Lighting arrangement
AssigneeLumileds Lighting U.S., LLC
InventorsEngbert Bernard Gerard Nijhof, Marcel Johannes Maria Bucks, Johannes Matheus Theodorus Lambertus Claessens, Jozef Petrus Emanuel De Krijger
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Abstract
In a lighting arrangement comprising a LED array and a DC-DC-converter for supplying the LED array, the DC-DC-converter is an up-converter and the LED array is coupled between an input terminal and an output terminal. The up-converter generates a very low voltage over the LED array without making use of a transformer.
Claims7
A lighting arrangement comprising a LED array and a circuit arrangement for supplying the LED array, the circuit arrangement comprising a DC-DC-converter for generating a DC output voltage Vout out of a DC input voltage Vin and equipped with
- input terminals for connection to a supply voltage source supplying the DC input voltage Vin;
- an inductive element;
- a diode;
- a switching element for controlling the current through the inductive element;
- a control circuit coupled to a control electrode of the switching element for generating a control signal for rendering the switching element periodically alternately conductive and non-conductive;
- and
- output terminals between which the DC output voltage Vout is present during operation wherein a capacitor is coupled between the output terminals;
- wherein the LED array is coupled between an input terminal and an output terminal.
A lighting arrangement comprising a LED array and a circuit arrangement for supplying the LED array, the circuit arrangement comprising a DC-DC-converter for generating a DC output voltage Vout out of a DC input voltage Vin and equipped with
- input terminals for connection to a supply voltage source supplying the DC input voltage Vin;
- an inductive element;
- a diode;
- a switching element for controlling the current through the inductive element;
- a control circuit coupled to a control electrode of the switching element for generating a control signal for rendering the switching element periodically alternately conductive and non-conductive;
- and
- output terminals between which the DC output voltage Vout is present during operation;
- wherein the LED array is coupled between an input terminal and an output terminal;
- wherein the control circuit is equipped with means for operating the DC-DC-converter in the critical discontinuous mode.
A lighting arrangement comprising a LED array and a circuit arrangement for supplying the LED array, the circuit arrangement comprising a DC-DC-converter for generating a DC output voltage Vout out of a DC input voltage Vin and equipped with
- input terminals for connection to a supply voltage source supplying the DC input voltage Vin;
- an inductive element;
- a diode;
- a switching element for controlling the current through the inductive element;
- a control circuit coupled to a control electrode of the switching element for generating a control signal for rendering the switching element periodically alternately conductive and non-conductive;
- and
- output terminals between which the DC output voltage Vout is present during operation;
- wherein the LED array is coupled between an input terminal and an output terminal;
- wherein the DC-DC-converter is equipped with means I for controlling the average current through the LED array at a predetermined value.
Dependencies are inferred from the claim text.