Drive circuit for insulated gate switching element
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United States of America Patent
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Jan 26, 2016
Grant Date -
Jun 13, 2013
app pub date -
Jan 10, 2013
filing date -
May 11, 2011
priority date (Note) -
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Abstract
Embodiments of the invention provide a drive circuit including: a constant current source that generates a constant current; a switching circuit that connects a gate of the insulated gate switching element to a power supply potential side via the constant current source when turning the insulated gate switching element ON and connects the gate of the insulated gate switching element to a reference potential side via a discharge circuit when turning the insulated gate switching element OFF; a gate voltage detection circuit that detects a gate voltage of the insulated gate switching element; and a current mode selection circuit that switches a mode of the constant current source from a normal current mode to a low current consumption mode when detecting, based on the gate voltage detected by the gate voltage detection circuit, that the insulated gate switching element is turned ON.
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