High voltage P-FET's or PNP bipolar selection

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Petter

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Joined 2001
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 :)

Petter
 
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