IR2010 amplifier-New Project

[Tekko]

also called shoot through, most commonly caused by too little or no deadtime.

[zox2003]

I GOT AMPLIFIER RUNNING NICE...Adjusting dead time helped a lot..My FET's are not running hot anymore (dead time RCD= 2K+220p),amplifier sounds a lot nicer and powerfull.There is still some ringing on gates but I think that reason is my layout.This is prototype anyway and I will start working on final layout with a lot improvements.I am posting pictures of current layout and you are guys more then welcome to make comments and suggestions.
BIG THANKS to everybody but specialy to Eva and Luka for help on this little project.I will keep you updated on regular basis.I will post schematic soon and layout after that.

Here are two pictures:

P.S Little vertical board is modulator(LM311) and inverter (CD4069)-SMD

[zox2003]

here is a bottom side:

[Eva]

Concerning dead time, remember that you should tune the circuit for as little dead time as possible and check how it drifts with temperature. 2K and 220p produce almost 360ns delay (for V/2), this is really high The 30ns provided by the IR2010 should be already enough if the input signals don't overlap and the gates are charged and discharged reasonably fast.

Concerning the output inductor, you should not place it that close to the modulator. Toroid magnetic leakage only tends to cancel in the far field. To understand this, you can try making a little loop antena by connecting the ground lead of an oscilloscope probe to the tip and "sniffing" with it in different directions and positions around the toroid inductor...

[lindomar]

Is sigma-delta or based in Freedos amplifier "PWM"?

[zox2003]

I have two modulator versions:

1. self-oscillating (LM311+CD4069)

and

2. triangle-wave generator (TL082),preampl(TL082) and comparator (LT1016)

Both of this boards are swapable (with little modification in feedback) on same amplifier motherboard (they are vertical PCB on motherboard).

As far as how they compare-----they are sounding about same.

[Tekko]

put the feedback componentsd on the daughter boards and you only need to swap board

[zox2003]

Here is first step in new PCB Layout.I just did first part of new layout-modulator.Line around components is Ground and it will be conected to GND on top (directly) and thru vias to GND on bottom side.Area where components are ,will be "covered" on bottom side with GND also.So this is just first piece of PCB.I will keep working on it and post pictures here for your comments and suggestions:

[G4ME]

would you mind posting a full schematic of you your final design?

I have been trying to get the IR2011 to work for the past few weeks and i can't seem to be making any progress.

Thanks

[zox2003]

I will post schematic as soon as I combine all pieces together.I am using IR2010 (not IR2011).
Here is update on PCB(almost done):
Comments welcome...