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Old 03-21-2011, 06:51 AM   #4508 (permalink)
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I think IGBTs, like diodes, have the property that the hotter a device gets, the lower the voltage drop. So, if you have 2 in parallel, the hotter one hogs more and more of the current, and can lead to thermal runaway. If you can keep both reasonably close in temperature, it's not so bad to run them in parallel.
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