NCP5021

NCP5021 High Voltage White LED Driver with Ambient Light Sensing The NCP5021 product is a single output boost LED driver capable of driving up to 8 LEDs in series for portable backlight applications. The built−in DC/DC converter is based on a high efficient PWM boost structure with 32 V output voltage span. It provides a peak 90% efficiency together with a 1% I−LED current tolerance. Features 2.7 to 5.5 V Input Voltage Range 90% Peak efficiency with 4.7 mH / 150 mW Inductor Gradual Dimming Built−in (Automatic Fade In/Fade Out Effect) Integrated Ambient Light Sensing Automatically Adjusts the LCD Backlight Contrast Built−in Zero Current Load Leakage under Idle Mode Support the Full I2C Protocol with Address Extension Tight 1% I−LED Tolerance Ultra Thin 0.5 mm QFN16 Package This is a Pb−Free Device Typical Applications Cellular Phone, Smartphone Portable Media Player (PMP) Global Positioning System (GPS) I−Load Max = 25 mA +Vbat L1 NSR0240M2T5G GND C1 4.7mH D8 4.7mF/6.3V 15 Vbat Lx 13 SCL SDA 1 SCL 2 SDA Vos 16 R3 470R GND SFH5711 U3 Log 4 C3 100nF R3 3 I2CADR 4 VSB U1 R4 22k GND NCP5021 C2 GND 12 220k 5 AMBS C4 GND R1 2.2mH 7 IREF 12k R2 6 IPK NNNCCC 22k GND GND FB 9 8 14 1112 10 1.0 mF/50 V D1 D2 D3 D4 D5 D6 D7 D8 GND Figure 1. Typical Large Display LED Driver http://onsemi.com 1 UQFN16 MU SUFFIX CASE 523AF MARKING DIAGRAM 5021 ALYWG G 5021 A L Y W G = Specific Device Code = Assembly Location = Wafer Lot = Year = Wo...