Gate drive circuit for isolated gate devices and method of opera

Details Gate drive circuit for isolated gate devices and method of opera Gate drive circuit for isolated gate devices and method of opera

1999-06-17

2000-07-25

Callahan, Timothy P.

Miscellaneous active electrical nonlinear devices, circuits, and

Gating

Utilizing three or more electrode solid-state device

327427, 327376, 327377, 327379, 327502, H03K 17687

Patent

active

060940875

ABSTRACT:
A gate drive circuit for an isolated gate device, a method of driving the same and a switch-mode power supply employing the circuit or the method. In one embodiment, the circuit includes: (1) a capacitor, having a first terminal coupled to a source of drive voltage and a second terminal coupled to a gate of the isolated gate device, that stores a charge therein when the drive voltage maintains the isolated gate device in an "on" state and (2) a conductive path, leading from the first terminal to an output terminal of the isolated gate device and enabled when the isolated gate device is to be transitioned from the "on" state to an "off" state, that provides a negative off-bias voltage to the gate thereby to avoid spurious turn-on of the isolated gate device.

REFERENCES:
patent: 4580063 (1986-04-01), Torelli et al.
patent: 5352932 (1994-10-01), Tihanyi
patent: 5723916 (1998-03-01), Disney et al.
patent: 5808504 (1998-09-01), Chikau et al.
patent: 5828261 (1998-10-01), Antone et al.
patent: 5910746 (1999-07-01), Fordyce
Reference from IGBTMOD and Intellimod.TM.--Intelligent Power Modules Applications and Technical Data Book by Powerex; Oct. 1994; 9 pages including cover sheets and pages A-49-A55.
Reference from IGBT Data Book "Fuji Hybrid IGBT Driver" Oct. 1992; cover sheet and pp. 303-312.
Reference from International Rectifier's HEXFET Power MOSFET Designer's Manual vol. III; "Gate Drive Characteristics and Requirements for Power HEXFETS"; Sep. 1993; cover sheets and pp. 1541-1548.

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