Common White LED Driving Circuit

Published:2011/7/13 8:25:00 Author:Michel | Keyword: White LED, Driving Circuit | From:SeekIC

Figure 1 is 4 kinds of common white LED drive circuit and the white LED positive voltage differences will make different impacts to current stable accuracy because different stabilized voltage lines are used. The firgure 2 are six white LED(They are chosen from two manufactuers) positive electric current and forward voltage characteristic curve and , the output voltage stabilizer load curve and lies at the intersection of voltage characteristic curve is the point. Figure 1: Common White LED Driving Circuit Circuit shown in figure 1(a) uses voltage source converter and the current limit resistance to control the current white LED and the advantages of the way is that we can choose many kinds of regulators and meanwhile only one end of regulators are connected to white LED.



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