Another possibility is some audio power amp (driver) chip like the
(discontinued) LM391, which can have +/-50V power supplies. Can anyone
think of a currently available chip like this?

Harold

>> The application is getting a 0 to -45VDC output from the MTX-DE48
>> at http://www.dovesystems.com . As it is, I can get about 0 to +30V
>> or 0 to -30V out of it (48 channels of it). Doing a discrete output
>> stage seems like it'd take 3 or 4 transistors per output. Sure
>> would be nice to be on a chip!
>
> Discrete transistors still might be cheaper than high voltage op-amps.
> As for high voltage op-amps, LM343 (obsolete now) comes to mind which
> was often used in mil equipment and can go upto +/- 34V. Its still
> available from surplus stores but is quite expensive. And its in a metal
> can package nowhere near being pin compatible to LM324.
>
> Come to think of it all op-amps that I've seen that go in the 60V range
> have been in metal can packaging.
>
> Shahid
>
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