At a glance I’d say no.
With that circuit as the audio input signal goes positive the pulse width of both output mosfets increase. Negative going signal makes pulse width of both decrease. What you want for audio is for one mosfet to increase pulse width and at the same the other decrease and vice versa.
With that circuit as the audio input signal goes positive the pulse width of both output mosfets increase. Negative going signal makes pulse width of both decrease. What you want for audio is for one mosfet to increase pulse width and at the same the other decrease and vice versa.
Oh, sorry! I made a mistake. In your first post I didn’t see that the two outputs from the pwm chip are one from the collector and the other from the emitter so are opposite phase. Yes it might work. Give it a try. I think a problem though will be with a TL494 each output can only go to 50% duty cycle max. Is better for it to be able to go to 100% when the other side goes down to zero.
Hi
I test this circuit .. results are blow
Ch2 low side
Rise time 90.00ns
Fall time 70.00ns
+Width 2.050us
-width 2.130us
+Duty 49.0%
-duty 51.0%
Frequency 239.2khz
Period 4.180us
Mean 4.740v
Pk-pk 10.80v
Cycle 6.911v
Vmax 10.40v
Vmin -400.0mv
Vtop 10.40v
Vbase 0.000v
Vamp 10.40v
Overshoot 0.0%
Preshoot 3.8%
Ch1 high side
Rise time 130.0ns
Fall time 50.00ns
+Width 2.060us
-width 2.130us
+Duty 49.3%
-duty 50.7%
Frequency 239.3khz
Period 4.181us
Mean 13.23v
Pk-pk 11.6v
Cyc rms 14.27v
Vmax 18.80v
Vmin 7.20v
Vtop 18.40v
Vbase 7.70v
Vamp 10.80v
Overshoot 3.7%
Preshoot 3.7%
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