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LTC3490EDD PDF预览

LTC3490EDD

更新时间: 2024-02-17 20:38:43
品牌 Logo 应用领域
凌特 - Linear 驱动器
页数 文件大小 规格书
12页 124K
描述
Single Cell 350mA LED Driver

LTC3490EDD 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, SOLCC8,.11,20
针数:8Reach Compliance Code:compliant
ECCN代码:EAR99HTS代码:8542.39.00.01
风险等级:5.3接口集成电路类型:LED DISPLAY DRIVER
JESD-30 代码:S-PDSO-N8JESD-609代码:e3
长度:3 mm湿度敏感等级:1
功能数量:1区段数:1
端子数量:8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:SOLCC8,.11,20
封装形状:SQUARE封装形式:SMALL OUTLINE, HEAT SINK/SLUG, VERY THIN PROFILE
峰值回流温度(摄氏度):260电源:2.5 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:3.2 V
最小供电电压:1 V标称供电电压:2.5 V
表面贴装:YES技术:CMOS
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:3 mm

LTC3490EDD 数据手册

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LTC3490  
Single Cell 350mA  
LED Driver  
U
FEATURES  
DESCRIPTIO  
The LTC®3490 provides a constant current drive for 1W  
LED applications. It is a high efficiency boost converter  
that operates from 1 or 2 NiMH or alkaline cells and  
generates 350mA of constant current with up to 4V of  
compliance. It contains a 100mNFET switch and a  
130mPFET synchronous rectifier. The fixed switching  
frequency is internally set to 1.3MHz.  
350mA Constant Current Output  
2.8V to 4V Output Compliance  
1- or 2-Cell NiMH or Alkaline Input  
Synchronous Rectification: Up to 90% Efficiency  
Fixed Frequency Operation: 1.3MHz  
Low Quiescient Current: <1mA  
Very Low Shutdown Current: <50µA  
Open LED Output Limited to 4.7V  
TheLTC3490limitstheoutputvoltageto4.7Viftheoutput  
load is disconnected. It also features an analog dimming  
capability that reduces the drive current proportional to  
the CTRL/SHDN pin voltage. A low-battery logic output  
signals when the battery has dropped below 1V/cell. An  
undervoltage lockout circuit shuts down the LTC3490  
when the battery voltage drops below 0.85V/cell. The  
feedbackloopisinternallycompensatedtominimizecom-  
ponent count.  
VIN Range: 1V to 3.2V  
Dimming Control  
Undervoltage Lockout to Protect Batteries  
Low Profile (0.75mm) 3mm × 3mm Thermally  
Enhanced 8-Lead DD and S8 Packages  
U
APPLICATIO S  
Portable Lighting  
Rechargeable Flashlights  
, LTC and LT are registered trademarks of Linear Technology Corporation.  
All other trademarks are the property of their respective owners.  
U
TYPICAL APPLICATIO  
Efficiency vs VIN at VLED = 3.5V  
Single Cell Minimum Component LED Driver  
100  
3.3µH  
I
= 350mA  
OUT  
90  
80  
70  
60  
50  
40  
30  
20  
10  
0
V
SW  
IN  
CAP  
ON/OFF  
LTC3490  
1 NiMH OR  
ALKALINE  
CELL  
350mA  
+
4.7µF  
HIGH  
CURRENT  
LED  
CTRL/SHDN LED  
CELLS LOBAT  
1M  
GND  
3490 TA01  
1
1.5  
2
2.5  
3
V
(V)  
IN  
3490 TA02  
3490f  
1

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