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NCP5021

更新时间： 2024-11-22 05:52:03
品牌 Logo 应用领域
安森美 - ONSEMI 驱动器
页数 文件大小 规格书
17页 351K
描述
High Voltage White LED Driver with Ambient Light Sensing

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中文翻译

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NCP5021 数据手册

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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.  
http://onsemi.com  
Features  
1
• 2.7 to 5.5 V Input Voltage Range  
UQFN16  
MU SUFFIX  
CASE 523AF  
• 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  
MARKING DIAGRAM  
Backlight Contrast  
• Built−in Zero Current Load Leakage under Idle Mode  
• Support the Full I2C Protocol with Address Extension  
• Tight 1% I−LED Tolerance  
5021  
ALYWG  
G
• Ultra Thin 0.5 mm QFN16 Package  
• This is a Pb−Free Device  
5021  
A
L
= Specific Device Code  
= Assembly Location  
= Wafer Lot  
Y
W
G
= Year  
= Work Week  
= Pb−Free Package  
Typical Applications  
• Cellular Phone, Smartphone  
• Portable Media Player (PMP)  
• Global Positioning System (GPS)  
(Note: Microdot may be in either location)  
PIN CONNECTIONS  
+Vbat  
L1  
NSR0240M2T5G  
D8  
4.7mH  
D1  
C1  
GND  
13  
15  
1
SCL  
SDA  
I2CADR  
VSB  
NC  
NC  
NC  
FB  
D2  
D3  
D4  
4.7mF/6.3V  
Vbat  
Lx  
SCL  
SDA  
R3  
16  
SCL  
Vos  
2
SDA  
470R  
C2  
C3  
3
GND  
I2CADR  
VSB  
100nF  
R3  
4
SFH5711  
Log  
GND  
U3  
2
U1  
NCP5021  
D5  
GND  
5
22k  
R4  
4
(Top View)  
NC = Not Connected  
D6  
D7  
D8  
AMBS  
220k  
C4  
1
2.2mH  
12  
11  
10  
NC  
NC  
NC  
R1  
7
IREF  
IPK  
ORDERING INFORMATION  
12k  
R2  
6
†
Device  
Package  
Shipping  
9
22k  
NCP5021MUTXG UQFN16 3000 / Tape & Reel  
FB  
GND GND  
14  
GND  
(Pb−Free)  
8
†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.  
GND  
Figure 1. Typical Large Display LED Driver  
©
Semiconductor Components Industries, LLC, 2009  
1
Publication Order Number:  
May, 2009 − Rev. 0  
NCP5021/D  
 
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