[coreboot] LPCflasher Project

[steve at fl-eng.com]

Yes, I will get the datasheet and send you a recommened link when I get 
back to my office Monday
> 
> From: Joseph Smith <joe at settoplinux.org>
> Date: 2008/11/15 Sat PM 06:44:34 EST
> To: steve at fl-eng.com
> CC: Peter Stuge <peter at stuge.se>,  coreboot <coreboot at coreboot.org>
> Subject: Re: [coreboot] LPCflasher Project
> 
> 
> 
> 
> On Sat, 15 Nov 2008 17:18:24 -0500, <steve at fl-eng.com> wrote:
> > Hi
> > 
> > You could diode isolate the vin to a buck boost to isolate it's input and
> > you
> > can diode isolate its output to create a pseduo isolated regulator that
> > would
> > prevent reverse bias from being a big problem.
> > 
> > Typically, the output stage of a buck/buck-boost regulator is an
> inductor-
> > capacitor. The voltage on the cap is the regulated rippled/filtered
> > output.
> > Then there usually is a resistor feedback network right at the capacitor
> > to
> > feedback the cap voltage to the regulator IC and close the loop; so you
> > can
> > actually regulate the output.
> > 
> > You can usually put a diode after the inductor and before the capacitor
> to
> > pseudo isolate the output. The feedback network should still be located
> at
> > the capacitor though. This way, the regulator will achieve your desired
> > output
> > voltage (that you set through the resistor divider network) regardless of
> > the
> > diode drops.
> > 
> Ok thanks, can you point me to an example schematic on the web 
somewhere?
> 
> -- 
> Thanks,
> Joseph Smith
> Set-Top-Linux
> www.settoplinux.org
> 
> 
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