> Here asking for some help in the design of a DC to DC Converter.
> I have a solar panel with 96 to 100 VDC @ 1.1Ah without load, break
> point at 97 VDC and down to 60 VDC @ 0.9 Ah with load.
>
> The idea is to make a DC-DC converter from an input of 97 to 60 VDC to
> an output of 14 VDC more or less at 3Ah, this output will be used to
> charge a battery system.
>
> Can be possible to do this converter without any inductive device?

Not effectively, but if the question is "is it possible to build a DC-DC
converter without inductors" the answer is yes. Switched capacitor
converters are commonly used for small boost converters (think MAX232). I
guess it would be _possible_ to reverse the general process, that is charge
several capacitors in series and discharge them in parallel. But I've never
seen a switched capacitor converter rated for more than a few milliamps. So
yes, it's _possible_, but I can't recommend it.


Here's an off the wall idea- what about a regular switch mode wall wart /
power brick? The one running my LCD monitor as I type this is rated as 4 A @
12V output, 90-240V AC input. Granted that's an AC input but the way these
things work is they rectify and filter the input voltage before it goes to
the switching stage. If you just tapped the output of your panel to the
internal HV DC rail...
60V with full load is a little low, but it's worth a try

-Denny

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