Gate drive circuit for power converters that reduces surge voltages
Patent 5936387 Issued on August 10, 1999. Estimated Expiration Date: 
October 16, 2017. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
October 16, 2017. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent ReferencesDual-mode amplifier Semiconductor module Solid state power controller High-frequency heating apparatus including ringing effect suppressor for switching element Synchronously rectified buck-flyback DC to DC power converter DC-to-DC converter having hysteretic current limiting Patent #: 5808455 InventorsAssigneeApplicationNo. 951228 filed on 10/16/1997US Classes:323/225, Plural devices323/271, Switched (e.g., on-off control)323/289, With base drive control dissipation363/56.11Having voltage protectionExaminersPrimary: Sterrett, JeffreyAttorney, Agent or FirmInternational ClassG05F 003/16Foreign Application Priority Data1996-10-17 JPAbstractA current detector includes a chopper circuit composed of a switching circuit, i.e. an inverse-parallel circuit composed of an insulated gate bipolar transistor IGBT and a diode, and a switching circuit, i.e. an inverse-parallel circuit composed of an IGBT and a diode, which are connected in series. When the diode on the opposite arm is turned on, a reverse recovery current is detected and its output is directed to a gate drive circuit via an insulating circuit. A switch in the gate drive circuit is opened to increase resistance, in order to reduce the speed at which the gate of the switching device is charged. Thus, the surge voltage and its increase ratio are reduced without reducing a switching speed or requiring a snubber circuit.Other References
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