XC9103 white LED driver circuit diagram

Published:2011/8/11 3:27:00 Author:Lucas | Keyword: white LED driver | From:SeekIC

Figure 1 is the commonly series white LED driver circuit schematic, and the driver IC in the figure is the XC9103 Series DC / DC converter. When it uses XC9103 Series devices, it can use the ceramic capacitor as the output capacitor CL to suppress unwanted signal radiation. In Figure 1, the step-up DC / DC converter outputs white LED drive current, of which value is equal to the value from FB pin control voltage dividing the resistance of the connecting resistor. XC9103's FB-pin control voltage is 0.9V, XC6367's FB-pin control voltage is 1.0V. Therefore, changing the resistance can adjust white LED drive current to the desired value.



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