On 4/17/07, Mike Harrison wrote: > On Tue, 17 Apr 2007 23:51:13 +1200, you wrote: > > >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. > > Supertex do a range of HV drivers ( e.g. HV5522) , some stocked by Mouser, ,but MPSA42/FMMTA42 > transistors are hard to beat on cost and availability. 80V range: BC846 $0.023 300V range: MMBTA42 $0.048 MPSA42 $0.047 -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist