Problem With Class D amplifier..

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veinha

Member
2012-11-22 11:31 am
Hello
Following the scheme of IR (Iraudamp9) ... and a layout that I saw here in the forum set up my amplifier using IRS2092 ..

I'm using irfp90n20d

Amplificador Class D - YouTube
Amplificador Class D - YouTube

Using a transformer that provides symmetrical V 37.5 .. a voltage and low .. the circuit had difficulties to set up ..
this afternoon .. I created courage (in the last 13 days were burned 90n20d IRS2092 and 4) and turned it into 97V symmetrical ..
What happened was touched for a few seconds .. but the speaker was like a machine gun .. then I hung up and connected again .. but the same thing happened ... anyway .. the IRS2092 burned .. completing 14 IRS burned

someone here had a similar experience? that might help?

a detail is that even without sound .. the speaker was dangling .. (going forward and back ..) and must take ... causing a slight warming in FET's even without sound ..
 
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