Part Number: UC3855A Other Parts Discussed in Thread: UC3855B , , UCC28180 Hi Team,
We have received an inquiry from a customer if the UC3855A and UC3855B can operate at 400Hz AC line. If not, can you please suggest one that can operate at this frequency…
Part Number: UC3855A Hi,
Below is a snapshot from UC3855 document SLUA146A. Why diode D2-Anode is connected to diode D3 anode. Can I connect to D2-Anode to D3-Cathode( or rather Qzvt-drain). This will minimize switching loop between Qzvt and D2, thus…
Other Parts Discussed in Thread: UCC28180 , UCD3138 Hi Team,
We are looking for a PFC pre-regulator for a 750W application. We will be using a 115VAC input and ~190VDC output.
I have identified the UC3855A as a potential solution. I was wondering…
Other Parts Discussed in Thread: UC2854 , UC2854A , UC3855A , UCC3817 , UC3854 , UC3854A CAn any one know the derivation for control loop design transfer function fot PFC controller IC given in Texas UCx854 PFC controller Design , Please Reply fast
Craig,
The voltage band width is probably a little higher than 10 Hz. Use the app note for the UC3855A section 4.7.3 to determine the phase margin and crossover point.
http://www.ti.com/general/docs/lit/getliterature.tsp?literatureNumber=slua146a&fileType…
