High-voltage high-power constant current LED driver device

Details High-voltage high-power constant current LED driver device High-voltage high-power constant current LED driver device

2008-07-24

2010-12-21

Owens, Douglas W (Department: 2821)

Electric lamp and discharge devices: systems

Plural series connected load devices

Christmas lights

Reexamination Certificate

active

07855515

ABSTRACT:
A high-voltage high-power constant current LED driver device, can drive LED cluster, comprises switch tube, current sensing resistor Rcs and inductor L, particularly, comprises a low voltage control circuit that detects the voltage drop on the said current sensing resistor Rcs to produce a control signal transmitting to the control terminal of the switch tube; the said current sensing resistor Rcs connects with inductor L in series and is positioned between the output terminal of switch tube and the current output terminal of the current driving device in series connection; the input terminal of the said switch tube is connected to a DC voltage source; and also comprises a diode D3which the cathode is connected to the output terminal of the said switch tube and anti cathode is grounding. The device of the invention has the advantages of constant current, simple driving circuit and low cost under the high-voltage high-power application.

REFERENCES:
patent: 6577072 (2003-06-01), Saito et al.
patent: 6864641 (2005-03-01), Dygert
patent: 7265504 (2007-09-01), Grant et al.
patent: 7317302 (2008-01-01), Collins

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