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Class D Switching Power Amplifiers and Power D/A conversion

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Old 19th September 2013, 06:35 PM   #61
Acca is offline Acca  Serbia
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Quote:
Originally Posted by don2007ksa View Post
Hi Aleks,this is the waveform i measure on both out of Ka before 1N4148, 5 V/div. @ 5us,please check.
Waveforms is OK.
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Old 19th September 2013, 09:24 PM   #62
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Default d amp by Acca

With 1khz sine wave input signall,wave form measured at input pin of IR2184
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Old 20th September 2013, 10:16 AM   #63
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My waveform is same as your.This is ok now.Measure voltage at output,before filter.
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Old 20th September 2013, 06:15 PM   #64
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Hi aleks,the voltage before the coil is 20 to 60 mv,but after a couple of minutes the voltage goes to negative value (-100mv ) and continue to it's negative reading,i remember this senario on class A amplifier something like (thermal run-away)but my output FET'S is in normal temp,less than 40 deg,my frequency set to 160khz any solution?hope to hear more from you.thank's.
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Old 20th September 2013, 08:43 PM   #65
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Maybe your pot. have temp. drift?
Or input capacitor?
And what's purpose of many LED's?
What is that blue cap's on right?
Where's fet's,under board?

Last edited by Acca; 20th September 2013 at 08:46 PM.
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Old 20th September 2013, 09:24 PM   #66
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Default d amp by Acca

Green at the upper part is a 12V indicator,red lower right osc. indicator,red on lower left OCP,blue caps for snubber if ever needed, by the way Aleks please post a schematic with feedback, how can it be implemented on this circuit?thanks.
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Old 21st September 2013, 05:58 AM   #67
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I'll post later.........
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Old 28th September 2013, 03:35 AM   #68
kanon is offline kanon  Mexico
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Default good amp.

what do you think of this layout, it will arm how it works for me is the best of the best in the class d diy maplificadore..
theam translater no good..
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Old 28th September 2013, 04:09 AM   #69
kanon is offline kanon  Mexico
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Default good amp.

what do you think of this layout, it will arm how it works for me is the best of the best in the class d diy maplificadore..
theam translater no good..
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Old 28th September 2013, 08:47 AM   #70
Acca is offline Acca  Serbia
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See post #24 for sugestions....
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