Re: [Discuss-gnuradio] DC-DC converter

[Cory Papenfuss]

	I've used a very similar chip a few times before.  One was for an 
inversion (+14V -> -14V automotive).  Another time was for a step-down 
from +14 -> +4.5.  I'm not sure what input voltage you've got available, 
but you should be able to get 33V from a 12V in.  The duty cycle will be 
getting a big slim, though, so if you try to do it from +5 or +3.3, it'd 
be a bit ugly and you'd probably want a coupled-inductor flyback 
configuration.

	Also, check on the availability of that series of chip.  I know 
the ones I used in the past have become obsolete.

-Cory


*************************************************************************
* Cory Papenfuss                                                        *
* Electrical Engineering candidate Ph.D. graduate student               *
* Virginia Polytechnic Institute and State University                   *
*************************************************************************


On Mon, 6 Dec 2004, Ramakrishnan Muthukrishnan wrote:

> Folks,
>
> I am trying to design a 4702 RF Frontend to hook on my machine. I am trying
> to find a way to generate 33V. Do any of you have a simple circuit which
> can be built?
>
> I just saw this module, which I guess can be used for this purpose. Any
> comments?
>
>   http://focus.ti.com/lit/ds/symlink/uc2577-adj.pdf
>
> --
>  Ramakrishnan
>
>
>
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