No, the diode you linked in the OP can be run using the BB driver with the two batteries you specified there, as well. It has analog modulation and is relatively inexpensive compared to everything you were trying to do at first.But isn't the blackbuck just a buck? I think, I will need a buck/boost for my application ...
That is precisely what Cyparagon suggestedSo, a microcontroler to a DAC that produces a voltage. you want that voltage to control the current supply?
How about using a EPOT (MCP4017T-104E/LT).
EPOT (Digital Potentiometer) is like a DAC but it outputs resistance.
Use the epot in place of the adjustable Potentiometer on the current source FB area.
As an added bonus, with the right resistors you can set a absolute max current.
Nikolas,R2,R3,R4 and R5 are the current output range select resistors.