I'm working on this car audio power amp. I'd like to at least get the power supply section working (that way I can build my own amp using this PS, or replace all the blown output transistors).
Anyhow, there are 3 MOSFETs per side FZ46N that make up the positive and negative supply rails. Right beside it is a transistor made by ON marked U1620R on one side of the power supply, and U1620 on the other.
They haven't failed, but I can't get any data on what these are. I'm assuming they are a FET of some sort, I'd like to replace them as a precaution.
Does anyone know the website for ON transistors?? I tried google without much luck, and I remember going to their website once.