The speaker spice model in the class d amp design

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chang830

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speaker spice model

Hi,
We are developing a class d audio amplifier whivh is used in the PDA or GSM mobile phones. The amplifier is filterless, i.e. the amplifier is driving the speaker load directly. I wonder, in the designing phase, how should i model the speaker load? A simple inductor seried with parallel connected Cap and Rload is enough for the design? If so, what is the value of the inductor and cap?

Thanks
 

spice speaker model

I think, for equivalent load of speaker, it conmbines serial R, L, and emf, should no Cap.
 

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    chang830

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speaker pspice

peterwangyu said:
I think, for equivalent load of speaker, it conmbines serial R, L, and emf, should no Cap.
Click to expand...

hello,peterwangyu,
Thanks for the reply. Would you pls. explain what "emf" stands for?
 

pspice speaker


emf = electro magnetic force.

Loudspeakers can be quite complex ie. not only driver and filter electrical, parameters, is also cabinets parameters influence how louspeaker sems from amplifier side.

if you look around on internet, you can find some spice-models of loadspeakers

(search in my HD)


one i find



not so simple LCR-circurit...


and other:

https://www.duncanamps.com/spicels.html
 

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    chang830

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