UcD Tanaka Bridge LTspice simulation

[steph_tsf]

Hello, I had great fun transforming the Sansui-Tanaka Full Balanced Bridge into a Class D UcD amp. Can somebody check the waveforms ?

 

[steph_tsf]

As suggested by Tekko in the "UcD Philips UM10155 LTspice simulation" thread, I played with the value of R9 (R109 and R209 here) for controlling the deadtime.

Here are the results:

R109 and R 209 (ohm)...Spikes.............................THD at 5kHz (%)
340............................Twice the AVG current........0.048
360............................Same as the AVG current.....0.042
380............................Acceptable......................0.092
400............................Barely noticeable...............0.092
420............................Past barely noticeable........0.152

See attached pictures and .zip

Thanks Tekko!

 

[Akillion]

Hello, I wonder if you ever builded this design and/or if you have any suggestion for the 3mA biasing?

Best regards

 

[Akillion]

This circuit seems appropiate according to simulation, to"replace the 3mA current source".