[SSassen]

Alright, I've been simulating with LTspice again this afternoon and I thought why not take the concept of my full-bridge UcD TDA8939 design and apply that to my half-bridge UcD that uses the IR2011 MOSFET driver and see how far I can push it?

Below you see the result of a few hours of work with LTspice: over 1KW of output at 4-ohm with just 0.5% THD, not bad at all if I may say so myself. I think I'm the first to show working simulation data of a 1KW amplifier on our forum, so I'm expecting a pad on the back from Rummy and a promotion from Beobachter to 'D-AMP HiFi forum's best class-D designer' or something.

As always, feel free to shoot holes into the design, if you can, but I think all that it needs is building to verify that it actually works. Obviously more output is possible by raising the voltage and chosing different MOSFETS (>200V >23A).

1KW class-D UcD full-bridge



1KW class-D UcD full-bridge THD

Fourier components of V(out+)
DC component:0.160293

Harmonic Frequency Fourier Normalized Phase Normalized
Number [Hz] Component Component [degree] Phase [deg]
1 1.000e+04 4.458e+01 1.000e+00 20.41° 0.00°
2 2.000e+04 8.127e-03 1.823e-04 -11.38° -31.79°
3 3.000e+04 2.189e-01 4.910e-03 153.78° 133.37°
4 4.000e+04 1.270e-03 2.849e-05 -117.52° -137.93°
5 5.000e+04 7.805e-02 1.751e-03 53.97° 33.56°
6 6.000e+04 3.059e-03 6.863e-05 119.76° 99.35°
7 7.000e+04 3.029e-02 6.795e-04 -50.58° -70.99°
8 8.000e+04 1.071e-03 2.402e-05 101.53° 81.12°
9 9.000e+04 9.968e-03 2.236e-04 145.34° 124.92°
Total Harmonic Distortion: 0.526531%

Date: Thu Dec 01 20:29:45 2005
Total elapsed time: 197.844 seconds.

Best regards,

Sander Sassen
Hardware Analysis

[MrWeb]

Dear Ssassen,

at the first sorry for my bad english.
It is possible, to get the asc file of this amp ?

I want to play a little with your design and the ir2011 driver.

Best regards and goog new year 2007

Torsten
Alias MrWeb

[sixtas]

Hi Sassen,

wenn Du asc.file und Modell/2011 einstellst,versuche ich zu schießen.

Mike