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smanders · 06-30-2003, 10:38 PM

I have also done some of my own research in this area and talk to several hardware engineers that design these kinds of power supplies.

Most regulators that can supply some higher current require a minimum Voltage drop of 1.5V, most are around 3V as stated earlier. You could build a low-volt drop out regulator but when the voltage drops near 12V, it will not be regulated which could be bad. Also during starts the voltage can drop to 11V or even 10V which could do some damage. The DIY solution would be a two-stage voltage regulator. I would find one that boost voltage to 24V then use a switcher 12V regulator. One I found was LM2679. Funny now you have just built a DC-DC converter.

I have opted to just get Opus Solutions new 90W PSU whenever it becomes available.

Good Luck,
smanders

06-30-2003, 10:38 PM	#8
smanders Newbie Join Date: Jun 2003 Location: Raleigh, NC Posts: 33	I have also done some of my own research in this area and talk to several hardware engineers that design these kinds of power supplies. Most regulators that can supply some higher current require a minimum Voltage drop of 1.5V, most are around 3V as stated earlier. You could build a low-volt drop out regulator but when the voltage drops near 12V, it will not be regulated which could be bad. Also during starts the voltage can drop to 11V or even 10V which could do some damage. The DIY solution would be a two-stage voltage regulator. I would find one that boost voltage to 24V then use a switcher 12V regulator. One I found was LM2679. Funny now you have just built a DC-DC converter. I have opted to just get Opus Solutions new 90W PSU whenever it becomes available. Good Luck, smanders __________________ EvoVIII CarPC EPIA M10000, 256MB, 3.5" 10GB HD, TEAC Slim DVD, USB Linksys WiFi, USB InCarCamera, Opus 90W PSU, Earthmate GPS, iGuidance GPS Software, Home Brew Case, Microphone, DWW-700M