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Class D Switching Power Amplifiers and Power D/A conversion

ucd 25 watts to 1200 watts using 2 mosfets
ucd 25 watts to 1200 watts using 2 mosfets
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Old 9th August 2012, 04:23 PM   #2201
stewin is offline stewin  Kenya
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Quote:
Originally Posted by CPX View Post
Heating is due to deadtime form and effective delay,i do not think the amplifier in itself has a problem.
does dead time vary with voltage ? as in the more high voltage you use the more you have to adjust dead time.? and how cn one adjust ??
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Old 10th August 2012, 04:35 AM   #2202
de Ocampo is offline de Ocampo  Philippines
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Quote:
Originally Posted by thienchay View Post
Thanks , you can show me that . Maybe i have some mistake
Regards
Thienchay,

Do yuo also have DIY files for the 12v bias regulator of IRS900D?...

thanks!
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Old 10th August 2012, 05:50 AM   #2203
thienchay is offline thienchay  Viet Nam
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Quote:
Originally Posted by abeteer View Post
Thienchay,

Do yuo also have DIY files for the 12v bias regulator of IRS900D?...

thanks!
Yeah , i used LM317 for 1 Channel .
This my Layout and PDF file
Regards
Attached Images
File Type: jpg LM317 Regulator.jpg (94.8 KB, 2173 views)
Attached Files
File Type: pdf IRS-2000D 2 with LM317 regulator _ PCB.pdf (90.1 KB, 934 views)
File Type: pdf IRS-2000D 2 with LM317 regulator _ Overlay.pdf (112.0 KB, 885 views)
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Old 10th August 2012, 05:57 AM   #2204
andrewlebon is offline andrewlebon  India
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Default 12v bias regulator 2.5ampere

good regulator
warm regards
andrew lebon
__________________
"It's Better to try and fail than to never know and always wonder"
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Old 10th August 2012, 08:24 AM   #2205
de Ocampo is offline de Ocampo  Philippines
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Thienchay,
Do you have the schematic? what was the appropriate values of R1 & R2?..

Andrew,
Can you post the construction details for 100uh inductor?


Thank you guys!
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Old 10th August 2012, 11:55 AM   #2206
thienchay is offline thienchay  Viet Nam
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Quote:
Originally Posted by abeteer View Post
Thienchay,
Do you have the schematic? what was the appropriate values of R1 & R2?..

Andrew,
Can you post the construction details for 100uh inductor?


Thank you guys!
You can see all Information of LM317 in datasheet , Vout = Vref (1 + R1 / R2) + I adj R2 .

You can calculate in this site : LM317 / LM338 / LM350 Voltage and Current Regulator Calculators
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Old 10th August 2012, 12:50 PM   #2207
sweetperfume is offline sweetperfume  India
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Thienchay,
your design gives positive 12v or 12v ref to negative supply rail.....


warm regards,,,,,
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Old 10th August 2012, 03:42 PM   #2208
manojtm is offline manojtm  India
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Hi All

LM317 can handle only 1.5A Max. Use LM350 for 2A if you need only 1A use LM7812(700mA -- 1A Max with heat-sink) its for single IRFP250 no problem my circuit work 90V supply i use 12V regulator 7812
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Old 10th August 2012, 03:54 PM   #2209
thienchay is offline thienchay  Viet Nam
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Quote:
Originally Posted by sweetperfume View Post
Thienchay,
your design gives positive 12v or 12v ref to negative supply rail.....


warm regards,,,,,
Hi
+ (12V) on Regulator Board connect to +12V on Power board
.... and - (GND) on Regulator Board connect to COM (V-) on Power Board .
GND of Regulator must be connect to V- on Power Board .
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Old 10th August 2012, 04:01 PM   #2210
thienchay is offline thienchay  Viet Nam
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...
like this
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