+18V Isolated Power Supply for High Side MOSFETs

Thread Starter

Firenze02

Joined Sep 1, 2018
40
Hi,

I'm designing a full brige inverter. I'm using SiC MOSFETs with VGS=+18V.
As you know, the supply of driver upper MOSFETs has to be isoltated but actually I have not find an isolated DC-DC converter able to ensure VGS=+18v, Isink=Isource=10A (max).

What do you usually do for this application? Do you know some ICs that can be usefull?

Thank You in advice.
 

Bordodynov

Joined May 20, 2015
2,642
You do not need a converter with a constant output current of 10A. Enough to have a low-power converter and its output shunt capacitance ceramic, with the value of about 50 - 100 times greater than the input capacitance of the switching transistor.
 
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