NJU6049

NJU6049 www.DataSheet4U.com PRELIMINARY High Efficiency White LED Driver ! GENERAL DESCRIPTION The NJU6049 is a high-efficiency white LED driver. It contains a high-efficiency step-up DC/DC converter and an output driver. The IC can output max.18V and drive as many as 4 white LEDs in series with a constant current, which guarantees the LEDs with uniform brightness. The high frequency of the step-up converter permits the use of small, low-profile inductors and capacitors to minimize the footprint in space-conscious applications. The NJU6049 also features low operating voltage of 1.7V and the small package VSP10. All of these benefits make the NJU6049 suitable for the battery-powered portable applications such as cellular phones, camcorders, PDAs, etc. ! PACKAGE OUTLINE NJU6049R ! FEATURES # Drives Up to 4White LEDs in Series IOUT = 20mA(typical) # Uses Small Inductor and Capacitors # 1.7V to 6.5V Operating Voltage for Step-up Circuits (VDD) # Low Switch RDS (ON) VSW = 18V, RDS=0.8Ω (ISW=150mA) # # # # OVP Function Shutdown terminal CMOS Technology Package : VSP10 ! PIN CONFIGURATION (TOP VIEW) FB NC VSS NC SW 1 2 3 4 5 10 9 8 7 6 SHDNb OVP VSS NC VDD Ver.2005-06-09 -1- NJU6049 www.DataSheet4U.com ! PIN DESCRIPTIONS No. 1 3,8 5 6 9 10 2,4,7 SYMBOL FB VSS SW VDD OVP SHDNb NC TYPE Input Power Input Power Input Input Feedback Terminal Ground Terminal Switch Terminal Power Supply terminal Over Voltage protection Terminal Shutdown Terminal Active “L” (Pull-up resist...