High-voltage high-power constant current LED driver device
US7855515B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 24, 2008 |
| Grant date | Dec 21, 2010 |
| Priority date | — |
| Expiry date | Aug 12, 2029 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH05B45/375
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
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 D3 which 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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.