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NCP5021

ON Semiconductor
Part Number NCP5021
Manufacturer ON Semiconductor
Description High Voltage White LED Driver
Published Aug 20, 2009
Detailed Description NCP5021 High Voltage White LED Driver with Ambient Light Sensing The NCP5021 product is a single output boost LED drive...
Datasheet PDF File NCP5021 PDF File

NCP5021
NCP5021


Overview
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 = Work Week = Pb−Free Package (Note: Microdot may be in either location) PIN CONNECTIONS VOS VCC GND LX SCL SDA I2CADR VSB NC NC NC FB AMBS IPK IREF GND (Top View) NC = Not Connected ORDERING INFORMATION Device Package Shipping† NCP5021MUTXG UQFN16 3000 / Tape & Reel (Pb−Free) †For information on tape and reel specifications, including part orientation and tape sizes, please refer to our Tape and Reel Packaging Specification Brochure, BRD8011/D.
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