Re: a lot of switching mode power supply design questions




maxim one is high-side current sensing with 20x gain.
it does carry 10A but I list my questions above.
thanks.






On May 25, 6:40 pm, MooseFET <kensm...@xxxxxxxxx> wrote:
On May 25, 4:32 pm, legg <l...@xxxxxxxxxxxxxxx> wrote:



On Sun, 25 May 2008 12:42:53 -0400, Jamie

<jamie_ka1lpa_not_valid_after_ka1l...@xxxxxxxxxxx> wrote:
Jim Thompson wrote:

Where do you get "non-enhanced" mode MOSFET's in the discrete world?
They are even rare in my integrated circuit world.

...Jim Thompson
well, that's the common symbol used late time I checked.

http://www.rocw.raifoundation.org/computing/BCA/faultdiagnosisofdigit...

and after looking, I would say if this information is correct, he's
using a P-channel which also could be an issue here.

But then again, maybe incorrect footprints are being used.

http://webpages.charter.net/jamie_5";

Consult whoever drew the schematic.

Assuming he meant NMOS, what part did you actually throw in there?
This could be a very low-current curcuit, in which case anything in a
to220 body may be overkill. Not possible to comment without frequency
and component value info (unreadable).

Can't make out what's on the other end of the load, either, from the
drawing text resolution; some kind of Maxim part.

Well tbat at least suggests the Maxim has really shipped a part.
Maybe it doesn't really work as the OP thinks it does.



RL

.

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