There have been some recent posts on these chips. Apparently the uPC has a few different versions, most of which are obsolete or will be soon. One post mentioned that of the 4 NTE's he got from China, 3 were bad. I wouldn't mind using the NTE but it only goes to a 60 VDC rail and I need to go to at least 80 and preferably 100VDC.
At the moment I'm playing with a variation of the common discreet circuits. Most of them have some kind of a detection circuit based around a couple transistors or a bridge rectifier that drives a couple transistors. I'd like to use a chip rather than a bunch of discreets as board space is very limited.
So I wonder, what chip is in common use these days? Certainly all of the surround receivers use something that is current.
At the moment I'm playing with a variation of the common discreet circuits. Most of them have some kind of a detection circuit based around a couple transistors or a bridge rectifier that drives a couple transistors. I'd like to use a chip rather than a bunch of discreets as board space is very limited.
So I wonder, what chip is in common use these days? Certainly all of the surround receivers use something that is current.