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Old 29th December 2007, 04:07 AM   #1
fredos is offline fredos  Canada
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Default Interesting IGBT for class d...

http://ixdev.ixys.com/DataSheet/99169.pdf

Seem promissing...

Look how fast is it for an IGBT...
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Old 29th December 2007, 11:52 AM   #2
Eva is offline Eva  Spain
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There is a trade between Vce-sat and fall time in IGBT. Check HGTG30N60A4D for example, it has 25% lower Vce-sat at 30A at the expense of 25% higher Eoff (ignore switching times, they have little meaning).
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Old 29th December 2007, 01:59 PM   #3
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Looks Tempting, should be tried definately........
http://ixdev.ixys.com/DataSheet/99044.pdf
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Old 12th August 2010, 10:13 PM   #4
celsosc is offline celsosc  Portugal
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Hello, I already posted in the Solid State section, but I think it's more appropriate to post in the Class D section.

Lets look again over the IGBT discussion, now with new Hi-Speed IGBT´s on the market, I was wondering if someone is using IGBT's in a H-Bridge configuration for high Power Sub-woofer amplification or even has use successful for Full-range amplification.

I'm thinking IGBT's specific in Class D operation. The new IRGP20B60PD or IRGP35B60PD WARP2 devices from IR can handle switching up to 150khz. Having this devices in a full bridge operation would give massive output power.
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Old 13th August 2010, 12:20 AM   #5
Pafi is offline Pafi  Hungary
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It's simple, but quality is limited. I used IRGP50B60PD1 in full bridge (fsw=100 kHz, not for audio) some years ago, and I found its diode is not as fast as I needed.

But full bridge with more than 250 V power supply for audio? Why would you do it? That's more than 2500 W on 8 ohms! What would you use it for?
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Old 13th August 2010, 07:21 AM   #6
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IXGX60N60C2D1 are best in class for 100khz hard switching
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Old 13th August 2010, 10:19 AM   #7
celsosc is offline celsosc  Portugal
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Originally Posted by Pafi View Post
But full bridge with more than 250 V power supply for audio? Why would you do it? That's more than 2500 W on 8 ohms! What would you use it for?
Hello Pafi,
Pick up any modern PA Low-Driver and you see that they are power hungry.
And as the most expensive part of any PA-Amplifications is providing Power for the low end, I think it would be interesting to develop a cheap dedicated high Power Amp.
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Old 13th August 2010, 12:02 PM   #8
DjLeco is offline DjLeco  Romania
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Quote:
Originally Posted by Workhorse View Post
IXGX60N60C2D1 are best in class for 100khz hard switching
And HGTG30N60A4D, too!
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Old 13th August 2010, 02:10 PM   #9
Pafi is offline Pafi  Hungary
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Celsosc!

Quote:
Pick up any modern PA Low-Driver and you see that they are power hungry.
Is Eminence or JBL out of date? Please name one product you think about! Wherever I search I don't find a resonable speaker which needs this high voltage.
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Old 13th August 2010, 02:32 PM   #10
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2500W at 8 ohms is surely not needed for any single LF driver, max power handled by known PA LF transducer is 1000-1200W range and 1500W is max permissible for short brusts.

whereas 5000W @ 2ohms is very desirable from an amplifier and that needs rails less than 200V indeed.

Precision Devices International Limited
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