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Old 17th May 2011, 09:41 PM   #1
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Default 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.
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Old 18th May 2011, 06:20 AM   #2
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Default 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.


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Old 18th May 2011, 06:41 AM   #3
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How about the Tripath TC2000/TC2001/TCA2002?

Power output is only limited by your choice of gate driver and output FETs.
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Old 18th May 2011, 06:50 AM   #4
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Default High power class D chips

We would not touch tripath with a bargepole.
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Old 18th May 2011, 07:22 AM   #5
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Quote:
Originally Posted by MOER View Post
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.
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Old 18th May 2011, 11:39 AM   #6
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Originally Posted by theAnonymous1 View Post

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 ?
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Old 18th May 2011, 01:11 PM   #7
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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.
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Old 18th May 2011, 01:26 PM   #8
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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.
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Old 18th May 2011, 08:07 PM   #9
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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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Old 18th May 2011, 09:07 PM   #10
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damn.... that would be crazy, and they can go up to 8MHz?!?!
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