ZHCSI45
April 2018
LM3478Q-Q1
PRODUCTION DATA.
1
特性
2
应用
3
说明
Device Images
典型的高效升压转换器
4
修订历史记录
5
Pin Configuration and Functions
Pin Functions
6
Specifications
6.1
Absolute Maximum Ratings
6.2
ESD Ratings - LM3478Q-Q1
6.3
Recommended Operating Conditions
6.4
Thermal Information
6.5
Electrical Characteristics
6.6
Typical Characteristics
7
Detailed Description
7.1
Overview
7.2
Functional Block Diagram
7.3
Feature Description
7.3.1
Overvoltage Protection
7.3.2
Slope Compensation Ramp
7.3.3
Frequency Adjust/Shutdown
7.3.4
Short-Circuit Protection
7.4
Device Functional Modes
8
Application and Implementation
8.1
Application Information
8.2
Typical Applications
8.2.1
Typical High Efficiency Step-Up (Boost) Converter
8.2.1.1
Design Requirements
8.2.1.2
Detailed Design Procedure
8.2.1.2.1
Custom Design with WEBENCH Tools
8.2.1.2.2
Power Inductor Selection
8.2.1.2.3
Programming the Output Voltage
8.2.1.2.4
Setting the Current Limit
8.2.1.2.5
Current Limit with External Slope Compensation
8.2.1.2.6
Power Diode Selection
8.2.1.2.7
Power MOSFET Selection
8.2.1.2.8
Input Capacitor Selection
8.2.1.2.9
Output Capacitor Selection
8.2.1.2.10
Compensation
8.2.1.3
Application Curves
8.2.2
Typical SEPIC Converter
8.2.2.1
Design Requirements
8.2.2.2
Detailed Design Procedure
8.2.2.2.1
Power MOSFET Selection
8.2.2.2.2
Power Diode Selection
8.2.2.2.3
Selection of Inductors L1 and L2
8.2.2.2.4
Sense Resistor Selection
8.2.2.2.5
Sepic Capacitor Selection
8.2.2.2.6
Input Capacitor Selection
8.2.2.2.7
Output Capacitor Selection
8.2.2.3
Application Curves
9
Power Supply Recommendations
10
Layout
10.1
Layout Guidelines
10.2
Layout Example
11
器件和文档支持
11.1
使用 WEBENCH 工具创建定制设计
11.2
接收文档更新通知
11.3
文档支持
11.3.1
相关文档
11.4
商标
11.5
静电放电警告
11.6
术语表
12
机械、封装和可订购信息
封装选项
机械数据 (封装 | 引脚)
DGK|8
MPDS028E
散热焊盘机械数据 (封装 | 引脚)
订购信息
zhcsi45_oa
zhcsi45_pm
8.2.1.3
Application Curves
Figure 32.
Efficiency vs Load Current (9-V In and 12-V Out)
Figure 33.
Efficiency vs Load Current (3.3-V In and 5-V Out)
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