Other Parts Discussed in Thread: UCC28950
Dear TI reference designers,
some time ago, TI bought National Semiconductor and with it, got the portfolio of National products. Unfortunately, several unique National Semi ICs like the LM and LME audio ICs, was discontinued by TI (i am missing the 200V LMExxxx, no equivalent in the TI portfolio). I am worry, the same may happen to the LM5046 phase shifted full bridge. The LM5046 integrates low- and hight-side driver up to 100V (perfect for 48V applications), next to the PSFB functionality. But in every new reference design/app note about phase shifted full bridge, TI uses there own PSFB IC like UCC28950, plus additional(external) low- and high-side mosfet driver and sometimes gate drive transformers. The UCCxxx controller alone cost more then a LM5046, and then external mosfet driver and gate drive transformers cost increase the cost even more. Same with the complexity of the board.
May i ask the TI reference designers, why you not use the LM5046 in your phase shifted full bridge designs? And instead design with a UCCxxxx plus external mosfet driver plus external gate transformer? Will the LM5046 soon be discontinued? Or is there a technical issue?
I have to design a 48V in PSFB converter (400W+), and for a low BOM count and cost, i would prefer the integrated LM5046 over, lets say, UCC28950 plus all the additional parts. But it is soon discontinued, i have to use a other part.
Thanks,
Michael
