Sold/Expired Suggestions for 17.5V step up (boost) LED driver

[Phaethon]

Looking for a driver to feed an edipower 20W LED, preferably compatible with a pwm circuit (microprocessor control maybe?) based on the LM555. Max current must be 1,1Amp, available battery consist of 4x3.7V elements. Current selection would be nice as well.....:thinking:

 

[monkeyboy]

Take a look at the Maxflex or CCHIPO
http://www.taskled.com/products.html

 

[Phaethon]

Take a look at the Maxflex or CCHIPO
http://www.taskled.com/products.html

I have already contacted george on these, it won't work with pwm. Only the fatman would work for sure, but it's 16V max output :shakehead