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LT1947EMSE

更新时间: 2024-10-03 05:43:27
品牌 Logo 应用领域
凌特 - Linear 稳压器开关
页数 文件大小 规格书
12页 187K
描述
Adjustable Output TFT-LCD Triple Switching Regulator

LT1947EMSE 技术参数

是否Rohs认证: 不符合生命周期:Transferred
零件包装代码:MSOP包装说明:HTSSOP, TSSOP10,.19,20
针数:10Reach Compliance Code:not_compliant
ECCN代码:EAR99HTS代码:8542.39.00.01
风险等级:5.19模拟集成电路 - 其他类型:SWITCHING REGULATOR
控制模式:CURRENT-MODE最大输入电压:8 V
最小输入电压:2.7 V标称输入电压:3.3 V
JESD-30 代码:S-PDSO-G10JESD-609代码:e0
长度:3 mm湿度敏感等级:1
功能数量:1端子数量:10
最高工作温度:70 °C最低工作温度:
最大输出电流:2 A封装主体材料:PLASTIC/EPOXY
封装代码:HTSSOP封装等效代码:TSSOP10,.19,20
封装形状:SQUARE封装形式:SMALL OUTLINE, HEAT SINK/SLUG, THIN PROFILE, SHRINK PITCH
峰值回流温度(摄氏度):235认证状态:Not Qualified
座面最大高度:1.1 mm子类别:Switching Regulator or Controllers
表面贴装:YES切换器配置:BOOST
最大切换频率:3500 kHz温度等级:COMMERCIAL
端子面层:Tin/Lead (Sn/Pb)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:20宽度:3 mm
Base Number Matches:1

LT1947EMSE 数据手册

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LT1947  
Adjustable Output TFT-LCD  
Triple Switching Regulator  
U
DESCRIPTIO  
FEATURES  
The LT®1947 is a highly integrated multiple output DC/DC  
converter designed for use in TFT-LCD panels. The device  
contains two independent switching regulators. The main  
regulator has an adjustable output voltage with an internal  
1.1A switch that can generate a boosted voltage as high as  
30V. The second regulator’s output is also adjustable up  
to 30V and can deliver 10mA for positive bias. A simple  
level-shift charge pump off the main switch node gener-  
ates the negative bias voltage. An external capacitor sets  
the delay time from AVDD’s final value to the rising edge at  
the VON pin. The 3MHz switching frequency allows the use  
of tiny low profile chip inductors and capacitors through-  
out, providing a low noise, low cost total solution with all  
components under 1.2mm in height. The device operates  
from an input range of 2.7V to 8V and is available in  
10-lead MSOP and thermally enhanced 10-lead MSOP  
packages.  
Complete Solution Under 1.2mm  
Develops Three Outputs from a 3.3V or 5V Supply  
Externally Programmable VON Delay  
Fixed Frequency Low Noise Outputs  
All Ceramic Capacitors  
3MHz Switching Frequency  
Fast Transient Response  
Few External Components Required  
2.7V to 8V Input Range  
Adjustable AVDD and VON Voltages  
Tiny 10-Lead MSOP and Thermally Enhanced  
10-Lead MSOP Packages  
U
APPLICATIO S  
TFT-LCD Notebook Display Panels  
TFT-LCD Desktop Monitor Display Panels  
Digital Cameras  
Handheld Computers  
, LTC and LT are registered trademarks of Linear Technology Corporation.  
All other trademarks are the property of their respective owners.  
U
TYPICAL APPLICATIO  
D3  
D4  
V
OFF  
–8V  
10mA  
C4  
0.68µF  
CERAMIC  
AV  
8V  
200mA  
C6  
L1  
0.68µF  
3.3µH  
DD  
V
IN  
D1  
Start-Up Waveforms  
L2  
4.7µH  
R1  
53.6k  
V
SW1  
FB1  
C2  
IN  
VSHDN  
5V/DIV  
3.3µF  
CERAMIC  
×2  
SW2  
C1  
D2  
2.2µF  
VON  
20V/DIV  
R2  
10k  
CERAMIC  
V
O2  
LT1947  
R3  
182k  
V
ON  
C3  
220nF  
FB2  
V
24V  
ON  
GND  
AVDD  
10V/DIV  
10mA  
R4  
10k  
C
T
SHDN  
SHUTDOWN  
C5  
10nF  
VOFF  
10V/DIV  
C1: TAIYO YUDEN LMK316BJ225MD  
C2: TAIYO YUDEN LMK325BJ335MD ×2  
C3: AVX 0.22µF 25V X7R  
D1: MBRM120LT3  
D2: CMDSH-3  
D3, D4: BAT54S DUAL DIODE  
L1: SUMIDA CLQ4D103R3  
L2: TAIYO YUDEN LB2012B4R7M  
2ms/DIV  
1947 TA01.tif  
1947 F01  
C4, C6: TAIYO YUDEN LMK107BJ684MA  
Figure 1. 3.3V Powered TFT-LCD Bias Generator  
1947fa  
1

LT1947EMSE 替代型号

型号 品牌 替代类型 描述 数据表
LT1947EMSE#PBF Linear

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