I would like to design a GaN converter with an output current of 150A. The output is regulated in current (not in voltage). If I am able to increase the frequency, I am able to reduce the size of the transformer without saturating it. Nevertheless I will probably be limited not by the saturation but by the losses into the transformer depending on the material. In any case my problem is not this one. If I want to have 150A at the output, it means that I need a huge cable or PCB trace for passing this current, and I will have the same problem at the primary depending on the number of turns... And it seems that I will not be able to actually reduce significatively the size of the transformer. Did I do a mistake ?

The solution that I can see is probably paralleling 2 converter to have 75A. But the cost will not be the same ...

Do you think that there is a better solution than what I think ?

Have a nice day ?

  • 1
    \$\begingroup\$ It is not unreasonable to have two or more converters paralleled and might actually be cheaper. You just have to crunch the numbers and see what comes out. \$\endgroup\$
    – Kartman
    Dec 28 '21 at 11:14
  • \$\begingroup\$ What is output voltage? \$\endgroup\$
    – bobflux
    Dec 28 '21 at 13:09
  • \$\begingroup\$ The output voltage depends on the current but it may be 20V \$\endgroup\$
    – Jess
    Dec 28 '21 at 13:13
  • \$\begingroup\$ You can also use bus bars tied to the PCB \$\endgroup\$
    – Voltage Spike
    Dec 28 '21 at 15:38
  • 1
    \$\begingroup\$ Use fine, high-purity, copper tubing with internal water cooling? At high frequencies, the center of the conductor has little current flowing, anyway. \$\endgroup\$ Dec 28 '21 at 20:55

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