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Old 26th April 2013, 03:22 PM   #1
diyAudio Member
Join Date: Nov 2012
Default Simple Class D using IR2011

Hi ;

well i designed a simple Class D amplifier but i have a problem of the Ho which swing form +40/-30V and this is bad for the top MOSFET and also for LO swings from -30/-20V which is also quite bad for the bottom MOSFET .

here is my circuit :
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so where is the problem is my circuit !!!!!!!plz help me !
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Old 26th April 2013, 03:29 PM   #2
Join Date: Jan 2005
There is no problem at all.The issue is the scope ground probe beeing referenced to the negative rail, to see HO correctly, the scope ground need to be connected to the halfbridge output before the output filter inductor.

Anyways, this is a very common clocked class d without any form of feedback loop.
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Old 28th May 2013, 11:42 PM   #3
diyAudio Member
Join Date: May 2013
HI Artasse
Could you please post clearer images of you circuits as I cannot read many of the part numbers and their values.
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