LM1875 ltspice model

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May this can help you: Laplace expression for small-signal can be used to investigate feedback and stability of the LM1875.

The expression that I use in a Laplace block in SIMetrix (evaluation version is sufficient) is:
73000000/(s+2500)/(1e-7*s+1)/(2e-8*s+1)

This is of course a very rough simplification. The Boucherot compensation for inductive output compensation can NOT be investigated with this simple model.

FS
 
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