Other Parts Discussed in Thread: UCC21521, UCC28951, PMP20657
Hi,
I am in the paper designing stage to develop a 960W phase shifted full bridge with zvs using ucc28950. I am referring to app note SLUA560C for the same. A PFC pre-regulator precedes this power stage. The output is 24 ~ 28Vdc, 960W. I am thinking of designing the bridge with switching frequency of 140KHz.
Based on the schematic given on page 26 of the app note, I am seeking help for the following -
1. How to design the Shim inductor L2 and Output inductor L1 ? I would like to know the design equations and how to select the core size etc for the same.
2. Which core should I use for the current transformer T1 ?
3. I am thinking of using 2 x UCC21521 (isolated dual gate driver) to drive the bridge Mosfets (I am not very big fan of drive transformers !). Please advise if this selection is ok ? If not, what do you recommend ?
Regards,
Sanjay