White LED Driver
NJU6051
www.DataSheet4U.com
PRELIMINARY
White LED Driver with Automatic Dimming Control
! GENERAL DESCRIPTION The NJU6...
Description
NJU6051
www.DataSheet4U.com
PRELIMINARY
White LED Driver with Automatic Dimming Control
! GENERAL DESCRIPTION The NJU6051 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 30mA maximum capability which allows the connection of 8 white LEDs (4 series x 2 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 NJU6051 suitable for the battery-powered portable applications such as a cellular phone, a camcorder, PDA, etc. ! PACKAGE OUTLINE
NJU6051KM1
NJU6051V
! FEATURES
# Drives up to 8 white LEDs (4 series x 2 parallels)
VSW = 18.0V(Max.), IOUT = 30mA
# 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 Operati...
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