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LT3466EDD-1#TR

更新时间： 2024-11-04 13:09:39
品牌 Logo 应用领域
凌特 - Linear 驱动器转换器稳压器开关式稳压器或控制器电源电路开关式控制器升压转换器
页数 文件大小 规格书
20页 401K
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LT3466EDD-1#TR 数据手册

 浏览型号LT3466EDD-1#TR的Datasheet PDF文件第2页浏览型号LT3466EDD-1#TR的Datasheet PDF文件第3页浏览型号LT3466EDD-1#TR的Datasheet PDF文件第4页浏览型号LT3466EDD-1#TR的Datasheet PDF文件第5页浏览型号LT3466EDD-1#TR的Datasheet PDF文件第6页浏览型号LT3466EDD-1#TR的Datasheet PDF文件第7页 
LT3466-1  
White LED Driver and Boost  
Converter in 3mm × 3mm  
DFN Package  
U
FEATURES  
DESCRIPTIO  
LT®3466-1 is a dual switching regulator that combines a  
white LED driver and a boost converter in a low profile,  
small footprint (3mm × 3mm × 0.75mm) DFN package.  
The LED driver can be configured to drive up to 10 White  
LEDs in series and the boost converter can be used for  
generating the LCD bias voltages or driving a secondary  
OLED display. Series connection of the LEDs provides  
identical LED currents resulting in uniform brightness and  
eliminating the need for ballast resistors and expensive  
factory calibration.  
■
Drives Up to 10 White LEDs from a 3.6V Supply  
■
Two Independent Step-Up DC/DC Converters  
■
Independent Dimming and Shutdown Control  
of the Outputs  
■
±1.5% Output Voltage Accuracy (Boost Converter)  
■
±4% LED Current Programming Accuracy  
■
Internal Schottky Diodes  
■
Internal Soft-Start Eliminates Inrush Current  
■
Output Overvoltage Protection (39.5V Max VOUT  
Fixed Frequency Operation Up to 2MHz  
83% Efficiency Driving 8 White LEDs at 15mA  
from a 3.6V Supply  
)
■
■
The LT3466-1 provides independent dimming and shut-  
down control of the two converters. The operating fre-  
quency can be set with an external resistor over a 200kHz  
to2MHzrange.ThewhiteLEDdriverfeaturesalow200mV  
reference, thereby minimizing power loss in the current  
setting resistor for better efficiency. The boost converter  
achieves ±1.5% output voltage accuracy by the use of a  
precision 0.8V reference. Protection features include out-  
put overvoltage protection and internal soft-start. Wide  
input supply range allows operation from 2.7V to 24V.  
■
■
Wide Input Voltage Range: 2.7V to 24V  
Tiny (3mm × 3mm) 10-Lead DFN Package  
U
APPLICATIO S  
■
White LED and OLED Displays  
■
Digital Cameras, Sub-Notebook PCs  
■
PDAs, Handheld Computers  
■
TFT - LCD Bias Supply  
, LTC and LT are registered trademarks of Linear Technology Corporation.  
All other trademarks are the property of their respective owners.  
■
Automotive  
U
TYPICAL APPLICATIO  
3V TO 5V  
Conversion Efficiency  
1µF  
90  
33µH  
33µH  
V
IN  
= 3.6V  
85  
80  
75  
70  
65  
60  
55  
50  
LED DRIVER  
SW1  
V
SW2  
IN  
BOOST CONVERTER  
16V  
6 LEDs  
V
V
OUT2  
LT3466-1  
OUT1  
30mA  
1µF  
1µF  
475k  
FB1  
FB2  
R
CTRL1  
GND  
CTRL2  
T
63.4k  
SHUTDOWN  
AND DIMMING  
CONTROL 1  
SHUTDOWN  
AND DIMMING  
CONTROL 2  
10Ω  
24.9k  
0
5
10  
15  
20  
25  
30  
OUTPUT CURRENT (mA)  
34661 F01a  
34661 F01b  
Figure 1. Li-Ion Powered Driver for 6 White LEDs and OLED Display  
34661f  
1
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LT3466EDD-1#TR 替代型号

型号 品牌 替代类型 描述 数据表
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