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LM2754SQ PDF预览

LM2754SQ

更新时间: 2024-11-13 04:44:35
品牌 Logo 应用领域
美国国家半导体 - NSC 显示驱动器驱动程序和接口开关接口集成电路闪光灯
页数 文件大小 规格书
11页 1051K
描述
800mA Switched Capacitor Flash LED Driver with Time-Out Protection

LM2754SQ 技术参数

是否Rohs认证:不符合生命周期:Transferred
包装说明:4 X 4 MM, 0.80 MM HEIGHT, LLP-24Reach Compliance Code:not_compliant
ECCN代码:EAR99HTS代码:8542.39.00.01
风险等级:5.14Is Samacsys:N
接口集成电路类型:LED DISPLAY DRIVERJESD-30 代码:S-XQCC-N24
JESD-609代码:e0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:UNSPECIFIED
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技术:CMOS
温度等级:INDUSTRIAL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:40
宽度:4 mm最小 fmax:1 MHz
Base Number Matches:1

LM2754SQ 数据手册

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September 2006  
LM2754  
800mA Switched Capacitor Flash LED Driver with  
Time-Out Protection  
General Description  
Features  
n Up to 800mA Output Current  
The LM2754 is an integrated low noise, high current  
switched capacitor DC/DC converter with four regulated cur-  
rent 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 volt-  
age range by actively selecting the proper gain based on the  
LED forward voltage and current requirements.  
n Wide Operating Input Voltage Range: 2.8V to 5.5V  
n Drives 1, 2, 3 or 4 LEDs in Parallel  
n Ability to Disable One Current Sink Via the SEL Pin to  
Accommodate 3-LED Flash Modules  
n Time-Out Circuitry Limits Flash Duration to 1 Second  
n TX Input Ensures Synchronization with RF Power  
Amplifier Pulse  
n Adaptive 1x, 1.5x and 2x Gains for Maximum Efficiency  
n 1MHz Constant Frequency Operation  
n Output Current Limit  
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 lim-  
its the amount of inrush current during start-up.  
n True Shutdown Output Disconnect  
<
n
1µA Shutdown Current  
n Internal Soft-Start Limits Inrush Current  
n No Inductor Required  
n Total Solution Size without LED 28mm  
The LM2754 is available in a small 24-pin thermally en-  
hanced LLP package.  
2
<
n Low Profile 24-Pin LLP Package (4mm x 4mm x 0.8mm)  
Applications  
n Camera Flash in Mobile Phones  
n Flash for Digital Cameras  
n Supplies for DSP’s, Microprocessors, Memory, MP3  
Players, Pagers, Other Portable Devices  
Typical Application Circuit  
20202801  
© 2006 National Semiconductor Corporation  
DS202028  
www.national.com  

LM2754SQ 替代型号

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