When I tried decreasing the sample interval, all that happened was that the micro overshot significantly because the capacitor was able to flatten the rising or falling voltage. Unfortunately I am away from my bench right now so I can not do more testing, but the get close then test method seemed to work pretty well. I just need to trim some timing values and it should be pretty reliable. On Feb 20, 2:27 pm, GastonP <[email protected]> wrote: > It is not that the voltage could not be attained, but that the > feedback loop response time was too short. > There is a lot of good documentation on SMPS on the TI site. All the > information regarding to feedback loop design as well as switcher > topology applies whether you are using or not an analog IC to do the > switcher control. > > On Feb 19, 12:49 pm, will <[email protected]> wrote: > I re-did the code to find > > > > > the closest possible match to the ideal voltage, and then every 500ms > > the code checks to see if the voltage has swung too much, and if it > > has it simply repeats the process. The voltage is now very flat. > > > On Feb 19, 5:05 am, "MrNixie (UK)" <[email protected]> > > wrote: > > > > Simplest way is to increase the output > > > capacitance to something like 4.7uF or there abouts. That dampens the > > > load, and gives the feedback lops time to react.
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