The amplitude of the displacement current produces corresponding voltage drops
across inductors and resistors, which have unwanted side effects on the driver or signal
electronics. Integrated solutionsmay showdangerous latch-up effects.
Many manufacturers of gate drivers give a maximum value of
in the datasheets.
This value indicates up to which
du value the gate driver will operate error free. When
switching IGBTs, rarely
values of more than
are reached. Typical values are
much lower. Coupling capacitances of signal transducers and DC/DC converters, but
also the coupling of bootstrap diodes should not be higher than 20pF per channel
hould serve as an example to illustrate a possible common mode current due to
Coupling capacitance and commonmode current