Multi-lamps instant start electronic ballast

Details Multi-lamps instant start electronic ballast Multi-lamps instant start electronic ballast

H - Electricity

05

B

H05B 41/14 (2006.01) H05B 41/24 (2006.01)

Patent

CA 2725723

The electronic ballast comprises a series half bridge resonant inverter and a control circuit for the inverter with dimming capability. The inverter includes a first and a second voltage feedback circuits including first and a second charge pumps coupled in between inverter output and the dimming input of the control circuit. The feedback circuits generate a reference control signal to control operation after starting and an error control signals when the inverter output voltage exceeds a predetermined value.

L'invention porte sur un ballast électronique qui comprend un onduleur résonant à demi-pont série et un circuit de commande pour l'onduleur à possibilité de gradation d'intensité. L'onduleur comprend des premier et second circuits de rétroaction de tension comprenant des première et seconde pompes de charge couplées entre la sortie de l'onduleur et l'entrée de gradation du circuit de commande. Les circuits de rétroaction génèrent un signal de commande de référence pour commander le fonctionnement après démarrage et un signal de correction d'erreur lorsque la tension de sortie de l'onduleur dépasse une valeur prédéterminée.

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