Electricity: electrical systems and devices – Safety and protection of systems and devices – Load shunting by fault responsive means
Patent
1998-01-06
1999-08-24
Gaffin, Jeffrey
Electricity: electrical systems and devices
Safety and protection of systems and devices
Load shunting by fault responsive means
361 58, 361113, 361115, H02H 900
Patent
active
059432004
ABSTRACT:
For use in a boost converter having a main boost switch, a boost inductor, a boost diode coupled to the boost inductor and the main boost switch and a resonant, passive snubber coupled to the boost inductor and the main boost switch that limits reverse recovery currents in the boost diode during a turn-on of the main boost switch, a peak voltage clamping circuit for, and method of, reducing voltage stress on the main boost switch caused by operation of the snubber. In one embodiment, the circuit includes a blocking switch and a zener diode, coupled in series between the main boost switch and the boost diode, that cooperate to provide a conductive path from the main boost switch to an output of the boost converter for electrical currents that exceed a predetermined peak voltage value thereby to reduce the voltage stress on the main boost switch.
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Gaffin Jeffrey
Jackson Stephen
Lucent Technologies - Inc.
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