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NUD4001 LED Design Tool
NUD4001 LED Design Tool Current Source Spreadsheet
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The NUD4001 from ON Semiconductor is a low cost versatile LED driver. The device allows the user to set the current with an external resistor and it is capable of delivering currents of up to 500 mA in a SO8 package. Of course, the 500 mA output current depends on a number of factors including input and output voltage, the number of LEDs driven and the amount of heatsinking that is provided on the PCB.