Thread Links Date Links
Thread Prev Thread Next Thread Index Date Prev Date Next Date Index

Re: Simple analog signaling for an AC adapter

On Mon, Dec 13, 2010 at 1:24 PM, Leonard Tsai <leonard.tsai@xxxxxxxxx> wrote:
 
More points add to Mark's comment.
 
Most of the AC-DC power chip companies are looking to add digital communication capability at lowest possible cost to anticipate the coming of smart grid and using PC (or other intelligent device) in home to report to user.
 

I think UPAMD could be successful if it has a bunch
of cool features/advantages that people like.  Some of
these would likely require digital communication.

I think I noted early on that the power downstream of a UPAMD
adapter can be described as a "nanogrid".  For more on that see:
  eetd.lbl.gov/ea/nordman

Also, a UPAMD adapter could report to downstream device(s) on
their own power consumption (input to the adapter) for the main
device to report out to the wider network.  One way to do that reporting
is being defined by:
  http://datatracker.ietf.org/wg/eman/charter/
(note that I am not suggesting that UPAMD adapters be required
to have IP connectivity, but rather the device they are powering would
have it.  However, IP connectivity could be a feature of more-capable
adapters.  They would benefit from a standard for low-speed wired
communications, but this is well off-track from the UPAMD charter).

--Bruce


--
Bruce Nordman
Lawrence Berkeley National Laboratory
eetd.lbl.gov/ea/nordman
BNordman@xxxxxxx
510-486-7089
m: 510-501-7943