I am trying to use an IGBT module (dual IGBTs in common-emitter arrangement) as a static switch for 120VAC. I've done as much reading as I can, and I understand there are issues with losses and turn-on/off challenges. I am building 3 different switches using different devices and comparing losses, transient response, etc.
Here is my issue. I ended up burning the input (control) side of my gate driver. I think gate current went through it and destroyed it. High current (presumably) went out the VCC1 pin and into the microcontroller, destroying it as well. Everything else seems fine. The DC-DC converter appears unscathed, as does the IGBT and snubber.
I am not great at drawing schematics yet, so apologies for it being slightly messy. I am using a MGJ6 15V/10V DC-DC converter (https://www.mouser.com/datasheet/2/281/kdc_mgj6scdc-1019175.pdf) to power my gate driver, which is a 1EDC60I12AH (https://www.mouser.com/datasheet/2/196/Infineon-1EDCxxI12AH-DataSheet-v02_00-EN-1272149.pdf). 100nF decoupling caps on both modules and a 20μF bulk cap on each DC-DC output. 20R resistors on sink and source driver outputs. 1μF-47R snubber network. I tried following the recommended setup using a bipolar supply for the gate driver the datasheet recommended.
Have I made any foolish mistakes with my schematic or chosen components? Am I not grounding components properly? Is there some underlying isolation issue that isn't clear to me?