Electricity: electrical systems and devices – Safety and protection of systems and devices – Transient responsive
Reexamination Certificate
2006-03-26
2009-02-24
Jackson, Stephen W (Department: 2836)
Electricity: electrical systems and devices
Safety and protection of systems and devices
Transient responsive
C361S091100, C361S118000
Reexamination Certificate
active
07495877
ABSTRACT:
A switching device includes a high-side MOSFET chip having a first high-side source connected to a low-side drain of a low-side MOSFET chip. The switching device further includes a transient reverse current diversion circuit connected to a drain of the low side MOSFET chip for diverting a reverse transient current therethrough whereby a reverse transient current in turning off the low side MOSFET chip is diverted from passing through a body diode of the low side MOSFET chip reducing a transient ringing oscillation. The reverse transient current diversion circuit includes a diode for conducting the reverse transient current from the drain. The reverse transient current diversion circuit further includes a capacitor connected between the diode and a source of the low side MOSFET chip.
REFERENCES:
patent: 5077651 (1991-12-01), Kobayashi et al.
patent: 5208495 (1993-05-01), De Palma et al.
patent: 5414609 (1995-05-01), Levran et al.
patent: 5552695 (1996-09-01), Schwartz
patent: 7190564 (2007-03-01), Yunus
patent: 7259440 (2007-08-01), Kelberlau
Alpha & Omega Semiconductor Ltd.
Jackson Stephen W
Lin Bo-In
Thomas Lucy
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