[coreboot] LPCflasher Project
joe at settoplinux.org
Sun Nov 16 00:44:34 CET 2008
On Sat, 15 Nov 2008 17:18:24 -0500, <steve at fl-eng.com> wrote:
> You could diode isolate the vin to a buck boost to isolate it's input and
> can diode isolate its output to create a pseduo isolated regulator that
> prevent reverse bias from being a big problem.
> Typically, the output stage of a buck/buck-boost regulator is an
> capacitor. The voltage on the cap is the regulated rippled/filtered
> Then there usually is a resistor feedback network right at the capacitor
> feedback the cap voltage to the regulator IC and close the loop; so you
> actually regulate the output.
> You can usually put a diode after the inductor and before the capacitor
> pseudo isolate the output. The feedback network should still be located
> the capacitor though. This way, the regulator will achieve your desired
> voltage (that you set through the resistor divider network) regardless of
> diode drops.
Ok thanks, can you point me to an example schematic on the web somewhere?
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