Dimming circuit for controlling electrical power

Details Dimming circuit for controlling electrical power Dimming circuit for controlling electrical power

H - Electricity

05

B

H05B 39/04 (2006.01)

Patent

CA 2680225

A dimming circuit includes an isolated DC voltage source that is selectively coupled to a switch through which power is supplied from a source to a load. In a disclosed example, the switch comprises two MOSFETs. The isolated DC voltage source is selectively coupled directly to the gate and source of the MOSFETs to set them into an operative state for providing power to the load. A controller controls another switch that is operative to selectively control when the isolated DC voltage source is coupled to the switch.

L'invention concerne un circuit gradateur comprenant une source de tension de courant continu isolée qui est couplée sélectivement à un interrupteur par l'intermédiaire duquel le courant est fourni, d'une source vers une charge. Dans un exemple décrit, l'interrupteur comprend deux MOSFET. La source de tension de courant continu isolée est couplée sélectivement, directement à la grille et à la source des MOSFET pour les mettre en état de fonctionnement afin d'alimenter la charge. Un organe de commande commande un autre interrupteur qui permet de commander sélectivement le moment où la source de tension de courant continu isolée est couplée à l'interrupteur.

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