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LM3557SD-2 PDF预览

LM3557SD-2

更新时间: 2024-11-14 22:23:19
品牌 Logo 应用领域
美国国家半导体 - NSC 转换器升压转换器
页数 文件大小 规格书
11页 640K
描述
Step-Up Converter for White LED Applications

LM3557SD-2 技术参数

是否Rohs认证: 不符合生命周期:Transferred
包装说明:1 MM HEIGHT, LLP-8Reach Compliance Code:not_compliant
ECCN代码:EAR99HTS代码:8542.39.00.01
风险等级:5.32模拟集成电路 - 其他类型:SWITCHING REGULATOR
控制模式:CURRENT-MODE控制技术:PULSE WIDTH MODULATION
最大输入电压:7.5 V最小输入电压:2.7 V
标称输入电压:3.6 VJESD-30 代码:S-PDSO-N8
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:85 °C
最低工作温度:-40 °C最大输出电流:1.1 A
封装主体材料:PLASTIC/EPOXY封装代码:HVSON
封装形状:SQUARE封装形式:SMALL OUTLINE, 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表面贴装:YES
切换器配置:BOOST最大切换频率:1600 kHz
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:DUAL处于峰值回流温度下的最长时间:40
宽度:3 mm

LM3557SD-2 数据手册

 浏览型号LM3557SD-2的Datasheet PDF文件第2页浏览型号LM3557SD-2的Datasheet PDF文件第3页浏览型号LM3557SD-2的Datasheet PDF文件第4页浏览型号LM3557SD-2的Datasheet PDF文件第5页浏览型号LM3557SD-2的Datasheet PDF文件第6页浏览型号LM3557SD-2的Datasheet PDF文件第7页 
November 2004  
LM3557  
Step-Up Converter for White LED Applications  
n 1.25 MHz Constant-Switching Frequency  
n Output Over-Voltage Protection  
The LM3557 is a complete solution for white LED drive  
n Input Under-Voltage Protection  
General Description  
applications. With minimal external component count, no DC  
current leakage paths to ground, cycle-by-cycle current limit  
protection, and output over-voltage protection circuitry, the  
LM3557 offer superior performance and cost savings over  
standard DC/DC boost component implementations.  
n Cycle-By-Cycle Current Limit  
n TRUE SHUTDOWN: No DC current paths to ground  
during shutdown  
<
n Low Profile Package: 1 mm Height -8 Pin LLP  
n No External Compensation  
The LM3557 switches at a fixed-frequency of 1.25 MHz,  
which allows for the use of small external components. Also,  
the LM3557 has a wide input voltage range to take advan-  
tage of multi-cell input applications. With small external com-  
ponents, high fixed frequency operation, and wide input  
voltage range, the LM3557 is the most optimal choice for  
LED lighting applications.  
Applications  
n White LED Display Lighting  
n Cellular Phones  
n PDAs  
Features  
n VIN Range: 2.7V–7.5V  
n Small External Components  
Typical Application Circuit  
20131601  
FIGURE 1. Backlight Configuration  
© 2004 National Semiconductor Corporation  
DS201316  
www.national.com  

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