High voltage P-FET's or PNP bipolar selection - diyAudio
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Old 7th October 2002, 10:31 PM   #1
diyAudio Member
Join Date: Jan 2001
Location: Scandinavia
Default High voltage P-FET's or PNP bipolar selection

I am in need of high voltage P-type power transistors for audio use. Requirements are:

450V breakdown minimum
400V normal duty
Current 30mA with 15mA swing superimposed.
normal power dissipation (on heatsink) more than 12-15W each
Topology: Folded Cascode

I would ideally prefer MOSFET's but would be relatively happy with relatively high beta bipolars.

Any assistance in selecting suitable devices would be most welcome. I have searched IRF, Zetex and a few others without great success

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Old 7th October 2002, 11:21 PM   #2
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Join Date: Mar 2002
Default how 'bout these?

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Old 8th October 2002, 11:04 AM   #3
diyAudio Member
Join Date: Jan 2001
Location: Scandinavia
Thanks, will check them out. Also found some from Fairchild Semiconductor that appear good.

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