Hi,
I'm planning on using the TPS61093 boost chip to convert from 3V3 up to a range of approximately 5V to 12V. I'd like to make this software-controllable by a 3V3 microcontroller, so I'm looking into using a digital potentiometer instead of one of the feedback resistors. My problem is that the datasheet recommends adjusting the upper resistor in the network to control output voltage, but the resultant voltage across a digital potentiometer would exceed the absolute maximum voltages of any reasonable options.
I'm then left with adjusting the lower resistor, which the datasheet simply recommends setting to 10kohm, without much other information about what this will affect other than the current through that leg of the feedback network. What factors might I need to consider if I decide to adjust that one? Is there a better way to go about controlling my output voltage?
Thanks in advance,
Bob
