>Can anyone out there point me to an efficient solution for driving a
>couple of 1A IRLEDs from a 7-12V source, with I2C control?
>
>I can do it with a small micro to provide PWM into a conventional
>boost reg set as a constant current source, but that seems like a lot
>of messing about for something that should be a one-chip solution.

Dare I say it, but (whisper) Maxim (/whisper) probably have a suitable chip. 
They have all sorts of LED control stuff, much aimed at cell phones, but 
they do stuff for larger LEDs too.

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