> :: I'm interested in LED drivers capable of operating a single white
> :: LED from a single NimH cell. ie Vin ~ 0.9V to 1.5V say.
> :: Low all up circuit cost and high efficiency at say 10 mA LED
> :: current are primary requirements.
>
> How about the PR4401 or it's bigger brother (sister/sibling) from
> Prema  - www.prema.com
>
> I have one running of a NiMH AA size battery.

An extremely interesting device.
The lowest prts count I've seen.
Not enough controllability for what I'm after but the idea and 
implementation seems reasonably good. data sheet / application note is 
better than for most similar from non mainstream makers.

    http://www.prema.com/pdf/pr4401.pdf


        Russell

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