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Old 17th December 2011, 04:42 PM   #1
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Default Help needed with irs2092 amp

I'm building amp based on iraudamp7d reference design. I made new PCB layout, but almost same as iraudamp7d. Today I soldered it to the stage, to just test the irs2092. No output mosfets, no OCP. Only thing I managed to do is kill the irs2092. On the both output is -40V. Could someone check the PCB?
What should I check? I have a osciloscope to.
Does anyone have a tested simple as possible PCB that I could try?
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Old 19th December 2011, 12:58 AM   #2
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All you can do is go back and check your schematic for errors.

Personally I wouldnt have powered it up without the mosfets.
The amp requires feedback to oscillate.
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Old 19th December 2011, 07:13 AM   #3
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why didn't you use fets? you can solder everything on, and just don't connect main voltage... you can provide +/-5 for the IRS and about 12v for IRS gate drive

And if that all is good, you can use main voltage... you can even ramp it up slowly from +/-0v to +/- what even you have for your supply, it you can get your hands on adjustable supply, not some trafo or smps

I would never not use fets when powering up IRS
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