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
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…
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 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…
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…
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…
