Have anyone seen a USB/HD/SATA power supply for Auto use? It'd need 12V and 5V @ about .6A each.

If one exists I'd buy it.. but if not, how would you go about it? It needs to regulate to 12V during run (14V) -- but also be capable of delivering 12V during low voltage points of 12.1 or 12.2 volts. At this point I'd be satisfied if it did that, and I wouldn't worry too much about the boost scenario where the batteries go below 12V, because typically, they do not..

Naturally I could run an 120 VAC inverter and then convert to 12V. Seems wasteful though.

 

I guess you could start by logging into a forum on another site and posting your question there. This site forbids automotive talk. The Mods will likely lock this thread shortly. If I were to do it, however, I would start with the option that you are ruling out - Inverter. Creating a stable 12 volt DC supply of reasonable current will not be easy from a noisy automotive circuit running from 12 to 13.5 volts DC. Read the stats on the inverter, you are not losing too much in terms of efficiency. If your system is really relying on efficiency of making 0.6 amps, then you must be driving a Prius.

 

Have anyone seen a USB/HD/SATA power supply for Auto use? It'd need 12V and 5V @ about .6A each.

If one exists I'd buy it.. but if not, how would you go about it? It needs to regulate to 12V during run (14V) -- but also be capable of delivering 12V during low voltage points of 12.1 or 12.2 volts.

SEPIC or flyback is the way to do it. 10W total load power is not that much, lots of ICs can do this.

http://en.wikipedia.org/wiki/Single-ended_primary-inductor_converter

http://en.wikipedia.org/wiki/Flyback_converter