ZHCSCL9A July 2014 – September 2021 TPS55340-EP
PRODUCTION DATA
- 1 特性
- 2 应用
- 3 说明
- 4 Revision History
- 5 说明（续）
- 6 Pin Configuration and Functions
- 7 Specifications
-
8 Detailed Description
- 8.1 Overview
- 8.2 Functional Block Diagram
- 8.3
Feature Description
- 8.3.1 Switching Frequency
- 8.3.2 Voltage Reference and Setting Output Voltage
- 8.3.3 Soft Start
- 8.3.4 Slope Compensation
- 8.3.5 Overcurrent Protection and Frequency Foldback
- 8.3.6 Enable and Thermal Shutdown
- 8.3.7 Undervoltage Lockout (UVLO)
- 8.3.8 Minimum On-Time and Pulse Skipping
- 8.3.9 Layout Considerations
- 8.3.10 Thermal Considerations
- 8.4 Device Functional Modes
-
9 Application and Implementation
- 9.1 Application Information
- 9.2
Typical Applications
- 9.2.1
Boost Converter Application
- 9.2.1.1 Design Requirements
- 9.2.1.2
Detailed Design Procedure
- 9.2.1.2.1 Selecting the Switching Frequency (R4)
- 9.2.1.2.2 Determining the Duty Cycle
- 9.2.1.2.3 Selecting the Inductor (L1)
- 9.2.1.2.4 Computing the Maximum Output Current
- 9.2.1.2.5 Selecting the Output Capacitor (C8 to C10)
- 9.2.1.2.6 Selecting the Input Capacitors (C2, C7)
- 9.2.1.2.7 Setting Output Voltage (R1, R2)
- 9.2.1.2.8 Setting the Soft-Start Time (C7)
- 9.2.1.2.9 Selecting the Schottky Diode (D1)
- 9.2.1.2.10 Compensating the Control Loop (R3, C4, C5)
- 9.2.1.3 Application Curves
- 9.2.2
SEPIC Converter Application
- 9.2.2.1 Design Requirements
- 9.2.2.2
Detailed Design Procedure
- 9.2.2.2.1 Selecting the Switching Frequency (R4)
- 9.2.2.2.2 Duty Cycle
- 9.2.2.2.3 Selecting the Inductor (L1)
- 9.2.2.2.4 Calculating the Maximum Output Current
- 9.2.2.2.5 Selecting the Output Capacitor (C8 to C10)
- 9.2.2.2.6 Selecting the Series Capacitor (C6)
- 9.2.2.2.7 Selecting the Input Capacitor (C2, C7)
- 9.2.2.2.8 Selecting the Schottky Diode (D1)
- 9.2.2.2.9 Setting the Output Voltage (R1, R2)
- 9.2.2.2.10 Setting the Soft-Start Time (C3)
- 9.2.2.2.11 MOSFET Rating Considerations
- 9.2.2.2.12 Compensating the Control Loop (R3, C4)
- 9.2.2.3 SEPIC Converter Application Curves
- 9.2.1
Boost Converter Application
- 10Power Supply Recommendations
- 11Layout
- 12Device and Documentation Support
- 13Mechanical, Packaging, and Orderable Information
3 说明
TPS55340-EP 是一款单片非同步开关稳压器，带有集成的 5A/40V 电源开关。此器件可配置成多种标准开关稳压器拓扑，包括升压、SEPIC 和隔离反激式。此器件具有宽输入电压范围，可支持输入电压来自多节电池或者稳压的 3.3V、5V、12V 和 24V 电源轨的应用。
TPS55340-EP 使用电流模式脉宽调制 (PWM) 控制来调节输出电压，并具有一个内部振荡器。PWM 的开关频率由一个外部电阻器设定或者通过与一个外部时钟信号同步来设置。用户可以在 100kHz 至 1.2MHz 之间
对开关频率进行设定。
此器件具有可编程软启动功能，可限制启动期间的涌入电流，并且还具有其他内置保护特性，包括逐周期过流限制和热关断。
器件信息
| 订货编号 | 封装(1) | 封装尺寸（标称值） |
|---|---|---|
| TPS55340MRTETEP | WQFN (16) | 3.00mm × 3.00mm |
(1) 要了解所有可用封装，请见数据表末尾的可订购米6体育平台手机版_好二三四附录。
典型应用（升压）
效率与输出电流间的关系