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LT3497EDDB#TRPBF

更新时间： 2024-09-15 20:00:31
品牌 Logo 应用领域
凌特 - Linear 驱动光电二极管接口集成电路
页数 文件大小 规格书
20页 330K
描述
LT3497 - Dual Full Function White LED Driver with Integrated Schottky Diodes; Package: DFN; Pins: 10; Temperature Range: -40°C to 85°C

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中文翻译

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LT3497EDDB#TRPBF 技术参数

是否Rohs认证： 符合生命周期：Transferred
零件包装代码：DFN包装说明：HVSON, SOLCC10,.08,20
针数：10Reach Compliance Code：compliant
ECCN代码：EAR99HTS代码：8542.39.00.01
风险等级：5.07接口集成电路类型：LED DISPLAY DRIVER
JESD-30 代码：R-PDSO-N10JESD-609代码：e3
长度：3 mm湿度敏感等级：1
复用显示功能：NO功能数量：2
区段数：1端子数量：10
最高工作温度：85 °C最低工作温度：-40 °C
封装主体材料：PLASTIC/EPOXY封装代码：HVSON
封装等效代码：SOLCC10,.08,20封装形状：RECTANGULAR
封装形式：SMALL OUTLINE, HEAT SINK/SLUG, VERY THIN PROFILE峰值回流温度（摄氏度）：260
电源：3 V认证状态：Not Qualified
座面最大高度：0.8 mm子类别：Display Drivers
最大供电电压：10 V最小供电电压：2.5 V
标称供电电压：3 V表面贴装：YES
技术：BIPOLAR温度等级：INDUSTRIAL
端子面层：Matte Tin (Sn)端子形式：NO LEAD
端子节距：0.5 mm端子位置：DUAL
处于峰值回流温度下的最长时间：30宽度：2 mm
Base Number Matches：1

LT3497EDDB#TRPBF 数据手册

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LT3497  
Dual Full Function White  
LED Driver with Integrated  
Schottky Diodes  
FEATURES  
DESCRIPTION  
The LT®3497 is a dual full function step-up DC/DC con-  
verter specifically designed to drive up to 12 white LEDs  
(6whiteLEDsinseriesperconverter)fromaLi-Ioncell.Se-  
riesconnectionoftheLEDsprovidesidenticalLEDcurrents  
resulting in uniform brightness and eliminating the need  
for ballast resistors and expensive factory calibration.  
■
Drives Up to 12 White LEDs (6 in Series per  
Converter) from a 3V Supply  
■
Two Independent Boost Converters Capable of  
Driving Asymmetric LED Strings  
■
Independent Dimming and Shutdown Control of the  
Two LED Strings  
■
High Side Sense Allows “One Wire Current Source”  
The two independent converters are capable of driving  
asymmetric LED strings. Accurate LED dimming and  
shutdown of the two LED strings can also be controlled  
independently.TheLT3497featuresauniquehighsideLED  
current sense that enables the part to function as a “one  
wire current source;” one side of the LED string can be  
returned to ground anywhere, allowing a simpler 1-wire  
LED connection. Traditional LED drivers use a grounded  
resistor to sense LED current, requiring a 2-wire connec-  
tion to the LED string.  
per Converter  
■
Internal Schottky Diodes  
■
Open LED Protection (32V)  
■
2.3MHz Switching Frequency  
■
±±5 ꢀeference Accuracy  
■
V ꢀange: 2.±V to 10V  
IN  
Dual Wide 2±0:1 True Color PWMTM Dimming  
ꢀequires Only 1µF Output Capacitor per Converter  
Available in a 3mm × 2mm 10-Pin DFN Package  
■
■
■
The 2.3MHz switching frequency allows the use of tiny  
inductors and capacitors. Few external components are  
neededforthedualwhiteLEDDriver:open-LEDprotection  
and the Schottky diodes are all contained inside the 3mm  
× 2mm DFN package. With such a high level of integra-  
tion, the LT3497 provides a high efficiency dual white LED  
driver solution in the smallest of spaces.  
APPLICATIONS  
■
Cellular Phones  
■
PDAs, Handheld Computers  
■
Digital Cameras  
MP3 Players  
■
■
GPS ꢀeceivers  
, LT, LTC and LTM are registered trademarks of Linear Technology Corporation.  
True Color PWM is a trademark of Linear Technology Corporation.  
All other trademarks are the property of their respective owners.  
TYPICAL APPLICATION  
Li-Ion Power Driver for 4/4 White LEDs  
Efficiency  
V
80  
IN  
3V TO 5V  
V
= 3.6V  
IN  
4/4LEDs  
75  
1µF  
15µH  
SW1  
15µH  
SW2  
70  
65  
V
IN  
CAP1  
CAP2  
60  
55  
50  
LT3497  
10Ω  
10Ω  
1µF  
1µF  
LED1  
LED2  
CTRL1  
CTRL2  
GND  
3497 TA01a  
OFF ON  
OFF ON  
0
5
10  
15  
20  
SHUTDOWN  
AND DIMMING  
CONTROL 1  
SHUTDOWN  
AND DIMMING  
CONTROL 2  
LED CURRENT (mA)  
3497 TA01b  
3497f  
1
1234567...20

中文翻译

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