Normally-off fet rectifier

[legg]

ON semi has come up with an integrated version of the

normally-off fet rectifier - useful in orring diode or synchronous
rectification applications, due to it's self-synchronizing characteristics.

http://www.onsemi.com/pub/Collateral/NIS6111-D.PDF
http://www.onsemi.com/site/products/summary/0,4450,NIS6111,00.html#appsnotes

Discrete implimentations date back some period of time. Some
application models in swcadIII posted at:

http://members.shaw.ca/legg/1994d.html

IR now has an integrated controller operating on the same principal,
for redundant telecom negative bus control. This is one of the few
applications where the negative output terminal is not a ground
reference, removing the requirement for 'skyhook' power when driving
NMos.

http://www.irf.com/product-info/datasheets/data/ir5001s.pdf

Again, it's digital. Sigh......

RL