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NCP5010_06

更新时间： 2024-11-22 04:37:55
品牌 Logo 应用领域
安森美 - ONSEMI 转换器升压转换器
页数 文件大小 规格书
18页 174K
描述
500 mW Boost Converter for White LEDs

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NCP5010_06 数据手册

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NCP5010  
500 mW Boost Converter for  
White LEDs  
The NCP5010 is a fixed frequency PWM boost converter with  
integrated rectification optimized for constant current applications  
such as driving white LEDs. This device features small size, minimal  
external components and high−efficiency for use in portable  
applications and is capable of providing up to 500 mW output power  
to 2−5 series connected white LEDs. A single resistor sets the LED  
current and the CTRL pin can be pulse width modulated (PWM) to  
reduce the LED Current.  
The device includes True−Cutoff circuitry to disconnect the load  
from the battery when the device is put into standby mode. To protect  
the device, an output overvoltage protection, and short circuit  
protection have been incorporated. The NCP5010 is housed in a low  
profile, space efficient 1.7 x 1.7 mm Flip−Chip package. The device  
has been optimized for use with small inductors and ceramic  
capacitors.  
http://onsemi.com  
MARKING  
DIAGRAM  
A1  
8−Pin Flip−Chip  
FC SUFFIX  
DAXG  
AYWW  
CASE 499AJ  
1
DAX = Specific Device Code  
G
= Pb−Free Package  
= Assembly Location  
= Year  
A
Y
WW = Work Week  
Features  
• 2.7 to 5.5 V Input Voltage Range  
• Efficiency: 84% for 5 LED (V = 3.5 V by LED) at 30 mA and  
PIN CONNECTIONS  
F
4.2 V V  
IN  
• Low Noise 1 MHz PWM DC−DC Converter  
• Open LED Protection and Short Circuit Protection  
• Serial LEDs Architecture for Uniform Current Matching  
• 1 mA Shutdown Current Facility with True−Cutoff  
• Very Small 8−Pin Flip−Chip 1.7 x 1.7 mm Package  
• This is a Pb−Free Device  
A1  
A2  
A3  
AGND CTRL  
B1  
NC  
B3  
FB  
V
IN  
C1  
C2  
C3  
V
OUT  
SW PGND  
Top View  
Typical Applications  
• White LED Backlighting for Small Color LCD Displays  
• Cellular Phones  
ORDERING INFORMATION  
See detailed ordering and shipping information in the package  
dimensions section on page 16 of this data sheet.  
• Digital Cameras  
• MP3 Players  
• High Efficiency Step−up Converter  
90  
80  
70  
60  
50  
40  
30  
20  
10  
0
V
OUT  
= 5 LED (18 V)  
V
OUT  
= 3 LED (11 V)  
V
IN  
= 4.2 V  
1
10  
(mA)  
100  
I
OUT  
Figure 1. Efficiency vs. Output Current  
©
Semiconductor Components Industries, LLC, 2006  
1
Publication Order Number:  
August, 2006 − Rev. 1  
NCP5010/D  
1234567...18

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