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Ah interesting problem Warren.... why is it
over-current?? if it is over-current because a high voltage has welded/melted a
short between drain and source, then the protection wont help ....high
currents usually lead to excess heating ......but what is the real cause? If you
really need DC supply protection would not a high-side current monitor be
easier/faster??? The problem then could be there is enough energy stored in the
PA choke to zap the FET before, or even if, you can disconnect the
supply.
OK drive fails permanently on might be a condition
it would protect the FETs against with DC coupled drive
Alan G3NYK
----- Original Message -----
Sent: Monday, April 08, 2013 7:15
PM
Subject: LF: Hall Effect for Over-current
shutdown?
Anyone using a Hall effect device for overcurrent sensing and
shutdown in a MOSFET amplifer?
-- 73 Warren K2ORS
WD2XGJ
WD2XSH/23
WE2XEB/2
WE2XGR/1
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