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
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…
Hi Armela,
The negative zener clamp method you cited from section 7.3.1.3 is illustrated in this reference design schematic: http://www.ti.com/lit/df/slurax2/slurax2.pdf which was done for a project using the UCC28720 PSR BJT-controller, however the concept…
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…