1 cell to 3v3
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Posted by Anthony C Smith on May 5, 2006, 10:46 am
Please log in for more thread options has anyone any advice/pointers on using one AA cell to get 3v3? I have looked at chips from Linear, Maxim and Nat Semi, but before plodding down a path with one would like to hear from users of these for pitfalls recomendations etc. I want to power a little audio amplifier for headphones from the cell, and want a single AA to keep the enclosure small. any advice or pointers to other methods gratefully appreciated. regards Anthony | ||||||||||||||||||||||
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Posted by John Fields on May 5, 2006, 11:56 am
Please log in for more thread options On Fri, 5 May 2006 15:46:01 +0100, "Anthony C Smith" >has anyone any advice/pointers on using one AA cell to get 3v3?
--- 3v3? Oh, then, you must mean an A² cell. -- John Fields Professional Circuit Designer | ||||||||||||||||||||||
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Posted by John_H on May 5, 2006, 12:19 pm
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> has anyone any advice/pointers on using one AA cell to get 3v3?
> I have looked at chips from Linear, Maxim and Nat Semi, but before > plodding down a path with one would like to hear from users of these for > pitfalls recomendations etc. > I want to power a little audio amplifier for headphones from the cell, and > want a single AA to keep the enclosure small. > any advice or pointers to other methods gratefully appreciated. > regards > Anthony What current are you targeting? I'd expect there aren't many pitfalls associated with these devices. Just look for startup voltages that are compatible with low-battery conditions and efficiencies that will allow the one cell to last a while. You may be able to get a demo board for a reasonable price ($20?) from one of those companies. | ||||||||||||||||||||||
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Posted by Joerg on May 5, 2006, 1:14 pm
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Hello Anthony, > has anyone any advice/pointers on using one AA cell to get 3v3?
> I have looked at chips from Linear, Maxim and Nat Semi, but before plodding > down a path with one would like to hear from users of these for pitfalls > recomendations etc. > I want to power a little audio amplifier for headphones from the cell, and > want a single AA to keep the enclosure small. > any advice or pointers to other methods gratefully appreciated. What pitfalls? Look at the TPS61xxx family from Texas. Around a Dollar in quantities. Regards, Joerg http://www.analogconsultants.com | ||||||||||||||||||||||
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Posted by Anthony C Smith on May 8, 2006, 2:33 am
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> Hello Anthony,
Thanks - I didn't even know of these parts-
> What pitfalls? Look at the TPS61xxx family from Texas. Around a Dollar > in quantities. > > Regards, Joerg BTW the current I am after is about 30mA, with peaks of 70 mA with audio (probably from storage caps inductor isolated from the feedback loop output cap to preserve stability) Does anyone know of a discreet version to save being manufacturer tied? or am I peeing in the wind? Anthony | ||||||||||||||||||||||
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