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TPS55340 集成式 5A 宽输入范围升压/SEPIC/反激式直流/直流稳压器
ZHCS901E
May 2012 – September 2021
TPS55340
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TPS55340 集成式 5A 宽输入范围升压/SEPIC/反激式直流/直流稳压器
1
特性
2
应用
3
说明
4
Revision History
5
Pin Configuration and Functions
6
Specifications
6.1
Absolute Maximum Ratings
6.2
ESD Ratings
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
Operation
7.3.2
Switching Frequency
7.3.3
Overcurrent Protection and Frequency Foldback
7.3.3.1
Minimum On-Time and Pulse Skipping
7.3.4
Voltage Reference and Setting Output Voltage
7.3.5
Soft-Start
7.3.6
Slope Compensation
7.3.7
Enable and Thermal Shutdown
7.3.8
Undervoltage Lockout (UVLO)
7.4
Device Functional Modes
7.4.1
Operation With VIN < 2.9 V (Minimum VIN)
7.4.2
Operation With EN Control
7.4.3
Operation at Light Loads
8
Application and Implementation
8.1
Application Information
8.2
Typical Applications
8.2.1
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
Selecting the Switching Frequency (R4)
8.2.1.2.3
Determining the Duty Cycle
8.2.1.2.4
Selecting the Inductor (L1)
8.2.1.2.5
Computing the Maximum Output Current
8.2.1.2.6
Selecting the Output Capacitors (C8, C9, C10)
8.2.1.2.7
Selecting the Input Capacitors (C2, C7)
8.2.1.2.8
Setting Output Voltage (R1, R2)
8.2.1.2.9
Setting the Soft-start Time (C7)
8.2.1.2.10
Selecting the Schottky Diode (D1)
8.2.1.2.11
Compensating the Control Loop (R3, C4, C5)
8.2.1.3
Application Curves
8.2.2
SEPIC Converter
8.2.2.1
Design Requirements
8.2.2.2
Detailed Design Procedure
8.2.2.2.1
Selecting the Switching Frequency (R4)
8.2.2.2.2
Duty Cycle
8.2.2.2.3
Selecting the Inductor (L1)
8.2.2.2.4
Calculating the Maximum Output Current
8.2.2.2.5
Selecting the Output Capacitors (C8, C9, C10)
8.2.2.2.6
Selecting the Series Capacitor (C6)
8.2.2.2.7
Selecting the Input Capacitor (C2, C7)
8.2.2.2.8
Selecting the Schottky Diode (D1)
8.2.2.2.9
Setting the Output Voltage (R1, R2)
8.2.2.2.10
Setting the Soft-start Time (C3)
8.2.2.2.11
MOSFET Rating Considerations
8.2.2.2.12
Compensating the Control Loop (R3, C4)
8.2.2.3
Application Curves
9
Power Supply Recommendations
10
Layout
10.1
Layout Guidelines
10.2
Layout Example
10.3
Thermal Considerations
11
Device and Documentation Support
11.1
Device Support
11.1.1
第三方产品免责声明
11.1.2
Development Support
11.1.2.1
Custom Design with WEBENCH Tools
11.2
接收文档更新通知
11.3
支持资源
11.4
Trademarks
11.5
静电放电警告
11.6
术语表
12
Mechanical, Packaging, and Orderable Information
重要声明
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