800V DC input? You will need to use high voltage rating input capacitor. Also, the duty cycle is so low so the efficiency will be poor. Using a Flyback like PMP8678 will be more efficient.
https://www.ti.com/tool/PMP8678
Part Number: UCC28742 Other Parts Discussed in Thread: UCC28720 , PMP8678 The VS pin absolute maximum rating on the datasheet is listed for -0.75V to 7V. Is this rating valid during all operation or only at end of each switching cycle, disregarding beginning…
Jean,
I think you will be better off using a BJT device.I recommend some changes to your design. The baseline design you are using is probably not the best choice for this. I would recommend that you look at PMP8678. In the referenced design, it is a 300VDC…
Hi Ryan,
Thank you for your reply. Isolation is an important requirement so I would have to go for another winding. However, PMP8678 is very close to my specifications.
I saw that when the maximum current is reached the converter behaves as a current…
Hello,
The following two links will bring you to an application review of a 2 kW power supply using the UCC28950 that is parallel-able.
There is a more in depth application note that reviews a 600W PSFB design that you may find helpful as well, for designing…
Hello,
The UCC28600 was designed for high power fly back applications. I am not sure it is the correct device for this application.
You might consider using a PSR fly back using the UCC28722 that uses a BJT.
The following link will bring to the data…