NJU6053

Preliminary www.DataSheet4U.com NJU6053 PRELIMINARY White LED Driver with Automatic Dimming Control ! GENERAL DESCRIPTION The NJU6053 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 NJU6053 can turn three independent lighting circuits on/off separately or simultaneously with instruction. The output driver ensures a 40mA 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 NJU6053 suitable for the battery-powered portable applications such as a cellular phone, a camcorder, PDA, etc. ! PACKAGE OUTLINE NJU6053KP4 ! FEATURES # Drives up to 12 white LEDs (4 series x 3 parallels) # Controls 3 outputs separately VSW = 18.0V(Max), IOUT = 40mA # 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 Characterist...