An LED driving arrangement

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 circui...

Full description

Saved in:
Bibliographic Details
Main Authors FERRO ALBERTO, ZANFORLIN NICOLA, DE ANNA PAOLO
Format Patent
LanguageChinese
English
Published 08.12.2010
Subjects
BASIC ELECTRIC ELEMENTS
ELECTRIC HEATING
ELECTRIC LIGHTING NOT OTHERWISE PROVIDED FOR
ELECTRIC SOLID STATE DEVICES NOT OTHERWISE PROVIDED FOR
ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
ELECTRICITY
SEMICONDUCTOR DEVICES
Online AccessGet full text

Cover

More Information
Summary: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 i
Bibliography:Application Number: CN200680048693