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Class D Switching Power Amplifiers and Power D/A conversion

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Old 13th January 2012, 10:09 AM   #1591
fibko is offline fibko  Slovakia
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I used E20 core with winding 1:1 and induction was approximately 2mH without air gap. I used the default current protection.
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Old 15th January 2012, 11:52 AM   #1592
stewin is offline stewin  Kenya
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hi fibko just wondering does using the tansformer gate drive yield more power or has any advantage over using chips like ir2110 .?

is the overcurrent sense working perfectly? if it is working is there a need of adding protection in the amplifier?
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Old 15th January 2012, 12:28 PM   #1593
stewin is offline stewin  Kenya
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hi fibko just wondering does using the tansformer gate drive yield more power or has any advantage over using chips like ir2110 .?

is the overcurrent sense working perfectly? if it is working is there a need of adding protection in the amplifier?
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Old 16th January 2012, 05:02 PM   #1594
CPX is offline CPX  Romania
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Heloo to everybody and Happy New Year!

I'm back with new problems.Now i am using lt1016,the rest of the circuit is the same.I am getting more distorsions than with lm311.
Adding capacitance between in- and in+ decreases them(30-200pF) but this means i am using a faster comparator for nothing because it just decreases its speed.
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Old 17th January 2012, 12:33 PM   #1595
manojtm is offline manojtm  India
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Hi every one

I think change the gate resistor to 100 ohm for IRF250N and connect one more filter ( first filter 55uH and second one 30uH).Now the noise will out.
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Old 18th January 2012, 10:32 AM   #1596
akraj is offline akraj  Bangladesh
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Hello: This is Raj and I am new to this forum. I am also interested to make good Class D amp and searching for this I saw one of JBL LS120 subwoofer's schematic. They use class D which is simple and surely will produce good sound.

Schematic is available here: Keres? - Service Manual finder | ElektroTanya | Service manuals and repair tips for electronics experts

Any expert opinion about this?

Thanks
Raj
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Old 18th January 2012, 11:25 AM   #1597
CPX is offline CPX  Romania
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I can not find the manual.Please post the schematic directly.
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Old 19th January 2012, 03:31 AM   #1598
akraj is offline akraj  Bangladesh
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Hi CPX: The file size is just over 2mb, so cannot post here. I can mail to you if you share me your address.
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Old 19th January 2012, 04:13 AM   #1599
akraj is offline akraj  Bangladesh
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Please check the link, hope you can view:

https://www.cx.com/mycx/share/PYYgQ0...i_%5BET%5D.pdf

Thanks
Raj
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Old 19th January 2012, 08:38 AM   #1600
CPX is offline CPX  Romania
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Ok..i looked at it..but the basic schematic on this forum is much simplier...,also what you have will not work full range without modifications.
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