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Class D Switching Power Amplifiers and Power D/A conversion

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Old 8th August 2012, 12:32 PM   #2191
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does that design works with cd4049 perfectly with given rate of output
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Old 8th August 2012, 12:37 PM   #2192
manojtm is offline manojtm  India
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Hi thienchay,

you are not connected a diode from junction to -VE rail it is must for class d amp

Your PCB is look good

Regards
MANOJ
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Old 8th August 2012, 03:01 PM   #2193
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Quote:
Originally Posted by stewin View Post
are you sure it will work with that voltage?? what fets are you planning to use??
That information from Detex .
I 'll used IRFP460 .
regards
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Old 8th August 2012, 03:12 PM   #2194
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At what rail voltage will give 1000w into 8ohm's ?
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Old 8th August 2012, 03:15 PM   #2195
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Quote:
Originally Posted by manojtm View Post
Hi thienchay,

you are not connected a diode from junction to -VE rail it is must for class d amp

Your PCB is look good

Regards
MANOJ
Thanks , you can show me that . Maybe i have some mistake
Regards
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Old 8th August 2012, 03:18 PM   #2196
paskal9 is offline paskal9  Malaysia
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Quote:
Originally Posted by red_zone003 View Post
At what rail voltage will give 1000w into 8ohm's ?
at 130v if you could swing it rail to rail and without any lack of current will give you 1056w into 8 ohm.

i do think it's better to bridge the 8 ohm if you're looking for that much power. 63v rail into 8 ohm bridged will yield 992w.
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Old 8th August 2012, 04:27 PM   #2197
stewin is offline stewin  Kenya
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Quote:
Originally Posted by paskal9 View Post
at 130v if you could swing it rail to rail and without any lack of current will give you 1056w into 8 ohm.

i do think it's better to bridge the 8 ohm if you're looking for that much power. 63v rail into 8 ohm bridged will yield 992w.
by the way thienchay will you bridge the amp at that high voltage +/-130vlts.
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Old 8th August 2012, 06:41 PM   #2198
stewin is offline stewin  Kenya
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guys i have decided to go back to basics fully discreet .i liked this amp but the only set back was it never handled well high voltage the outputs were heating . but if i have to bridge at low voltage like +/-55vlts i prefer this amp to the others here are my layouts . i have ordered smd resistors but before they arrive here is what i am up to. i will post components and bom later. have fun
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Old 9th August 2012, 12:35 AM   #2199
CPX is offline CPX  Romania
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Heating is due to deadtime form and effective delay,i do not think the amplifier in itself has a problem.
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Old 9th August 2012, 12:53 PM   #2200
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Click the image to open in full size.
has anyone built this amp with success
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