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Old 07-23-2010, 04:33 PM   #3570 (permalink)
Mark Weisheimer
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Diode & Resistor combo

Originally Posted by voltmatic automaton View Post
okay so i have the parts, just one last question before i put them in, for the inverse parallel will the diode be letting current go to the power stage or should it be turned the other way?

its late so if my technical language gets slurred sorry...
hmmmm.....mine is always slurred.
The diode will go cathode (band end) towards the driver chip, and blank
end toward the IGBT gate.
It doesn't really matter as to diode or resistor towards which as
the diode will determine that current flows in that leg anyway.
The diode is allowing current to flow through ALL of the parallel resistors
when the gate driver chip is LOW.
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