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Class D Switching Power Amplifiers and Power D/A conversion

Philips UCD application note
Philips UCD application note
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Old 28th August 2012, 07:17 PM   #491
stewin is offline stewin  Kenya
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Join Date: Jul 2007
thanks sweet perfume. pls post the thread no . i wanted to drop the speed to 250khz so as to use 4pairs of irfp250n.

i love this amp too than ir21110 .
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Old 28th August 2012, 07:40 PM   #492
stewin is offline stewin  Kenya
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Quote:
Originally Posted by sweetperfume View Post
Place a diffrentrial resistor in place of R9....it sets freq and dead time u need to set that for every mosfet if u change......i had posted a new thread after finishing with this thing....take a look at it..u can see I had cut a resistor below...i placed a potentiometer instead....but I can say its simple and awesome......with higher voltage....it is better than Ir2110

btw did you mean r9 which is 220ohms in the below schema?
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Old 29th August 2012, 03:30 PM   #493
sweetperfume is offline sweetperfume  India
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Quote:
Originally Posted by stewin View Post
btw did you mean r9 which is 220ohms in the below schema?
Sorry stewin.....its not that resistor I was talking about....i thought this design must be the original one which philips used....in this design you can se there is a differential resistor R36...it sets dead time and frequency....but when response is clear there is still some prob...output is never the same...when I got sine wave the output freq was more than 1khz... But response was good....
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Old 13th August 2013, 03:17 PM   #494
Soundblaster is offline Soundblaster  United States
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Join Date: May 2006
Default Philips Other UCD application

I see a lot of comments regarding the discreet version of a uCD amplifier. Y'all should check out the VAMP600 amplifier that used an integrated power comparator and power stage.

This amplifier works as-is, is stable, and remarkable in its presentation.
I have gerber files, BOM's etc. if anyone is interested. What's too bad is the Silicon is long since discontinued. Probably available in distribution though.
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Old 13th August 2013, 08:50 PM   #495
tom42107 is offline tom42107  United States
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Join Date: Feb 2010
Soundblaster, I would love some info on the VAMP600. Thanks.

tom@stellarvisions.net
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