Menu
▾
▴
Re: [Gumstix-users] Battery management
|
From: Kirk M. <km...@ec...> - 2009-11-06 09:12:36
|
I think I read that charge management is not configured on the overos? Kirk joseph avery wrote: > So what your saying is the 3.7v lipo will work to keep the realtime > clock but the on board hardware will not be able to charge the battery > to keep it in it's normal operating range, with a lipo that could mean a > fire. That is if the battery voltage drops too low then is charged again. > I have two questions. First is what type of charge management is > provided? it would seem with just a flat 3.2 present when the main batt > is above 3.2 would suggest that a ni-cad would be best suited. > Second, can you provide the full link to the swcu50d.pdf you mention? > > > From: li...@ss... > > To: gum...@li... > > Date: Thu, 5 Nov 2009 23:55:18 +0100 > > Subject: Re: [Gumstix-users] Battery management > > > > Hi Kirk, > > > > Great news - Though one comment on the 3.7V battery for supplying the > > VBACKUP pin. > > > > Normally this pin is intended to be connected to a (rechargeable) backup > > battery on which it have the ability to charge when the main battery > voltage > > is above 3.2V. > > > > The charger is able to charge the battery up to a voltage of maximum 3.2V > > (See swcu50d.pdf - Table 7-86), so applying a 3.7V input to the pin is > > definitely higher than what most designs do. > > > > I don't think it will cause you any problems though (since the pin just > > connects to an internal LDO and a resistive divider) but just asking > you to > > keep in mind that applying a voltage larger than 3.2V might not be > the best > > tested combination - Though it's working with your setup. > > > > Great news - Keep up the good work and keep us posted > > Søren > > > > --- > > SSC Solutions ApS - Denmark - www.ssc-solutions.dk > > > > > > > -----Original Message----- > > > From: Kirk Martinez [mailto:km...@ec...] > > > Sent: Thursday, November 05, 2009 4:31 PM > > > To: General mailing list for gumstix users. > > > Subject: Re: [Gumstix-users] Battery management > > > > > > out of interest I just put a 3.7V bat onto the VBACKUP pin-12 on the > > > Summit and powered-off the main unit completely... on repower the RTC > > > is > > > there and fine! The hwclock is read by a boot-time script automatically > > > so the real time/date is not lost. > > > > > > now to see if anyone has sample code for sleep/standby/apm stuff..... > > > Kirk > > > > > > R. P. McMurphy wrote: > > > > The Overo boards do not support battery charging. The circuitry is > > > not > > > > connected to anything usable. > > > > > > > > But you can directly power the Summit with a Li-type battery. The > > > > onboard regulator will run down to ~3.4V input and still maintain the > > > > 3.3V to the Overo. > > > > > > > > On 10/6/09, No <se...@na...> wrote: > > > >> Hi list! > > > >> Anybody know how to arrange LiPo backup battery with Gumstix > > > Overo+Summit > > > >> board. Is there possibility for correct automatic charging and > > > maintenance > > > >> for battery? I guess, the processor chip has battery management > > > module, but > > > >> do how I can use it? > > > >> Serge Batov. > > > > > > > > --------------------------------------------------------------------- > > > --------- > > > > Come build with us! The BlackBerry® Developer Conference in SF, > > > CA > > > > is the only developer event you need to attend this year. Jumpstart > > > your > > > > developing skills, take BlackBerry mobile applications to market and > > > stay > > > > ahead of the curve. Join us from November 9-12, 2009. Register > > > now! > > > > http://p.sf.net/sfu/devconf > > > > _______________________________________________ > > > > gumstix-users mailing list > > > > gum...@li... > > > > https://lists.sourceforge.net/lists/listinfo/gumstix-users > > > > > > > > > > -- > > > Electronics and Computer Science > > > University of Southampton, UK > > > +44 (0)2380 594491 > > > http://www.ecs.soton.ac.uk/~km > > > > > > ----------------------------------------------------------------------- > > > ------- > > > Let Crystal Reports handle the reporting - Free Crystal Reports 2008 > > > 30-Day > > > trial. Simplify your report design, integration and deployment - and > > > focus on > > > what you do best, core application coding. Discover what's new with > > > Crystal Reports now. http://p.sf.net/sfu/bobj-july > > > _______________________________________________ > > > gumstix-users mailing list > > > gum...@li... > > > https://lists.sourceforge.net/lists/listinfo/gumstix-users > > > > > > No virus found in this incoming message. > > > Checked by AVG - www.avg.com > > > Version: 8.5.425 / Virus Database: 270.14.51/2482 - Release Date: > > > 11/05/09 07:37:00 > > > > > > > ------------------------------------------------------------------------------ > > Let Crystal Reports handle the reporting - Free Crystal Reports 2008 > 30-Day > > trial. Simplify your report design, integration and deployment - and > focus on > > what you do best, core application coding. Discover what's new with > > Crystal Reports now. http://p.sf.net/sfu/bobj-july > > _______________________________________________ > > gumstix-users mailing list > > gum...@li... > > https://lists.sourceforge.net/lists/listinfo/gumstix-users > > ------------------------------------------------------------------------ > Windows 7: Unclutter your desktop. Learn more. > <http://go.microsoft.com/?linkid=9690331&ocid=PID24727::T:WLMTAGL:ON:WL:en-US:WWL_WIN_evergreen:112009> > > > ------------------------------------------------------------------------ > > ------------------------------------------------------------------------------ > Let Crystal Reports handle the reporting - Free Crystal Reports 2008 30-Day > trial. Simplify your report design, integration and deployment - and focus on > what you do best, core application coding. Discover what's new with > Crystal Reports now. http://p.sf.net/sfu/bobj-july > > > ------------------------------------------------------------------------ > > _______________________________________________ > gumstix-users mailing list > gum...@li... > https://lists.sourceforge.net/lists/listinfo/gumstix-users -- Electronics and Computer Science University of Southampton, UK +44 (0)2380 594491 http://www.ecs.soton.ac.uk/~km |