On-board Distributed Power

[bryanurbe]

Greetings All,

Hope this post finds everyone well. So here is my question:

I've designed a 3kW full-bridge soft-switched (fs =20kHz) using two monolithic high-voltage IC’s for the gate drivers (please see attached datasheet View attachment Half-Bridage Gate Driver IC - FA_FAN7392.pdf). This is my first design of something this practical so up till now I've invested all my effort on the design of the power stage and gate-drivers; accordingly, at the moment I’m using 3 separate power supplies in my set-up: 1) one for my Vdd , 2) one for Vcc, one for my DC-link. For my DC-link power I’m using a simple rectifier and LC filter, for my Vdd and Vss I’m using separate isolated SMPS’s. Now that I have things on the power stage working I’d like to refine things a bit. That being said, I’d like to have on-board power for Vdd and Vss. What would be the simplest and/or best approach to achieving my desired goal?

Thanks in advance for any assistance.

Bryan

 

[goldsmith]

Now that I have things on the power stage working I’d like to refine things a bit. That being said, I’d like to have on-board power for Vdd and Vss. What would be the simplest and/or best approach to achieving my desired goal?

Hi Bryan
it is simple ! try to use an auxiliary winding and then a supply with low power handling for transient time after transient time the auxiliary wind will supply it .
Best Wishes
Goldsmith