Author Topic: Concept: battery backed up PC ATX power supply  (Read 878 times)

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Offline jmelson

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Re: Concept: battery backed up PC ATX power supply
« Reply #25 on: June 21, 2019, 08:56:19 pm »
What I'd like is to eliminate that inverter stage and use a single but high power 12VDC source to output the voltages required for a computer (+/-5V, +/-12, +3.3V), like a 300W PSU would. And to that the power supply would use the mains power to charge the battery when needed but would supply a unique, high-current 12V.
Pico PSU makes some power supplies for mini-ITX motherboards that run off 12 V DC and other voltages.  These are for lower-power machines, not the top of the line gaming monsters.  The entire PSU is a little PC board that plugs into the motherboard power connector, and has a few cables dangling for the hard drive and CD drive.

Jon
 
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Offline Stray Electron

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Re: Concept: battery backed up PC ATX power supply
« Reply #26 on: June 22, 2019, 12:30:54 am »
Why not use a 12v ATX power supply and just keep the batteries topped off via mains.  Pretty sure 12v ATX power supplies are readily available.

   I was going to say the same thing.  I picked up a bunch of embedded computers that had 12VDC power supplies that look like these from E-bay https://www.ebay.com/itm/Pico-PSU-120-12V-120Watt-DC-DC-ATX-Power-Supply-for-Mini-ITX-Mainboard/333192561048?hash=item4d93d30198:g:Z3QAAOSwfz9c1y7e.  I can't say if the E-bay ones are any good but the ones that I have look identical and came from a very demanding commercial application and I haven't found a bad one yet.  These plug directly onto the ATX power connector, connect 12 VDC to the input and away you go. They also have a cable with connectors to power the  hard drive and floppy drives.
 

Offline windsmurf

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Re: Concept: battery backed up PC ATX power supply
« Reply #27 on: June 22, 2019, 12:34:22 am »
Why not use a 12v ATX power supply and just keep the batteries topped off via mains.  Pretty sure 12v ATX power supplies are readily available.

   I was going to say the same thing.  I picked up a bunch of embedded computers that had 12VDC power supplies that look like these from E-bay https://www.ebay.com/itm/Pico-PSU-120-12V-120Watt-DC-DC-ATX-Power-Supply-for-Mini-ITX-Mainboard/333192561048?hash=item4d93d30198:g:Z3QAAOSwfz9c1y7e.  I can't say if the E-bay ones are any good but the ones that I have look identical and came from a very demanding commercial application and I haven't found a bad one yet.  These plug directly onto the ATX power connector, connect 12 VDC to the input and away you go. They also have a cable with connectors to power the  hard drive and floppy drives.

Could this be adapted to work off both AC as well as battery, effectively making it a UPS setup?
 

Offline Stray Electron

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Re: Concept: battery backed up PC ATX power supply
« Reply #28 on: June 22, 2019, 12:47:29 am »
  I don't see any reason why not.
 


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