Electricity: electrical systems and devices – Safety and protection of systems and devices – With specific voltage responsive fault sensor
Patent
1996-08-05
1998-06-09
Gaffin, Jeffrey A.
Electricity: electrical systems and devices
Safety and protection of systems and devices
With specific voltage responsive fault sensor
361 93, H02H 320
Patent
active
057644675
ABSTRACT:
An apparatus for protecting switch-mode power supplies connected in parallel (SMPS) from overvoltage by ceasing operation of the load sharing circuit when voltage higher than a predetermined voltage level is applied to the load sharing pin. Under normal operation of the load sharing circuit in the prior art SMPS, all sets of SMPS connected in parallel equally share the loaded voltage. If heavy voltage is continuosly applied to the load sharing pin, however, all sets of SMPS connected to the load sharing pin malfunction, thereby driving SMPS out of order. The present invention is to provide a protection circuit to prevent all sets of SMPS from malfunctioning when heavy voltage is applied to the load sharing pin which exchanges load sharing signals in a plurality of SMPS connected in parallel.
REFERENCES:
patent: 4877972 (1989-10-01), Sobhani et al.
Gaffin Jeffrey A.
Leja Ronald W.
Samsung Electro-Mechanics Co.,Ltd.
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