[amsat-bb] Re: Solar cell charging of Li ion.

[AUVRAY GERARD]

Hello ,
It's very interesting, but I was not able to find the chip reference in the freescale web site.
Gerard  

-----Message d'origine-----
De : amsat-bb-bounces at amsat.org [mailto:amsat-bb-bounces at amsat.org] De la part de G0MRF at aol.com
Envoyé : mercredi 18 février 2009 12:54
À : amsat-bb at amsat.org
Cc : g7hia at btinternet.com
Objet : [amsat-bb] Solar cell charging of Li ion.

Hi.
 
This is a bit 'geeky' but may be useful to any cubesat builders reading the BB.
 
Freescale have a nice video on You Tube showing their new ultra low voltage DC-DC converters being used to charge a Lithium ion cell.
 
>From a single solar cell with an onload voltage of just 349mV they are
charging a lithium ion battery at 3.82V at 63mA with about 83%  efficiency.
 
_http://www.youtube.com/watch?v=7p9p2ySdcdM_ 
(http://www.youtube.com/watch?v=7p9p2ySdcdM) 
 
Sorry for the bandwidth. Geek time over.  - 
This may be useful copied to the cubesat reflector.
 
David  G0MRF
 
 
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