GENERAL DESCRIPTION
The NJU6052 is a white LED driver with an automatic dimming control. It contains an output driver, a PWM controller, a luminance sensor control (power supply for sensor & A/D converter), a step-up DC/DC converter, a serial interface, etc.
The output driver ensures a 60mA maximum capability which allows the connection of 12 white LEDs (4 series x 3 parallels). Depending on the ambient light sensed with an external luminance sensor, the PWM controller controls PWM duty in 8 steps preselected out of 64 steps. In addition, the frequency of the DC/DC converter is high so that it permits the use of small, low-profile inductors and capacitors to minimize the footprint in space-conscious applications. All of these benefits make the NJU6052 suitable for the battery-powered portable applications such as a cellular phone, a camcorder, PDA, etc.

FEATURES
# Drives up to 12 white LEDs (4 series x 3 parallels)
    VSW = 18.0V(Max.), IOUT = 60mA
# Built-in PWM Dimming Control(Selectable 8 out of 64 steps)
# Built-in Luminance Sensor Control (Power Supply for Sensor & A/D converter) (No MPU-access required after initial setting)
# Built-in Temperature Compensation Circuit to Suppress the Characteristic Degradation of LEDs
# Uses Small Inductor and Capacitors
# 1.8V to 3.6V Operating Voltage for Logic Circuits (VDDL)
# 3.0V to 5.5V Operating Voltage for Step-up Circuits (VDD)
# CMOS Technology
# Package : QFN28 / SSOP20