UCC28C42: IS it good solution for 240W DC-DC?

Hi,

I suggest to use LM5036 (half-bridge). UCC28C42 is a single ended controller and 240W is a bit high for single ended controller. But 240W is really in a blur area where a single-ended controller may still be ok although its power is a bit too high which asks a bigger transformer and parallel MOSFETs and lower frequency. 

Hi,

You need to add external MOSFET drivers. Also not using the on chip high voltage startup.

Alternatively, you can use push-pull topology, LM5036 is ok for push-pull, and in this case, the on-chip MOSFET drivers can be used. But for high voltage startup you still need to use external circuit (similar to UCC28C42 when you consider startup).

On push-pull, you may also consider UCC2808A but its MOSFET driver capability is 0.5A/1A for source and sink. You need to calculate to see if ok.