From: John S. <jus...@ya...> - 2010-08-16 13:45:05
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Hello all, What is the maximum allowed input voltage of the Overo Air with a Summit expansion board? I would like to use an existing 7.4V/2000mAh battery pack but I'm unsure if this will damage the Overo Air? I checked the Gumstix website and did some Googling but I couldn't find a definitive answer. Thanks in advance, John -- View this message in context: http://old.nabble.com/Overo-Air-Maximum-Voltage-tp29449156p29449156.html Sent from the Gumstix mailing list archive at Nabble.com. |
From: Joshua B. <ian...@gm...> - 2010-08-16 16:35:51
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4.5 Volts. The limit is from the TI TPS65950 power manager on the Overo. See http://www.gumstix.net/Hardware/view/Benchmarks-power-temperatures/Power-Overo/112.html and link to the latest TI docs for the 65950. The Expansion boards can take more since they have more regulators on board, the Summit can take up to 5.5 at VBatt because of the board's regulator bulk capacitor http://pubs.gumstix.com/boards/SUMMIT/PCB30001-R2185/PCB30001.pdf. The spirit of the design I think was single cells of Lithium Polymer batteries, think Cell phone. Why not just get a cell of twice the mAh and keep the voltage down to 3.6 to 4.2? It would be the same size and be more efficient. John Swarbrick wrote: > > Hello all, > > What is the maximum allowed input voltage of the Overo Air with a Summit > expansion board? > > I would like to use an existing 7.4V/2000mAh battery pack but I'm unsure > if this will damage the Overo Air? > > I checked the Gumstix website and did some Googling but I couldn't find a > definitive answer. > > Thanks in advance, > > John > > -- View this message in context: http://old.nabble.com/Overo-Air-Maximum-Voltage-tp29449156p29449175.html Sent from the Gumstix mailing list archive at Nabble.com. |