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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 2nd January 2011, 10:55 AM   #801
Dzony988 is offline Dzony988  Serbia
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Happy new year to all!
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Old 2nd January 2011, 03:12 PM   #802
stewin is offline stewin  Kenya
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happy new year guyz and a prosperous 2008
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Old 2nd January 2011, 03:27 PM   #803
ionutzxpo is offline ionutzxpo  Romania
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Happy new year!!
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Old 4th January 2011, 07:18 AM   #804
stewin is offline stewin  Kenya
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happy new year guyz and a prosperous 2008
happy new year guyz and a prosperous 2011
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Old 8th January 2011, 03:58 PM   #805
Dzony988 is offline Dzony988  Serbia
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Hi to all..

Do anyone have schematic of some simple smps +-50-60V 400-600W, i need for this amplifier

tnx
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Old 8th January 2011, 08:42 PM   #806
NMOS is offline NMOS  Germany
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Originally Posted by Dzony988 View Post
Hi to all..

Do anyone have schematic of some simple smps +-50-60V 400-600W, i need for this amplifier

tnx

better use transformer, because you will dont have power supply pumping problems and dont need overvoltage protection
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Old 8th January 2011, 08:42 PM   #807
NMOS is offline NMOS  Germany
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Does someboday have short circuit protection for this amp ?
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Old 8th January 2011, 08:57 PM   #808
lorylaci is offline lorylaci  Hungary
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Quote:
Originally Posted by NMOS View Post
better use transformer, because you will dont have power supply pumping problems and dont need overvoltage protection
If you use enough caps, then you wont have pumping problems.
You can calculate sufficient capacitor values with: deltaU=Ubus/(8*Pi*f*Rload*Cbus)

The music power content under 70Hz is rapidly decreasing. Few kick drums are tuned/miked/eqd to sound under 70Hz, and bass guitar pickups dont get the first harmonic... so unless you design a sub amp for home cinema, and use sufficient caps (caps still cheap) supply bus pumping is not an issue.
Simple short circuit prot can be achieved by putting a shunt in and using a opto-coupler to supply Vn+12V to SD pin of IR2110, but the shunt dissipation will be higher than the main FETs dissipation, so this usual shunt method for Class B should not be used, unless you dont care about this small dissipation.
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Old 9th January 2011, 12:10 AM   #809
Dzony988 is offline Dzony988  Serbia
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No, I dont really care for this small disipation... do you have this schematic with sd pin, which has been verified, on example for +-60V for 350-400W on 4 ohm load

Thank you
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Old 9th January 2011, 02:10 AM   #810
NMOS is offline NMOS  Germany
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Quote:
Originally Posted by lorylaci View Post
If you use enough caps, then you wont have pumping problems.
You can calculate sufficient capacitor values with: deltaU=Ubus/(8*Pi*f*Rload*Cbus)

The music power content under 70Hz is rapidly decreasing. Few kick drums are tuned/miked/eqd to sound under 70Hz, and bass guitar pickups dont get the first harmonic... so unless you design a sub amp for home cinema, and use sufficient caps (caps still cheap) supply bus pumping is not an issue.
Simple short circuit prot can be achieved by putting a shunt in and using a opto-coupler to supply Vn+12V to SD pin of IR2110, but the shunt dissipation will be higher than the main FETs dissipation, so this usual shunt method for Class B should not be used, unless you dont care about this small dissipation.

so please can you offer schematic for SD-Pin with IR 2110
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