I am designing a 3-phase three-level NPC converter (same type as: https://trinhquocnam.files.wordpress.com/2015/12/t-npc.png?w=767&h=434).
The box this converter will be placed into is fed with 48V (for the control signals). I would like to take this 48V, step it down to 12V (with a DC-DC converter, probably), and power all 12 of the gate drivers that are necessary for this 3-phase setup.
Currently, our design uses 12 dedicated DC-DC converters, but they are pricey ($35/piece) and this solution doesn't seem "clean" to me.
Is there a way to take this 48V, step it down (preferably only once), and send it to all of the gate drivers? I was thinking using pulse transformers may work, but I would like to see the opinions here.
Thanks a lot!