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In Reply to: RE: Vf vs If for Cree Sic Schottky Diode - Measured at cathode-relevant Currents posted by Maxamillion on July 7, 2009 at 07:04:14:
Sorry, I'm travelling at the moment. I can only remember the first I tried which were parts we happened to use in our products. These were dual SMT in a D-pak, 12CWQ03FN. The data sheet specifies a forward slope resistance (rt) of just 21.66 m Ohms and the graph bears this out. But there is one proviso and I'm perplexed to say that looking at this again in Spice for the few models I have (which I've never done before), a quick Sim indicates that at low currents (circa 10mA) rd is in the order of 2 - 5 ohms, similar to cree. This figure reduces dramatically with increasing current so I can only conclude that that even the part I've listed might be in the order of half an ohm or so at 10mA because the ultra low figure specified is undoubtedly at max current. Overall I doubt you'd hear the difference between these and cree but yes, Schottkies in general sound great and you are on the right path IMO.
Cheers,
Naz
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Follow Ups
- RE: Vf vs If for Cree Sic Schottky Diode - Measured at cathode-relevant Currents - Naz 16:49:11 07/08/09 (1)
- RE: Vf vs If for Cree Sic Schottky Diode - Measured at cathode-relevant Currents - Maxamillion 20:18:00 07/08/09 (0)
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