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G05F 1/40 (2006.01) G05F 1/44 (2006.01) G05F 1/56 (2006.01) H03K 17/12 (2006.01)
Patent
CA 1229379
Method of Operating Parallel- Connected Semiconductor Switch Elements Abstract In power circuit designs, it is sometimes ne- cessary to connect two or more semiconductor power switches in parallel and to simultaneously operate both so that current levels in excess of the rated current handling capability of one of the devices can be con- ducted. Such operation, however, encounters the problem of current sharing which results from variations in the characteristics of the parallel-connected devices. The method of the present invention obviates the difficulties encountered with current sharing by operating N parallel- connected semiconductor devices one at a time in sequen- tial fashion so that each device conducts an average cur- rent equal to the desired average output current divided by N.
498097
Thollot Pierre S.
Upadhyay Anand K.
Wold W. William
Riches Mckenzie & Herbert Llp
Sundstrand Corporation
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