Hello expert,
I am in charge of investigating the causes of trouble with TPA2013.
We use TPA2013(RGP) as an audio PA in our wireless radio product. The trouble is beep (key touch tone) at ful volume could result in breakdown (functional suspension) of TPA2013 due to circuit protection, which recovers after reboot. It does never happen at lower volume. It does not occur in all the products and not always occur. But once the trouble occurs, the product seemingly become so fragile as to frequently cause the trouble, and finally TPA2013 is fatally damaged and broken.
Please have a look at the scheme. R6 in the scheme is the variable register. We do not use the boost converter part of TPA2013. I suspect VccFB pin (#2) can be left open even if the boost converter is disabled. Could you help me to find any other problems with our scheme?
Thank you for your cooperation in advance.
Ryoji