Hi Che,
Yes, there are the 3 reference designs I mentioned earlier (see my reply of Jan 02, above), each with efficiency data.
Plus, there are 2 EVMs, one using GaN FETs and one using Si FETs:
www.ti.com/.../UCC28780EVM-002
www.ti.com/.../UCC28780EVM…
Part Number: UCC28780EVM-002 Other Parts Discussed in Thread: UCC28780 , , UCC28780EVM-021 Hello,
I have EVM of UCC28780 with Silicon MOSFETs. Initially it was working fine. But suddenly there is no output Voltage and output current.
I am also facing exactly…
Ulrich-san,
No.
Many customers network standby load is 1.6W.
So Flyback cct. must clear 80% AC to DC efficiency at 1.6W DC load.
I have measured UCC28780EVM-021 with high accuracy power meter, the result is under 80% at 1.6W DC load.
You have to understand…
UCC28780 device itself frequency limit is 1MHz.
UCC28780 converter fsw is variable depending on line and load. A better switching frequency,fsw, estimation for a converter can be done on MathCAD design file, that can be downloaded from www.ti.com/..…
Hi Ulrich,
I have simulated out 5V output, with 6A load. I changed RVS2 form 12.7k ==> 8.5k. I tried the inductor value to achieve the desired transient. How can I achieve transient like your circuit (UCC28780EVM-021) ?. For example, optimize resistance…
