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MAX1698

更新时间： 2024-09-16 14:58:23
品牌 Logo 应用领域
亚德诺 - ADI 驱动
页数 文件大小 规格书
8页 167K
描述
高效率、升压型稳流器，用于LED驱动

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中文翻译

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MAX1698 数据手册

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19-1621; Rev 2; 2/07  
High-Efficiency Step-Up  
Current Regulator for LEDs  
General Description  
Features  
The MAX1698 and MAX1698A are efficient drivers for  
white or color LEDs. They are ideal for large LED backlit  
displays in PDAs and laptop computers. Numerous  
benefits include greater simplicity, lower cost, higher  
efficiency, longer bulb life, and greater reliability when  
compared to fluorescent (CCFL) and electrolumines-  
cent (EL) lamps.  
♦ Over 90% Efficiency  
♦ Lossless, Adjustable LED Brightness  
♦ Space-Saving 10-Pin µMAX Package  
♦ Simpler, Lower Cost, More Reliable Compared  
to CCFL or EL Backlights  
The MAX1698/MAX1698A are switch-mode boost con-  
trollers in which LED current, rather than output voltage,  
is regulated The devices drive series-connected LEDs  
with a controlled current that is measured with a typical-  
ly 15Ω sense resistor, not an expensive fractional-ohm  
value. LED current control and dimming are accom-  
plished with an adjust input (ADJ). For larger light out-  
put, multiple LED banks can be connected in parallel  
with up to 5W total output power.  
♦ Up to 5W Output Power  
Ordering Information  
PIN-  
PACKAGE  
PKG  
CODE  
PART  
TEMP RANGE  
10µMAX  
10µMAX  
MAX1698EUB  
-40°C to +85°C  
-40°C to +85°C  
U10-2  
U10-2  
MAX1698AEUB  
The MAX1698A has a higher, and more accurately  
specified, CS current limit than the MAX1698 for higher-  
power applications of 5W or more. Both devices are  
supplied in a space-saving 10-pin µMAX package that  
occupies half the space of an 8-pin SO. An evaluation  
kit (MAX1698EVKIT) is available to speed designs.  
Pin Configuration  
TOP VIEW  
V
1
2
3
4
5
10 EXT  
CC  
Applications  
SHDN  
REF  
9
8
7
6
CS  
MAX1698  
MAX1698A  
PGND  
GND  
FB  
Battery-Powered Backlight Applications  
Backlight for LCD Panels  
Notebook PCs  
ADJ  
GND  
Handy Terminals  
µMAX  
PDAs  
Typical Operating Circuit  
L
D1  
V
BATT  
V
OUT  
C
OUT  
V
EXT  
V
CC  
CC  
MAX1698  
MAX1698A  
ON  
I
CS  
LED  
SHDN  
REF  
OFF  
PGND  
ADJ  
FB  
GND  
R
R
N
FB  
________________________________________________________________ Maxim Integrated Products  
1
For pricing delivery, and ordering information please contact Maxim/Dallas Direct! at  
1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.  
12345678

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