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LM3478MA/NOPB PDF预览

LM3478MA/NOPB

更新时间： 2024-11-21 12:27:39
品牌 Logo 应用领域
德州仪器 - TI 稳压器开关式稳压器或控制器电源电路开关式控制器光电二极管
页数 文件大小 规格书
32页 1398K
描述
High-Efficiency Low-Side N-Channel Controller for Switching Regulator

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LM3478MA/NOPB 技术参数

是否无铅： 不含铅是否Rohs认证： 符合
生命周期：Active零件包装代码：SOIC
包装说明：SOP, SOP8,.25针数：8
Reach Compliance Code：compliantECCN代码：EAR99
HTS代码：8542.39.00.01Factory Lead Time：6 weeks
风险等级：1.5模拟集成电路 - 其他类型：SWITCHING CONTROLLER
控制模式：CURRENT-MODE控制技术：PULSE WIDTH MODULATION
最大输入电压：40 V最小输入电压：2.97 V
标称输入电压：12 VJESD-30 代码：R-PDSO-G8
JESD-609代码：e3长度：4.9 mm
湿度敏感等级：1功能数量：1
端子数量：8最高工作温度：125 °C
最低工作温度：-40 °C最大输出电流：1 A
最大输出电压：500 V最小输出电压：1.26 V
封装主体材料：PLASTIC/EPOXY封装代码：SOP
封装等效代码：SOP8,.25封装形状：RECTANGULAR
封装形式：SMALL OUTLINE峰值回流温度（摄氏度）：260
认证状态：Not Qualified座面最大高度：1.75 mm
子类别：Switching Regulator or Controllers表面贴装：YES
切换器配置：SINGLE最大切换频率：1000 kHz
温度等级：AUTOMOTIVE端子面层：Matte Tin (Sn)
端子形式：GULL WING端子节距：1.27 mm
端子位置：DUAL处于峰值回流温度下的最长时间：NOT SPECIFIED
宽度：3.9 mmBase Number Matches：1

LM3478MA/NOPB 数据手册

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LM3478  
LM3478-Q1  
www.ti.com  
SNVS085V –JULY 2000–REVISED FEBRUARY 2013  
High-Efficiency Low-Side N-Channel Controller for Switching Regulator  
Check for Samples: LM3478, LM3478-Q1  
1
FEATURES  
APPLICATIONS  
2
•
LM3478Q in VSSOP-8 package is AEC-Q100  
qualified and manufactured on an Automotive  
Grade Flow  
•
•
•
•
•
Distributed Power Systems  
Battery Chargers  
Offline Power Supplies  
Telecom Power Supplies  
Automotive Power Systems  
•
•
8-lead VSSOP-8 and SOIC-8 packages  
Internal push-pull driver with 1A peak current  
capability  
•
•
Current limit and thermal shutdown  
KEY SPECIFICATIONS  
Frequency compensation optimized with a  
capacitor and a resistor  
•
•
•
•
Wide supply voltage range of 2.97V to 40V  
100kHz to 1MHz Adjustable clock frequency  
±2.5% (over temperature) internal reference  
10µA shutdown current (over temperature)  
•
•
•
Internal soft start  
Current Mode Operation  
Undervoltage Lockout with hysteresis  
DESCRIPTION  
The LM3478 is a versatile Low-Side N-Channel MOSFET controller for switching regulators. It is suitable for use  
in topologies requiring a low side MOSFET, such as boost, flyback, SEPIC, etc. Moreover, the LM3478 can be  
operated at extremely high switching frequency in order to reduce the overall solution size. The switching  
frequency of the LM3478 can be adjusted to any value between 100kHz and 1MHz by using a single external  
resistor. Current mode control provides superior bandwidth and transient response, besides cycle-by-cycle  
current limiting. Output current can be programmed with a single external resistor.  
The LM3478 has built in features such as thermal shutdown, short-circuit protection, over voltage protection, etc.  
Power saving shutdown mode reduces the total supply current to 5µA and allows power supply sequencing.  
Internal soft-start limits the inrush current at start-up.  
Typical Application Circuit  
Figure 1. Typical High Efficiency Step-Up (Boost) Converter  
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.  
2
All trademarks are the property of their respective owners.  
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 © 2000–2013, Texas Instruments Incorporated  
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LM3478MA/NOPB 替代型号

型号 品牌 替代类型 描述 数据表
LM3478MAX/NOPB TI

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