A led driving arrangement

H - Electricity – 05 – B

Patent

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

H05B 33/08 (2006.01)

Patent

CA 2627756

A circuit arrangement for driving LEDs, such as high- flux lighting LEDs includes: - a transformer (18) with a secondary winding (18b) for driving said LEDs and a primary winding, - a half-bridge arrangement (16) fed with an input voltage (IV) and coupled to the transformer (18), - a resonant circuit (Cl, C2, LuI; Cl, C2, LDl) between the half-bridge arrangement (16) and the primary winding of the transformer (18), the resonant circuit having a given resonance frequency (fr) , and - a controller (20) configured for switching (22a, 22b) the half-bridge arrangement (16) with a switching frequency variable between a first value (fl) and a second value (f2) . The second value (f2) is closer than the first value (fl) to the resonance frequency (fr) of the resonant circuit (Cl, C2, LuI; Cl, C2, LDl) created between the half-bridge arrangement (16) and the primary winding of the transformer (18) . This produces a boosting effect of the voltage fed towards the LEDs via the transformer (18) . The LEDs -are preferably included in the form of series of LEDs connected to the secondary winding (18b) of the transformer (18) via a rectifier placed outside the housing of the power-supply.

Agencement de circuit permettant d~entraîner des DEL, comme des DEL de flux élevé comportant : - un transformateur (18) pourvu d~un enroulement secondaire (18b) permettant d~entraîner lesdites DEL et d~un enroulement primaire, - un agencement (16) à semi-pont recevant une tension d'entrée (IV) et couplé au transformateur (18), - un circuit résonant (Cl, C2, LuI; Cl, C2, LDl) entre l~agencement (16) à semi-pont et l~enroulement primaire du transformateur (18), le circuit résonant étant doté d~une fréquence de résonance (fr) donnée, et - un contrôleur (20) configuré pour commuter (22a, 22b) l~agencement (16) à semi-pont avec une fréquence de commutation variable entre une première valeur (fl) et une seconde valeur (f2). La seconde valeur (f2) est plus proche que la première valeur (fl) de la fréquence de résonance (fr) du circuit résonant (Cl, C2, LuI; Cl, C2, LDl) créé entre l~agencement (16) à semi-pont et l~enroulement primaire du transformateur (18) . Ceci produit un effet de surmultiplication de la tension alimentée aux DEL par l~intermédiaire du transformateur (18). Les DEL sont de préférence incluses sous forme de séries de DEL connectées à l'enroulement secondaire (18b) du transformateur (18) par le biais d~un redresseur placé à l~extérieur du logement de l~alimentation.

LandOfFree

Say what you really think

Search LandOfFree.com for Canadian inventors and patents. Rate them and share your experience with other people.

Rating

A led driving arrangement does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with A led driving arrangement, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and A led driving arrangement will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFCA-PAI-O-1919907

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.