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LM2754SQ/NOPB PDF预览

LM2754SQ/NOPB

更新时间： 2024-09-26 11:12:27
品牌 Logo 应用领域
德州仪器 - TI 开关驱动闪光灯接口集成电路电容器驱动器
页数 文件大小 规格书
20页 2393K
描述
具有超时保护功能的 800mA 开关电容器 LED 闪光灯驱动器 | RTW | 24 | -40 to 85

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中文翻译

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LM2754SQ/NOPB 技术参数

是否无铅：不含铅是否Rohs认证：符合
生命周期：Active包装说明：WQFN-24
Reach Compliance Code：compliantECCN代码：EAR99
HTS代码：8542.39.00.01Factory Lead Time：6 weeks
风险等级：0.75Is Samacsys：N
输入特性：STANDARD接口集成电路类型：LED DISPLAY DRIVER
JESD-30 代码：S-PQCC-N24JESD-609代码：e3
长度：4 mm湿度敏感等级：1
复用显示功能：NO功能数量：1
区段数：4端子数量：24
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：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
电源：3.6 V认证状态：Not Qualified
座面最大高度：0.8 mm子类别：Display Drivers
最大供电电压：5.5 V最小供电电压：2.8 V
标称供电电压：3.6 V表面贴装：YES
温度等级：INDUSTRIAL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：NOT SPECIFIED
宽度：4 mmBase Number Matches：1

LM2754SQ/NOPB 数据手册

 浏览型号LM2754SQ/NOPB的Datasheet PDF文件第2页浏览型号LM2754SQ/NOPB的Datasheet PDF文件第3页浏览型号LM2754SQ/NOPB的Datasheet PDF文件第4页浏览型号LM2754SQ/NOPB的Datasheet PDF文件第5页浏览型号LM2754SQ/NOPB的Datasheet PDF文件第6页浏览型号LM2754SQ/NOPB的Datasheet PDF文件第7页 
LM2754  
www.ti.com  
SNVS463A –SEPTEMBER 2006–REVISED MAY 2013  
LM2754 800mA Switched Capacitor Flash LED Driver with Time-Out Protection  
Check for Samples: LM2754  
1
FEATURES  
APPLICATIONS  
2
•
Up to 800mA Output Current  
•
•
•
Camera Flash in Mobile Phones  
Flash for Digital Cameras  
•
Wide Operating Input Voltage Range: 2.8V to  
5.5V  
Supplies for DSP’s, Microprocessors, Memory,  
MP3 Players, Pagers, Other Portable Devices  
•
•
Drives 1, 2, 3 or 4 LEDs in Parallel  
Ability to Disable One Current Sink Via the  
SEL Pin to Accommodate 3-LED Flash  
Modules  
DESCRIPTION  
The LM2754 is an integrated low noise, high current  
switched capacitor DC/DC converter with four  
regulated current sinks. The device is optimized for  
driving 1 to 4 high power white LEDs in parallel with a  
maximum current of 800mA. Maximum efficiency is  
achieved over the input voltage range by actively  
selecting the proper gain based on the LED forward  
voltage and current requirements.  
•
•
•
Time-Out Circuitry Limits Flash Duration to 1  
Second  
TX Input Ensures Synchronization with RF  
Power Amplifier Pulse  
Adaptive 1x, 1.5x and 2x Gains for Maximum  
Efficiency  
Two external low power resistors set the desired  
current for Torch and Flash modes. The TX pin  
allows the device to be forced into Torch mode during  
a Flash pulse, allowing for synchronization between  
the RF power amplifier pulse and Flash/Torch modes.  
To protect the device and Flash LEDs, internal Time-  
Out circuitry turns off the LM2754 in case of a faulty  
prolonged Flash mode. Internal soft-start circuitry  
limits the amount of inrush current during start-up.  
•
•
•
•
•
•
•
•
1MHz Constant Frequency Operation  
Output Current Limit  
True Shutdown Output Disconnect  
<1µA Shutdown Current  
Internal Soft-Start Limits Inrush Current  
No Inductor Required  
Total Solution Size without LED <28mm2  
Low Profile 24-Pin WQFN Package (4mm x  
4mm x 0.8mm)  
The LM2754 is available in a small 24-pin thermally  
enhanced WQFN package.  
Typical Application Circuit  
I
F
= 800 mA max  
V
= 3.0V - 5.5V  
IN  
V
IN  
V
OUT  
C +  
1
C
OUT  
2.2 µF  
4.7 µF  
C
IN  
D
1
D
2
D
3
D
4
2.2 µF  
2.2 µF  
C
1
C -  
1
D
1
D
2
D
3
D
4
C +  
2
LM2754  
C
2
EN  
T/F  
TX  
C -  
2
I
I
SET1  
SET2  
SEL  
GND  
R
R
SET1  
SET2  
TDK: 2.2 µF œ C1608X5R1C225  
4.7 µF œ C2012X5R1C475  
1
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of  
Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.  
All trademarks are the property of their respective owners.  
2
PRODUCTION DATA information is current as of publication date.  
Products conform to specifications per the terms of the Texas  
Instruments standard warranty. Production processing does not  
necessarily include testing of all parameters.  
Copyright © 2006–2013, Texas Instruments Incorporated  
1234567...20

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