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TDA7491HV getting very hot?

Martin Rowe
Associate
Posted on May 15, 2017 at 09:10

I am having problems, with a TDA7491HV design (taken directly from the

http://www.st.com/resource/en/datasheet/tda7491hv.pdf

- Figure 50) and although it is working, the output inductors are getting very hot. Hot means ~85C with an ambient temp of 15C.

I have read elsewhere on this forum that

https://community.st.com/message/155712-re-tda4791lp-no-output-solved?commentID=155712#comment-155712

has use (with success) a 'filterless' output stage with the TDA7491LP.

Does anyone know if this approach is feasible for the TDA7491HV? There is no equivalent to

http://www.st.com/resource/en/datasheet/tda7491lp.pdf

in the TDA7491HV datasheet.

Best regards, Martin

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