Reply to "Interesting Electrical Regulator Failure"

OmanOGR Forum Member SUPPORTING MEMBERDIGITAL SUBSCRIBER

Stan corrected me on my use of the term back EMF. blush I was just referring to the inductance of the windings causing a negative spike. Actually, the lack of back EMF at start up would create in-rush current that puts the voltage regulator into current limit. When the current through the regulator is interrupted, the current through the windings then flows through the internal catch diode. This diode, I'm sure, can handle very little energy. The diode is probably intrinsic, not there by design to protect the IC.

7/26/169:07 AM

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