NJU6052

NJU6052 www.DataSheet4U.com PRELIMINARY White LED Driver with Automatic Dimming Control ! 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. ! PACKAGE OUTLINE NJU6052KN1 NJU6052V ! 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 Opera...