/sd-15a-05.shtml

5amp enclosed $32
http://www.trcelectronics.com/Meanwell/sd-25a-5.shtml

Ruffy · 02-04-2007, 12:21 AM

welp talked to my friend who has bought their 5amp unit. Apparantly it puts out tons of heat when in use and stays quite hot.

I would nmot reccomend them for anyone using them in tight confined places without actual fan cooling. Looks like I'll be getting the carnetix, if I need more amperage I can always buy two.

edit : UPDATE

got to check out my buddies rig, he drives a flatbed truck and has two units installed. a 12v and a 5v. Both got fairly hot (over 50c at least, opertating temperature is only a max of 60c...) This was with a bunch of usb devices all on. Both were installed under his passenger seat so plenty of air space but no extra cooling. If you get a meanwell consider fan cooling for best usage.

raxy · 02-04-2007, 04:40 AM

USD39 for a 12V-4.2A out 9-18V in :
http://www.trcelectronics.com/Meanwell/sd-50a-12.shtml

GibsonLP · 02-04-2007, 09:27 AM

2 questions:

1. Do you think I can put the 5vdc 5A unit in the trunk without using a fan? (however - it's in the trunk, not such a confined space).
2. In practice - how do I hook up such a unit to my units? what about units that have no power supply input, just usb input? can I just "power" my entire usb network with this unit?

Thanks.

Edit:
What do you say about this converter -
http://store.altenergystore.com/Char...nverter/p1302/
Looks pretty efficient (but expensive...)

Ruffy · 02-04-2007, 10:38 AM

Quote: Originally Posted by GibsonLP

2 questions:

1. Do you think I can put the 5vdc 5A unit in the trunk without using a fan? (however - it's in the trunk, not such a confined space).
2. In practice - how do I hook up such a unit to my units? what about units that have no power supply input, just usb input? can I just "power" my entire usb network with this unit?

Thanks.

Edit:
What do you say about this converter -
http://store.altenergystore.com/Char...nverter/p1302/
Looks pretty efficient (but expensive...)

Nice find but yes very very expensive for only 5 amps. You could get 2 carnetix 5v POL's for $50 and end up with working amps.

1: As for the meanwell. Mounting in the trunk should be fine. but I'm not going to risk it. The psu is going to be enclosed with my laptop underneath a panel of wood. I am going to be using fans to circulate air in and out of the enclosure but not alot of them. After feeling how hot the meanwell got I wouldn't reccomend using it any tight enclosed areas. If you mounted it to the widewall or top deck of the trunk then it should be fine. but behind carpet would be a no no.

2: You can either splice the cable. Buy a USB dual head cable and splice into the extra connector. Or just use one of these devices to power a USB hub. That way all your devices get max power. Remember at most a usb device used 500mA And thats only the high end stuff. Very few items surpass that (some usb drives) To overcome that they almost always include a secondary input jack. But everything else generally gets its power off the usb bus so a powered usb hub is the win.

miztahsparklez · 05-17-2007, 03:05 AM

sigh i wish i would have read thoroughly before i ordered. im in the process of installing mine. i think overloading my p5v was causing instability of my computer system. I wanted something inexpensive to supplement the p5v so i bought the 10 amp system listed above. the main thing that worries me is that this will be under a floor with many other hot devices, such as amplifiers and my carputer.

anyone know what i can do to make this work out?

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