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LT1948EMS8#TR

更新时间： 2024-10-03 13:09:39
品牌 Logo 应用领域
凌特 - Linear 转换器
页数 文件大小 规格书
4页 208K
描述
IC 1.5 A SWITCHING REGULATOR, 3600 kHz SWITCHING FREQ-MAX, PDSO8, PLASTIC, MSOP-8, Switching Regulator or Controller

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LT1948EMS8#TR 技术参数

是否Rohs认证：不符合生命周期：Obsolete
零件包装代码：MSOP包装说明：TSSOP,
针数：8Reach Compliance Code：compliant
ECCN代码：EAR99HTS代码：8542.39.00.01
风险等级：5.92Is Samacsys：N
模拟集成电路 - 其他类型：SWITCHING REGULATOR控制模式：CURRENT-MODE
最大输入电压：6 V最小输入电压：2.6 V
标称输入电压：3.3 VJESD-30 代码：S-PDSO-G8
JESD-609代码：e0长度：3 mm
湿度敏感等级：1功能数量：1
端子数量：8最高工作温度：70 °C
最低工作温度：最大输出电流：1.5 A
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）：255认证状态：Not Qualified
座面最大高度：1.1 mm表面贴装：YES
切换器配置：BOOST最大切换频率：3600 kHz
温度等级：INDUSTRIAL端子面层：TIN LEAD
端子形式：GULL WING端子节距：0.65 mm
端子位置：DUAL处于峰值回流温度下的最长时间：40
宽度：3 mmBase Number Matches：1

LT1948EMS8#TR 数据手册

 浏览型号LT1948EMS8#TR的Datasheet PDF文件第2页浏览型号LT1948EMS8#TR的Datasheet PDF文件第3页浏览型号LT1948EMS8#TR的Datasheet PDF文件第4页 
Final Electrical Specifications  
LT1948  
DC/DC Converter for  
TFT-LCD Panels  
OBSOLETE:  
Contact Linear Technology for Potential Replacement  
FOR INFORMATION PURPOSES ONLY  
August 2000  
U
FEATURES  
DESCRIPTIO  
The LT®1948 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 while the second regulator generates 23V at up to  
10mA for positive bias. A simple level-shift charge pump  
off the main switch node generates the negative bias  
voltage. An external capacitor sets the delay time from  
AVDD reaching final value to 23V appearing at the VON pin.  
The 3MHz switching frequency allows the use of tiny low  
profile chip inductors and capacitors throughout, provid-  
ingalownoise,lowcosttotalsolutionwithallcomponents  
under 1.25mm in height. The device operates from an  
input range of 2.6V to 6V and is available in an 8-lead  
MSOP package.  
I
Complete Solution Under 1.2mm  
I
Develops Three Outputs from a 3.3V or 5V Supply  
I
Externally Programmable VON Delay  
I
Fixed Frequency Low Noise Outputs  
I
All Ceramic Capacitors  
I
Operates at 3MHz Switching Frequency  
I
Fast Transient Response  
I
Few External Components Required  
I
2.6V to 6V Input Range  
Tiny 8-Lead MSOP Package  
I
U
APPLICATIO S  
I
TFT-LCD Notebook Display Panels  
I
TFT-LCD Desktop Monitor Display Panels  
I
Digital Cameras  
Handheld Computers  
, LTC and LT are registered trademarks of Linear Technology Corporation.  
I
U
TYPICAL APPLICATIO  
BAT54S  
D3A  
D3B  
V
OFF  
–8V  
15mA  
C5  
1µF  
C4  
0.22µF  
Start-Up Waveforms  
L1, 2.2µH  
L2, 2.2µH  
D1  
MBRM120  
VIN  
5V/DIV  
AV  
DD  
V
IN  
8V  
2.5V TO  
6V  
260mA  
VON  
20V/DIV  
R1  
53.6k  
L3  
2.2µH  
C1  
2.2µF  
C2  
2.2µF  
V
SW1  
IN  
SW2  
FB1  
D2  
R2  
10k  
LT1948  
AVDD  
10V/DIV  
CMDSH-3  
V
ON  
VO2  
V
23V  
ON  
10mA  
C
GND  
T
C3  
0.22µF  
C6  
22nF  
VOFF  
10V/DIV  
2ms/DIV  
1948 TA01a  
C1, C2: TAIYO YUDEN LMK212BJ225  
C3: TAIYO YUDEN TMK316BJ224  
C4: TAIYO YUDEN EMK212BJ224  
C5: TAIYO YUDEN LMK212BJ105  
L1–L3: TAIYO YUDEN LB2012-2R2  
1948 F01  
Figure 1. 3.3V Powered TFT-LCD Bias Generator  
Information furnished by Linear Technology Corporation is believed to be accurate and reliable.  
However, no responsibility is assumed for its use. Linear Technology Corporation makes no represen-  
tationthattheinterconnectionofitscircuitsasdescribedhereinwillnotinfringeonexistingpatentrights.  
1
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中文翻译

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