LT1248 IAC pin not regulated to 2v

Status
Not open for further replies.
This is the pin that "tells" the LT1248 where on the mains cycle we are.
So that the controller can adjust the current to get i in phase with v.
Its supposed to regulate to 2V, and then the LT1248 reads the current into the IAC pin (more current, higher mains instantaneous voltage must be).
But on the LTspice model, its nowhere near 2v.

IAC pin just has a resistor into it from the post rectifier bus positive.
 
I don't think it's actually supposed to regulate itself to 2V. I think the data sheet is saying that the pin will be at 2V when there is no current into it. So that would be when DC+ is also at 2 volts. But, yeah, it's not clear.
 
Status
Not open for further replies.
Cookies are required to use this site. You must accept them to continue using the site. Learn more…