What is the minimum output voltage when we use buck configuration in TEA1721? Is 5V possible at output?
I have asked our product group to comment on this, here is their answer:
In the simple buck converter configuration the output voltage of the buck converter is being used to supply the VCC of the TEA172x IC. Because the TEA172x IC does not run off 5V, it is not possible to produce 5V output voltage with the simple buck topology. The converter will need to produce 10V at least and generally we do not recommend to go below 12V.
If you can provide the VCC to the IC in a different manner, it would be possible to make a buck converter that produces 5V. However the topology will be much more complicated and chances are that the solution is no longer economically feasible. Of course, there will be circumstances that this could still be an interesting option, but that generally depends on the rest of the application.
I hope it helps. If you have any further questions, please let us know.
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