Questions about Class-D output stage

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saad

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1. while calculating power dissipation by parasitic capacitances in output stage of class-d amplifier..do i need to consider capacitace of lowpass LC filter..

if yes why..if not why not??

2. what could be typical Ron values for 4Ω speaker load?



regards,
saad
 

Can you post some drawing to help the helper?
 

q1:
LC loss will reduce power eff , but you are sure your L,C model is correct ? how about optimize your output stage loss at the assumption that
LC filter and 4ohm load is ideal ?

q2:
usu,Ron,p+Ron,n=0.5 ohm or a little more in BTL 8 ohm load design
try to see more provider datasheet,
 

Recently i also design the class d op amp and have some questions to solve.
Thanks
 

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