26W H-Bridge Class D Amplifier

D

Probably you should do two steps back and check your filter circuit first. Because of ringing you get only at 5kHz 150W. At 1khz its around 100times lower!

And think about P=U^2/R=20^2/8=400/8=50Watt! Its impossible to get higher than this 50Watt. Doesn't matter what class of amp or which MOSFETs you recommand. With AC its even below 25W! And plus some filter at its corner frequency again half the power 12.5W!

Here it goes again.The filters are specifically for 5Khz. I knew that when i was building the circuit. I wanted to get the purest wave (visually) without sacrificing gain so this is why I chose to neglect some features of a true class D amp. If I were to design a more broad frequency response filter it would affect the clarity and the gain of the wave. Keep in mind that this is only examplary and is most rudimentary. There are no fail safes included nor protection circuitry nor error correction circuitry an anti aliasing filter.A great deal of stuff come to mind that are missing but the primary functions are covered. Digitizing a signal and then restoring it while amplifying it efficiently. These are the primary functions of a Class D amplifier and i believe they are fullfilled The EXAMPLE only needs to contain primary functions plus EC hasn't got the workspace to build a complete class D amp with all of its extra circuitry.I will not argue with you about the basic principles of ADC and DAC. I'm sure you know them and see them present. Now do you get it why it's this way or I need to explaon again? Lol o.O

If your headline would be "LC Resonator principe 5kHz" then i would agree. Tell us how do you get 150W with 20V out of 8Ohm??? Answer, with a resonator. But not with a working Class D amplifier. LOL

A resonator yes but what drives it? PWM which is distinctive to class D amps.

Yes, but what you as noob probably now see is that your PWM frequency is much to low to get a good filter result. With 50kHz PWM and a 2. order LC filter a Class D amp would look bad. So as i said go two steps back and start with a filter design before giving advise which IRFxxxx MOSFETs to use. Noob.

You must be quite arrogant to call ME a noob and finding flaws in MY circuits seeing as how EC is full of noobs with non working circuits. I think you pick on me because you know i am not thw noob you say. Plus i chose 50Khz because According to the kotelnikov thorem the sampling frequency must be twice as high as the highest frequency. That means 2x20=40khz _[_

At least twice as high, correct.

Well it's 50Khz that's more than twice as high. No need for oversampling. It may cause different errors which I don't have the workspace to correct. Just as I said as basic as possible. Just the primary functions are important.