New subject: LPCflasher Project

16 Nov 2008


      Yes, I will get the datasheet and send you a recommened link when I get 
back to my office Monday
...
From: Joseph Smith joe@settoplinux.org
Date: 2008/11/15 Sat PM 06:44:34 EST
To: steve@fl-eng.com
CC: Peter Stuge peter@stuge.se,  coreboot coreboot@coreboot.org
Subject: Re: [coreboot] LPCflasher Project
On Sat, 15 Nov 2008 17:18:24 -0500, steve@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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