Ir2104+ Irf540 - Page 5

Eva · 27th November 2007, 07:41 AM

Very long dead time produces a characteristic type of distortion. You can make this very obvious by playing a pure tone in the low or midrange area and increasing the volume slowly from 0.

Tekko · 27th November 2007, 03:24 PM

Crossover distortion.

zox2003 · 27th November 2007, 05:28 PM

I am currently thinking about inverter circuit for IR2011...What would be prefered circuit...Drive it with:

1.LT1016 directly
2.Use LM311 and CD4069
3.Use LM311 and Transistor inverter

Thanks

Tekko · 27th November 2007, 06:32 PM

LT1016 and a deadtime circuit to prevent/eliminate shoot through, usually an RCD circuit.

zox2003 · 27th November 2007, 06:37 PM

Can you point to example of dead-time circuit.Thanks

Tekko · 27th November 2007, 06:51 PM

Search! It´s all over the class d forum.

zox2003 · 27th November 2007, 07:15 PM

Don't you think that I have enuff deadtime internally in IR2011.

Tekko · 27th November 2007, 07:40 PM

I havent read the datasheet but i don´t think it has amny internal deadtime what so ever.

zox2003 · 27th November 2007, 07:53 PM

IR original design does not have deadtime circuit incorporated in their design at all using IR2011S.

Is it really necessary?

luka · 27th November 2007, 08:01 PM

Hi

It depends on how good are your fets... if they are fast + fast diode then you don't need it, but if you use fets like I did, then you will need it

27th November 2007, 07:41 AM	#41
Eva diyAudio Member Join Date: Oct 2003 Location: Near the sea	Very long dead time produces a characteristic type of distortion. You can make this very obvious by playing a pure tone in the low or midrange area and increasing the volume slowly from 0. __________________ I use to feel like the small child in The Emperor's New Clothes tale

27th November 2007, 08:01 PM	#50
luka diyAudio Member Join Date: Sep 2005 Location: in Slovenia :)	Hi It depends on how good are your fets... if they are fast + fast diode then you don't need it, but if you use fets like I did, then you will need it __________________ home page @ http://www.classdaudio.tk/ @ 24/7 all year long I FEEL SLOVENIA

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27th November 2007, 03:24 PM	#42
Tekko diyAudio Member Join Date: Jan 2005	Crossover distortion.

27th November 2007, 05:28 PM	#43
zox2003 diyAudio Member Join Date: Nov 2004 Location: usa	I am currently thinking about inverter circuit for IR2011...What would be prefered circuit...Drive it with: 1.LT1016 directly 2.Use LM311 and CD4069 3.Use LM311 and Transistor inverter Thanks

27th November 2007, 06:32 PM	#44
Tekko diyAudio Member Join Date: Jan 2005	LT1016 and a deadtime circuit to prevent/eliminate shoot through, usually an RCD circuit.

27th November 2007, 06:37 PM	#45
zox2003 diyAudio Member Join Date: Nov 2004 Location: usa	Can you point to example of dead-time circuit.Thanks

27th November 2007, 06:51 PM	#46
Tekko diyAudio Member Join Date: Jan 2005	Search! It´s all over the class d forum.

27th November 2007, 07:15 PM	#47
zox2003 diyAudio Member Join Date: Nov 2004 Location: usa	Don't you think that I have enuff deadtime internally in IR2011.

27th November 2007, 07:40 PM	#48
Tekko diyAudio Member Join Date: Jan 2005	I havent read the datasheet but i don´t think it has amny internal deadtime what so ever.

27th November 2007, 07:53 PM	#49
zox2003 diyAudio Member Join Date: Nov 2004 Location: usa	IR original design does not have deadtime circuit incorporated in their design at all using IR2011S. Is it really necessary?