Opamp for Vref on TDA1543, TDA1545A

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Looking for info, comments, or even schematics (topologies) on generating a clean Vref -- via a dedicated opamp --for TDA1543 and TDA1545 (and preferably the latter).

Informally, I've heard (read) some DIYers mention this strategy, but I'm not sure if it has been formally discussed in a forum, at least via my non-exhaustive archive searches -- please correct me if I'm wrong!
Thx
 
Ooops! Iref (TDA1545A) vs Vref (TDA1543)

I just noticed a potentially huge oversight on my part (shame on me!)...
TDA1545A (pin 7): Iref (not Vref)
TDA1543A (pin 7): Vref
This may change the relevance of the thread query.
 
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