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LT1942EUF#PBF

更新时间： 2024-12-01 20:01:27
品牌 Logo 应用领域
凌特 - Linear 开关
页数 文件大小 规格书
16页 240K
描述
LT1942 - Quad DC/DC Converter for Triple Output TFT Supply Plus LED Driver; Package: QFN; Pins: 24; Temperature Range: -40°C to 85°C

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中文翻译

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LT1942EUF#PBF 技术参数

是否Rohs认证： 符合生命周期：Transferred
零件包装代码：QFN包装说明：HVQCCN, LCC24,.16SQ,20
针数：24Reach Compliance Code：compliant
ECCN代码：EAR99HTS代码：8542.39.00.01
风险等级：3.48模拟集成电路 - 其他类型：SWITCHING REGULATOR
控制模式：CURRENT-MODE最大输入电压：16 V
最小输入电压：2.6 V标称输入电压：3.3 V
JESD-30 代码：S-PQCC-N24JESD-609代码：e3
长度：4 mm湿度敏感等级：1
功能数量：1端子数量：24
最高工作温度：70 °C最低工作温度：
最大输出电流：4 A封装主体材料：PLASTIC/EPOXY
封装代码：HVQCCN封装等效代码：LCC24,.16SQ,20
封装形状：SQUARE封装形式：CHIP CARRIER, HEAT SINK/SLUG, VERY THIN PROFILE
峰值回流温度（摄氏度）：260认证状态：Not Qualified
座面最大高度：0.8 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：1200 kHz温度等级：COMMERCIAL
端子面层：Matte Tin (Sn)端子形式：NO LEAD
端子节距：0.5 mm端子位置：QUAD
处于峰值回流温度下的最长时间：30宽度：4 mm
Base Number Matches：1

LT1942EUF#PBF 数据手册

 浏览型号LT1942EUF#PBF的Datasheet PDF文件第2页浏览型号LT1942EUF#PBF的Datasheet PDF文件第3页浏览型号LT1942EUF#PBF的Datasheet PDF文件第4页浏览型号LT1942EUF#PBF的Datasheet PDF文件第5页浏览型号LT1942EUF#PBF的Datasheet PDF文件第6页浏览型号LT1942EUF#PBF的Datasheet PDF文件第7页 
LT1942  
Quad DC/DC Converter  
for Triple Output TFT Supply  
Plus LED Driver  
U
FEATURES  
DESCRIPTIO  
The LT®1942 is a highly integrated quad switching regu-  
lator designed to provide all necessary power supply  
functions for TFT displays, including the white LED  
backlight driver. The TFT supply incorporates two boost  
and one inverting DC/DC converters. The TFT supply  
output voltages are independently set, unlike charge  
pump solutions which have many limitations. Power  
sequencing for the TFT supply is built into the part and is  
user programmable.  
■
Triple Output TFT Supply with Built-In  
Power Sequencing  
■
Integrated White LED Backlight Driver  
■
Integrated Schottky Diodes  
■
Active Ballast Circuitry Ensures Precise Current  
Matching in White LEDs  
■
Low Noise 1MHz Fixed Frequency Operation  
■
2.6V to 16V Input Voltage Range  
Soft-Start Limits Inrush Current  
■
■
TFT Supply Output Voltages Independently Set  
The LED driver is a boost DC/DC converter that can be  
independently controlled. The LED driver has built-in  
dimming control for precise control of LED current. An 8:1  
dimming range is achieved by adjusting the CTRL4 volt-  
age. The user can elect to drive a single string or two  
strings of LEDs. An LED ballast circuit is included to  
preciselymatchtheLEDcurrentsiftwostringsofLEDsare  
used. Soft-start is built into the LED driver as well as the  
primary TFT supply.  
(Not Charge Pump Derived)  
■
Power Good and Output Disconnect for TFT Supply  
■
Built-In LED Dimming Capability  
■
Open LED Protection for LED Driver  
■
24-Lead QFN Package (4mm × 4mm)  
U
APPLICATIO S  
■
Poly-Silicon TFT Displays  
Amorphous Silicon TFT Displays  
■
The LT1942 is available in a low profile (0.75mm) 24-lead  
QFN (4mm × 4mm) package.  
, LT, LTC and LTM are registered trademarks of Linear Technology Corporation.  
All other trademarks are the property of their respective owners.  
U
TYPICAL APPLICATIO  
TFT Bias and White LED Backlight Power Supply  
CMDSH-3  
22µH  
AV  
5V  
Si2301BDS  
1M  
DD  
V
IN  
3V TO 4.2V  
22µH  
40mA  
2.2µF  
301k  
100k  
4.7pF  
698k  
100k  
D3  
FB3  
SW3  
V
SW1  
FB1  
CC  
V
0.22µF  
4.7µF  
ON  
20mA  
20mA  
4.7µF  
10V  
PGND14  
PGOOD  
SW4  
2mA  
PGND23  
10k  
V
IN  
V
OUT3  
LT1942  
33µH  
0.22µF  
NFB2  
D2  
D4  
665k  
LED1  
LED2  
47µH  
47µH  
V
–10V  
2mA  
OFF  
0.1µF  
SW2  
SHDN  
CTRL4 AGND SS1  
FB4  
SS4 CT  
SGND/  
V
IN  
SHUTDOWN  
1942 TA01  
4.99Ω  
0.1µF  
0.1µF  
0.1µF  
LED CONTROL  
1942fb  
1
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中文翻译

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LT1942EUF#PBF 替代型号

型号 品牌 替代类型 描述 数据表
LT1942EUF#TRPBF Linear

完全替代

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LT1942EUF#TR Linear

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 		1.4A, 1.5MHz Synchronous Step-Up DC/DC Converter with Output Disconnect

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