Re: Help identifying blown component in Dell PSU.
Ferrite beads are often used to slightly slow the turn-on and turn-off of fast switching MOSFETs and rectifiers. Super fast turn-ons and turn-offs tend to cause high frequency ringing, which causes conducted and radiated noise problems.
As stj seems to be suggesting, that noise can also get into regulator control circuits and cause problems.
I've also heard of situations where the Miller capacitance and fast voltage rise of fast switching MOSFETs turned the MOSFETs back on as they were being turned off and causing the MOSFETs to short.
Originally posted by roadrash
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As stj seems to be suggesting, that noise can also get into regulator control circuits and cause problems.
I've also heard of situations where the Miller capacitance and fast voltage rise of fast switching MOSFETs turned the MOSFETs back on as they were being turned off and causing the MOSFETs to short.
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