http://bit.ly/1Q11zbg

Currently I'm using 2 1N5822 schottkys in series.  I'd think these would=20
be fast enough, but it doesn't help.


On 11/26/2015 3:49 AM, RussellMc wrote:
> As we have not seen a circuit diagram (AFAIK) it's not 100% certain what =
is
> being done, BUT - the holding arrangement SHOULD be the equivalent of a
> buck converter with  current circulating in the inductor when the FET is
> off and the FET being PWM'd to maintain current. Properly done the FET is=
 a
> true switch and dissipation is low.
> The recirculating diode should be of suitable speed to suit the switching
> frequency - but faster does not usually hurt too much. (A sharp diode
> transition can produce substantial RF noise).
>
>     R

--=20
http://www.piclist.com/techref/piclist PIC/SX FAQ & list archive
View/change your membership options at
http://mailman.mit.edu/mailman/listinfo/piclist
.