Bob Blick wrote:
> Are you using an approved type of inductor? Because what pops into
> mind is that your are transitioning to continuous mode and the quick
> inductance drop puts you in and out of a parasitic state of loop
> instability. You can either use a bigger inductor of the same type, or
> go to one that is more forgiving with continuous DC.

Hmm.  Continuous mode should have lower peak current than discontinuous
mode, and therefore less likely to hit inductor saturation.  However, the
loop conpensation requirements could well be different between the two
modes.  If your loop is highly tuned that could be a problem.


********************************************************************
Embed Inc, Littleton Massachusetts, http://www.embedinc.com/products
(978) 742-9014.  Gold level PIC consultants since 2000.
-- 
http://www.piclist.com PIC/SX FAQ & list archive
View/change your membership options at
http://mailman.mit.edu/mailman/listinfo/piclist