The NCR421U from Nexperia is an Automotive-Qualified LED Driver IC that is ideal for constant current LED drive, generic constant current sources, improving stabilized output current with paralleling drivers, and automotive applications. It requires an input voltage of up to 4.5 V. It provides an output voltage of less than 40 V. This AEC-Q101-qualified driver ensures a stabilized output current of 10 mA without an external resistor while the use of this resistor extends the current level up to 150 mA. It ensures high current accuracy under variations in supply voltage. This LED driver IC supports digital pulse width modulation (PWM) input signal up to 10 kHz for control. It reduces component count and board space, resulting in a compact design. This driver is available in a surface-mount package that measures 3.1 x 1.7 mm.