Hello Aravind,
Your calculation for Rff and Cff should follow the design method in the UCC2818A-Q1 datasheet. I'm not sure how design a 2-pole VFF filter on this device.
Your simulation is of a voltage source driving a series R-C filter. It is not…
Part Number: UCC2818A Other Parts Discussed in Thread: UCC2818 Tool/software: Hello guys,
One of my customers is evaluating UCC2818A for their new products.
At this moment, they have the following questions. Could you please give me your reply?
Q1. The…
Part Number: UCC2818A-Q1 Hello Team,
We require clarification in one of the datasheet parameters of UCC2818A-Q1 PFC Controller IC.
In the below image, the datasheet talks about power limit (IMOUTxVFF).
Can we know what exactly the parameter describes…
Part Number: UCC2818A Hi,
I have a question about startup behavior. Because the output voltage is rising rapidly, the output voltage has reached the specified value (380 V) before the end of soft start. I suspect that this is because the duty at startup…
Part Number: UCC2818A Hi,
Is there a tool (Excel) that calculates the setting values of peripheral components and devices when I input the input/output voltage and output current set as specifications?
Also, are there any design documents other than those…
Part Number: UCC2818A-Q1 Other Parts Discussed in Thread: UCC2818A , UCC2818 Hi again,
I tried to supply the IC with a solution similar to the one at pag.11 of the UCC2818A-Q1 datasheet: startup resistors + auxiliary winding on the boost inductor.
The…
Part Number: UCC2818A-Q1 1. How can we shut down the PFC or derate the PFC through microcontroller in case of Temperature of MOSFET going High?
2. How can we shut down the PFC or derate the PFC through microcontroller in case of Input Voltage dropping…
Part Number: UCC2818A-Q1 Other Parts Discussed in Thread: UCC2818
This is a block diagram of a CCM PFC. I want to understand the role of the feedforward constant block here.
This is the functional block diagram of UCC2818A-Q1. Can anyone explain how…
Part Number: UCC2818A-Q1 Hello,
I made a boost rectifier with UCC2818A-Q1, Vout 385V, 1kW.
Actually the IC is supplied with 12V from the external but I would like to supply it from mains as in the datasheet Figure 1 (pag.11).
I tried to made some auxiliary…