High power Class D chip solution.

nigelwright7557 · 17th May 2011, 09:41 PM

Has any one got any suggestions for a class d chip I can use for high power applications ?

I have used the irs2092 but am not 100% happy with it.

Looking to design 500-2000 watt amplifiers.

MOER · 18th May 2011, 06:20 AM

There are no chips available which can withstand > +/-100v and will run at 350-600KHz.

The only chip that we have tried for full range is the IRS21834 but it has a large propagation delay which precludes it from the higher clock.

Our company produces full range high end class D amplifiers for the home and mobile markets.

After much soul searching for a decent high power (>1,000w at 4 ohm) I have moved away from class D and used a class B with a signal tracking supply in addition to a stepped rail switcher. So the efficiency is very high and I do not suffer from the issues of class D amplifiers.

Steve Mantz
Zed Audio

theAnonymous1 · 18th May 2011, 06:41 AM

How about the Tripath TC2000/TC2001/TCA2002?

Power output is only limited by your choice of gate driver and output FETs.

MOER · 18th May 2011, 06:50 AM

We would not touch tripath with a bargepole.

theAnonymous1 · 18th May 2011, 07:22 AM

Quote:

Originally Posted by MOER

We would not touch tripath with a bargepole.

Yes well, you are not the one who is asking for suggestions either.

BTW, my dream TCA2002 design would use IX6R11S6 + IRFP4227.

TheDealer · 18th May 2011, 11:39 AM

Quote:

Originally Posted by theAnonymous1

BTW, my dream TCA2002 design would use IX6R11S6 + IRFP4227.

Hi,
What is the main difference for example to the TA3020 ? I know that this chip can drive MOS-FETs up to 300 W per channel. Is it a controller + powerchip in one unit and the TCA2002 only a controller ?

theAnonymous1 · 18th May 2011, 01:11 PM

Quote:

Originally Posted by TheDealer

Hi,
What is the main difference for example to the TA3020 ? I know that this chip can drive MOS-FETs up to 300 W per channel. Is it a controller + powerchip in one unit and the TCA2002 only a controller ?

Because of the gate driver that's built in to the TA3020, it has a max supply limit of +/-65V.

The TC(A)200x is just a controller/modulator, so the max supply voltage for a design based on this IC will only be limited by the chosen gate driver and FETs.

TheDealer · 18th May 2011, 01:26 PM

Quote:

Originally Posted by theAnonymous1

Because of the gate driver that's built in to the TA3020, it has a max supply limit of +/-65V.

The TC(A)200x is just a controller/modulator, so the max supply voltage for a design based on this IC will only be limited by the chosen gate driver and FETs.

Thanks much. O.K. this means more design space for the the TC(A) units.
Hope also to realize one day a hit powerful amp with one of these Tripaths.

carvinguy · 18th May 2011, 08:07 PM

I'm curious if anyone has looked at these class-D drivers from Silicon Labs. Haven't seen anyone using these yet.

Supplies can be up to +/-750V

and adjustable dead time down to less than a nS. Still, you need to provide the modulator and all protections.

luka · 18th May 2011, 09:07 PM

damn.... that would be crazy, and they can go up to 8MHz?!?!

17th May 2011, 09:41 PM	#1
nigelwright7557 diyAudio Member Join Date: Apr 2008 Location: Carlisle, England	High power Class D chip solution. Has any one got any suggestions for a class d chip I can use for high power applications ? I have used the irs2092 but am not 100% happy with it. Looking to design 500-2000 watt amplifiers. __________________ http://www.murtonpikesystems.co.uk PCBCAD40 pcb design software.

18th May 2011, 06:20 AM	#2
MOER diyAudio Member Join Date: Aug 2003 Location: SIMI VALLEY CA	High power class D chips There are no chips available which can withstand > +/-100v and will run at 350-600KHz. The only chip that we have tried for full range is the IRS21834 but it has a large propagation delay which precludes it from the higher clock. Our company produces full range high end class D amplifiers for the home and mobile markets. After much soul searching for a decent high power (>1,000w at 4 ohm) I have moved away from class D and used a class B with a signal tracking supply in addition to a stepped rail switcher. So the efficiency is very high and I do not suffer from the issues of class D amplifiers. Steve Mantz Zed Audio

18th May 2011, 06:41 AM	#3
theAnonymous1 diyAudio Member Join Date: Feb 2004 Location: Anonymityville	How about the Tripath TC2000/TC2001/TCA2002? Power output is only limited by your choice of gate driver and output FETs. __________________ "If you don't like funerals don't kick sand in Ninja's face." - Ninja

18th May 2011, 06:50 AM	#4
MOER diyAudio Member Join Date: Aug 2003 Location: SIMI VALLEY CA	High power class D chips We would not touch tripath with a bargepole.

18th May 2011, 09:07 PM	#10
luka diyAudio Member Join Date: Sep 2005 Location: in Slovenia :)	damn.... that would be crazy, and they can go up to 8MHz?!?! __________________ home page @ http://www.classdaudio.co.cc @ 24/7 all year long I FEEL SLOVENIA


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18th May 2011, 08:07 PM	#9
carvinguy diyAudio Member Join Date: Jan 2005 Location: So. California, USA	I'm curious if anyone has looked at these class-D drivers from Silicon Labs. Haven't seen anyone using these yet. Supplies can be up to +/-750V and adjustable dead time down to less than a nS. Still, you need to provide the modulator and all protections.

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