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LTC1697 PDF预览

LTC1697

更新时间: 2024-01-14 09:53:10
品牌 Logo 应用领域
凌特 - Linear 稳压器开关
页数 文件大小 规格书
8页 103K
描述
High Efficiency Low Power 1W CCFL Switching Regulator

LTC1697 技术参数

是否无铅: 含铅是否Rohs认证: 符合
生命周期:Active包装说明:TSSOP,
针数:10Reach Compliance Code:compliant
风险等级:5.12接口集成电路类型:VACUUM FLUORESCENT DISPLAY DRIVER
JESD-30 代码:S-PDSO-G10JESD-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:1
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:TSSOP
封装形状:SQUARE封装形式:SMALL OUTLINE, THIN PROFILE, SHRINK PITCH
峰值回流温度(摄氏度):260认证状态:Not Qualified
座面最大高度:1.1 mm最大供电电压:5.5 V
最小供电电压:2.8 V标称供电电压:4 V
表面贴装:YES温度等级:INDUSTRIAL
端子面层:Matte Tin (Sn)端子形式:GULL WING
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
Base Number Matches:1

LTC1697 数据手册

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LTC1697  
High Efficiency Low Power  
1W CCFL Switching Regulator  
U
DESCRIPTIO  
FEATURES  
The LTC®1697 is designed to control a single 1W cold  
cathode fluorescent lamp (CCFL). An internal PWM dim-  
ming system maximizes efficiency and dimming range.  
Accurate lamp currents can be set with a single external  
resistor.  
Operates from Single Li-Ion Battery  
2.8V to 5.5V Input Voltage Range  
Very Low Shutdown Current: <2µA  
Synchronous Buck Architecture for High Efficiency  
PWM Dimming Frequency Adjustable with a Single  
Capacitor  
The LTC1697 includes a synchronous current mode PWM  
controller with internal 1A MOSFET switches. It contains  
a 300kHz oscillator, 0.8V reference, and internal current  
sense. It operates from a 2.8V to 5.5V input voltage. The  
LTC1697 also has a thermal limit and a shutdown that  
reduces supply current to <2µA.  
Accurate Lamp Current Maximizes Lamp Lifetime  
Fixed Frequency Operation at 300kHz  
Internal or External PWM Dimming  
Small 10-Pin MSUOP Package  
APPLICATIO S  
The LTC1697 is available in the MSOP-10 package.  
, LTC and LT are registered trademarks of Linear Technology Corporation.  
Protected by U.S. Patent 6522116.  
PDAs  
Handheld Computers  
Portable Instruments  
Handheld GPS with Map Display  
Handheld TV/Video Monitor  
U
TYPICAL APPLICATIO  
6
5
4
27pF  
1kV  
1
10  
2
3
ICCFL vs RPROG  
10  
9
8
V
IN  
330  
2.8V TO 5.5V  
0.15µF  
CCFL  
LAMP  
7
6
5
200k  
33µH  
4
3
+
V
SW 0V  
SEN  
IN  
Li-Ion  
CELL  
OFF ON  
DIMMING INPUT  
1V(0%) – 2V(100%)  
SHDN  
LTC1697  
V
C
LAMP  
DIM  
DIM  
2
4k  
R
V
C
PROG  
GND  
6k  
8k 10k  
()  
20k  
R
PROG  
10µF  
0.022µF  
0.1µF  
1967 TA01b  
8.25k  
1697 TA01  
1697f  
1

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