Other Parts Discussed in Thread: ISO7721, ISO7741
HI, we are working on a inverter design with the LMG3522R030-Q1 to be used with Li-on batteries. We have made a rough board with just the H-bridge to test the GAN-FET devices out but we are running into problems when running the inverter. On very extremely low frequencies it seems to work ok, the GAN-FETs can give out the 400VDC we input. But as we start the switching with the desired frequency to generate the VAC the circuit breaks down and both the digital isolators and the GAN-FETs break.
Pherhaps we have made some mistake with the grounding/isolation but I can not for the life of me find the issue. I have attached the schematic and I have gerber files as well if you want. I would really appreciate some assitance here, thank you in advance.
/Anton LindströmInverter Prototype_2022-01-12.pdf