Can anyone recommend available and reasonably priced high voltage 
driver ICs such as were originally used for eg vacuum fluorescent 
driving applications.

UDN6118A, UDN6128A are two such with 8 drivers/IC, pinout similar to 
ULN280x family but with 80V capability. Also, (and irrelevantly to the 
main query) unlike the ULN280X and ULN200x which are open collector 
inverting these are non inverting with passive output pull down and 
NPN emitter follower outputs.

However, these are 'hard to find' (not impossible) and have  a nasty 
price tag when they are available. I presume (possibly forlornly) that 
there is  a somewhat more available and better priced alternative. 
(UDN6118A are available here for ~$NZ9.50/$US7 retail falling to about 
$NZ5 / $US3.50 in 25's trade.

The number of drives per IC, whether inverting or non inverting and 
even actual drive topology are not crucial. Failing the availability 
of a suitable IC one could use any low voltage driver and discrete 
high voltage transistors (perhaps even arrays thereof) but an 
integrated solution would be desirable.



        Russell


 

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