I Have a tpa3255 implementation that has problems with OC shutdown or possibly OT. The OC programming resistor is 22k and the heatsink has good contact with the ic, yet I get a latched shutdown situation when output current rises over aproximately 2A. OC and OT shutdown are the only types of shutdown that needs reset for the amp to restart so it is one or the other, Does not seem to be affected by ambient temp so I very much suspect Over Current and not Over Temp. Load is 4 Ohm speaker, verified to be actual 4 Ohms. The amp has two tpa3255's on the same board, sharing the same heatsink. One chip is configured to run btl and the other is pbtl. I can get all channels to shut down way before output current is anywhere near the set OC limit by the 22k resistor.
Where should I start looking? I am starting to suspect the output filtering, which could possibly cause a real OC situation that is not picked up when mesuring after the filter as I have done
