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    • 8. 发明授权
    • High-voltage high-power constant current LED driver device
    • 高压大功率恒流LED驱动器
    • US07855515B2
    • 2010-12-21
    • US12178746
    • 2008-07-24
    • Chaogang HuangYonghong Li
    • Chaogang HuangYonghong Li
    • H05B41/00
    • H05B33/0818
    • 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.
    • 一种高压大功率恒流LED驱动器件,可驱动LED集群,包括开关管,电流检测电阻器Rcs和电感器L,特别是包括一个低电压控制电路,用于检测电流检测电阻器Rcs上的电压降 以产生传送到开关管的控制端的控制信号; 所述电流感测电阻器Rcs串联连接电感器L,并且位于开关管的输出端子与串联连接的电流驱动装置的电流输出端子之间; 所述开关管的输入端连接到直流电压源; 并且还包括二极管D3,阴极连接到所述开关管的输出端子,反电极接地。 本发明的装置具有电流恒流,驱动电路简单,低电压大功率低成本的优点。