freeskier89
New Member
Hey there,
My goal is to deliver anywhere from 10 to 100mA into a 500-1000 ohm load and I need to be able to set the current with a microcontroller. And to top it off I need to do all this from two series AAA NiMH cells (2.4V). I won't need to deliver 100mA at 100V continuously from two AAAs; the output will be delivered in pulses, where I plan to store and release the charge from a tank capacitor.
So my main question is how feasible is it to design a switching boost regulator that boosts 2V to 100V? Do you guys have any good resources to find more about the practical design of boost regulators? Or do you have any advice yourself?
I am trying to figure out how I am going to layout this architecture. My initial thought is that everything (including the microcontroller) should be powered with 1.8V so I don't have to do dual step up conversions because then I would be multiplying efficiency losses for the two conversions. Also there will be quite a bit of time where the load will be getting no power, and I don't want the wasted power of the first 1.8V to system voltage boost regulator running full bore.
Sorry for that confusing description. I attached a graphic of the general layout of the circuit. Do you think everything looks fine? This super-simplified diagram is only to be looked at to get an idea of the structure I am talking about. There are obviously small things that I omitted and such.
Please let me know if you want me to elaborate/reword. Thanks a ton!
My goal is to deliver anywhere from 10 to 100mA into a 500-1000 ohm load and I need to be able to set the current with a microcontroller. And to top it off I need to do all this from two series AAA NiMH cells (2.4V). I won't need to deliver 100mA at 100V continuously from two AAAs; the output will be delivered in pulses, where I plan to store and release the charge from a tank capacitor.
So my main question is how feasible is it to design a switching boost regulator that boosts 2V to 100V? Do you guys have any good resources to find more about the practical design of boost regulators? Or do you have any advice yourself?
I am trying to figure out how I am going to layout this architecture. My initial thought is that everything (including the microcontroller) should be powered with 1.8V so I don't have to do dual step up conversions because then I would be multiplying efficiency losses for the two conversions. Also there will be quite a bit of time where the load will be getting no power, and I don't want the wasted power of the first 1.8V to system voltage boost regulator running full bore.
Sorry for that confusing description. I attached a graphic of the general layout of the circuit. Do you think everything looks fine? This super-simplified diagram is only to be looked at to get an idea of the structure I am talking about. There are obviously small things that I omitted and such.
Please let me know if you want me to elaborate/reword. Thanks a ton!