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For the chevy volt board and leaf board, the volt uses 350amp/volt current sensors, and the leaf uses 400amp/volt current sensors. The full range from 0.5 to 4.5v would mean 700amp peak and 800amp peak for what the controller can actually read through the IGBTs. I can't tell what the leaf igbts are. They are 3 half bridges though, and are really big, but have insulating paper under them rather than metal. I honestly have no idea what their true rating is. The volt has 2 6 packs, that I think are rated for either 400amp or 600amp. The volt 6 pack is quite a bit smaller surface area than the 3 half bridges in the leaf. I do know the volt driver board fails at around 405 or 410 volts, almost like it's a crowbar circuit. Teh driver board makes the 18v or so from the high voltage. I've tested it down to around 50vDC, and stepped up by like 24v at a time (I was using solar panels,like an idiot, rather than a power supply). It failed at about 410vdc. my son is asking for a cookie and wants me to go with him.
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