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LT1942EUF

更新时间： 2024-11-30 22:51:47
品牌 Logo 应用领域
凌特 - Linear 驱动器转换器稳压器开关式稳压器或控制器电源电路开关式控制器
页数 文件大小 规格书
16页 249K
描述
Quad DCDC Converter for Triple Outputs TFT Supply Plus LED Driver

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中文翻译

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LT1942EUF 技术参数

是否Rohs认证： 不符合生命周期：Transferred
零件包装代码：QFN包装说明：HVQCCN, LCC24,.16SQ,20
针数：24Reach Compliance Code：not_compliant
ECCN代码：EAR99HTS代码：8542.39.00.01
风险等级：5.17Is 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：16 V最小输入电压：2.6 V
标称输入电压：3.3 VJESD-30 代码：S-PQCC-N24
JESD-609代码：e0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）：235
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：Tin/Lead (Sn/Pb)
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：20
宽度：4 mmBase Number Matches：1

LT1942EUF 数据手册

 浏览型号LT1942EUF的Datasheet PDF文件第2页浏览型号LT1942EUF的Datasheet PDF文件第3页浏览型号LT1942EUF的Datasheet PDF文件第4页浏览型号LT1942EUF的Datasheet PDF文件第5页浏览型号LT1942EUF的Datasheet PDF文件第6页浏览型号LT1942EUF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  
voltage.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.  
, LTC and LT are registered trademarks of Linear Technology Corporation.  
All other trademarks are the property of their respective owners.  
TFT Bias and White LED Backlight Power Supply  
CMDSH-3  
22µH  
AV  
5V  
Si2301BDS  
1M  
DD  
V
IN  
3V TO 4.2V  
22µH  
40mA  
0.22µF  
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  
1942fa  
1
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中文翻译

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LT1942EUF 替代型号

型号 品牌 替代类型 描述 数据表
LT1942EUF#TR Linear

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