I've got a burnt out old PSE amplifier with two very stout transformers and decent heatsinking (but not PASS sufficient) that I would like to bring back into the fold.
Only issue is the transformers are 1 primary, 1 secondary each, and rectified are putting out 50V. I know this is way too much for the usual LM suspects, but would think that someone out in chip land would know something I don't. (that last part isn't really that hard)
Only issue is the transformers are 1 primary, 1 secondary each, and rectified are putting out 50V. I know this is way too much for the usual LM suspects, but would think that someone out in chip land would know something I don't. (that last part isn't really that hard)
Some of the older TO-3 style LM amps should be able to do it, but those had unusual distortion specs IIRC.
The LME49830 with a few output transistors will get you there. Schematics and kits easily available from the forum. they are not very difficult to build, but slightly more involved than slapping a chip in.
Some of the STK series also do it, but those are obsolete chips. I forgot which ones are rated to 55 and 70 volts or so, but there were some.
The LME49830 with a few output transistors will get you there. Schematics and kits easily available from the forum. they are not very difficult to build, but slightly more involved than slapping a chip in.
Some of the STK series also do it, but those are obsolete chips. I forgot which ones are rated to 55 and 70 volts or so, but there were some.
http://www.coldamp.com/opencms/open...s/class_d_amplifier_modules/BP4078/index.html
Only it's a module, not a chip.
Only it's a module, not a chip.
The TDA7293 can handle +/-50v dc and the datasheet has a single sided PCB design you can etch...
http://www.datasheetcatalog.org/datasheet2/9/0ozxelyhtgfl5jsx9108fj3sqq3y.pdf
Cheers
http://www.datasheetcatalog.org/datasheet2/9/0ozxelyhtgfl5jsx9108fj3sqq3y.pdf
Cheers
Thanks for the suggestions... I was just hoping that I could do this on the cheap with some recycled parts. Maybe if I run across some of the T-03 packaged chips I could wire it up.
Minion said:
I didn't see your post until now. That looks like a doable chip. Seems I can also skip the etching and just by a board from a couple of different ebay sellers. 100 W is probably 80 W more than I need, but I'm sure I can put it to use somewhere.
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