MOSFET controlling circuit for use in power electronics application, has comparator to receive filtered voltage across MOSFET and including voltage input for producing comparison result

摘要

The circuit has a comparator (8) to receive filtered detected voltage across a MOSFET (4) and including a voltage input for producing a comparison result with the voltage. The comparators output is applied to a MOSFET driving circuit. The output provides a signal that indicates conduction state of the MOSFET, to close channel of the MOSFET. The signal indicates to the driving circuit to open the channel. An independent claim is also included for a method of controlling a MOSFET operating in a synchronous rectifier mode for low voltage motor supply.